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what boost can i run now??

qikr33

By qikr33,
in Engines & Forced Induction

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qikr33

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Posted

Ok fellas ,got are custom fmic, head has been off and fully rebuilt so like brand new, 3" full xhaust, new turbo t4/t3 highflowed vl t3 compressor (t4) and t3 exhaust wheel.It seems to develop boost from 3000 then by 3500 it may have 4-7psi and not very responsive to this then it hits about 4500 revs and then it kicks the fark out of my seat and throws me down the road!!!Now this is fun and its running 12psi but what can i actualy run on this set up considering all i have is a safc .Should i be putting more fuel into it???Can someone point me in the right direction :D marty

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R31Nismoid Grand Master

R31Nismoid

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Posted
Ok fellas ,got are custom fmic, head has been off and fully rebuilt so like brand new, 3" full xhaust, new turbo t4/t3  highflowed vl t3 compressor (t4) and t3 exhaust wheel.It seems to develop boost from 3000 then by 3500 it may have 4-7psi and not very responsive to this then it hits about 4500 revs and then it kicks the fark out of my seat and throws me down the road!!!Now this is fun and its running 12psi but what can i actualy run on this set up considering all i have is a safc .Should i be putting more fuel into it???Can someone point me in the right direction :)  marty

So is it a T04 Comp housing or a T03 one still???

If it's not a T04 front housing then you've got a T3 Hi-flowed. Not a T3/4.

I had a T3/4 and it hit 13psi by 4200rpm.

Get the car onto a dyno... my bet is that you'll be running out of fuel.

1) Because your fuel pump wont be upto the task.

2) The injectors wont make much more than ~200rwkw before you need to upgrade the Reg or injectors themselves anyways.

15psi...

run it rich.

my bro runs 15psi on his R33 gtst with stock internals, stock ecu, stock turbo :)

and it hits full boost at 4,500rpm spools at 2,500

I hope your brother has some cash floating around because he'll but shopping for a new turbo soon. :Bang: :Bang:

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

I dunno.

It's all about wheels and housings combo.

but for a hi-flowed T3 that is appalling lag, it should'nt be that laggy i reckon.

probably will be a tad more than what you had before, but not hugely.

As i said, i have a t04 comp housing, T3 rear, and i get 13psi @ 4200rpm

You had it on a dyno yet???

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