ST80 track results
05-31-2008, 03:37 AM
#1
ST80 track results had a best pass of 10.49 @ 134.73 with a 1.728 60'. Track was not hooking at all for me tonight. Usually my worst 60's are in the low 1.7's and normal is low 1.5's to low 1.6's depending on track prep. Not too bad though. Managed a 6.791 @ 107.8 in the 1/8 which is 0.3 slower than my fastest pass so it with the T76 seems like the car has quite a bit of ET left in it.
Other passes were:
11.009 @ 133.37 on a 1.99 60' (still faster than Georges best)
10.684 @ 133.94 on a 1.81 60'
10.511 @ 133.98 on a 1.80 60'
At least I got 5 passes (timing was screwed up on one pass). It's nice to have the car launch like crap still run mid 10's I think it will go high 9's with some more track bite.
Boost was 17psi, tried 20psi on the one run but didn't gain anything so something in my system is at the limit. I'm done as far as i'm concerned. I'm probably going to swap a smaller housing on and just enjoy the car now. It's fast enough.
Other passes were:
11.009 @ 133.37 on a 1.99 60' (still faster than Georges best)
10.684 @ 133.94 on a 1.81 60'
10.511 @ 133.98 on a 1.80 60'
At least I got 5 passes (timing was screwed up on one pass). It's nice to have the car launch like crap still run mid 10's I think it will go high 9's with some more track bite.
Boost was 17psi, tried 20psi on the one run but didn't gain anything so something in my system is at the limit. I'm done as far as i'm concerned. I'm probably going to swap a smaller housing on and just enjoy the car now. It's fast enough.
05-31-2008, 09:25 AM
#3
Nicely done....I agree sounds like something limiting in the system. Several customers of ours running the ST80's are going into the 150+mph range. Of course they are front mounts, but you should be able to get closer.
wondering if maybe the piping diameter/distance is becoming a restriction.
wondering if maybe the piping diameter/distance is becoming a restriction.
05-31-2008, 11:37 AM
#5
I'm thinking that intake piping size is the choke point, might try to go to some 3" to see if it will improve since that is fairly cheap to have done. Right now my piping is 2.25-2.5 to the intercooler, it's 3" after the intercooler though so only the long mostly straight run needs to be done. I was hoping to get this thing into the 140 range, but it's not going to happen until the choke point is found.
I should probably throw a boost gage on the turbo outlet to see how much pressure my piping is losing, it's probably pretty bad.
Last edited by Zombie; 05-31-2008 at 11:44 AM.
06-01-2008, 02:31 AM
#7
had a best pass of 10.49 @ 134.73 with a 1.728 60'. Track was not hooking at all for me tonight. Usually my worst 60's are in the low 1.7's and normal is low 1.5's to low 1.6's depending on track prep. Not too bad though. Managed a 6.791 @ 107.8 in the 1/8 which is 0.3 slower than my fastest pass so it with the T76 seems like the car has quite a bit of ET left in it.
Other passes were:
11.009 @ 133.37 on a 1.99 60' (still faster than Georges best)
10.684 @ 133.94 on a 1.81 60'
10.511 @ 133.98 on a 1.80 60'
At least I got 5 passes (timing was screwed up on one pass). It's nice to have the car launch like crap still run mid 10's I think it will go high 9's with some more track bite.
Boost was 17psi, tried 20psi on the one run but didn't gain anything so something in my system is at the limit. I'm done as far as i'm concerned. I'm probably going to swap a smaller housing on and just enjoy the car now. It's fast enough.
Other passes were:
11.009 @ 133.37 on a 1.99 60' (still faster than Georges best)
10.684 @ 133.94 on a 1.81 60'
10.511 @ 133.98 on a 1.80 60'
At least I got 5 passes (timing was screwed up on one pass). It's nice to have the car launch like crap still run mid 10's I think it will go high 9's with some more track bite.
Boost was 17psi, tried 20psi on the one run but didn't gain anything so something in my system is at the limit. I'm done as far as i'm concerned. I'm probably going to swap a smaller housing on and just enjoy the car now. It's fast enough.
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06-01-2008, 12:21 PM
#8
9 Second Club
Hot Vegas air this time of year vs. the 72 degree night for the T76?
The .3s slow at the 1/8th is nothing with that bad of a 60' and slightly slower spool on the ST80. Get that baby to hook and give it a load and you'll be back on track for the 9s even before you find the missing power.
Rick
The .3s slow at the 1/8th is nothing with that bad of a 60' and slightly slower spool on the ST80. Get that baby to hook and give it a load and you'll be back on track for the 9s even before you find the missing power.
Rick
06-01-2008, 01:25 PM
#10
I've told you multiple times your unit was one of the early ones that used a different flange on the exhaust housing which we no longer carry. I told you to send it in and we would swap it for you, plus you wanted a race cover added.....what's the problem? This was discussed MULTIPLE times over PM's....send it in. You said you were going to...
06-01-2008, 01:27 PM
#11
Front mount and rear mount are 2 totally different animals. He already had a 76 on the car.....maxed out it never mph'ed that range.
06-01-2008, 01:28 PM
#12
What is the general rule of thum on intercooler piping size vs hp? How much effect does it have?
I'm thinking that intake piping size is the choke point, might try to go to some 3" to see if it will improve since that is fairly cheap to have done. Right now my piping is 2.25-2.5 to the intercooler, it's 3" after the intercooler though so only the long mostly straight run needs to be done. I was hoping to get this thing into the 140 range, but it's not going to happen until the choke point is found.
I should probably throw a boost gage on the turbo outlet to see how much pressure my piping is losing, it's probably pretty bad.
I'm thinking that intake piping size is the choke point, might try to go to some 3" to see if it will improve since that is fairly cheap to have done. Right now my piping is 2.25-2.5 to the intercooler, it's 3" after the intercooler though so only the long mostly straight run needs to be done. I was hoping to get this thing into the 140 range, but it's not going to happen until the choke point is found.
I should probably throw a boost gage on the turbo outlet to see how much pressure my piping is losing, it's probably pretty bad.
06-01-2008, 01:32 PM
#13
I've told you multiple times your unit was one of the early ones that used a different flange on the exhaust housing which we no longer carry. I told you to send it in and we would swap it for you, plus you wanted a race cover added.....what's the problem? This was discussed MULTIPLE times over PM's....send it in. You said you were going to...
I wasnt bashing I just want to get it on the car,and i was just saying you guys cant get the flange.
I cant wait to drive a turbo car thats all....
06-01-2008, 11:42 PM
#16
The ST80 is barely better than the T76 was and that should not be the case. Back pressure has been eliminated from the system as a culprit so now I am thinking the problem is intake piping. Our DA Friday night was really good, it was only 4200' at 11pm when it was 80 degrees out so that shouldn't be holding me back much.
Once the piping is changed out I'll of course post my results for everyone. I'm pretty sure it will be worth something since it's probably not the best to be flowing 900hp worth of 250+ degree air through 5' of 2.25" piping.
06-02-2008, 12:52 AM
#17
Hot Vegas air this time of year vs. the 72 degree night for the T76?
The .3s slow at the 1/8th is nothing with that bad of a 60' and slightly slower spool on the ST80. Get that baby to hook and give it a load and you'll be back on track for the 9s even before you find the missing power.
Rick
The .3s slow at the 1/8th is nothing with that bad of a 60' and slightly slower spool on the ST80. Get that baby to hook and give it a load and you'll be back on track for the 9s even before you find the missing power.
Rick
Get that bitch figured out Zombie...I bet 9.50ish with no bugs and a good launch!
06-02-2008, 02:01 AM
#18
Zombie, i think TRT did a custom setup for a rear mount 88 that used two sets of stock coldside piping. this keep the ground clearance but give you much more flow on the coldside. i think it was for longrage4u's car.
Cheers
Chris,
Cheers
Chris,
i just am so jealous i want my ST running...even not running right you are still trapping great.Way better than my maggie with spray did ,so now im just even more excited to get this thing running...didnt mean to hijack your thread...
06-02-2008, 09:48 PM
#20
As Dr Turbo said, it's a rear mount and I've still got bugs to squish.
The ST80 is barely better than the T76 was and that should not be the case. Back pressure has been eliminated from the system as a culprit so now I am thinking the problem is intake piping. Our DA Friday night was really good, it was only 4200' at 11pm when it was 80 degrees out so that shouldn't be holding me back much.
Once the piping is changed out I'll of course post my results for everyone. I'm pretty sure it will be worth something since it's probably not the best to be flowing 900hp worth of 250+ degree air through 5' of 2.25" piping.
The ST80 is barely better than the T76 was and that should not be the case. Back pressure has been eliminated from the system as a culprit so now I am thinking the problem is intake piping. Our DA Friday night was really good, it was only 4200' at 11pm when it was 80 degrees out so that shouldn't be holding me back much.
Once the piping is changed out I'll of course post my results for everyone. I'm pretty sure it will be worth something since it's probably not the best to be flowing 900hp worth of 250+ degree air through 5' of 2.25" piping.
If that is true that is a BIGGGG problem. I will check the math again in the morning, I hope its wrong....lol. If not its a miracle that turbo can make that kind of boost at the intake.....its fighting hard to push that air.