Thread: D3/D4 Power Upgrades up to 300hp on the tyres

Originally Posted by josh.huber

Chip or re map

This was a chip (on a 3 ltr diesel), so the fuel load would not have been adequately compensated for with an appropriate increase in boost.

However, it serves to highlight the dangers. Even with a bespoke remap, most tuners (even the good ones) are not targeting vehicle performance whilst towing 3 tonnes of assorted metal. You can ask someone like Pete Bell to take that into account, but you'll end up with a less aggressive mapping. I did this when I had my D3, and it was a reasonable improvement in driveability, but nothing spectacular.

I'd be wary of towing with a map that gives 300hp. Maybe with a setup like BAS or Superchips, where you can swap the map for towing duties.

Cheers,

Gordon

Yeah for sure, chips are dangerous things, bulk fuel dumpers at best! as you stated do nothing to control boost to keep temps on check, however the fact that you went into limp is a good indication that the ecu is watching. I'm definitely gunna get a egt and get a digital interface with alarm as I don't plan on watching the thing just knowing is there.probably mount under drivers seat with a long cable to read for curiosity readobs. After another phone call to roo he told me yeah we made 300 too but we also limped allot under load when pushed continually like a hill. That's why they have opted for 245 as a max but are happy to do any less I was thinking 225 for myself as they can still improve fuel economy with that lower maximum improvement. These forums are great for people to push around ideas and experiences. I tend to think the ecu max temp must be safe as all these tuning shops are all offering life time warrantys and insurance.

Originally Posted by Dougal

No. Exhaust size does virtually nothing to drop temperature.

Dougal Ill keep searching, but I have a website or article somewhere or maybe a book at home, that states that significant exhaust size does lower exhaust temps. As a much less restricted exhaust system aids in the scavenging effect on the engine (valve overlap and boost) allowing cooler air to flow over the top of the piston and through the cylinder. I think exhaust shops make claims to this in ways that make it unbelievable but. Yes it is true, looking around last night many shops won't remap without an exhaust upgrade.

By the way fellas while searching around in the net last night taipan exhaust is asking for a donor vehicle for a week and they will fit a 3 in exhaust to the car at a significant discount. They will also supply a car to drive around in. Sounds great

http://taipanxp.com.au/landrover-dis...ehicle-needed/ they are in the gold coast, seems we are a target for accessories finally

Josh - these chips (intercept boxes) are nowhere near as safe as a remapped ECU which when done correctly will alter all the fuel/timing/boost parameters.

All they do is take a number, substitute another value and return a number the ECU is expecting to see in return.

This is very different to changing all the values in the ECU (throttle, timing, pulse width, etc) and allowing the ECU to maintain control.

You sound convinced that you are going this route, so I wish you luck and hopefully it will all hold together for you.

The motorbike game does this a lot too (Powercommanders etc) but these are all intercept boxes that can change fuel to well outside operationally safe levels and the ECU cannot see these as they are masked by the box.

I have recently purchased software and hardware to reprogram my bikes ECU as opposed to a Box and so far the benefits have been enormous!

I can still run closed loop, change all parameters of ECU control but retain overhead limits safely.
The response is better and smoother and the power and response is better than prior

Originally Posted by josh.huber

Dougal Ill keep searching, but I have a website or article somewhere or maybe a book at home, that states that significant exhaust size does lower exhaust temps. As a much less restricted exhaust system aids in the scavenging effect on the engine (valve overlap and boost) allowing cooler air to flow over the top of the piston and through the cylinder. I think exhaust shops make claims to this in ways that make it unbelievable but. Yes it is true, looking around last night many shops won't remap without an exhaust upgrade.

There is endless BS about exhausts in print and on the net.
If you really want to know, then measure your current exhaust back pressure and see how "restrictive" it actually is.

Originally Posted by Tombie

Josh - these chips (intercept boxes) are nowhere near as safe as a remapped ECU which when done correctly will alter all the fuel/timing/boost parameters.

All they do is take a number, substitute another value and return a number the ECU is expecting to see in return.

This is very different to changing all the values in the ECU (throttle, timing, pulse width, etc) and allowing the ECU to maintain control.

You sound convinced that you are going this route, so I wish you luck and hopefully it will all hold together for you.

The motorbike game does this a lot too (Powercommanders etc) but these are all intercept boxes that can change fuel to well outside operationally safe levels and the ECU cannot see these as they are masked by the box.

I have recently purchased software and hardware to reprogram my bikes ECU as opposed to a Box and so far the benefits have been enormous!

I can still run closed loop, change all parameters of ECU control but retain overhead limits safely.
The response is better and smoother and the power and response is better than prior

Yeah for sure tombie I might not have written it correctly I hate chips totally against them like I said fuel dumpers. I'll go a low tune remap and egt alarm as stated. Yeah I have a 954 Honda love the bike until I ride a mates with a pc3 he added no peak power just smoothed it off with the pipe on it and it rode so beautifully compared to mine.