wrxbart

iTrader: (5)

Building a 2.35/2.4 at the mo,usual forged rods,pistons,acl bearings,mod oil pump,ported/polished sti4 heads,reprofiled cams,ej22t block,ej257 crank,front entry manifold,740cc injecters,simtec.got gt spec 2 headers,bosch 440.
whats the best direct fit turbo?looking for 550 as twisted is expensive?
cheers

stevebt

iTrader: (8)

your going 2.35 but you think rotated is expensive ??? You do realise going for 550bhp is going to be expensive either way. Shaun has had some good results with AET turbo's and there is also good results with the MD321t+ and the FP red.

dazdavies

iTrader: (22)

MD321V is the lastest carnation of Mark's (Lateral) Turbos. I think its currently in testing but its capable of well over 500bhp and is in the standard position. Might be worth giving him a ring.

Scoobyslammed

MD321T worked awesome on my old Type R... Check my rebuild thread out...
Bolts in standard position aswell

wrxbart

iTrader: (5)

Already got most parts to go 2.35 and at good prices,got a md321t at the mo but bit small for what i want.Just wanted peoples views and im keeping an eye on the 321v to see how it goes .

Old engine will be for sale soon aswell.
CDB
Toda pistons 2016cc
forged rods acl bearings
Sti4 heads complete
md321t
just won the Nottingham sports car club sprint championship with it,4th scoobyshoot out handling circuit,only done 1800 miles in2 years and run on motul 300v oil changed every 2 events.

Shaun

wrxbart,
500bhp is not a given with a standard fit turbo, let alone 550bhp.

I have tested a couple of AET standard fit turbo's, with the last one achieving 440bhp / 470lbft at the hubs on one dyno and 530bhp / 550lbft at the fly on another dyno. Based on previous Dyno Dynamics runs, this equates to a DD flywheel in excess of 500bhp. All in all a 500bhp turbo. This was running 1.7bar @ peak boost / 1.6bar @ peak power and on pump fuel, but was on a built Cosworth 2.5L engine..... not sure what would be achieved without my AVCS heads and cams though.

This turbo is now being replaced with another AET turbo that has a different core and a bigger exhaust housing, since the last exhaust housing was too small and the power was flat lining quite early on (due to restricted exhaust flow). In theory, the new turbo should produce a bit more power...... especially with an extra wedge of boost. I will know over the coming weeks when we get it on and mapped again.

dynamix

iTrader: (3)

MD321V

stevebt

iTrader: (8)

It would probably be sitting where mine is at 500bhp Thats sti5 heads for you

Shaun

Steve,
I wasn't aware that non AVCS heads reduced power much, as it was mostly down to better spool using AVCS.

I have no data regarding my cossie AVCS heads/cams, versus standard AVCS heads/cams, but perhaps that is where my higher power figures for the turbo spec are coming in to play (for the boost that I run). The only info I know is from Engine Tuner that has seen same power outputs on the Cossie heads/cams with a lot less boost.

I thought you had the AVCS heads back now?

stevebt

iTrader: (8)

Shaun the car is away now hopefully getting them fitted soon with new rods for bigger power, uprated cams and uprated valves. in other words a waste of cash

Shaun

roflol

You spend more cash and "it" spends more time off the road. Tell me about it!!

I wish at times I had left the 2ltr engine in and been happy enough with around 370bhp.

stevebt

iTrader: (8)

But at least now you can admit just how slow the hybrid twin scroll turbo is

wrxbart

iTrader: (5)

How is this performing on yours?

scoobytyson

Well done mate on winning the NSCC overall title , looks like its going to be even faster next year then

dynamix

iTrader: (3)

VERY nicely thanks ... initial dyno run showed 490bhp & 490 lb/ft without too much issue but there is more to come and will be on the dyno hopefully tomorrow to see it at over 500 of each.

wrxbart

iTrader: (5)

Cheers mate, it hopefully will be if i get all the bits sorted.

wrxbart

iTrader: (5)

Will you keep me posted with updates on this and let me know how its going,what engine you running?

stevebt

iTrader: (8)

he is updating it on a thread on 22b

dynamix

iTrader: (3)

Just waiting on a dyno run at zen to prove the figures at present but delta-dash shows 32whp more than when the 490 flywheel bhp run was done. So looking good for 520+ of each.

Shaun

Sounds promising Duncan.

I look forward to the results.