REAL Disappointing Track Results today...
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Originally Posted by Noize
Dynapacks pull the wheels from the hubs and inflate numbers. Also, its stupid humid outside right now. Those two things are the most truthful and real ones that I can come up with for you. Run the car at Pruven again.
I would love to run the car at Pruven again but it is 5+ hours away
If if the Dynapaks numbers were inflated...the last tune I was boosting 17-18 psi and dropping to 15-16
Since then I added a 2.5"DP, Walbro Pump and a MBC holding boost at 21psi and was retuned...I think that combo could have netted ~25-35whp, so I dont think the Dynapaks numbers are too far off
this is what i did so far this year.mod's that i have,pwr fmic,3"turbo back no cat,cam gear's
mbc,21lbs,air filter of some sort,93 octane al,s flash mail in.
60ft......1.977
1/4 et...13.03
1/4 mph.107
best i could do stock was 14.00.
for coparison only.
mbc,21lbs,air filter of some sort,93 octane al,s flash mail in.
60ft......1.977
1/4 et...13.03
1/4 mph.107
best i could do stock was 14.00.
for coparison only.
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From: Port Saint Lucie, FL (South FL)
*EDIT* Just read you had a Walbro 255 
DO you have a feul pump? It is summer and maybe your car is leaning out and ecu is pulling major timing. It could be a possibility. I remember Al was talkin about how stock fuel pumps crap out and causes the car to lean out and pull major timing. Just a thought. Good luck
Krunal
DO you have a feul pump? It is summer and maybe your car is leaning out and ecu is pulling major timing. It could be a possibility. I remember Al was talkin about how stock fuel pumps crap out and causes the car to lean out and pull major timing. Just a thought. Good luck
Krunal
Originally Posted by rebelzx
You picked up 27 mph in the back 1/8. That means you are definitely making the power. Figure out what's wrong with that 1/8 time and you should do 12's with ease. I hit 12.9 in ****ty track conditions with a 104 trap, so it shouldn't be too hard for you to get into the 12s.
Your BACK HALF 1/8th - (biggest indication of pure whp as you are mostly pulling in 4th gear) has picked up HUGE with the addition of the boost controller and retune - before you were picking up 21 mph - now you are up to 27 mph increase in the back 1/8th - - BIG improvment in pure power - as is reflected in the whp figures
IF you want to tear *** in the 1/4 mile you will need to upgrade some of the exhaust b/c while a stock cat and cat to axel section is fine for low end power - on high rpms - (mostly where you are drag racing) it chokes off the power on top - - LOOK at your 2nd dyno sheet
Judging by your increase in trap speed in the back 1/8th - I think if you got a nice mid 1.6 60' you could improve on your times a lot - - 1 .80 or 1.78 is not that good a launch - - try differnt lanuching methods and lowering your tire pressure also
Last edited by DynoFlash; Jun 13, 2004 at 12:51 PM.
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Originally Posted by DynoFlash
Rebel ZX is on the right path here
Your BACK HALF 1/8th - (biggest indication of pure whp as you are mostly pulling in 4th gear) has picked up HUGE with the addition of the boost controller and retune - before you were picking up 21 mph - now you are up to 27 mph increase in the back 1/8th - - BIG improvment in pure power - as is reflected in the whp figures
IF you want to tear *** in the 1/4 mile you will need to upgrade some of the exhaust b/c while a stock cat and cat to axel section is fine for low end power - on high rpms - (mostly where you are drag racing) it chokes off the power on top - - LOOK at your 2nd dyno sheet
Judging by your increase in trap speed in the back 1/8th - I think if you got a nice mid 1.6 60' you could improve on your times a lot - - 1 .80 or 1.78 is not that good a launch - - try differnt lanuching methods and lowering your tire pressure also
Your BACK HALF 1/8th - (biggest indication of pure whp as you are mostly pulling in 4th gear) has picked up HUGE with the addition of the boost controller and retune - before you were picking up 21 mph - now you are up to 27 mph increase in the back 1/8th - - BIG improvment in pure power - as is reflected in the whp figures
IF you want to tear *** in the 1/4 mile you will need to upgrade some of the exhaust b/c while a stock cat and cat to axel section is fine for low end power - on high rpms - (mostly where you are drag racing) it chokes off the power on top - - LOOK at your 2nd dyno sheet
Judging by your increase in trap speed in the back 1/8th - I think if you got a nice mid 1.6 60' you could improve on your times a lot - - 1 .80 or 1.78 is not that good a launch - - try differnt lanuching methods and lowering your tire pressure also
I launched around 5700rpms with a dump of the clutch...
I guess my question is, how did I get a 1/8 time of 8.4@82.91mph with a 1.87 60' with LESS mods and a 8.4@78.78 with MORE mods and a 1.78 60' when the stock cat/mid section was never changed in either run?
Forgive my ignorance here, I am just trying to figure all this out.
Originally Posted by GottaGoFaster
I launched around 5700rpms with a dump of the clutch...
I guess my question is, how did I get a 1/8 time of 8.4@82.91mph with a 1.87 60' with LESS mods and a 8.4@78.78 with MORE mods and a 1.78 60' when the stock cat/mid section was never changed in either run?
Forgive my ignorance here, I am just trying to figure all this out.
I guess my question is, how did I get a 1/8 time of 8.4@82.91mph with a 1.87 60' with LESS mods and a 8.4@78.78 with MORE mods and a 1.78 60' when the stock cat/mid section was never changed in either run?
Forgive my ignorance here, I am just trying to figure all this out.
I think something was wrong with that 1/8th trap speed indicator this last time you were out. Did you try running in both lanes? There is no way you lost that much speed in the 1/8th mile like that. A 105mph car will not trap 78mph in the 1/8th; Also, the 1/8th ET:trap ratio is off. I bet you were running closer to 83mph there, and there's a problem with their equipment. I'm sure your car is totally fine.
Work on that launch a little bit (without being too abusive on the clutch) and go in a less humid day, and you have high 12s very easily. Good luck.
Back to the Dynapack, since the weight of the wheels are removed, you're getting a different reading than any other type dyno. That said, few dynos are equal. TurboXS Dynapack reads ridiculously high, while Knowledge Performance's Dynapack reads extremely low. None of this matters, of course, but you need to pick a place where you want to tune and stick with it so you can compare.
Work on that launch a little bit (without being too abusive on the clutch) and go in a less humid day, and you have high 12s very easily. Good luck.
Back to the Dynapack, since the weight of the wheels are removed, you're getting a different reading than any other type dyno. That said, few dynos are equal. TurboXS Dynapack reads ridiculously high, while Knowledge Performance's Dynapack reads extremely low. None of this matters, of course, but you need to pick a place where you want to tune and stick with it so you can compare.
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Hmm to me it sounds like your clutch. I mean i've seen alot of time slips of people getting sick 60' times, and then their clutch doesn't fully engage in the rest of the gears. That would just be my guess though. Hope you find out your problem.
Ick... Didn't think about the clutch factor. 
I wish I could help there, but I know little about how a clutch performs when it is starting to let go. In the past on other cars, I've always killed trannies instead of clutches, sadly.
I wish I could help there, but I know little about how a clutch performs when it is starting to let go. In the past on other cars, I've always killed trannies instead of clutches, sadly.
Originally Posted by Noize
I think something was wrong with that 1/8th trap speed indicator this last time you were out. Did you try running in both lanes? There is no way you lost that much speed in the 1/8th mile like that. A 105mph car will not trap 78mph in the 1/8th; Also, the 1/8th ET:trap ratio is off. I bet you were running closer to 83mph there, and there's a problem with their equipment. I'm sure your car is totally fine.
Work on that launch a little bit (without being too abusive on the clutch) and go in a less humid day, and you have high 12s very easily. Good luck.
Back to the Dynapack, since the weight of the wheels are removed, you're getting a different reading than any other type dyno. That said, few dynos are equal. TurboXS Dynapack reads ridiculously high, while Knowledge Performance's Dynapack reads extremely low. None of this matters, of course, but you need to pick a place where you want to tune and stick with it so you can compare.
Work on that launch a little bit (without being too abusive on the clutch) and go in a less humid day, and you have high 12s very easily. Good luck.
Back to the Dynapack, since the weight of the wheels are removed, you're getting a different reading than any other type dyno. That said, few dynos are equal. TurboXS Dynapack reads ridiculously high, while Knowledge Performance's Dynapack reads extremely low. None of this matters, of course, but you need to pick a place where you want to tune and stick with it so you can compare.
When looking at a dyno pak the numbers mena nothing - just look at the curve and only use the numbers to compare to the same settings by the same shop to guage your progress
Yea it seems to be set up for 4500 to 5500 and below. Its good to try and get your top HP closer to 6k or so if possible. The Torque curve drops pretty signifigantly as well...is that normal? Sorry just asking as I really don't know.
The clutch point is not to be taken lightly either. A clutch can definately rob you of power if it is just starting to go out and slipping slightly.
The clutch point is not to be taken lightly either. A clutch can definately rob you of power if it is just starting to go out and slipping slightly.
Originally Posted by Noize
Ick... Didn't think about the clutch factor. I wish I could help there, but I know little about how a clutch performs when it is starting to let go. In the past on other cars, I've always killed trannies instead of clutches, sadly.
I wish I could help there, but I know little about how a clutch performs when it is starting to let go. In the past on other cars, I've always killed trannies instead of clutches, sadly.Dan from pruven got into my car and in one pass he got a 11.6!
Driver skill is key
I suck
Huh, huh... You got spanked. 
I like the 10.99 in the far lane.
I am just joking with you.
The downpipe has to go. 2.5 is toooo small, especially with a stock cat and what sounds like stock exhaust?
You left at 5700 on a dump and the car was probably still choking because it can't get the exhaust out. Pressure drop across the turbo is very important, especially in drag racing. It's all or nothing and you want the turbo to get up to speed as fast as possible and stay there. I think the gains on the back end were purely less shifting and therefore less slow time for the turbo. I think a 3" exhuast, downpipe back will kill those numbers.
I like the 10.99 in the far lane.
I am just joking with you.
The downpipe has to go. 2.5 is toooo small, especially with a stock cat and what sounds like stock exhaust?
You left at 5700 on a dump and the car was probably still choking because it can't get the exhaust out. Pressure drop across the turbo is very important, especially in drag racing. It's all or nothing and you want the turbo to get up to speed as fast as possible and stay there. I think the gains on the back end were purely less shifting and therefore less slow time for the turbo. I think a 3" exhuast, downpipe back will kill those numbers.
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Originally Posted by timzcat
Huh, huh... You got spanked.
I like the 10.99 in the far lane.
I am just joking with you.
The downpipe has to go. 2.5 is toooo small, especially with a stock cat and what sounds like stock exhaust?
You left at 5700 on a dump and the car was probably still choking because it can't get the exhaust out. Pressure drop across the turbo is very important, especially in drag racing. It's all or nothing and you want the turbo to get up to speed as fast as possible and stay there. I think the gains on the back end were purely less shifting and therefore less slow time for the turbo. I think a 3" exhuast, downpipe back will kill those numbers.
I like the 10.99 in the far lane.
I am just joking with you.
The downpipe has to go. 2.5 is toooo small, especially with a stock cat and what sounds like stock exhaust?
You left at 5700 on a dump and the car was probably still choking because it can't get the exhaust out. Pressure drop across the turbo is very important, especially in drag racing. It's all or nothing and you want the turbo to get up to speed as fast as possible and stay there. I think the gains on the back end were purely less shifting and therefore less slow time for the turbo. I think a 3" exhuast, downpipe back will kill those numbers.
Yea, I got spanked....just watch the video on the first page
My question is though...On my run last year I pulled a 13.2@104 with just the Intake, Muffler Delete Pipe and Dynoflash and I was boostin 17-18psi and tapering to 15-16 due to the Muffler Delete pipe...since then I added the Walbro Pump, 2.5"DP and a MBC and am boosting 21psi and tapering to 20psi and ran a 13.2@106 .....so the Pump, Downpipe and boosting 4-5 more psi and only worth 2mph? Just curious...
