CAN YOU INCREASE BORE/STROKE ON THE PUMA FOR MORE GRUNT??

[voltron]

I have been eagerly reading about engine upgrades for more power, torque etc. Also some peoples decision to do a complete engine and transmission swap in the hunt for more grunt on their Defenders.

If this is a silly question please forgive me as my knowledge of Deisel engines is still very limited compared to a petrol, but can you or has anybody increased the bore/stroke of their puma engines in the hunt for more power/torque?
If not what are the problems preventing this?

I have looked but found nothing on this.

Cheers

[isuzurover]

In theory it is possible, however I doubt there is a kit available. Many diesels run hardened liners so boring is not possible. That leaves stroking, for which you need a new crank, etc...

It would likely be easier and cheaper to fit a larger engine.

[MR LR]

Get rid of that useless 2.2 litre paper weight and fit a 3.2 from a new Ranger/BT50.

[n plus one]

I have been eagerly reading about engine upgrades for more power, torque etc. Also some peoples decision to do a complete engine and transmission swap in the hunt for more grunt on their Defenders.

If this is a silly question please forgive me as my knowledge of Deisel engines is still very limited compared to a petrol, but can you or has anybody increased the bore/stroke of their puma engines in the hunt for more power/torque?
If not what are the problems preventing this?

I have looked but found nothing on this.

Cheers

You'd be surprised how much extra poke you can tweak out of the standard engine for limited cost. Mine is up around 50% in power (135kw) and around 25% in torque (470nm) - its much stronger to drive than the standard truck, despite significant weight increases.

By way of comparison, this is slightly less power and slightly more torque than the standard LC76 V8 motor.

Next step will either be a 3.2 Puma conversion or a Duramax :twisted: - but that's 150,000 kms away at least.

[Bigbjorn]

Do what Land Rover should have done fifty years ago and put real engines in their cars. Minimum 5 litres.

[Pedro_The_Swift]

and break your driveline piece by piece:p

[Blknight.aus]

Do what Land Rover should have done fifty years ago and put real engines in their cars. Minimum 5 litres.

if only the english taxing laws would have allowed it...

or you could do it and maintain one of the key requirements of the vehicle being fuel economy...

didnt toymota horse around with bigger engines and pay for it at the pump for not much better performance than what landrover got out of their smaller displacement engines.

there are medium trucks getting around with less displacement than that.

[Bigbjorn]

if only the english taxing laws would have allowed it...

or you could do it and maintain one of the key requirements of the vehicle being fuel economy...

didnt toymota horse around with bigger engines and pay for it at the pump for not much better performance than what landrover got out of their smaller displacement engines.

there are medium trucks getting around with less displacement than that.

Land Rover paid for it in the market place, not at the pump. Get the cubic inches and do the job easy, and medium trucks with crappy little engines are a PIA to drive or to follow.

We were flogged in the Australian market place from late sixties on because the principal buyer group wanted to cruise easily at 60-70 mph. Cruisers and Patrols became the country vehicles of choice because they could.

[Pickles2]

Get rid of that useless 2.2 litre paper weight and fit a 3.2 from a new Ranger/BT50.
Yes, that would be a great conversion, do you know anyone that has done it?
Cheers, Pickles.

[voltron]

In theory it is possible, however I doubt there is a kit available. Many diesels run hardened liners so boring is not possible. That leaves stroking, for which you need a new crank, etc...

It would likely be easier and cheaper to fit a larger engine.

Ok , I was more just thinking boring and not increasing stroke, so that kills that idea.

I was speaking to a guy whilst camping a couple of weeks ago who said he had increased the bore size of his Hilux 3.0 to a 3.2 and reckoned it had tolerance to 3.4. Only reason he did it was because his motor needed a rebuild due to being a silly bugger so he figured he would increase displacement as well. Cost him $12k and Toyota quoted him a replacement motor for $14K.

I realise the chipping option is there, and will probably go down that path initially but as was mentioned I really like the idea of a 3.2 transplant. Just sussing out other potential options and there costing.

I have't even owned the car that long but I feel engine size is the only let down of the Defender, and this becomes more apparent to me the more weight I add to the car with accessories etc. The 2.2 does the job just fine but I just want more.

cheers

[voltron]

You'd be surprised how much extra poke you can tweak out of the standard engine for limited cost. Mine is up around 50% in power (135kw) and around 25% in torque (470nm) - its much stronger to drive than the standard truck, despite significant weight increases.

By way of comparison, this is slightly less power and slightly more torque than the standard LC76 V8 motor.

Next step will either be a 3.2 Puma conversion or a Duramax :twisted: - but that's 150,000 kms away at least.

That is impressive numbers. Is it possible to PM me the cost of the tweaks as I might get it done sooner rather then later.

Cheers.

[voltron]

Yes, that would be a great conversion, do you know anyone that has done it?
Cheers, Pickles.

Pickles someone posted an article where they have done it in the U.K and it went into a 90. Looked really nice, they featured it in LRO magazine.

[uninformed]

yes the 3.2 has been swapped into a LR or 2…but you better take out a small home loan for the stand alone harness to control it :mad:

[n plus one]

That is impressive numbers. Is it possible to PM me the cost of the tweaks as I might get it done sooner rather then later.

Cheers.

Happy to make 'em public.

~ $1,000 for a BAS remap (by far the biggest difference)

~ $1,000 for Allisport intercooler and silicone hoses

~ $200 for a Nugget air intake kit (makes a surprising difference according to my seat-of-the-pants dyno)

~ $1,600 for a Taipan exhaust (haven't done this yet - cheaper options include a simple decat and removal of the centre muffler)

Pretty straight forward stuff that make a MASSIVE difference to the truck.

Not as much as a Duramax conversion though :angel:

[Bush65]

You'd be surprised how much extra poke you can tweak out of the standard engine for limited cost. Mine is up around 50% in power (135kw) and around 25% in torque (470nm) - its much stronger to drive than the standard truck, despite significant weight increases.

By way of comparison, this is slightly less power and slightly more torque than the standard LC76 V8 motor.

Next step will either be a 3.2 Puma conversion or a Duramax :twisted: - but that's 150,000 kms away at least.
You figures don't align with those quoted on the BAS site (https://secure.bellautoservices.co.uk/store/'model_number=def22remap&submenuid=55&submenu=BAS%20Remap%20Tuning) i.e. stock 122 HP and 360 Nm to 170 HP (127 kW) and 450 Nm

https://www.aulro.com/afvb/images/imported/2013/12/495.jpg

Then you have to factor in cost, etc. to ship the engine control module to BAS and return after re-map


Remap by post is ONLY applicable to engine control modules with part number CH12-12C520-AD and NOT with part number CH12-12C520-AC. In cases that the ecu has already had a software update at the dealers then this exclution is not applicable.

Edit: Although the thread mentions Puma, the OP has the Mazda based 2.2 litre engine, not the Puma engine so I guess that is where the confusion comes from.

It seems many are calling Defenders Pumas these days even though they are not.

[101RRS]

Edit: Although the thread mentions Puma, the OP has the Mazda based 2.2 litre engine, not the Puma engine so I guess that is where the confusion comes from.

It seems many are calling Defenders Pumas these days even though they are not.

The 2.2 is a Puma (Ford Duratorq) engine and is a development of the 2.4 unit. Might be fitted to the Mazda BT50s but is from the Puma family of engines.

I think you are thinking of the W engines which are Mazda engines and are not related to the Puma. The 2.2 in the Defender is not one of these engines.

Garry

[n plus one]

Yeah, I was pretty sure the 2.2 continues to be a 'Puma' motor - although Bush 65 is correct in that the remap procedures (and outcomes) are slightly different for the 2.2 v.s. the 2.4 motor.

Re costs, I wouldn't have thought postage on a remap module/ecu would be a material consideration relative to the quantum of figures I posted?

[Bush65]

The 2.2 is a Puma (Ford Duratorq) engine and is a development of the 2.4 unit. Might be fitted to the Mazda BT50s but is from the Puma family of engines.

I think you are thinking of the W engines which are Mazda engines and are not related to the Puma. The 2.2 in the Defender is not one of these engines.

Garry
Thanks Garry, I can't find where I got the info that stuck in my mind, it also told me about the update to the fuel injection system.

However the Wikipedia page on the Ford Duratorq supports what you said. And says the 2.2 developed from the Mazda engine was used in the evoque and freelander.

I still don't think it is valid to call Defenders Pumas.

[uninformed]

Thanks Garry, I can't find where I got the info that stuck in my mind, it also told me about the update to the fuel injection system.

However the Wikipedia page on the Ford Duratorq supports what you said. And says the 2.2 developed from the Mazda engine was used in the evoque and freelander.

I still don't think it is valid to call Defenders Pumas.

mazda 2.2? Im reading that 2.2 as in the Evoque and Freelander as being a PSA DW engine (parent company of Citroen and Peugeot). Only reference I can find to Mazda is the 2.5l and 3.0l engine:

"Codenamed Puma during development, these Ford 2.0 L, 2.2 L, and 2.4 L engines are called ZSD. They are produced at the company's Dagenham plant in east London.
Note: the 2.5 and 3.0L "W" engines in above table are NOT Puma engines. They are Mazda designed commercial Diesel engines with no commonality to Puma. The "W" engine family is used in the Asia Pacific Ranger and Everest models currently running out."

we never called the Tdi "Gemini" either ;)

[101RRS]

Thanks Garry, I can't find where I got the info that stuck in my mind, it also told me about the update to the fuel injection system.

However the Wikipedia page on the Ford Duratorq supports what you said. And says the 2.2 developed from the Mazda engine was used in the evoque and freelander.

I still don't think it is valid to call Defenders Pumas.

No wurries - i agree about calling the Defender Pumas as it is the engine that is coded Puma not the vehicle - we don't call any other Landies by their engines code names.

There was a heated discussion on this some years back where I got flamed because I said that if we were going to call them Pumas we might as well call them Big Pussies but that went down like a lead balloon, particularly with the Defender owners.

Wikipedia is a great resource but not always correct.

Cheers

Garry

[Benz]

Surely getting the 2.2 remapped would be a much better option.

unless you have lots of spare cash laying around for a transplant.

[voltron]

Definitely a remap is cheaper option then rebuilding and boring
But I'm not sure a transplant would be cheaper. Also if you could
increase bore size then you can still work with the current setup you
have outside of new pistons to cater for increased bore and a re tune. You may need new injectors possibly and fuel pump , fuel rail etc if the standard ones aren't up to the task, then the $$ will begin to mount up but, the unknowns of a transplant screams $$$ IMO.

As I said speaking to a fellow who did this to his 3L Hilux, it seemed like a simple solution for the lack of displacement the 2.2 has and with no issues of making it all fit and work that a transplant creates.

Deisel engines are new to me so it probably is never that simple.

[n plus one]

FYI, I got the traction control going three times on the dry bitumen while 'running some errands' this morning (bought a new UHF!).

I ain't saying its a powerhouse, I'm just saying that it was in third gear every time and Canberra has a lot of roundabouts :twisted:

[djam1]

You need an ATB in the front diff


FYI, I got the traction control going three times on the dry bitumen while 'running some errands' this morning (bought a new UHF!).

I ain't saying its a powerhouse, I'm just saying that it was in third gear every time and Canberra has a lot of roundabouts :twisted:

[n plus one]

You need an ATB in the front diff

Already running one!

[djam1]

Then you need to drive slower

[n plus one]

Then you need to drive slower

Probably right - but you need to stop the carbon from building up every now and then...

[voltron]

You certainly have my attention. Maybe with a tune I can at least try and
hang with those FJ drivers who seem to think they are in race cars then in a 4wd.

I swear to god I don't see many of them doing the speed limit around
town.

Jelly much.

[Benz]

You certainly have my attention. Maybe with a tune I can at least try and
hang with those FJ drivers who seem to think they are in race cars then in a 4wd.

I swear to god I don't see many of them doing the speed limit around
town.

Jelly much.

the defender has it were it counts
don't worry about that

[n plus one]

You certainly have my attention. Maybe with a tune I can at least try and
hang with those FJ drivers who seem to think they are in race cars then in a 4wd.

I swear to god I don't see many of them doing the speed limit around
town.

Jelly much.

Hmmm, FJ drivers are good value - a few friends and I (half jokingly) use them as the threshold to determine whether a campsite/pub/bakery is a bit lah-dee-Dahl - i.e. if there's an FJ there, you know what your getting yourself into.

A bit uncharitable, but kind of fun (and surprisingly reliable) :D

I reckon you might give them a nudge in an unladen defender that's had some tweaks, but rowing through the six speed will probably mean they win the day :(

[Dougal]

It is far easier to increase boost and fuel than displacement. A good remap can do it, but a bad remap is a serious danger to your engine.
Fit an egt gauge before any engine mods.

[n plus one]

It is far easier to increase boost and fuel than displacement. A good remap can do it, but a bad remap is a serious danger to your engine.
Fit an egt gauge before any engine mods.

Good advice - I did a fair bit of research on these mods before going ahead and everything I read indicated that they have reduced the EGTs in others' vehicles.

I had a lot of trouble getting the EGT monitor I wanted (Madman) so I am only now in the process of fitting one to my vehicle.

For the benefit of others, I'll circle back to this thread with some indicative values once the install I'd complete - though I'm pretty confident all is well.

[Dougal]

Good advice - I did a fair bit of research on these mods before going ahead and everything I read indicated that they have reduced the EGTs in others' vehicles.

I had a lot of trouble getting the EGT monitor I wanted (Madman) so I am only now in the process of fitting one to my vehicle.

For the benefit of others, I'll circle back to this thread with some indicative values once the install I'd complete - though I'm pretty confident all is well.

The intercooler upgrade in isolation will reduce EGT. But every remap which increases power also increases EGT.
Diesel engines are heat engines. To produce more power, they first produce more heat. To keep the temperature down to safe levels more boost is run, but there is a limit on the available boost through the factory turbo. So many remappers run the air/fuel mix richer with comparatively more fuel. This pushes EGT higher still.

A remap that is perfectly safe for a vehicle that never tows in a cooler climate may be too hot for a vehicle which tows in a hotter climate.
Altitude can also be a problem for some (overspeeding turbochargers due to thinner air). But not so much in Australia.

[n plus one]

Noted - that's why I have been going off local/SA experiences (rather than UK/Europe).

Factor maps are extremely conservative for the reasons you've noted ( amongst other reasons anyway).

FYI EGR appears to play a meaningful role in Puma EGTs too.

[Drover]

FYI EGR appears to play a meaningful role in Puma EGTs too.

So, are you saying there is a benifit ( lower EGT's ) by having the EGR closed or open ?

I have the current BAS map. Pete has the EGR valve electronically closed.

[forgottenpoppy]

I got an extra 40bhp from an engine tune and it has smoothed the power delivery through the gears out, and created a power band at 2000revs where it really pulls. That's without changing the intercooler or adding a variable veined turbo. But it also shut the egr valve off. I also fitted a decat exhaust with only a mid box in :)
Very small changes for a lot of extra engine power :)

[Dougal]

I got an extra 40bhp from an engine tune and it has smoothed the power delivery through the gears out, and created a power band at 2000revs where it really pulls. That's without changing the intercooler or adding a variable veined turbo. But it also shut the egr valve off. I also fitted a decat exhaust with only a mid box in :)
Very small changes for a lot of extra engine power :)

They already have a variable vane turbo.

[isuzurover]

They already have a variable vane turbo.

But not a variable vein turbo ;)

[Dougal]

But not a variable vein turbo ;)

Is the biggest variable vein the Varicose?

[n plus one]

Is the biggest variable vein the Varicose?

No it's the main vein...

Ahem, sorry couldn't help myself :D

Drover - programs with the EGR closed appear to reduce EGTs.

[Dougal]

No it's the main vein...

Ahem, sorry couldn't help myself :D

Drover - EGR closed reduces EGTs (cooler intake charge).

I'm gonna get me an arterial turbo.

Egr should always be shut at full throttle and have no effect on egt there.

[Pickles2]

Who is an agent for B.A.S. in Victoria?
Pickles.

[slug_burner]

I understand that the whole purpose of EGR is to reduce the combustion temperature. Reduced combustion temperatures produce less NOX.

I don't know as to when the the EGR valve is opened or closed, Dougal says full throttle should have EGR closed.

There is a requirement to cool the EG so don't know if the cooled EG would produce a higher EGT due to it's increased temperature or more likely the increased fuel results in higher EGT.

[Drover]

Who is an agent for B.A.S. in Victoria?
Pickles.

Deal direct with Pete (BAS) in the UK.

BAS Performance Remaps. Landrover tuning at its best! (http://bellautoservices.co.uk)

[forgottenpoppy]

They already have a variable vane turbo.

its just a standard garret turbo not an adjustable one

The variable geometry one is the non standard. Which you can set up for different purposes and need a small mortgage for. Which was what I was referring to earlier :D

[Pickles2]

Deal direct with Pete (BAS) in the UK.

BAS Performance Remaps. Landrover tuning at its best! (http://bellautoservices.co.uk)
Well yes, I know I could do that, but being computer & mechanical hopeless/useless, I'd want someone local to me to support it/me, if something went "wrong", as these things sometimes do.
I am aware of Pete's awesome reputation, & if I lived in the UK, there'd be no discussion,.....I'd have been to see him by now!
Thanks, Pickles.

[forgottenpoppy]

Deal direct with Pete (BAS) in the UK.

BAS Performance Remaps. Landrover tuning at its best! (http://bellautoservices.co.uk)

That's who tuned mine, great company to deal with.

[Dougal]

its just a standard garret turbo not an adjustable one

The variable geometry one is the non standard. Which you can set up for different purposes and need a small mortgage for. Which was what I was referring to earlier :D

That's certainly true on the TD5. But this thread is about the 2.4 Puma engine which has a GTA2052V variable vane turbo: GARRETT turbos for Land Rover passenger cars and vans - Applications - TurboMaster (http://www.turbomaster.info/eng/applications/passenger_cars/land+rover/)

[voltron]

I have heard there is somebody in sydney who tunes the 2.2. Does anybody know of his name. I don't really understand why it can't be done in Oz otherwise. No doubt they have more experience with the defender and probably more demand in the U.K.

Australia has alot of good tuners in the petrol scene, some say up there with the best but surely there must be someone in Oz that has had a crack. Im not sure I could handle the down time sending the ECU all the way to the U.K. But if that is my only option then I guess that is what will need to be done.

Cheers

[superquag]

and break your driveline piece by piece:p

Do what Land Rover should have done years ago, specify a stronger driveline, appropriate to the bigger engine they should have...:mad:

[n plus one]

Egr should always be shut at full throttle and have no effect on egt there.

Yeah, should have been a bit clearer in my previous post - again, I haven't yet got my EGT monitor in place so this is all based on others' experiences.

In theory an EGR should reduce EGTs, but doesn't seem to be the case in practice?

May simply be that remap improves EGTs in net - someone with a standard map with the EGR disabled may be able to provide a bit of data?

[Bush65]

I have heard there is somebody in sydney who tunes the 2.2. Does anybody know of his name. I don't really understand why it can't be done in Oz otherwise. No doubt they have more experience with the defender and probably more demand in the U.K.

Australia has alot of good tuners in the petrol scene, some say up there with the best but surely there must be someone in Oz that has had a crack. Im not sure I could handle the down time sending the ECU all the way to the U.K. But if that is my only option then I guess that is what will need to be done.

Cheers
Best chance would be Bruce Davis of Davis Performance Landys at Annangrove.

While the tuners were able to swap remaps easily with the earlier engine management modules, the OEM's have taken steps to prevent remapping.

And so far for the module used on the 2.2 the tuners haven't been able to come up with a solution that enables the vehicle owner to swap remaps, put the original map back in when the vehicle goes in for service or warranty, then put the remap back in afterward.

You should be aware that remapping will cause issues for warranty work, and will also cause issues if the dealer reads your module or installs a software update. This wasn't a problem with the 2.4, but is stopping most from doing it to their 2.2's if still in warranty.

[Lagerfan]

.I'd have been to see him by now!

Out of interest Pickles are you keen to get this done on the new truck? I mean I know all the benefits etc. but as a fellow MY13 owner I'd be very reluctant to do it before my warranty expires.

Can also confirm that 100% load sees the EGR flow go to zero (closed) on the stock motor.

[Pickles2]

Out of interest Pickles are you keen to get this done on the new truck? I mean I know all the benefits etc. but as a fellow MY13 owner I'd be very reluctant to do it before my warranty expires.

Can also confirm that 100% load sees the EGR flow go to zero (closed) on the stock motor.
No, it'll be a while, if ever, before I touched the engine, but I do like to suss out what's available. In the UK there's squillions of options & expert shops etc, but very few in Aus.
So yes, I do like to know about this stuff, keep up with what's out there etc, so that if I ever did decide to do something, hopefully the knowledge I've gained would help me to get what I want.
Cheers, Pickles.

[Dougal]

Can also confirm that 100% load sees the EGR flow go to zero (closed) on the stock motor.

I haven't seen the Puma engine code, but every other engine I have shuts the EGR at full throttle.
If it didn't, power and torque would suffer hugely.

[Lagerfan]

If it didn't, power and torque would suffer hugely.

Yes I guess that's exactly what you would expect it to do thinking about it.

So if you blank off the EGR valve without doing a remap, wouldn't that potentially cause problems as the ECU is expecting X amount of EGs and adjusting all its other parameters accordingly? Or do you have to also fool the electronics when blanking? Pardon my ignorance!

[Dougal]

Yes I guess that's exactly what you would expect it to do thinking about it.

So if you blank off the EGR valve without doing a remap, wouldn't that potentially cause problems as the ECU is expecting X amount of EGs and adjusting all its other parameters accordingly? Or do you have to also fool the electronics when blanking? Pardon my ignorance!

To shut-down the EGR you need to get into the ECU and find the bytes that switch in on/off. It's a job for a sharp tuner. Lots of blunt tuners around who don't know and try flattening maps etc with more work and not as good results.

Blanking it may or may not throw an error code. But once shut-down in the ECU it's closed permanently and doesn't need blanked unless the valve is damaged.

[forgottenpoppy]

That's certainly true on the TD5. But this thread is about the 2.4 Puma engine which has a GTA2052V variable vane turbo: GARRETT turbos for Land Rover passenger cars and vans - Applications - TurboMaster (http://www.turbomaster.info/eng/applications/passenger_cars/land+rover/)

Yes I know, I said I meant the variable geometry turbo. Over here the upgrade turbo is called all sorts of different things, by all the different companies who supply.
So I said I left my turbo as standard on my puma engine.

[VladTepes]

Increase the bore / stroke ?

Well LR decreased one of them going form the 2.4 to 2.2 andthe 2.2 has slightly more power, go figure.


The cheapest solution for you is to drive a Tdi for a while and then get back into the Puma it will feel like a rocket ship !

[Pickles2]

During magazine reading I noticed that the following companies offer "tuning" for the Puma, evolve technik, tunit, dms automotive. (All small case as per website!)
Don't know anything about any of 'em, except I reckon they'd all only offer a "generic" tune, not something particularly tuned to your particular vehicle, some of them may also be that "piggy back" style box that tries to "overide" the standard ecu?
Cheers, Pickles.

[voltron]

During magazine reading I noticed that the following companies offer "tuning" for the Puma, evolve technik, tunit, dms automotive. (All small case as per website!)
Don't know anything about any of 'em, except I reckon they'd all only offer a "generic" tune, not something particularly tuned to your particular vehicle, some of them may also be that "piggy back" style box that tries to "overide" the standard ecu?
Cheers, Pickles.

I've only ever dealt with piggyback style systems in turbo'd petrol cars. And in my opinion I feel this is the best way to go as there is so much flexibility in the tuning. You can save various types of tune. Economy, power etc.

This was the way I was thinking of possibly tuning the defender. Most systems come with a hand controller that monitors all systems as well, so you can display them in real time. I'm just not sure if anyone has been able to hook one up to a defender without issues.

[Dougal]

I've only ever dealt with piggyback style systems in turbo'd petrol cars. And in my opinion I feel this is the best way to go as there is so much flexibility in the tuning. You can save various types of tune. Economy, power etc.

This was the way I was thinking of possibly tuning the defender. Most systems come with a hand controller that monitors all systems as well, so you can display them in real time. I'm just not sure if anyone has been able to hook one up to a defender without issues.

The piggy back tuning boxes for commonrail diesels unfortunately aren't anywhere near as good as petrol piggy back computers. They simply plug into a few sensors and fool the ECU into giving it more fuel.

In doing so they bypass pretty much all the engine protection in the ECU.

[Pickles2]

The piggy back tuning boxes for commonrail diesels unfortunately aren't anywhere near as good as petrol piggy back computers. They simply plug into a few sensors and fool the ECU into giving it more fuel.

In doing so they bypass pretty much all the engine protection in the ECU.
That was my impression.
Pickles.

[voltron]

The piggy back tuning boxes for commonrail diesels unfortunately aren't anywhere near as good as petrol piggy back computers. They simply plug into a few sensors and fool the ECU into giving it more fuel.

In doing so they bypass pretty much all the engine protection in the ECU.

Ok, guess that is out of the question then as well.;)