OWHAT

gt35r is that the same as the 35/40?
what power can u make out of them on 15psi?

peachykeenwight

I have a large streetport and S6 rotors.. making >410 whp at 13 psi with a 62-1 with a divided .96 a/r exhaust housing. I start boosting well at 3,000 rpm and see full boost inbetween 4,000 and 4,500 rpm. Judging by the set-up you have, I'd say you could expect similar results.

This turbo is very strong, but I know GT35Rs, T61s, and the others named here are all great turbos as well... if it were me, I'd buy the cheapest out of those three (GT35R, T61 or 62-1) that you can find and call it good. Your car is going to be phenomenal no matter which turbo you choose.

Good luck.

OWHAT

hey mate thanks heaps for ur words,, helped me out a bit cheers

GUITARJUNKIE28

i doubt you're getting 410+ whp at 13psi. that would be so far out of the efficiency range it's not even funny. the .96 housing is undivided.

OWHAT

so u think it would make less or more then 410?

PhatManBUD

I will be running a MasterPower T60 w/ 1.00 a/r divided. Ill let you guys know when the cars ready on the dyno. Ill put puttin around 14psi until im ready to go 18-20.

GUITARJUNKIE28

less. if it actually DID do 410 @ 13psi, which i doubt, it's somewhere in the low 60's for efficiency. i honestly don't see it happening. if he said 14, it'd be a stretch, but maybe believable under very good conditions.

400@ 14-16 is about the norm for that compressor. if you're running meth or race gas, you can lean it out and crank the timing way up and hit a bit more.

peachykeenwight

I have a dyno sheet of 409.6rwhp @ 14psi before it was tuned by Steve. Judging by the changes made, I'd say that I am above 409. I guess there's only one way to find out, though. Dyno time in a couple of weeks anyway. I'll let you know what the results are.

And my bad, it's not a divided exhaust housing as guitar said (thanks for correcting me). This dyno was on 93 octane, no injection of any kind on a Dynojet.

GUITARJUNKIE28

so you didn't actually get a dyno of the 410+ @ 13psi?

OWHAT

hey mate how did u read that off the map, i went to like 1.95 on the vertical the acros to like 41 on the horizontal but it didnt show 60%, so where did i go worng lol

GUITARJUNKIE28

the map is scaled in airflow, not hp.

peachykeenwight

No sir, not yet. I'd say just from driving it that it is an accurate assumption though. I'll post a sheet whenever I have a chance to get out to the dyno.

hondahater

iTrader: (2)

well good luck with the dyno I'll be rooting for you

GUITARJUNKIE28

ok, i think you'll end up having to boost it a bit higher to hit those numbers, but good luck on that.

peachykeenwight

I already hit very close those numbers without the timing/fuel changes Steve did.

You also mentioned that I would be landing at around 60% efficiency. How do you figure? According to what I calculated, I'm perfectly fine... 75'ish%.

I'm not here to argue. Regardless of however my numbers became my numbers, OWHAT can expect a 400 horsepower car with the correct combination of turbo/porting/fuel/engine management. Do you disagree with that?

peachykeenwight

Thank you.

bobybeach

hi phat, I just had a local customer call me yesterday with his results. he made 373whp @ 14psi on stock port 13b, he is running mp t-61 with 1.00ar also. unfortunitly he doesnt want to run more psi because his engine is high on mls and worried about its reliabilty.

OWHAT

hey bobybeach do u know what sort of rpm he was seeing boost? and what rpm he was full spooled at 14 psi?
thanks

slo

iTrader: (1)

What kind of dyno?

bobybeach

all i know is that it was laggy untll 4000rpm. It would have been better with .84ar housing.

bobybeach

it was a dyno pack, hub dyno.

bobybeach

Also compressor maps are just for reference when comparing to other compressors,
You can’t just look at hp then assume to know the lbs/min to find the efficiency.... For example the whp will change with different turbine trims and turbine housing ar while the boost and lbs/min remain consistent on the compressor.

And lbs/min changes dramatically through the rev range even with constant psi, so to convert peek hp to an assumed static lbs/min makes compressor map efficiency chart a difficult tool for measuring the performance of a compressor in its application accurately.

I Think compressor maps are best used for comparing boost stability between other compressor.

PhatManBUD

Thanks for the info Oliver!

Hopefully i will break 400whp @14psi and later when im ready upwards of 450 @ 19-20.

bobybeach

hi phat, yes i think thats very accheivable, with gd fuel or water injection you can make over 400 at 14psi. remember one local customer has made 513whp at just 18psi on t-61 because of the agrresive ignition tune with the water injection he was using.

GoodfellaFD3S

iTrader: (213)

But what happens if the water inj pump fails or the nozzle gets clogged? I run an aquamist setup, but only to give me a margin of error, I purposely am not tuned for it.