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Search took 0.04 seconds. Search: Posts Made By: Tim Corcoran
Forum: Pontiac - Race 06-14-2024, 08:09 PM
Replies: 124
Views: 12,632
Posted By Tim Corcoran
Always make sure you verify you have enough...

Always make sure you verify you have enough clearance between the piston and the valve. With head gasket installed and head torqued, not full torque but you should at least partially crush the head...
Forum: Pontiac - Street 06-14-2024, 10:50 AM
Replies: 8
Views: 419
Posted By Tim Corcoran
https://butlerperformance.com/i-31643666-butler-ex...

https://butlerperformance.com/i-31643666-butler-exclusive-pontiac-std-hyd-lifter-set-hlj-951-16.html?ref=category:1234799
Forum: Pontiac - Street 06-13-2024, 09:59 PM
Replies: 40
Views: 875
Posted By Tim Corcoran
If you ever plan to race it with slicks often or...

If you ever plan to race it with slicks often or plan to upgrade for more power then get a forged crank
Forum: Pontiac - Street 06-13-2024, 09:25 PM
Replies: 40
Views: 875
Posted By Tim Corcoran
I ran a 4.25 Eagle cast crank in a 455 and raced...

I ran a 4.25 Eagle cast crank in a 455 and raced it for many years in a 3550 race weight 65 Lemans making around 650 HP and going low 10's. It finally went and took out the block crank rod and...
Forum: Pontiac - Street 06-11-2024, 11:03 PM
Replies: 43
Views: 1,262
Posted By Tim Corcoran
I have to ask, did you use the same machinist...

I have to ask, did you use the same machinist each time you rebuilt the engine? Gapless rings are a little finicky I know I have used them in the past. They need a special finish to work correctly....
Forum: Pontiac - Street 06-02-2024, 07:52 PM
Replies: 32
Views: 1,327
Posted By Tim Corcoran
It depends on your bearing clearances. If factory...

It depends on your bearing clearances. If factory clearances 10-30 is recommended with a little more clearance 10-40 or 15-40
Forum: Pontiac - Race 06-01-2024, 05:17 PM
Replies: 124
Views: 12,632
Posted By Tim Corcoran
I just finished installing the Ultradyne solid...

I just finished installing the Ultradyne solid roller cam and the new Butler Pro Billet Timing Set, Billet Gears 9 Keyway Crank Sprocket .005 Short. Since the engine was line honed the standard...
Forum: Pontiac - Race 05-25-2024, 11:08 PM
Replies: 124
Views: 12,632
Posted By Tim Corcoran
More photos

More photos
Forum: Pontiac - Race 05-25-2024, 11:06 PM
Replies: 124
Views: 12,632
Posted By Tim Corcoran
After file fitting the rings I moved on to...

After file fitting the rings I moved on to hanging the pistons on the rods and installing the rods and pistons into the engine. An important item to be extra careful with. The rods have a chamfer on...
Forum: Pontiac - Race 05-24-2024, 12:21 PM
Replies: 124
Views: 12,632
Posted By Tim Corcoran
I have been out of the country on a long term...

I have been out of the country on a long term business trip and now getting back to finishing this engine up. I am currently file fitting the rings. I have Total Seal classic style rings. The...
Forum: Pontiac - Street 05-16-2024, 01:41 PM
Replies: 87
Views: 3,443
Posted By Tim Corcoran
Although different view points were expressed and...

Although different view points were expressed and a controversial topic everyone has been respectful of others. We have great people on this board. Personally I believe Lake did a good job of...
Forum: Pontiac - Street 05-15-2024, 05:14 PM
Replies: 87
Views: 3,443
Posted By Tim Corcoran
I knew posting this would create some...

I knew posting this would create some controversy. Advertising is a powerful tool and it works the same as the propaganda our government puts out, and most people eat it up like ice cream. Every word...
Forum: Pontiac - Street 05-13-2024, 09:45 AM
Replies: 87
Views: 3,443
Posted By Tim Corcoran
Engine Oil Additives

This video may change your mind about certain oil additives. The part I like the most about this video is when he said, if you need an oil additive then you have the wrong oil.
...
Forum: Pontiac - Street 05-09-2024, 07:10 AM
Replies: 32
Views: 1,901
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 05-05-2024, 05:19 PM
Replies: 10
Views: 641
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 04-29-2024, 03:12 AM
Replies: 4
Views: 459
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, 03:42 AM
Replies: 20
Views: 1,269
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 04-22-2024, 11:09 PM
Replies: 20
Views: 1,338
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, 02:34 PM
Replies: 124
Views: 12,632
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...
Forum: Pontiac - Street 04-19-2024, 10:34 PM
Replies: 55
Views: 4,376
Posted By Tim Corcoran
The small filter at the entrance of a Q-Jet is a...

The small filter at the entrance of a Q-Jet is a restriction even with the paper filter. There just isn't enough surface area in that tiny filter. I never run a filter there I use an external...
Forum: Pontiac - Street 04-14-2024, 05:05 PM
Replies: 4
Views: 513
Posted By Tim Corcoran
The Butler lifters that Jay recommended are...

The Butler lifters that Jay recommended are Hy-Lift Johnson lifters and made in the USA they are a good lifter. If I were ever to go with flat tappet lifters again I would go with a solid cam and...
Forum: Pontiac - Race 04-09-2024, 06:16 PM
Replies: 18
Views: 1,273
Posted By Tim Corcoran
Another option is a new tank with an in tank...

Another option is a new tank with an in tank electric fuel pump. No more problems with fuel delivery and the tank looks stock. Tanks Inc sells them and not as pricey as you might think.
Forum: Pontiac - Race 04-09-2024, 01:40 PM
Replies: 19
Views: 977
Posted By Tim Corcoran
OK here's the deal. I went back and checked every...

OK here's the deal. I went back and checked every single spring and at 1.85 (IH) I'm getting between 258-268 and at net lift from 608-618. I am very happy with these numbers, not sure why I came up...
Forum: Pontiac - Race 04-06-2024, 04:30 PM
Replies: 19
Views: 977
Posted By Tim Corcoran
Chuck First off Bullet Cams knowing Ultradyne...

Chuck
First off Bullet Cams knowing Ultradyne cams and having specific knowledge of my cam recommended the PAC 1243 springs installed at 1.85 with 1.65 rockers. Bullet also said .070 is the ideal...
Forum: Pontiac - Street 03-23-2024, 05:06 PM
Replies: 58
Views: 2,933
Posted By Tim Corcoran
On Comp's website for the 85701 Lifter, Travel:...

On Comp's website for the 85701 Lifter, Travel: .150 in, Recommended Preload: .100 in
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