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PY Online Forums - Bringing the Pontiac Hobby Together
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Showing results 1 to 11 of 11
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Posts Made By:
77poncho
Forum:
Pontiac - Street
10-23-2021, 07:43 AM
Replies:
15
varying chamber size.. problem???
Views:
1,347
Posted By
steve25
If he happens to have a need to pull out the...
If he happens to have a need to pull out the rocker studs just note that since they now screw in they go into the heads water jacket and need to be sealed with silicone gasket maker.
In fact when...
Forum:
Pontiac - Street
10-22-2021, 08:59 PM
Replies:
15
varying chamber size.. problem???
Views:
1,347
Posted By
mgarblik
Generally, when hard seats are installed,...
Generally, when hard seats are installed, especially on a budget, only the exhaust are done. That's not always the case as sometimes the new seats break into the intake pocket because of large valve...
Forum:
Pontiac - Street
10-22-2021, 01:22 PM
Replies:
15
varying chamber size.. problem???
Views:
1,347
Posted By
mgarblik
A little side note: Pontiac heads since they...
A little side note: Pontiac heads since they have fully machined combustion chambers tend to be pretty darn close to each other through a given head. Typically +- 1 cc. Of course lousy valve jobs...
Forum:
Pontiac - Street
10-22-2021, 12:19 PM
Replies:
15
varying chamber size.. problem???
Views:
1,347
Posted By
Tom Vaught
If we were within the 3cc band (highest to...
If we were within the 3cc band (highest to lowest) we ran it as there is more to compression ratio than just the Head CCs in the equation.
Head gaskets are not perfect. Piston heights are not...
Forum:
Pontiac - Street
10-22-2021, 10:26 AM
Replies:
15
varying chamber size.. problem???
Views:
1,347
Posted By
steve25
Pick a common spot on the chamber floor and...
Pick a common spot on the chamber floor and measure the difference from there to the deck to see how much that changes.
Forum:
Pontiac - Street
06-26-2021, 12:35 AM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
neill
NGK ur5 should work and use the smaller gap.035....
NGK ur5 should work and use the smaller gap.035. Taper seat. Are they dished pistons? Flat tops would give 9.5 compression. Prolly need pretty good fuel with that cam. I have similar combo with ram...
Forum:
Pontiac - Street
06-24-2021, 12:40 PM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
padgett
Just a thought but in my experience before about...
Just a thought but in my experience before about 1991 Delco ignitions were marginal at .060 and more reliable at .045.
Forum:
Pontiac - Street
06-24-2021, 12:37 PM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
Skip Fix
R45 TS (taper seat) or R45 TSX(Taper Seat...
R45 TS (taper seat) or R45 TSX(Taper Seat Extended tip) for the 0.060 factory gap on a 78 motor.
Forum:
Pontiac - Street
06-24-2021, 10:57 AM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
track73
I ran TS plugs in my first set of '71 no, 96...
I ran TS plugs in my first set of '71 no, 96 heads with no problems
Forum:
Pontiac - Street
06-24-2021, 05:37 AM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
steve25
With the early heads that are machined with the...
With the early heads that are machined with the flat for the crush gasket you can use the latter taper seat plugs also if your playing around with tip lenght for better flame travel and combustion,...
Forum:
Pontiac - Street
06-24-2021, 12:47 AM
Replies:
21
Spark Plugs tapered or not??
Views:
4,294
Posted By
Scott65
Tapered seat.
Tapered seat.
Showing results 1 to 11 of 11
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