1/8th mile shakedown
- Thread starter Aeroking
- Start date
WyoSyclone
Active member
Re: 1/8th mile shakedown
We had found on Syclone0209's Sy that his air filter (unsupported), connected to his cobra was flexing towards the rear of the car and causing the cobra to collapse, shutting off air flow... you might just want to double check that if yours is set up with just a filter off of the cobra...
We had found on Syclone0209's Sy that his air filter (unsupported), connected to his cobra was flexing towards the rear of the car and causing the cobra to collapse, shutting off air flow... you might just want to double check that if yours is set up with just a filter off of the cobra...
Aeroking said:
Aeroking
e.i.
Re: 1/8th mile shakedown
i did a test launch at 4psi. i sat WOT on the converter for 9 seconds.
sec 1 - 2100@100kpa to 2300@106kpa - 14.7afr
sec 2 - 2300@106kpa to 2400@111kpa - 14.7afr
sec 3 - 2400@111kpa to 2400@114kpa - 15.1afr
sec 4 - 2400@114kpa to 2400@115kpa - 15.1afr
sec 5 - 2400@115kpa to 2500@118kpa - 13.9afr
sec 6 - 2500@118kpa to 2600@121kpa - 13.1afr
sec 7 - 2600@121kpa to 2600@124kpa - 12.9afr
sec 8 - 2600@124kpa to 2700@126kpa - 12.8afr
sec 9 - 2700@126kpa to 2800@129kpa - 12.7afr
i did a test launch at 4psi. i sat WOT on the converter for 9 seconds.
sec 1 - 2100@100kpa to 2300@106kpa - 14.7afr
sec 2 - 2300@106kpa to 2400@111kpa - 14.7afr
sec 3 - 2400@111kpa to 2400@114kpa - 15.1afr
sec 4 - 2400@114kpa to 2400@115kpa - 15.1afr
sec 5 - 2400@115kpa to 2500@118kpa - 13.9afr
sec 6 - 2500@118kpa to 2600@121kpa - 13.1afr
sec 7 - 2600@121kpa to 2600@124kpa - 12.9afr
sec 8 - 2600@124kpa to 2700@126kpa - 12.8afr
sec 9 - 2700@126kpa to 2800@129kpa - 12.7afr
Aeroking
e.i.
Re: 1/8th mile shakedown
ran the 1/4 this evening. ran 4 consistant 13.7s @ 100mph.
i did my first run on my current AFRs, next run i went .50 AFR leaner. the next run i ran the AFRs .50 richer then the first run (1.0 richer then the 2nd run).
no change in times, or mph's.
i've noticed 2 problems. First my obvious of trouble spooling on the line. i've been launching at 110-115kpa. and cant break anything above that. I've launched at 14.2AFR, then 13.6AFR, with no change.
2nd problem is my trans is built to shift at 5500rpms. but for some reason my engine wont rev that high. it revs to 4800-5000 and flatlines for a second or more, then shifts, and flatlines the rpms again for a second or 2 before it shifts again
any ideas on the shifting rpm issues?
boost didnt fall off on the far end. the turbo quiets down in 4th gear, but the boost is still there.
ran the 1/4 this evening. ran 4 consistant 13.7s @ 100mph.
i did my first run on my current AFRs, next run i went .50 AFR leaner. the next run i ran the AFRs .50 richer then the first run (1.0 richer then the 2nd run).
no change in times, or mph's.
i've noticed 2 problems. First my obvious of trouble spooling on the line. i've been launching at 110-115kpa. and cant break anything above that. I've launched at 14.2AFR, then 13.6AFR, with no change.
2nd problem is my trans is built to shift at 5500rpms. but for some reason my engine wont rev that high. it revs to 4800-5000 and flatlines for a second or more, then shifts, and flatlines the rpms again for a second or 2 before it shifts again
any ideas on the shifting rpm issues?
boost didnt fall off on the far end. the turbo quiets down in 4th gear, but the boost is still there.
Aeroking
e.i.
Re: 1/8th mile shakedown
alright. give me a call later this week. and i'll come up.
wasnt the best track conditions either. also, the lights were malfunctioning, so we were running a pro-tree. lol, lots of fun. :tup: as long as your not a turbo truck trying to spool at the line.
CLONE said:
alright. give me a call later this week. and i'll come up.
wasnt the best track conditions either. also, the lights were malfunctioning, so we were running a pro-tree. lol, lots of fun. :tup: as long as your not a turbo truck trying to spool at the line.
Last edited:
Re: 1/8th mile shakedown
As for spooling off the line, I am having similar issue with the T72.
http://www.syty.net/forums/showthread.php?t=60500
I haven't try removing timing yet, haven't drove it since. In a few weeks when it get cooler I will start at it again.
You can see it didn't launch for *hit on my last 11.8 run. (1.9 60')
http://www.youtube.com/watch?v=_-bnMnRnqqk
For me, the boost fall of about 4-5lb when the TC lockup. To fix this, I am going try retarding timing where the RPM and boost at lockup. Also going to raise the shift point via the shift governor, shifting at 5100 going try 5500.
Keep posting your progress.
Aeroking said:
As for spooling off the line, I am having similar issue with the T72.
http://www.syty.net/forums/showthread.php?t=60500
I haven't try removing timing yet, haven't drove it since. In a few weeks when it get cooler I will start at it again.
You can see it didn't launch for *hit on my last 11.8 run. (1.9 60')
http://www.youtube.com/watch?v=_-bnMnRnqqk
For me, the boost fall of about 4-5lb when the TC lockup. To fix this, I am going try retarding timing where the RPM and boost at lockup. Also going to raise the shift point via the shift governor, shifting at 5100 going try 5500.
Keep posting your progress.
