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Discussion Starter · #1 ·
I have been searching for info on this for a while now. I would truly like to buy a GT4088R and be done with it, but right now money is tight and I'm not sure I can afford a ball bearing turbo when the time comes.

So what I am looking for is anyone's input on spool time for decently sized journal bearing turbos on a stock displacement motor with stock heads. My goals are between 550-600 whp. I have a pretty good knowledge of turbos and choosing the right turbo, but some first hand RB26 specific info would be great. Specifically these are the turbos that I am looking at mostly...but if anyone has any other suggestions definitely don't hesitate to voice you're opinion. Some specs were hard to find on the GT4088 and the HP66.

Garrett TO4R

compressor: TO4S
.70 a/r
66.5mm inducer
84 trim
flow: 75 lbs/min 960cfm
360* thrust bearing standard

turbine: T4
.96a/r divided
P trim wheel

flow: 75 lbs/min 960cfm
360* thrust bearing
wet center section


Garret GT4088

compressor
.72 A/R
88mm 54 trim

turbine: T4
1.06 A/R Divided
77mm 84 trim


AGP HP66

Compressor: TO4S
66mm inducer

Turbine: T4
1.00 A/R Divided
76 trim stage 5 *or* P trim
 

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Discussion Starter · #2 ·
I would like to ad another one to the list...essentially the same as the HP66, but different company with a good reputation...claims it is 755hp capable

PT66

Compressor:
66mm inducer
52 trim

Turbine: T4
.96 A/R Divided
P-Trim Wheel
76 Trim

360* Race bearing
 
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