Match me a turbo - looking for these specs on the compressor map

[m1tch]

Hi guys, just having a look around for a new shiny turbo in the future to keep an eye out for, it will be for my FC with extended ports.

I am looking for 400bhp atf running a boost pressure no more than 1.2bar gauge pressure. Had a look at certain specs and such from FC3S pro and a few other help sites and I am looking for a turbo that can give this kind of figure with a 70%+ efficiency island:

Airflow - 400 lb/min
Pressure ratio - 2.0ish

Does anyone know of a turbo that would allow for this? Im guessing a T04S,R or Z

Did have a look at a GT45 or maybe a T-66

This will be for a fast road/track (with a bit of fun but not serious drag racing lol) so Im not looking for UBER power - 400-450 is plenty for the road!

[m1tch]

Would I be looking for a turbo with a hotside of 1.15ish and a cold side of 0.7ish?

[L18M]

i would of thought a/r hotside 1 would be better for fast street? as opposed to 1.15??
bigger hotside a/r = more lag?

[m1tch]

But it would need to be big enough to be able to turn the compressor, a tiny tiny turbine isn\'t going to be able to turn a large compressor wheel lol

[hairyhoover]

A/r isn\'t a measurement of the wheel but of the housing the wheel is contained with. I\'m using a t04s with a 1.0 a/r and it\'s a good balence between top end power and spool.

[AshRX]

Do you know how big a GT45 is lol???

400 bhp at fly go for a T04s. A t04r will give you more than that at 1.2 bar.

If you want something small that spools quick and no lag look at a GT35/40 or T60

[hairyhoover]

With the right porting 450 to 500 is possible at 1.2bar

[AshRX]

on what turbo?

[hairyhoover]

Using t04s.. I take it your not convinced??

[AshRX]

mmmm the porting would have to be big to say the least and will have to match the turbo. Never heard of a T04s making 500bhp.

I have seen @ 1.2 bar a T88 34d making 499.6bhp, a GT4094 making 460 bhp but never a T04s.

Now your gonna tell me this is what yours is running and im gonna look like an idiot I know of a T04z that make 450 atw and that was at even higher boost in Blitzboys car

[hairyhoover]

Lol I\'ve not had mine on the rollers
yet..... Era ported my engine and blitz mapped it

we were hoping for around 400rwhp

[AshRX]

Famous Old One\'s ports

Be interesting to see the graph for it once done

[hairyhoover]

I\'ll be sure to put them up

[m1tch]

Well I know that you can get just over 300bhp from the stock turbo lol although the AR on the hot side is just over 1 as well

Can someone tell me the a/r specs to get the sort of power, im guessing

1.15ar hotside
0.7ar cold?

[AshRX]

That hotside could be off anything. Ie i have a GT42 with 1.28 hotside but can have 1.01 or 1.14. The GT40\'s come with a hotside 1.15, that sounds like either a GT35, 40 or Greddy turbo to me as most of the HKS units are 1.0 hotside ( you can buy larger housings )