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

Originally Posted by 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.

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.

Originally Posted by n plus one

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.

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.

Originally Posted by n plus one

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.

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

Originally Posted by 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

They already have a variable vane turbo.

Originally Posted by Dougal

They already have a variable vane turbo.

But not a variable vein turbo

Originally Posted by isuzurover

But not a variable vein turbo

Is the biggest variable vein the Varicose?