Forum: Pontiac - Street
09-06-2023, 11:48 PM
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Replies: 26
Views: 1,422
Since you have the 455. put 6x-4 heads and a...
Since you have the 455. put 6x-4 heads and a Summit 2801 cam in it. Since you have the TH-350, put the lower 1st and 2nd gear set in it along with the better sprag and a TransGo shift kit. Stock...
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Forum: Exhaust TECH
08-17-2023, 01:26 AM
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Replies: 1
Views: 687
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Forum: Pontiac - Street
04-24-2023, 06:45 PM
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Replies: 15
Views: 683
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Forum: Pontiac - Street
04-23-2023, 07:20 PM
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Replies: 15
Views: 683
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Forum: Pontiac - Street
04-23-2023, 07:17 PM
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Replies: 15
Views: 683
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Forum: Pontiac - Street
04-22-2023, 09:58 PM
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Replies: 15
Views: 683
1.675" Installed height on #13 heads
The machine shop that did the valve job and assembled my #13 heads set the installed height at 1.675". When I asked if the springs should be shimmed to 1.6" the guy said the Comp 988 springs had...
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Forum: Pontiac - Street
04-08-2023, 07:25 PM
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Replies: 4
Views: 375
What P/S and Alt brackets for #13 heads
I'm in the process of swapping a pair of #13 heads in place of the 6X-8 heads on my 400 inch motor in my '73 LeMans. The '73 P/S and Alt brackets don't line up with the bolt holes in the #13 heads....
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Forum: Pontiac - Street
03-11-2023, 01:46 AM
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Replies: 43
Views: 3,979
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Forum: Pontiac - Street
02-23-2023, 11:07 PM
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Replies: 13
Views: 960
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Forum: Pontiac - Street
02-23-2023, 10:03 PM
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Replies: 13
Views: 960
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Forum: Pontiac - Street
02-23-2023, 09:58 PM
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Replies: 13
Views: 960
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Forum: Pontiac - Street
02-23-2023, 07:11 PM
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Replies: 13
Views: 960
Use what retainers with a Summit 2801 cam ?
I'm putting a Summit 2801 cam into a stock engine with # 13 heads. Using Comp 988 valve springs and rubber o-ring valve stem oil seals. Exhaust lift is .466 inch. Can I use stock valve spring...
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Forum: Pontiac - Street
02-23-2023, 03:31 AM
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Replies: 4
Views: 729
Retainer to valve guide clearance
Will there be enough valve spring retainer to valve guide clearance using the 2801 cam with stock 1.5 rockers ?. I'm using Comp 988 springs and o-rings for valve seals.
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Forum: Pontiac - Street
02-09-2023, 04:07 AM
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Replies: 5
Views: 857
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Forum: Pontiac - Street
02-05-2023, 02:36 AM
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Replies: 55
Views: 4,044
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Forum: Pontiac - Street
01-30-2023, 04:48 AM
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Replies: 8
Views: 748
Best HFT lifter available now for daily driver.
I purchased a '73 Le Mans with a recently (2019) rebuilt 400 engine which had a Howard's cam and lifter kit installed in it. (CL-410011-12). Comp Cams #988 springs and roller tip rockers. Valve...
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Forum: Pontiac - Street
01-28-2023, 11:13 PM
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Replies: 11
Views: 1,052
I changed the rear wheel cylinders on my '73...
I changed the rear wheel cylinders on my '73 lemans last week and the fluid that came out was orange, looked like rusty water. You may have water contamination in the rear brake fluid system.
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Forum: Pontiac - Street
01-25-2023, 11:41 PM
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Replies: 4
Views: 684
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Forum: Pontiac - Street
01-25-2023, 11:39 PM
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Replies: 44
Views: 3,641
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Forum: Pontiac - Street
01-09-2023, 11:01 PM
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Replies: 61
Views: 5,587
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Forum: Pontiac - Street
01-03-2023, 11:51 PM
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Replies: 61
Views: 5,587
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Forum: Pontiac - Street
12-31-2022, 06:06 PM
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Replies: 8
Views: 1,255
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Forum: Pontiac - Street
12-30-2022, 11:17 PM
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Replies: 8
Views: 1,255
Had a similar thing happen to me. Head gasket...
Had a similar thing happen to me. Head gasket leaked a little and motor started to idle rough. Torqued both heads down, many bolts moved 1/4 turn. Leak stopped and motor ran smooth.no problems after...
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Forum: Pontiac - Street
12-29-2022, 10:15 AM
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Replies: 13
Views: 1,171
Note that due to the big Intake valve size and...
Note that due to the big Intake valve size and the 30 degree seat used on most of the iron heads that I consider setting up the Intake springs for 130 to 135 psi the way to go.
The Exh valves can...
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Forum: Pontiac - Street
12-29-2022, 03:48 AM
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Replies: 13
Views: 1,171
670 heads vs # 13's
How much performance difference, if any, would there be between a set of 670's compared to a set of 13's,on a mild 400 build ?. 068, logs, Q-Jet. Both sets being stock, unmodified or both sets being...
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