Power gains

[caine]

What sort of power gains would i be looking at gaining (if any) with these modifications to a standard R5 turbo engine, also roughly what will each mod gain in hp

jap style back box 4inch
straight through exhaust pipe
Front mount intercooler
group a carb
Gasflowed alloy carb inlet elbow
greencotton air filter with cold air feed
bigger bore 2.5" stainles steel turbo downpipe

thanks

[Ash-Lee]

Not a lot, if anything you will probably lose power if your fitting a larger intercooler without raising the boost.

Quickest way to get a bit more power is just turn the boost up to 0.8BAR (12psi), this can be done without any other mods, doesn't take that much to run at 1.0BAR either and that will definatley be noticable.

[Arturas-zender]

and what power should I expect to raising up boost for 0.8 bar  :wink:

[caine]

and what power should I expect to raising up boost for 0.8 bar  :wink:

thats my next question....

also what needs to be done for it to be able to run 1.0 bar?

and...with them mods, what sort of boost will i need to get good power gains

thanks

[5teve L]

With the grp A carb that will fuel enough for 1 bar boost, it's the fuel that needs sorting to run over a bar & a bigger turbo.
Thing is the group A carb isn't ideal as it just overfuels all the time off boost, if you are confident in stripping a carb down you can rejet it yourself, it isn't that easy though if you aren't mechanically minded.

With those mods & a bar boost i would reckon to see around 150bhp, give or take.A bigger turbo would see a slight gain at the same boost.

[caine]

With the grp A carb that will fuel enough for 1 bar boost, it's the fuel that needs sorting to run over a bar & a bigger turbo.
Thing is the group A carb isn't ideal as it just overfuels all the time off boost, if you are confident in stripping a carb down you can rejet it yourself, it isn't that easy though if you aren't mechanically minded.

With those mods & a bar boost i would reckon to see around 150bhp, give or take.A bigger turbo would see a slight gain at the same boost.

whoaaa really, i wasnt thinking that much! if i go to 1 bar boost though 14psi? or 14.7, dont i need an uprated gasket?

[Arturas-zender]

GTTBoy , are you running T25 turbo ? is it from 200sx S13 ?

[5teve L]

GTTBoy , are you running T25 turbo ? is it from 200sx S13 ?

I'm not sure what its off, it has a .48 front & a T25 core with a .49 rear housing, i forget the wheel sizes now though.
It will make around 250 bhp i think on a GTT engine, but that would need about 25psi of boost, prob more.

[Arturas-zender]

ok thanx for info