Klaus, I have .53 jets in the center carb. In the end carbs I have a .51 and .52 . I have plugs in the end carbs power valve holes. A 6.5 power valve in the center carb.

  Dennis in Lititz PA

hi, iam stating to put together 3x2 setup for my 272 and i have a few questions ,what jets size are you running now? How about the power valve in the center carb??

I didn't know I had an ignition problem. It ran fine up to 2500 rpm's. It missed or died after that and I figured it was when the outside carbs came in.

The truck gets trailered if the race is far away.

Billy's brother Dan, when he heard me get on it said you'd better check the points. Between that and the rotor problem I think most of the problem was electrical. I put the smaller jets back in this morning.

  Dennis in Lititz PA

I ran an 18.05 against Ted , hitting the brakes at the finish line because I beat him to the finish line. Only thing is I dialed an 18.70. I'm sure I'm in the 17's now it's running great.

  Dennis in Lititz PA

GooD GrieF, Dennis! I don't recall your mentioning an ignition miss, too. After your previous reports of how the engine was running with your jetting efforts, I'm surprised that you were able to make the trip.

Anyway, from the peanut gallery, I'm still scratching my head regarding the low vacuum readings that you reported at idle speed and as you increased the engine rpm up to 2,000.

You are in the company of a large contingent of wise men at Columbus. Certainly individuals like Ted Eaton, Jerry Christenson, and Harry Hutton, to name only a few, should have a sense of what is to be expected with the cam profile that you're running and the camshaft timing orientation you have effected. I have never messed with advancing or retarding the camshaft event in relation to the crank.

Thanks for the update on getting the tuning of your new build sorted out.

Best Wishes...

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

Harry noticed the distributor cap moving at idle. When we pulled the cap off, the top tab on the rotor was burned off. Put the old one back on and he said it fit too loose. Put some masking tape on the shaft and then put the rotor on. Closed the point gap a little.

  Dennis in Lititz PA

Did a timing light tell the story?
Great to hear that it's back to good health.

Well, all the wise men in Columbus helped me get the truck running without missing. It wasn't the jets. Rotor and points. I'll post a picture when I get home. I'm doing this with a kindle and am limited.
I need to go back to smaller jets tomorrow.

  Dennis in Lititz PA

I drilled out two pairs of .48's and one pair of .51's to .54 so I have three sets of .54's. Put them in today and they ran worse. I have to drive about two miles to get home after getting on it before I can check the plugs. 1 and 5 looked the blackest - not the porcelain but inside the plug. I have some .53's and .52's to try next.

  Dennis in Lititz PA

find someone to bore the carb out to 1&3/16 like they did in the old days and jet them up!!! good luck.

 lincoln/merc. y-blocks &mel's                                                               bucyrus, ohio.