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Forum: Pontiac - Race 09-09-2021, 05:38 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Hanging my hat on a pair of them 0.080" thick...

Hanging my hat on a pair of them 0.080" thick Cometic gaskets to keep the Pump gas real.
Forum: Pontiac - Race 09-02-2021, 07:09 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Finally got the Pan on. 1-piece Pangasket TQd to...

Finally got the Pan on. 1-piece Pangasket TQd to 12 ft-Lbs. Checked and mostbolts relaxed to 9 ftLbs, so re-torqued to 12. Probably check again later huh.

Rotated engine upright, Put in Cam and...
Forum: Pontiac - Race 08-24-2021, 05:18 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Cam core has CWC cast. Just no informative...

Cam core has CWC cast. Just no informative stampings on either end.
Lifters had retaining wire, so i put my last set of C-Clips to the,.
Forum: Pontiac - Race 08-20-2021, 02:38 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
SUM-2821 cam arrived: white boxed, looks fine but...

SUM-2821 cam arrived: white boxed, looks fine but no identity stamped on the cam. hmmm.
SUMMIT Lifters arrived: Look fine but pump-up in oil bath not so firm. like .060" play left in each.
...
Forum: Pontiac - Race 08-17-2021, 08:47 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
I ordered .080" thick for 4.20" bore, and maybe...

I ordered .080" thick for 4.20" bore, and maybe shipps by mid-Sept. $300 for the pair.

Piston velocity from 4.21" Stroke should keep the quench alive.

Good ting i didn't drive to Norwalk (or...
Forum: Pontiac - Race 07-22-2021, 04:57 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
About 400 hp is fine. Any more up to 500 hp is...

About 400 hp is fine. Any more up to 500 hp is nice but I don't want any compromise in Reliability, high octance additcions, or valvetrain that won't surivive Summer highway.

I think 550+ hp is...
Forum: Pontiac - Race 07-22-2021, 07:28 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Forged crank, BME Rods (+1 GRP matched...

Forged crank, BME Rods (+1 GRP matched replacement). Good block.

Maybe best to trade this Flattop shortblock for a dished 455 shortblock!
Forum: Pontiac - Race 07-21-2021, 06:02 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Red face Pretty sure i use the 180 T-stats for best...

Pretty sure i use the 180 T-stats for best results. 160 being too cold, and 198 being stoopid hot.

Here's the short block status: Slugs keyed to Rods for thrust surface and valve relief. ...
Forum: Pontiac - Race 07-20-2021, 04:36 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Red face Getting ready to Slug the Rods. ...

Getting ready to Slug the Rods. Super-lightweight assy. Sharpie is a key scribe for coordinating these things. Spiralocks!!!
Forum: Pontiac - Race 07-19-2021, 06:39 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Both valve reliefs cut into the Top-Ring land. ...

Both valve reliefs cut into the Top-Ring land. But a Unibrow ? hmmmm
48s have been unshrouded;
Forum: Pontiac - Race 07-19-2021, 07:00 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
48s at 78 cc with Ram IV Valves. Not brave...

48s at 78 cc with Ram IV Valves. Not brave enough to eggshell up to 87cc.

My latest thought is to finish the shortblock, Top-end it, & break-in the cam on a super hobo stabilized engine Stand. ...
Forum: Pontiac - Race 07-17-2021, 02:13 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
@ Jay; my 9.0:1 is all joy on 87, 1/4 mile on 89...

@ Jay; my 9.0:1 is all joy on 87, 1/4 mile on 89 due to the cam (combo below), butt hay the little things going on like cutting the Sparkplug GND lugs back, HEL finness, Phat Carb Primaries. And...
Forum: Pontiac - Race 07-17-2021, 07:06 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Yes, all this matches my experience with...

Yes, all this matches my experience with Hi-Compr. Add humid summer days cause my HC to ping. Shows what "we-all" used to do 30 years ago. Aluminum Heads have the 0.5 to 3/4 point advantage. I'd...
Forum: Pontiac - Race 07-16-2021, 06:33 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Tally done. The CYLs lack the factory chamfer. ...

Tally done. The CYLs lack the factory chamfer. Wonder if i go long on unshrouding CYL chamfers.

Dang Slugs are at zero deck.
Forum: Pontiac - Race 07-16-2021, 06:50 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Alot there, thanks. My running engine has 38cc...

Alot there, thanks. My running engine has 38cc dish (Ross blower pistons) and figured 9.0:1 which is too low. Idles barely good enough but the rest of the performance is quite good, along with low...
Forum: Pontiac - Race 07-15-2021, 09:39 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Red face Piston are Light as possible already, so no...

Piston are Light as possible already, so no ability to dish. Doubled Head gaskets are more practical, or 98-117 cc heads.

Barely any top landing to consider; Eyebrows break into ring lands as it...
Forum: Pontiac - Race 07-15-2021, 04:58 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
I'm not worried about picking a cam. Cam worry...

I'm not worried about picking a cam. Cam worry is break-in and run long highways with all the lobes.

TWO headgaskets have crossed my mind, but the squish zone is like 80 mil at TDC.

We got the...
Forum: Pontiac - Race 07-15-2021, 07:18 AM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
All of the above make sense, and the most...

All of the above make sense, and the most relevant tells me it is harderin 2021 to ride the combo ping-free bubble than it was in the early 90s.

See here's the thing; sold my 5Cs to a fella (oh...
Forum: Pontiac - Race 07-14-2021, 07:54 PM
Replies: 65
Views: 15,910
Posted By Half-Inch Stud
Question Who drives a 455 withFlattops and Iron Ram Air Heads?

Working my Spare 455 +030, and have flattops and "48s".
BOP 1-piece Rear Seal in, Forger 4.21" Stroke, 3.25" Mains TQ'd with Factory Bolts. 1973 2-Bolt Block.

Wondering what Octane is needed to...
Showing results 1 to 19 of 19

 
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