jimmyray
Well-Known Member
- Joined
- Jul 17, 2007
- Messages
- 948
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I recently had issues with the distributor that actually turned out to be a bad ecu. Got that fixed, car running, but no power at top end, kicks back, stalls, etc at WOT.
340 engine, Comp Magnum 280 cam, headers, Edel performer intake with 625 carter. Supposedly a Clyes timing chain. Mileage is unknown, suspect 75,000 +.
I mapped the timing and this is what I found:
idle - 850 - 10 degrees BTDC
1500 10 " "
2000 8 " "
3000 8 " "
Yes, it actually LOSES timing as the rpm's increase. That explains a lot regarding the poor high rpm performance, eh?
I swapped in another distributor, just to be sure it was not it, and checked the oild pump gear in the meantime, which looked fine, very tight fit against the cam drive.
I suspect the timing chain, but would like your thoughts before pulling it down.
340 engine, Comp Magnum 280 cam, headers, Edel performer intake with 625 carter. Supposedly a Clyes timing chain. Mileage is unknown, suspect 75,000 +.
I mapped the timing and this is what I found:
idle - 850 - 10 degrees BTDC
1500 10 " "
2000 8 " "
3000 8 " "
Yes, it actually LOSES timing as the rpm's increase. That explains a lot regarding the poor high rpm performance, eh?
I swapped in another distributor, just to be sure it was not it, and checked the oild pump gear in the meantime, which looked fine, very tight fit against the cam drive.
I suspect the timing chain, but would like your thoughts before pulling it down.