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Discussion Starter #1
I have a freshly rebuilt 289. The cam has a 224 duration(intake and exhaust) and a .333 Lobe lift. The Holley 650 DP is brand new, but I it is still running way rich. I have read that it could be an improperly rated power valve. Any Ideas would be greatly appreciated.

The backfires and sluggishness is getting annoying. The rest of my combo is listed below.

Also, is anyone running a similar combo, what kind of times are you running?


Rex
1966 GT 350 Clone
289 (rebuilt with JE, Eagle, Arp)
Edleborck RPM Heads
Comp Cams hyd roller, Crane 1.6 rockers,
Holley 650 DP, Hookers 1 5/8, T-10, 3:55 Gears, Custom Dual exhaust with X Pipe
 
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Discussion Starter #2
66 primary 71 secondary is a good place to start

Greg B
 

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Backfires will rupture power valves....

Required tools for operating a Vintage Mustang:
1. Duct Tape
2. J.B. Weld
3. B.F.H. (Big Fat Hammer)
4. VINTAGE MUSTANG FORUMS II
(Power is cheap, reliability costs money!)
 
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Discussion Starter #4
Thanks! I will try those jets. By the way, what are the stock Jets?

Also, Is there an area on this board where people post their track times. I am actually looking for others with a similar combo to mine to see how they are running. Any additional help would be appreciated.

Rex
1966 GT 350 Clone
289 (rebuilt with JE, Eagle, Arp)
Edleborck RPM Heads
Comp Cams hyd roller, Crane 1.6 rockers,
Holley 650 DP, Hookers 1 5/8, T-10, 3:55 Gears, Custom Dual exhaust with X Pipe
 
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