T61 vs GT35R
#26
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Originally Posted by DrPJM1
I believe that 15psi on the GT35R is about the maximum you can squeeze out of it using 93-octane pump gas.
#30
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while were on the subject, what have people been able to run on pump gas with the t61?
am i being conservative at 16-17psi? im running 14degrees of advance with my crank trigger at 67 degrees. (haltech)
afrs are between 10.5-11:1
am i being conservative at 16-17psi? im running 14degrees of advance with my crank trigger at 67 degrees. (haltech)
afrs are between 10.5-11:1
#31
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ive run my pt61 up to 21 psi on pump gas with around 12 degrees advance at that point. a/f ratios around 10.8.
made over 450rwhp with stock motor, but i was spinning my wheels on the clayton dyno...
im only running 17-18 psi now on a ported motor. around 13 or 14 degrees there
made over 450rwhp with stock motor, but i was spinning my wheels on the clayton dyno...
im only running 17-18 psi now on a ported motor. around 13 or 14 degrees there
#32
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Originally Posted by nyt
ive run my pt61 up to 21 psi on pump gas with around 12 degrees advance at that point. a/f ratios around 10.8.
made over 450rwhp with stock motor, but i was spinning my wheels on the clayton dyno...
im only running 17-18 psi now on a ported motor. around 13 or 14 degrees there
made over 450rwhp with stock motor, but i was spinning my wheels on the clayton dyno...
im only running 17-18 psi now on a ported motor. around 13 or 14 degrees there
#34
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Originally Posted by KNONFS
Do you have a dyno sheet, I would love to see the TQ graph
i have a 17psi graph without torque reading, only mph if you want to do the conversions and plot it. let me know ill send it to ya
#35
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oh and as for pt61 spoolup...
id see 20psi at about 4500 rpm on my stock motor. hks cast manifold, racing beat exhaust, .96 p trim wheel.
i JUST broke in a street port motor with this turbo.. it has hit 7psi (6.7 spring in wastegate) below 3000 rpm. ill post more info when i get everything tuned with this motor.
id see 20psi at about 4500 rpm on my stock motor. hks cast manifold, racing beat exhaust, .96 p trim wheel.
i JUST broke in a street port motor with this turbo.. it has hit 7psi (6.7 spring in wastegate) below 3000 rpm. ill post more info when i get everything tuned with this motor.
#36
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Originally Posted by nyt
oh and as for pt61 spoolup...
id see 20psi at about 4500 rpm on my stock motor. hks cast manifold, racing beat exhaust, .96 p trim wheel.
i JUST broke in a street port motor with this turbo.. it has hit 7psi (6.7 spring in wastegate) below 3000 rpm. ill post more info when i get everything tuned with this motor.
id see 20psi at about 4500 rpm on my stock motor. hks cast manifold, racing beat exhaust, .96 p trim wheel.
i JUST broke in a street port motor with this turbo.. it has hit 7psi (6.7 spring in wastegate) below 3000 rpm. ill post more info when i get everything tuned with this motor.
#37
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yeah im still using the .96 housing. i have 3 springs. 6.7, the 10 and the 1bar. the 10psi spring will let you hold some decent boost. i have the 1bar if i need to go crazy =]
the 6.7 spring wont be able to hold the boost for sure. i saw the same thing happen with it. i only have it in there to break in the motor
the 6.7 spring wont be able to hold the boost for sure. i saw the same thing happen with it. i only have it in there to break in the motor
#38
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#39
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i wonder if you'd actually notice a difference with the two if you're only running 14-15 psi... the t61 looks like it'd be really nice for a small half bridge on pump gas.
#41
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Originally Posted by nyt
sorry, no torque readings from that dyno. the rpm hookup wasnt working...
i have a 17psi graph without torque reading, only mph if you want to do the conversions and plot it. let me know ill send it to ya
i have a 17psi graph without torque reading, only mph if you want to do the conversions and plot it. let me know ill send it to ya
#42
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Originally Posted by nyt
if all youre going to run is 15 psi id say go with a 60-1, if youre going to run more, definitely pt61.
id think a half bridge might be a little too much for a pt61.. id suggested a 63 or a 66.
id think a half bridge might be a little too much for a pt61.. id suggested a 63 or a 66.
Sorry, I can't read maps
#43
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Originally Posted by KNONFS
How about 15psi on daily use and 20psi on the raceway? Would you still pick the 60-1 over the T61?
Sorry, I can't read maps
Sorry, I can't read maps
heres a plot i did a while ago. 20psi pt61
and another kinda ghetto one (dots are 4k - 8k rpm) so you can see where the pt61 kinda runs out.
heres a 60-1 graph... you can see at a pressure ratio of 2.4 (20 psi) and 55-60 lbs/min its getting pretty far out of efficiency and you can see its not suited for higher pressure ratios.
#44
[QUOTE=ErnieT]There's no way in hell a GT35R will ever see 500rwhp. Maybe if you overspin it and overheat it at some 30psi and two weeks later the oil seals puke on ya.
Would you put money on that last statement?
Would you put money on that last statement?
#45
NorCal 7's Co-founder
If you can prove him wrong I'd love to see the dyno chart. I think that it might be possible with the new T4 hotside GT35R, but I would be surprised to see 500rwhp on the T3 hotside 35R.
Zach
Zach
#46
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Originally Posted by BoostedRex
If you can prove him wrong I'd love to see the dyno chart. I think that it might be possible with the new T4 hotside GT35R, but I would be surprised to see 500rwhp on the T3 hotside 35R.
Zach
Zach
#47
yeah mines the t4 on a street port. The cars been coming along little by little over the last 2 years, but I hope to shock some people by the end of this summer. It still needs to be tuned after I get the body finished up. In the next week or two i'm having my new pettit rear flares molded on and painted. So bottom line i'll have new pix and a dyno sheet by the end of august hopefully sooner.... Had to throw the flares in i'm pretty excited about em.
#48
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Originally Posted by Zero R
Also know of plenty 35Rs at 32lbs never **** any bearings.
So the GT35r will no way in hell make 500whp, yet it makes 450 at under 20psi on some setups and can handle a proven, in actually and map wise, 30psi+? What the hell is going on here?
#49
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this guy doesnt seem to have a problem running the gt35r at 30+psi, its not on a rx7 though.
http://srvidz.vidiac.com/Player.aspx...F9B35F6368&p=0
http://srvidz.vidiac.com/Player.aspx...F9B35F6368&p=0
#50
NorCal 7's Co-founder
I'm quite sure that the T4 hotsided GT35R's that A-spec is selling will hit 500rwhp with a streetport, good tuning, and race gas. I'll be happy with 425-450rwhp on pump gas. I fully believe that's a reachable goal.
Zach
Zach