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Posts Made By:
Tim Corcoran
Forum:
Pontiac - Street
04-14-2024, 11:23 PM
Replies:
21
Scorpion Endurance Lifters
Views:
1,171
Posted By
Tim Corcoran
Cliff, what was the year when you found these...
Cliff, what was the year when you found these Scorpion rocker failures.
Forum:
Pontiac - Street
04-14-2024, 05:05 PM
Replies:
4
Pontiac V8 Lifter questions
Views:
351
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 - Street
04-11-2024, 10:49 PM
Replies:
35
Holley Street Dominator Manifold?
Views:
1,306
Posted By
Tim Corcoran
Steve, it was Dave Bischop from SD Performance...
Steve, it was Dave Bischop from SD Performance that did the port work and provided the design for the foundry that was casting it. Dave was somewhat unhappy with the results he said it could of been...
Forum:
Pontiac - Street
04-11-2024, 10:42 PM
Replies:
30
Best vacuum advance distributor to trigger MSD box.
Views:
798
Posted By
Tim Corcoran
So it has a vacuum port on the distributor?
So it has a vacuum port on the distributor?
Forum:
Pontiac - Street
04-11-2024, 09:02 PM
Replies:
30
Best vacuum advance distributor to trigger MSD box.
Views:
798
Posted By
Tim Corcoran
I don't believe the Progression has a vacuum...
I don't believe the Progression has a vacuum advance. Not sure I would want to drive a street a car on the street without vacuum advance.
Forum:
Pontiac - Street
04-09-2024, 09:10 PM
Replies:
30
Best vacuum advance distributor to trigger MSD box.
Views:
798
Posted By
Tim Corcoran
I am using an OEM distributor with a Petronix...
I am using an OEM distributor with a Petronix conversion and an MSD 6AL. Works great for me and the price is right.
Forum:
Pontiac - Race
04-09-2024, 06:16 PM
Replies:
13
Anyone install baffles in factory gas tank?
Views:
498
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
PAC 1243 Valve Springs
Views:
456
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 - Street
04-07-2024, 01:22 PM
Replies:
21
Scorpion Endurance Lifters
Views:
1,171
Posted By
Tim Corcoran
I did a search and found some failures but that...
I did a search and found some failures but that was several years ago. As stated maybe they have improved the product and maybe they are more reliable now, or maybe I should just open up my wallet...
Forum:
Pontiac - Race
04-07-2024, 01:07 PM
Replies:
19
PAC 1243 Valve Springs
Views:
456
Posted By
Tim Corcoran
All the open pressures are pretty much in the...
All the open pressures are pretty much in the ball park. But the pressure on the seat varies from 220 to 268. If I shim up the springs that are low on the seat then the open pressure will be...
Forum:
Pontiac - Street
04-07-2024, 01:52 AM
Replies:
21
Scorpion Endurance Lifters
Views:
1,171
Posted By
Tim Corcoran
Sorry, I meant to say the Scorpion Endurance...
Sorry, I meant to say the Scorpion Endurance Rocker Arms, not lifters
Forum:
Pontiac - Race
04-07-2024, 01:50 AM
Replies:
49
Dyno Time
Views:
1,710
Posted By
Tim Corcoran
945 HP 790 TQ
945 HP 790 TQ
Forum:
Pontiac - Race
04-07-2024, 01:40 AM
Replies:
19
PAC 1243 Valve Springs
Views:
456
Posted By
Tim Corcoran
I bought them through a retailer and not sure if...
I bought them through a retailer and not sure if I should go through the retailer or go to PAC directly. I will call PAC on Monday and see what they say. I just don't want to go through the trouble...
Forum:
Pontiac - Race
04-06-2024, 04:30 PM
Replies:
19
PAC 1243 Valve Springs
Views:
456
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 - Race
04-06-2024, 01:10 PM
Replies:
19
PAC 1243 Valve Springs
Views:
456
Posted By
Tim Corcoran
PAC 1243 Valve Springs
Got a new set of PAC 1243 springs and I checked half of the springs and decided to stop because I think I will be returning the springs.
Installing them at 1.850 and 2.215 open
On the seat...
Forum:
Pontiac - Street
04-06-2024, 10:28 AM
Replies:
21
Scorpion Endurance Lifters
Views:
1,171
Posted By
Tim Corcoran
Scorpion Endurance Lifters
Does anyone have any experience with these lifters good or bad?
Forum:
Pontiac - Race
04-04-2024, 10:23 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
Yeah I already check the clearance and it's good....
Yeah I already check the clearance and it's good. My machinist made the same recommendation. Thanks
Forum:
Pontiac - Race
04-04-2024, 09:48 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
The designer of the cam is gone now but, Bullet...
The designer of the cam is gone now but, Bullet knows Ultraydyne cams as well an anybody . Tim at Bullet worked for Harold for several years. Bullet highly recommended to run 1.65 and they...
Forum:
Pontiac - Race
04-03-2024, 10:17 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
Silly me, I was going to have the spring seats...
Silly me, I was going to have the spring seats machined. I took my heads to my machinist to have them machined and walked out with a set of +.050 valve locks. I'll put them on the exhaust valves only.
Forum:
Pontiac - Race
04-02-2024, 04:24 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
It looks like I am going to have the spring seats...
It looks like I am going to have the spring seats machined, on the exhaust side only so I can get the PAC 1243 springs installed at 1.850. Because the intake valves are .060 longer than the exhaust...
Forum:
Pontiac - Race
04-01-2024, 08:53 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
Thanks for the tip Skip, If one is 10lbs off do I...
Thanks for the tip Skip, If one is 10lbs off do I send it back or just put in another shim
Forum:
Pontiac - Race
04-01-2024, 04:46 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
I need to do my geometry, I know
I need to do my geometry, I know
Forum:
Pontiac - Race
04-01-2024, 03:33 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
I appreciate everyone's comments. I decided not...
I appreciate everyone's comments. I decided not to use these springs, I ordered a set of PAC 1243 springs and will install them at 1.850. I talked to Bullet and they recommended the springs and...
Forum:
Pontiac - Race
03-31-2024, 04:42 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
I was doing some reading on this subject and...
I was doing some reading on this subject and found out that I was calculating the valve spring pressure without taking into consideration the stepped retainer. I have dual springs and the retainer...
Forum:
Pontiac - Race
03-31-2024, 01:13 PM
Replies:
24
Valve Spring Pressure
Views:
812
Posted By
Tim Corcoran
Chuckie Has the valvetrain been lightened up at...
Chuckie
Has the valvetrain been lightened up at all? Is this with stainless valves and steel retainers? What is your lift and duration?
Showing results 1 to 25 of 500
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