Particulars:
new cam, new head (the car not me), higher compression 9.5:1,
cam is dialed in, has more lift, slightly more duration than
stock. .020 over pistons (been in the car for 5 years)
Good compression, 145lbs at 5000 feet of elevation on all cyls.
Got a miss at idle, vacuum gauge reads 8-10 lbs
Here's the deal. I think I got a vacuum leak. I hear a LOUD
hiss coming from the carbs, which sounds like the leak. It
comes from the diaphram vent hole. It's high pitched and if
I cover the hole with my finger (both carbs) engine speed increases
and seems to smooth out a bit.
Do I have bad diaphrams? I'll be replacing them tonight, but was
wondering what else I should be looking at. Any insight would be
great!
Cheers,
-Scotty '75TR6
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