yonner

what problems would you incounter with running a tight AR exhaust housing like .45

Sonny

If the a/r is numerically lower, it will shift the powerband down and the peak power will be lower and occur at a lower rpm. Benefit is faster spool.

If it is numerically higher, reverse the above.

Sonny

yonner

so with a low ar i could get around 350 hp with a good fast spool?

Kevin T. Wyum

Depends on the compressor size and the rest of the car and what boost you'll run. The best way to think of it is that your efficiency island will shift toward lower RPM overall, Sonny had a good explanation.

Kevin T. Wyum

Sonny

The Garrett T3/T04E hybrid turbo is very popular for this reason. You couple the fast spool of the T3 turbine side with the power ability of the T04E/S/R compressor family to have a pretty versatile setup.

Here's an example:



That's a 1.7 liter Honda engine running about 25 psi of boost through a Garrett T3/T04S (T3/60-1) turbo.

Specs:

Garrett T3 "stage 5" turbine wheel
.82 a/r T3 exhaust housing
Garrett T04S (60-1) compressor wheel
Garrett T04S (.70 a/r) compressor housing

This setup is pretty extreme and obviously not a real good choice on the street. It is very laggy. The whole powerband could be shifted down by 1000+ RPM by switching to the .63 a/r exhaust housing and/or the smaller stage 3 turbine wheel. However, you would lose power on top, so it's a trade off.

If I ever get the money and can legally do it (ie, leave California), I'm gonna try Full Race's T3/T67 on my car. I have no doubt that the rotary could spin this turbine up early and then take advantage of the huge compressor attached to it.

Sonny

yonner

i have a TO4R compressor .70 a/r 66.5mm inducer - flow: 75 lbs/min 960cfm - 360* thrust bearing standard

and a blitz T04E 57T

i want as litle lag as posible and a good 400 fwhp at lest 350 to the rear wheals

Sonny

The above only says what you have in terms of a compressor.

The T04R compressor is also commonly known is the "T67". You can make A LOT of power with that compressor. The Blitz is just a T04E 57 trim compressor. The 57 trim TO4E will flow about 50 lb/min. It's a much smaller compressor than the T67.

What you need to find out is the trim of the turbine wheel and the a/r of the turbine housing.

Sonny

yonner

i am thinking about buying this


COMPRESSOR SPECS:

flow: 50 lbs/min 640cfm

.60 A/R HOUSING

57 TRIM WHEEL

TURBINE SPECS:

.48 A/R HOUSING

STAGE 3 WHEEL

standard with 270 degree thrust bearing


what u think

Sonny

I think that turbine housing will be way too small for what you're trying to do. You'll have to ask some others here for advice, but I would imagine that the rotary can spool the turbo pretty well (ie, with a liveable amount of lag) with a .82 a/r housing.

Sonny

yonner

COMPRESSOR SPECS:

flow: 53 lbs/min 678cfm

.60 A/R HOUSING

60 TRIM WHEEL

TURBINE SPECS:

.82 A/R HOUSING

STAGE 3 WHEEL

standard with 270 degree thrust bearing

oil lubricated centersection.


so would this one be any good???

yonner

ok i have the chance to buy an hks t04e full kit the trim is 57t the a/r is 0.84 with a racing waste gate. will that spool at least 3000 rpm?