OK, I already know that it is not the way to make the most power, but I'm not looking to compete with BOOSTD7 and the others.

I have an 89 turbo unit on the way to me that i will be dropping in my 87 TII. I already have fuel mods, etc to ensure a good air/fuel mix. My question is, "What have some of you done/would you do to upgrade this turbo to provide enough flow for approximately 350-400 FWHP? I've heard of a couple people that have done it, but I don't know what A/R, wheel sizes, etc they used. To be honest, I don't understand what they all mean.

Anyway, all opinions are appreciated!

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87 TII
Weapon R intake, 2.5" mid/downpipe, Apexi N1 single, some other stuff

 

The best you could do with the stock turbo is about 300 RWHP, which is close to 350 at the flywheel. You would have to do something like what Turbonetics does. You would also need all of the usual mods, such as the fuel system, exhaust, intake, and IC.

 

OK. But what exactly is it that Turbonetics DOES? I'm just trying to learn what all the acronyms and terms mean, as well as find out what I should get. Thanks, 13!

 

you'll be wanting something like a T04B, 0.96A/R exhuast housing p trim wheel, 60:1 compressor and a 0.60A/R compressor housing, run about 15psi boost.
you'll also need an aftermarket engine managment system, intercooler, bigger injectors (or more) fuel pump etc

 

They add a TO4 compressor and they clip the exhaust side. Then they balance everything.

 

to which i might add, if you get that same To4 compressor and mount it on a true T04 exhuast housing (that flows the exhuast gas that a 13B needs) you will pick up somewhere around 60-80HP. if you are wanting 300fwhp by all means go for a hybrid, if you are wanting 400fwhp get a T04

 

is this a safe thing to do? im getting a hold of a gtx turbo and i was going to get it rebuit with t04 compressor and a buddy told me that the exhaust side would suffer and cause detonation, why is this? wouldnt water injection help counteract this. id like to run 12-14psi occasionally

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[This message has been edited by rx7passion (edited March 16, 2001).]

 

The problem with the GTX and GTR turbo's is they cant really flow enough exhuast gas, the more you try to blow into the engine, the more this becomes apparent. the GTX exhuast housing is better than the GTR one but it is still restrictive, with a T04 compressor wheel and 10-12psi boost when combined with intercooler and fuel system uprages (ECU of some sort) it should be good for 280-300HP, you may be better looking at the turbo from a SW20 3SGTE MR2, as they are the turbo's on them are good for 330HP at 12-15psi boost when put onto a 13B engine.

 

HWO, if you use the turbo from an MR2, you'd still end up with having to have a custom manifold made, as well as new oil lines, etc. . . That kinda defeats the purpose of going with a hybrid (straight drop-in)

 

I've been wondering this myself. Whats the best turbo upgrade for a T2? Intercooler, Turbo kit, Fuel upgrades ect..

 

thats honestly a weak excuse, what it comes down to is do you want HP and engine life together to dont you?

 

I don't neccessary agree with this combination but this is the best way I've tried when using the stock turbo components.
First you have to upgrade the compressor to a TO4B with a SUPER H OR V trim compressor wheel.Next for the turbine section you have to machine the turbine housing to accept an O-trim turbine wheel.
This setup usually gives major boost creep headaches with the 87 to 88 turbos because of the restrictive wastegate set up from factory.I have not tried it with the 89 and up turbos but they do have a better wastegate set-up though.
Honestly you would be better off with a custom turbo,wastegate and manifold but it's your choice.

crispeed
87TII
9.74@139mph

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[This message has been edited by crispeed (edited March 17, 2001).]

 

Damn bringing this back from the dead. Ok well what if you use an external wastegate? That should solve the boost creep problems, right? And what kind of power could you get with the turbo you speak of? What I really want is mid 12s. Can it happen without a whole different turbo?