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Old 09-07-2024, 03:08 PM   #7
AngryPirate
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Join Date: Jan 2012
Location: Austin, TX
Posts: 562
Re: Holley 2300 2 barrel carburetor question

So, I finally got to get back into it.

I got one of those spark plug piston stop bolts to put into the #1 cylinder to find TDC.

I think somethings off.

The yellow lines are the stops and the middle is supposedly TDC.

Also, I noticed that the vacuum coming out of the metering port at idle (it was 1000 rpm which I know is high for these engines) was reading 5 in Hg.

I would’ve expected that to be closer to zero ¯\_(ツ)_/¯

Any thoughts on the TDC being off (at least I think it’s considered off. Ignore the positioning needle, I would’ve expected the pulley “1” marking to match the orange line.

Thanks for any ideas / help.
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