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Author Topic:   Help! I've got a problem
Dirt Full Roller

Total posts: 32
posted July 04, 2005 03:27 AM  
Ok, my car seems to load up alot now on gas. My bomber class has added a restrictor plate to our engines keeping them basically stock and running 9.5:1 compression. I am wondering if I need to jet down a size or two because of this or is something else causing my problem? If I need jets what is recommended on a GM motor? My car also only turns roughly 5300 RPM. I would like to see something around 6000 RPM. I believe I am running a 2.56 gear in my mid 70's Monte Carlo with 255/60's on the left side and 235/70 on the right. Is there a better tire setup for me or does this sound about right? Also, how can I check for sure on my gear ratio? I also have my motor timed in at 32 degrees on the high banked 1/4 mile track should I try and bump it up to 36 degrees? My car seems to have plenty of power in the corners but loads up on restarts and is very boggy on the top end and losses power on the straits. Could my coil in my distributor be a problem? Thanks for any helpful advice I know I am asking alot.


Steve Dupree
Dirt Freak

Total posts: 316
posted July 04, 2005 04:34 AM  
Nick as long as your not running hot i would move timing up between 34 to 37. Just go down slowly on jet size as not to get to lean. As far as a size it depends on your motor,altitude and even humidity in your area just up timing say to 35 and go down say from a 74 to a 72 jet size if thats what you are using. Usually if boggy on top end is a sign of to much jet good luck and good racing

Dirt Forum Champ
Total posts: 5390
posted July 04, 2005 12:45 PM  
Nick, check your PM.

Dirt Full Roller

Total posts: 32
posted July 08, 2005 05:24 PM  
Hey guys, thanks for the replys. I took my carb off and noticed that I was sucking in some silicone. Hopefully this weill help things out. I have also replaced my air cleaner and fuel filters. The jets I am running are only 52's something in the upper 60's to 70's would really richen me up wouldn't they? Also, the coil on my car has been ran for 3 years should that be replaced at this time? I have also purchased a 245/60 to run on the RR. And lastly, yes, I am running a TH-350!

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