Disappointing ET's with 408 - UPDATE
Update of your great reccomendations from this thread:
http://www.forabodiesonly.com/mopar/showthread.php?t=34341
A little history:
1st trip to track - Best time 13.95
afterwards, changed to new fuel pump, new spark plug wires
2nd trip to track - Best Time 13.42 (est)
afterwards, changed to Holley 750 DP with proform body
3rd trip to track - best time of 12.88
YOU WERE RIGHT!!! Car pulls much harder on top end with the Holley, and dropped over 1/2 second E/T!
Now we're talking! We had to cut the trip short at only 3 runs (13.12, 12.92, 12.88), as the timing chain cover was leaking a bit of coolant around the water pump inlet holes on the Drivers side. We let it cool, retightened, and it quit leaking. Hope I don't have to pull it off!
Launched were limited to 2500-3000 rpm, then feeding in the peddle off the line - traction limited. Afraid of slicks with an 8.25 rear!
I was introduced to a cool site for an online engine dyno http://www.speedwaybids.com/tech/ezonlinedyno.html
that indicated my E.T's are in the ballpark with my cam and compression. Should have pushed for 11:1, instead of my current 9.6:1. Been running 93 octane with no ping. Last fill up, I tried blending 1/4 tank 93, 3/4 tank 89 octane, still no ping!
I think there is another 0.300 to be had with tuning and better launches, but the online dyno indicates I may be hitting the limits of the motor. See attachment for details.
Also, I went the the Mopar Southern classic at the Atlanta Raceway (Nascar track), where that night they setup the pit road for 1/8 mile runs. Raced 10 times, won 8, and only lost to the same Chevelle because he jumped the start (arm drop). We stayed even the entire run, though. Below is pick of a Fox Body with slicks that I took easily.:-D We had to drive back on the track (wrong way) to get back to the starting line - How cool is that!
Update of your great reccomendations from this thread:
http://www.forabodiesonly.com/mopar/showthread.php?t=34341
A little history:
1st trip to track - Best time 13.95
afterwards, changed to new fuel pump, new spark plug wires
2nd trip to track - Best Time 13.42 (est)
afterwards, changed to Holley 750 DP with proform body
3rd trip to track - best time of 12.88
YOU WERE RIGHT!!! Car pulls much harder on top end with the Holley, and dropped over 1/2 second E/T!
Now we're talking! We had to cut the trip short at only 3 runs (13.12, 12.92, 12.88), as the timing chain cover was leaking a bit of coolant around the water pump inlet holes on the Drivers side. We let it cool, retightened, and it quit leaking. Hope I don't have to pull it off!
Launched were limited to 2500-3000 rpm, then feeding in the peddle off the line - traction limited. Afraid of slicks with an 8.25 rear!
I was introduced to a cool site for an online engine dyno http://www.speedwaybids.com/tech/ezonlinedyno.html
that indicated my E.T's are in the ballpark with my cam and compression. Should have pushed for 11:1, instead of my current 9.6:1. Been running 93 octane with no ping. Last fill up, I tried blending 1/4 tank 93, 3/4 tank 89 octane, still no ping!
I think there is another 0.300 to be had with tuning and better launches, but the online dyno indicates I may be hitting the limits of the motor. See attachment for details.
Also, I went the the Mopar Southern classic at the Atlanta Raceway (Nascar track), where that night they setup the pit road for 1/8 mile runs. Raced 10 times, won 8, and only lost to the same Chevelle because he jumped the start (arm drop). We stayed even the entire run, though. Below is pick of a Fox Body with slicks that I took easily.:-D We had to drive back on the track (wrong way) to get back to the starting line - How cool is that!