Thread: 3.9 V8, next step to find some cheap extra power?

Originally Posted by LRCounty

Bosch gen 111 19lb injectors are what you want. They don't have clip slots like the Disco originals, so a second o-ring needs to be put in the higher groove at the bottom, to stop them dropping out of the fuel rail when under pressure.

Cheers
Andre

Thanks, I was having a look around last night and found this on an american Land Rover Forum, the guy put them in his '97 disco.

When it comes time to replace fuel injectors, ideally we'd use Bosch Gen 3 injectors for their superior fuel atomization and spray pattern. However, most have stuck with the Gen 2 because the Gen 3's lack the injector rail clip notch to safely secure the injector and keep it from sliding into the intake. After much research though, I found a Gen 3 injector, normally used on certain Volvos, with the correct clip notch, EV1 connector, resistance, and flow. The Bosch 0280155746. After ordering and testing a set of these, I found they not only work, but work great. They fit perfect and I noticed improved idle, throttle response, and power.

Looks like the way forward!

Whilst an engine swap would be good it is definately more work than I have the money/time/patience/space to take on at the moment!

I plan on keeping this car for a long time so probably will end up replcing the Rover V8 with a hydrogen/electric/hybrid/fusion/solar powered thrust module in 20 years time when petrol is $13 a litre. Although the hover tyres might make 4wd-ing a bit too easy.

I agree, get the WOLF working well.

NB** Pod filters are rubbish!

On the timing side of things, I run 14 deg BTDC on my stock 3.9, It loves it! Back in the dealerships we never went past 6 degrees, or 9 degrees on an LPG car, but mine loves 14!!

Also look at a plenum spacer to inrcease the closed volume of the plenum chamber.
You can also get larger throttle body grafted on you plenum chamber (top inlet manifold cover thing..) or be lucky enough to find a "Vitesse" dual throttle body inlet plenum from a Rover SD1, but they are pretty rare!

These will really take advantage of that new cam you are considering..


Or a 4.6 short motor

Hi Jitterbug

I've got a set sitting on the shelf, if you feel like picking them up pm me.

Cheers Jhonno

Originally Posted by 98 LS

I agree, get the WOLF working well.

NB** Pod filters are rubbish!

Yep, the pod filter willl be gone as soon as I work out what I am doing and get the raised air intake sorted. I will just use a common filter box and paper filter, something cheap that I can get replacements from repco etc easily.

In my serching and musing I have stumbled accross an Eaton M112 off a XKR, refurbished for $500. I know there are some horror stories out there warning against supercharging but the problems seem to arrise with underspecked blower and standard ecu/map starving the rear cylinders of fuel.
With the gen 111 injectors and some time on the dyno getting the wolf retuned I am thinking I would be fairly safe.

Any thoughts on this?

What other than intake manifold, pully, bracket and belt would i need?
(i know finding the manifold and braket is easier said than done but there are a few around).

It seems if i am going to splash the cash on dyno time, i might as well make it worth while!

Then maybe one day i can go for a 4.6+ bottom end too really liven things up!

Any thoughts on this?

Well I have thought quite a bit about How I would do it.( but I won't of course) .
IMHO, the only way to guarantee a good distribution of fuel would be to get either a 4 barrel manifold, or mod a stromberg manifold, by cutting the top off and fitting the supercharger outlet to the matching hole. the "spider leg" pattern of these manifolds would ensure better fuel distribution, than one small outlet on a sandwich plate over the 8 holes of the standard lower manifold.
You would have to drill the manifold for injectors and fab up a rail , but that is probably the least expense you will have seeing you will have to get a throttle body, high pressure pump, maybe larger fuel lines etc etc .

IMHO, if you are thinking of forced air, 2 small turbos would be better. AFAIK you can get subaru or similar turbos second hand . I reckon , if you then got old single outlet manifolds, you could make adaptors for turbos out of boiler pipe. While it would take more pipework, there would be far less expense in fabrication involved as you would just stuff the air into the current throttle body with no mods to rails etc , maybe other than bigger injectors, and the Wolf could control advance based on a MAP sensor, and could easily control fuelling. That is if the Wolf controls timing. If not you will have to buy lots more hardware.
Regards Philip A

Originally Posted by Jitterbug

I will just use a common filter box and paper filter, something cheap that I can get replacements from repco etc easily.

go for VN - VS commodore air box. This is a common fitment to LPG Landy's, well was in the early 90's LOL!

And you can just about get these filters at 7 - 11

Would something like a vortech supercharger be better? Has the adavantage of keeping the current throttle body etc but with the power from idle.
The project is as much 'something to do' as anything so dont want to spend a fortune.

ROVER V8 ENGINE TVR EFI SUPERCHARGER EATON M90 INDUCTION KIT | eBay

This auction has eneded but a kit like this solve the fabrication problems. I would only look to run the system at fairly low boost so hopefully the standard fuel system with upgraded injectors will be good enough. If not it would become clear when it goes on the dyno and i can sort it