what is needed to get to that power on a version 8 type uk sti? thanks

 

Id say fuel pump, injectors, 3" turbo back exhaust, choice of turbo and a remap should see around that depending on what turbo you use.

 

Clutch??
450 mark maybe a cooler, although they do run 400odd on the top mount..

 

to see what i already have on the car view my scooby. what turbo do you recomend and what size injectors? thanks

 

In the next few months I will have the following on my car, and should be getting around 420-440bhp according to JGM.

3" Full de-catted Stainless Exhaust, including up and down pipe
K&N Cold Air Intake
Walbro Fuel Pump
HKS Fuel Pressure Regulator
ECUTek Remap by Scoobyclinic
Dump Valve

Hybrid FMIC
750cc Injectors (flow matched)
Apexi AVCR
MD321T
Tubular Headers with matching up-pipe
JGM Remap

 

i see thanks. what bar boost are you running atm with the scooby clinic remap? thanks

 

Haven't a clue mate. I bought it already mapped, and don't have a boost gauge, and the AVCR isn't wired up yet.

 

What is your current torque? What are you expecting it to go up to?

 

What power can the pistons & rods take on the new-age cars folks?? 500?

 

opinion vary, i wouldn't go more than 400 without a rebuild with uprated internals, but there are some folks risking it, some get away with it, some don't

 

As above, there are some which have been o.k up to 500 but I think 400 is the safety limit after that you are on borrowed time, I have a piston with a broken ring land from an STI8 that was running 420bhp for 10000miles.

Pictures to help you make your mind up

 

Not sure on the torque JP4. I'm expecting it well below 400 though

My next stage once I've around 420bhp is to go forged at the end of the year. But think it's safe risking it at 420.

 

very interesting.. I am not aware of any doing this with upto 440bhp..

there are other reasons a ringland could do that.. depending on how it was mapped the reaction to changes in fuel quality are setup etc.. were there any signs of det on the heads or top of the piston?

As a summer side project to my classic I am planning to run an sti03/04 on standard internals at different stages to see exactly how far it will go as I will have a built 2.5 bottom end sat waiting to go in it when it breaks current thoughts on a 400~450bhp turbo 1.7bar is fine as a peak.

Simon

 

ryt i see so i think itl have to be a rebuild.lol how much would a rebuild cost to support up to 500bhp? thanks

 

Not saying all will do this but there are two different ends to the spectrum, and this Piston obviously fell at the lower end, the LH head did look slightly burned but no det to speak of on the piston.

 

Have a look at my profile, it made 400/375 on vpower & 10% methanol. That was with a few manifold/wastegate issues! Should get better results once manifold is changed and simon has remapped it.

 

This is a brief spec of my engine running at 420BHP

2.0ltr STI 8 SCOOBYCLINIC CONVERSION , SC46 TURBO & WASTEGATE ,550cc INJECTORS, FUEL LAB REG, GFB DUMP VALVE, AUTRONICS SM4 ECU, E-BOOST 2, GEN GT SPEC 2 HEAT WRAPPED HEADERS & TURBO UP PIPE, BALANCED EXEDY TWIN PLATE CLUTCH & FLYWHEEL, PPG STRAIGHT CUT QUICK SHIFT GEARBOX, FULL RCM EXHAUST SYSTEM, SCOOBYCLINIC DECAT DOWN PIPE , FMIC, ALLOY RAD, SCOOBYCLINIC OIL COOLER,

I would need bigger 740cc injectors & another map to reach 450hp and maybe another turbo cos i think id be maxing the SC46 at that power, would love the MD321T or the SC50

 

A bloody lot...

Seriously, what,s your aim with the car?? i.e road car, track, etc, or are you just number chasing?? i don,t mean that with any disrespect either, 400bhp makes a very nice responsive car, when going for 500 it,s a whole new ball game, trust me i,ve done it with a cossie and an Evo and spent ££££££££££££....

 

have to go with pete on this one.
assuming you get the right combination of parts the first time, are you really gonna feel an extra 10-15 brake?

 

Based on your profile a 321H and AVCR boost controller with the 650cc injectors may do it.

 

Completely agree Simon, I haven't seen a version 8 do that either and we run 4 at over 430bhp on stock internals. These carry out many duties including RYWB and track days and have been the same spec for getting on 2 years now.
Re your STi 8, go on put a V on it, I am curious to see what it will be like on a 2 litre and whether it will crack 500hp on pump fuel.

 

im running about 410.


view my profile for spec.

 

Well it hasn't cracked it on a built 2.5, so do you think it will do it on a standard 2ltr.

BTW.... give me one of your 2.0ltr standard engine builds running 450bhp on stock internals and I will bust it for you! Unless it has a powerband of 1k rpm and a rev limit of 7500rpm.

 

Why pick a number, I had a budget in my mind, and only missed by £1000, but did add the parallel fuel rail mod to the list.

I've crawled up past 340 bhp and at 43,000 miles my std clutch cried enough, changed on Monday to allow the JGM to do his laptop magic.

HTH

dunx

 

you can use mine if you pay for the rebuild.

 

jd5217,
That is not very appealing to me! I have my own engine to sort first! lol

 

well I have something to aim for with my RCM build

 

Which bit?

May the boost be with you!

 

anything over 450 starts getting very expensive - consider that step wisely because the benefits do not outweigh the costs on the whole.

tis fun though

 

nice car and spec at 410bhp is it quick? just wondering