How Much Boost?

#1 I was wondering how much boost/hp/torque/etc a stock mkII turbo car can handle;i.e. engine load, tranny, lsd, cv axles.

#2 Whats the difference of the SW20 3SGTE GEN I,II,III, IV engine; higher boost? larger t/b, higher compression?.


#3 Which one has the twin entry turbo? Do you think i should swap out my stock mr2t for an entire SW20 3SGTE gen IV rear clip ($5500)? Or just build the stock one up for Street/track(not 1/4's)?

thanks

i can answer sum or ur questions

my boy had a 2gen mr2 turbo
he ran it wit 7psi daily driven and went up 2 14psi 4 racing

but if he ran 14psi all da time da cay would act up n parts wil go cause it had 140k.

You can run 11 lbs of boost all day in a 1993 Turbo without any other mods. Fuel cut is about 11.8 lbs on the '93 and I think 9.8 on earlier years (not sure though). With this boost level and intake & turboback exhaust you'll be a little over 200 HP or so to the wheels. With a BCC or the like and a proper running mechanical car, you can run 14 lbs max in the stock turbo/intercooler config (reliably). Chang the turbo/intercooler/clutch and the rest of the car's drivetrain can handle about 300HP to the wheels before stuff starts breaking.

If you're starting from a mechanically sound turbo model to begin with, you'd be INSANE to spend $5,500 on a clip. There are lots of things you can do with $5,000 or less on a 2.

Actually the boost cut is at 13.5 i believe on 91-93 MR2 Turbos
:rocket:

Originally posted by NEED4SPEED


#3 Which one has the twin entry turbo? Do you think i should swap out my stock mr2t for an entire SW20 3SGTE gen IV rear clip ($5500)? Or just build the stock one up for Street/track(not 1/4's)?





There is no such thing as an SW20 3S-GTE Gen IV rear clip, as Gen IV 3S-GTE's NEVER appeared in SW20 MR2's. Your best option would be to get a rear clip from a 94+ JDM MR2 turbo, as it will have a Gen III 3S-GTE, which is a fair bit better than a Gen II, as it has a MAP sensor (no flapper type airflow meter), a CT20B turbo (not CT26), along with various other differences.

I have 192,000 miles on my 3sgte engine (unopened) and I run 16 psi of boost on the street and 20-22 psi at the track.

This is out of a custom T3T4 turbocharger.

Fuel cut is 12 psi on 91-95 US model MR2s.

Go the Gen III (oct 1993 UP) if you can...WORLD of difference. My STOCK Gen III is quicker than my modded Gen II which was running 14psi plus a few other bits. Gen II's a good version BUT IF you wanna go long term go the Gen III.

Cheers
KiwiMR2

Oh and fuel cut on the Gen III is about 18psi...stock they run 13psi.

Cheers
KiwiMR2