How much HP could u gain from adding 4 more psi on a stock t2?? What turbo is the 87 TII equipped with?? TD05?

You'd have to have a fuel cut defenser first.



Turbo is a Hitachi HT18.

as longs as we are on this subject; What are the difference between the s4 and s5 stock turbos? And can u put them on different blocks? ie s4turbo on s5 block.

Turbine housing, wastegate design, and manifold. If you want to swap one for the other, you need the manifold for it.

ok, well what about in terms of power delivery are they about identical?

Stock for stock its pretty close, but if you pull the twin scroll flapper out of a S4 manifold, the S5 one shits all over it (S5 ones are fully divided).



My old car had a clipped turbine wheel and removed twin scroll, full boost didn't come on until almost 4000 RPM!



But it felt like it had a lot more power than it really did because it all came on at once https://www.nopistons.com/forums/pub...#>/biggrin.png

So how much HP can be expected just by adding 4 lbs of boost?? no fuel upgrade

possibly a blown up engine

Hmm.....so ur saying increasing the boost to 8 lbs will blow the motor without fuel upgrades?

I run 10psi fine. Car runs a little rich, but its fine. https://www.nopistons.com/forums/pub...IR#>/smile.png I dont have any fuel upgrades yet.

you said add 4 lbs, unless I am wrong, don't TII's run 7 lbs of boost stock? that would put you at 11 lbs, add in possible boost creep, and no fuel upgrades, and boom, and in order to get past 10? at all you need an fcd (damnit, I need a turbo)

stock they push 7lbs, i know, i ahve the same car hes asking bout ^_^

My buddy blew his engine with just full exhaust/intake he had an FCD too. I told the idiot to atleast rewire his fuel pump. he didn't learn i guess..

Anything beyond 10psi and kiss your apex good bye.You need a pump and injectors to run beyond 10.The most I would push the stock turbo to is 14 before I would look at replacing it.Damn I need a T2 driveline. :smirk:

got mine up to 15 once... just ******* around. Only did it once... fuel cut didnt kick in and it went to 15 right when that happend i shut it down and turned the boost back down.

why does your sig say NA then? you're confusing me.

didn't he have a 10thAE too? gee i wonder what he did with it.....with his new kids on the way.? :smirk:

cuz at the time i was under the impression it was TII.

when my cars all done im not gonna push past 10psi on the stock turbo and IC. Even with my haltech and more than enough fuel.

What kind of boost do you think would be possible in a series 4 TII with a microtech, bosch motorsport fuel pump, high flowed turbo and stock cooler??? It has also been fully rebuilt 4k kms ago...

well its not a good idea to run 10psi on the stock intercooler, unless for short burst u could run up 14psi. I can't tell u what kind of boost your talking about, what kind of turbo does it have? need more info. even if u have enough fuel, high temps will still make u blow.

I'm not too sure on the specs of the turbo, but it is a high flowed series 4 turbo. I haven't actually picked up the car yet (I'm buying it) so I'm not sure.