High power 2.5 graphs
 

Looking for 2.5 power graphs and specs, 500bhp+. What ya running?

Fully closed deck 2.5 with 14mm head studs, forced performance red turbo , ,forced performance 83mm inlet pipe ,,850cc injectors , teg sport FMIC , custom induction kit with RCM cone filter , classic 3 port , 531bhp @ 1.7bar , prob missed a few bits


https://cimg6.ibsrv.net/gimg/www.sco...652fb06dbb.jpg

Must be nice to drive :)

Yeah iv got it just the way I want it now and brings a smile to my face when I'm out in it :thumb:

Set on low boost

I can't be the only 2.5 over 500 surly ?

thanks for posting it up,

yeah it looks like it :S

i find it hard to believe by how many 2.5 cdb conversions are always ready for postage at ASperformance.
​​​​​​There must have been 20 there ready to go last time I was there.

I keep toying with the idea of a 2.5cdb with darton or aebs sleeves and gas ring heads to support a Borg efr 9180. Just need to persuade the missus :nono:

Did Steve Simpson map yours? I have a FP green on my 2ltr Bug and that gives a nice 440bhp and he maps mine when required.

From all the forged 2.5s I see most stick under 500 ,, only couple iv seen over 500 is Bob Rawles owns car and Matt-c on here

Gas ring heads on a 2.5 ? ,, as far as I know the gas ring conversion is only for the 2.0 as iv got one being built for my WRC build but haven't heard of them for a 2.5

Friend had the darton sleeves and had nothing but problems and ended up starting again without them

Lots of good mappers out there but from personal experiences I will only use Bob Rawle for any of my motors :thumb:

Don't forget frayz!

I was told by a lot of tuners to not push the 2.5 Forged engine to 500 bhp its very risky 450 bhp is the limited for them :thumb:

Depends on the block, mine is closed deck so i'm guessing OP's is as well

550 is generally the 'limit' to be safe. Built to a high spec as well of course, due to the thin liners on the 2.5 blocks

Standard block I'd be inclined to agree circa 450ish is a nice limit, going beyond that you want it to be pinned/closed decked and going 14mm studs defo helps

Somewhat old this one, built it years ago using the finest Cosworth had to offer at the time inc a linered block Billet crank, rods, pistons, CNC heads and an old school non billet GT35 0.63.

Attachment 26333

You got any of a s206 on a 2.5 with newage wrx heads mart ?? :thumb:

Maz

Unfortunately no, not a spec I've ever built.
Have done a 2.5 Classic on one again a long time ago so it would have been a Non Billet wheeled unit.

Attachment 26330

Meth map on this one, Vpower was 460 or there abouts.

Cheers mart , I got hold of an s206 with downpipe and massive inlet track at a good price so thought I would give it a whirl . Lol ! It's going on my classic rb5.

Will the wrx heads even be good enough to flow decent power for that turbo?

Some say 440 ish some have run 500 on stock heads and cams :wonder:. I do have a set of v5/v6 sti heads but that'll be for when I need a refresh to get them chucked on :thumb:
Mid 400,s I'm hoping for !!!

Maz

I'd spend the extra and get the v5/6 refreshed and put on tbh. Unless you have the wrx avcs to aid in spool?

Got plans for heads already . The spec of this engine was as is when I purchased the car so just trying to see what it can do as it is :thumb: .

Got plans for later.on in the year with the block and heads :D

Maz

v5 heads work very well on a 2.5

a recent 2.5 build of mine, mapped by bob rawle, the dip in midrange was due to a bit wheelspin as roadsurface was wet

ej257 casings with 10mm thick plated inserts (CDB) using stock liners + 14mm headstuds
non avcs heads, ported, kelford 272/264 cams
owens standard position GT35/82


https://cimg3.ibsrv.net/gimg/www.sco...1e533ddb22.jpg

Mine is also one of your closed deck builds Andy

:thumb: yeah , i built the engine in that hatch 330s a couple of years ago, just previous to you owning the car :) i can remember the car having low milage and very clean, nice motor