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Search took 0.08 seconds. Search: Posts Made By: Tim Corcoran
Forum: Pontiac - Race Yesterday, 08:31 AM
Replies: 11
Views: 239
Posted By Tim Corcoran
I would call Comp Cams and they should be able to...

I would call Comp Cams and they should be able to get you a cam card with all the specs.
Forum: Pontiac - Street Yesterday, 08:12 AM
Replies: 7
Views: 298
Posted By Tim Corcoran
You can get 400 HP using your 62 heads but they...

You can get 400 HP using your 62 heads but they will need some port work to get there. You will need to measure how far the pistons are in the hole, measure valve relief pockets, head gasket...
Forum: Pontiac - Street Yesterday, 07:54 AM
Replies: 10
Views: 272
Posted By Tim Corcoran
If you have an oxy acetylene torch put some...

If you have an oxy acetylene torch put some penetrating oil around the plug then heat the metal plug not the manifold use a small tip as to direct the heat to the center of the plug, get it good and...
Forum: Pontiac - Street 05-09-2024, 07:10 AM
Replies: 20
Views: 766
Posted By Tim Corcoran
The 67 GTO 400 360 HP engine came from the...

The 67 GTO 400 360 HP engine came from the factory with the 068 cam. This is a mild performance cam but improved performance over other factory cams. This cam works well with 9.0 to 9.5 compression...
Forum: Pontiac - Street 05-07-2024, 03:27 PM
Replies: 15
Views: 461
Posted By Tim Corcoran
Don't forget to change these ...

Don't forget to change these
...
Forum: Pontiac - Race 05-07-2024, 03:20 PM
Replies: 12
Views: 358
Posted By Tim Corcoran
That's a very fast MPH for a 10.89

That's a very fast MPH for a 10.89
Forum: Pontiac - Street 05-07-2024, 12:26 PM
Replies: 15
Views: 461
Posted By Tim Corcoran
If needed ...

If needed
...
Forum: Pontiac - Street 05-07-2024, 04:30 AM
Replies: 15
Views: 461
Posted By Tim Corcoran
The corrosion on the timing cover can be cleaned...

The corrosion on the timing cover can be cleaned up real good and fill the groove/pits with JB Weld and file smooth after hard. Depending on how bad the divider plate is corroded you may want to...
Forum: Pontiac - Street 05-05-2024, 05:19 PM
Replies: 10
Views: 506
Posted By Tim Corcoran
Even for a street car 1/2 turn isn't the golden...

Even for a street car 1/2 turn isn't the golden rule. Lifter companies recommend setting them at 1/2 the travel and they all have different amounts of travel. but some lifters make noise and you can...
Forum: Pontiac - Street 05-05-2024, 05:09 PM
Replies: 7
Views: 320
Posted By Tim Corcoran
The vent prevents suction that will prevent fuel...

The vent prevents suction that will prevent fuel delivery to the carb. With environmental concerns developing the vents went away and the vented caps where instituted by the government.
Forum: Pontiac - Street 05-04-2024, 09:14 AM
Replies: 6
Views: 610
Posted By Tim Corcoran
Butler sell valve cover gaskets in different...

Butler sell valve cover gaskets in different thicknesses they even have them in 5/16 thick.
...
Forum: Suspension TECH 05-03-2024, 03:14 AM
Replies: 37
Views: 1,204
Posted By Tim Corcoran
Oh no, 18" wheels on a GTO??? Yikes

Oh no, 18" wheels on a GTO??? Yikes
Forum: Pontiac - Street 05-03-2024, 03:11 AM
Replies: 14
Views: 1,394
Posted By Tim Corcoran
Those are some sweet Centerlines in the first...

Those are some sweet Centerlines in the first picture I hope your not replacing them for those black wheels I see in another picture. Did you do the port work on the heads? What is the purpose of...
Forum: Pontiac - Street 05-02-2024, 03:37 PM
Replies: 13
Views: 542
Posted By Tim Corcoran
Not to sound like a broken record but I converted...

Not to sound like a broken record but I converted both my 65 and 67 LeMans to a TH-400 and all I did is move it and drill it just like Ken said. I never noticed a height difference, not say it's not...
Forum: Pontiac - Street 05-02-2024, 04:52 AM
Replies: 8
Views: 453
Posted By Tim Corcoran
Reading the plugs on a street given car doesn't...

Reading the plugs on a street given car doesn't tell you much. Is it telling you idle, cruise or full throttle? As you said it may be rich at idle or low speed
Forum: Pontiac - Race 05-01-2024, 03:51 PM
Replies: 25
Views: 870
Posted By Tim Corcoran
I bought a new Victor several years ago and it...

I bought a new Victor several years ago and it sat too high with a Felpro .040 gasket. I checked the port alignment without the gasket and it looked perfect. So I put a small amount of silicone...
Forum: Pontiac - Street 05-01-2024, 03:21 PM
Replies: 23
Views: 856
Posted By Tim Corcoran
There are a few options What I would do is...

There are a few options

What I would do is figure your compression with an online compression calculator using a flat top piston and your planned bore size. Don't forget to include the number of...
Forum: Pontiac - Street 04-29-2024, 03:12 AM
Replies: 4
Views: 309
Posted By Tim Corcoran
I don't see a reason to go to the trouble and...

I don't see a reason to go to the trouble and expense of installing electric fan(s) on your car. The factory shrouds and clutch fan should do an excellent job of cooling a 400 cubic inch motor. If...
Forum: Pontiac - Street 04-25-2024, 12:06 PM
Replies: 20
Views: 1,100
Posted By Tim Corcoran
Back in the day there weren't much available for...

Back in the day there weren't much available for Pontiac after market rods so Jim Butler, and probably others figured out if you turn the Pontiac rod journal down to 2.2 you could use a BBC rod, but...
Forum: Pontiac - Street 04-25-2024, 06:00 AM
Replies: 20
Views: 1,100
Posted By Tim Corcoran
I was thinking the same thing because the ratio...

I was thinking the same thing because the ratio between intake and exhaust flow on a Pontiac engine is not great even on a ported E-head with upgraded 1.77 exhaust valves, yet they still make pretty...
Forum: Pontiac - Street 04-25-2024, 03:42 AM
Replies: 20
Views: 1,017
Posted By Tim Corcoran
My last build the chain was very loose and I...

My last build the chain was very loose and I tried a Rollmaster -.010 short I couldn't even get it installed. I exchanged it for a -.005 set and it fit tight with almost no slop. Sometimes a test fit...
Forum: Pontiac - Street 04-23-2024, 03:27 PM
Replies: 20
Views: 1,100
Posted By Tim Corcoran
I noticed the same thing about Spring pressure...

I noticed the same thing about Spring pressure that info is not correct. Even so it is a good video with some good entry level info. His second video on the same subject is also very good and a...
Forum: Pontiac - Street 04-22-2024, 11:09 PM
Replies: 20
Views: 1,100
Posted By Tim Corcoran
Cams Video

This is an interesting video and there is a part two that is good also

https://youtu.be/JPAeepqrY-0
Forum: Pontiac - Race 04-21-2024, 03:12 PM
Replies: 101
Views: 10,239
Posted By Tim Corcoran
The engine I built for my street car last year I...

The engine I built for my street car last year I used the BOP one piece rear main seal. I made the mistake of letting my machinist install it, thinking letting him do it was my best shot at getting a...
Forum: Pontiac - Race 04-21-2024, 02:34 PM
Replies: 101
Views: 10,239
Posted By Tim Corcoran
At the machine shop bearing clearances were...

At the machine shop bearing clearances were verified .026-.027 on the rods and the mains are .029-.031 and that is right about what I wanted. Prior to installing the rear main seal I checked the...
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