Timing is set, car runs great at idle. Plugs look great so I am getting the proper amount of fuel. However when I go down the track it has no power. We have checked for vacuum leaks and cannot fine any. Any ideas?

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Is it running smooth and just down on power?

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Joshua

It it is running smooth at idle, it starts running rough in the higher RPM range. The motor is newly rebuilt for drag racing. It has the Erson .510 lift cam in the motor.

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Can you give us a run-down of the entire engine package? Carb to exhaust.

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Joshua

-650 Holley Carb
-Clifford Intake
-Head- Ford valves, port & polished, 1.5 Cox roller rocker set, head cut to the max (either .100 or .120 off the head)
-Log rod motor with cast 2.2L pistons
-Summit SFI balancer
-Hooker comp headers, 3 & 3
-13:1 compression ratio
- Erson .510 lift cam

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I'm leaning toward ignition breakdown as running the carb out of fuel would more likely shut off the engine or show up just in the higher gears.

I'd check the coil, primary and secondary wires and also the rotor to cap phasing.

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Joshua

Or it could be over timed, such as more than 30 degrees will cause the motor to go flat. I just learned that lesson getting ready for the track. My motor didn't ping but fluttered and acted like it was dying out.

Your situation would be critical, especially with a motor build like yours, it would be more dramatic.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

Hey Crazy
Talk to us about the dizzy and rest of ignition. Are you running vacum advance or is it locked out? Hei ,EI, or MSD????
Also as you start your run are you launching good, ie is it starting out good the going rough down track?
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Running a MSD6AL, MSD Blaster coil. The distributor is not locked. The car does not like any RPM at all, so it is not launching very good.

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So even sitting it doesnt like to rev? If thats the case I would look at your timing. What is it set at? Has this engine run good before?
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Did you degree the cam?

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V8?? We don't need no stink'n V8!!

With the car in park the engine revs fine, when I put the engine under load is when I have the issue.

The cam was degreed in per the cam card from Erson.

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How many degrees of total timing are you running?
and what is the initial timing set at?
What springs are you running in the distributor? If they are the MOPAR racing springs you could be bouncing off the slots........

Hopefully there is no vacuum advance and you have the line plugged.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

If you don't mind me asking what kind of fuel system are you running as far as pump and fuel line size

Total Timing, we have been between 24 degrees and 38 degrees trying to get the thing to run...

Initial timing was set at 12 degrees.

I am not sure about the distributor. It has the same distributor that was in the car when Charles had the car.

Their is no vacuum advance and the line has been plugged...

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