hi all.

G'day guys I'm new so i thought i'd chuck a post up. I've got a '90 MR2 GT with a few mods and somewhere over 220rwkw. normally in tas but i'm in Melbourne for work at the moment. boosts coming in a little late but its tuned soft to look after the gearbox... think i could use a smaller a/r turbine housing ...and its only running 14psi and stock cams.


 

welcome

soz. specs. The dyno run is a little bit iffy cause it was pretty heatsoaked and was pulling a lot of timing, and the dyno might be reading low... i wouldn't be surprised if it's more like 260rwkw on the street... but it's a long story.


1990 Toyota MR2 GT (JDM)
TRD quickshift kit
TRD ignition leads
Momo Race wheel (280mm)
(King Springs SL springs
KYB custom SL shocks - soon to go)
KW V3 coilovers - to be installed
Eurobein Alloys 16X8.5r 16X7.5f
Bridgestone Potenza GIII/adrenaline.
Rebuilt 3S-GTE engine
Bored, polished balanced etc.
JE Forged overbore pistons
HT duel ceramic coating on pistons
Total Seal Gapless Rings
King main bearings
Clevite 77 rod bearings
ARP head studs
ARP rod bolts
ARP main studs
ARP flywheel bolts
Spearco intercooler kit
Apexi FIP air inlet kit
Kirkasaurus semi-solid engine/transmission mounts
twosrus brass shifter bushings
twosrus engine bay gas prop
(Custom 5 puck solid hub clutch
Custom clutch pressure plate - GONE)
Excedy sprung hub 5 puck clutch and pressure plate kit.
HT coated valve cover - Satin Black
Toyota genuine parts - replaced every other moving part or seal in the engine and gearbox.
Berk 1-2 straight through 3" stainless exhaust with dual 4" tips
Haltec E11v2 ECU
Haltec MIL-spec Loom
removed AFM and replaced with MAP/MAT sensors
installed Haltec closed-loop boost control
Sard 800cc side feed injectors
modified fuel rail, twin feed with
remote Turbosmart fuel regulator
Garrett GT3076R turbo
custom fab exhaust manifold
Tial wastegate (external)
custom fab 3" downpipe (removed primary cat)
custom fab intercooler piping.
modified T-VIS actuator("top secret space shuttle parts")
'93+ E153 transmission and viscous LSD. (Toyota Japan built one for me)
AVO blow off valve  (dual port - dependant on pressure)

will try find a pic but its not pretty lol. stock fuel pump. the motors pretty understressed at the moment, 14psi is easy, stock pump is keeping up for now and it can still run rich up top, the restricting factor is the cams over 6500rpm i think, but the factory cams get me great fuel economy so the engine overall ends up being a nice package. if i was going to change anything i'd consider the cams and a smaller turbine housing for quicker spool...

without gettign into it all too much, and without trying to sound like i'm making up numbers lol, when the power run was made the car had been cooking on the dyno all morning with no fan on the intercooler, so the intercooler wasn't doing much and the engine was pulling a lot of timing (10deg) cause of the inlet temps. (80 degrees C). also the dyno seemed to be reading about 20-25rwkw low. we put 3 degrees of timing back in and made 10rwkw with the hot inlet air. optimistically it's already making 270kw, but i want to put it on a dyno again when its fresh and not too hot.

$5500.

yeah i've thought about w2a but the spearco one generally works alright....just not so great stationary on a dyno for hours of tuning with no air flow lol.

you reckon an mbc would build boost faster than closed loop boost control on the haltec? the haltec set up made a huge difference over stock with the ct26...

from Launnie. i havent tried playing with the duty cycle.... but i know when it got tuned the machanic said he could get more bottom and mid range easily if i wanted it, think he just wanted to go easy on the gearbox after i chewed my last one. noticed your boost comes on really well. but 2.2 stroker and the 71mm compressor has to help... what turbine a/r are you running? i'm guessing a .63... i have a nasty feeling i've got a .82.

i really need to learn more about duty cycle for boost and idle control.

been thinking about using an e-boost2, would that control boost better?

That's a nice list of mods!
My engine build is almost finished with the same turbo as yours, I'm looking forward to seeing the results.

On the topic of boost control, I've never understood why people use a separate EBC if their aftermarket ECU can already do it. Boost control isn't trivial in general, but it is fairly basic in comparison to many of the other functions in a decent aftermarket ECU! You should be able to optimise the boost levels with the Haltech.