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Posts Made By:
Jay S
Forum:
Pontiac - Race
Today, 08:14 AM
Replies:
18
Summit racing drops speedmaster products
Views:
599
Posted By
Jay S
Good too see some integrity from Summit. I hope...
Good too see some integrity from Summit. I hope other company’s follow and SM loose’s a bunch of business and has too fight lawsuits for the many things they have stole. I know some like their E...
Forum:
Pontiac - Street
04-16-2024, 06:03 PM
Replies:
21
Scorpion Endurance Lifters
Views:
1,210
Posted By
Jay S
Scorpion made the rockers thicker at the fulcrum...
Scorpion made the rockers thicker at the fulcrum tips sometime around 2011. I imagine the rockers Charlie broke the fulcrum on and Cliff’s pictures were both made before that.
None of the...
Forum:
Pontiac - Street
04-16-2024, 11:11 AM
Replies:
21
Scorpion Endurance Lifters
Views:
1,210
Posted By
Jay S
If you didn’t know, Scorpion makes the rockers...
If you didn’t know, Scorpion makes the rockers arms for both Isky and Howard’s. Isky bodies are the endurance versions, Howard’s uses the race version. I think even Summit brand rockers are...
Forum:
Pontiac - Street
04-14-2024, 04:55 PM
Replies:
4
Pontiac V8 Lifter questions
Views:
370
Posted By
Jay S
I recall your engine builder went thru two sets...
I recall your engine builder went thru two sets of lifter before he found 16 lifters he was happy with the crown’s machining. If he has not done that you may have made it too 2000 miles. That type...
Forum:
Pontiac - Street
04-14-2024, 03:42 PM
Replies:
4
Pontiac V8 Lifter questions
Views:
370
Posted By
Jay S
I look on Ebay or other places that have old...
I look on Ebay or other places that have old stocks of NOS lifters before ordering new. If that falls thru I order these:
...
Forum:
Pontiac - Race
04-11-2024, 06:29 PM
Replies:
36
Pro Stock Pontiacs
Views:
1,357
Posted By
Jay S
The 500 cubes limit on prostock started around...
The 500 cubes limit on prostock started around 1981. Everything was based on weight per cid before that.
Forum:
Pontiac - Street
04-08-2024, 08:02 PM
Replies:
21
Scorpion Endurance Lifters
Views:
1,210
Posted By
Jay S
Bulter performance released their own 1.65 rocker...
Bulter performance released their own 1.65 rocker arm series that has more clearance for bigger spring retainers. They look a lot like endurance Scorpion, says made by Scorpion.
...
Forum:
Pontiac - Street
04-08-2024, 11:38 AM
Replies:
21
Scorpion Endurance Lifters
Views:
1,210
Posted By
Jay S
Even recently with in the last couple years, ...
Even recently with in the last couple years, Bulter’s don’t recommend Scorpions on big roller cams.
Fatigue life of aluminum parts depends on the forces applied to those parts. There is a lot...
Forum:
Pontiac - Street
04-06-2024, 09:26 PM
Replies:
21
Scorpion Endurance Lifters
Views:
1,210
Posted By
Jay S
Are you referring to rockers arms, or the SR...
Are you referring to rockers arms, or the SR lifters made by Johnson with cast iron bodies that are called Scorpion’s?
Forum:
Pontiac - Street
04-06-2024, 09:58 AM
Replies:
22
Best Radiator for a Street/Strip 75 Formula 400 Firebird.
Views:
833
Posted By
Jay S
Cold Case is what I have in my 77 TA. 550+ HP...
Cold Case is what I have in my 77 TA. 550+ HP street car…Nice radiator.
Forum:
Pontiac - Street
04-06-2024, 08:49 AM
Replies:
67
Diagnosing Loss in Performance and WOT Backfires
Views:
2,317
Posted By
Jay S
Yep, need know that too. The head were set up by...
Yep, need know that too. The head were set up by KRE though, I can probably tell him which retainers it has just from the spring IH.
Forum:
Pontiac - Street
04-06-2024, 08:16 AM
Replies:
67
Diagnosing Loss in Performance and WOT Backfires
Views:
2,317
Posted By
Jay S
I can help you with picking valve springs, just...
I can help you with picking valve springs, just need to know the IH of the springs. I don’t think you’re issue is with the valve springs though. It still sounds like your fuel pump won’t build...
Forum:
Pontiac - Street
04-06-2024, 08:07 AM
Replies:
59
Another hyd roller bites the dust
Views:
2,146
Posted By
Jay S
If it had a OF cam it would have had all magnum...
If it had a OF cam it would have had all magnum lobes. OF2 has more aggressive XR’s on the intakes
Forum:
Pontiac - Street
04-05-2024, 09:48 PM
Replies:
59
Another hyd roller bites the dust
Views:
2,146
Posted By
Jay S
Without getting too detailed on what you could do...
Without getting too detailed on what you could do different, for how yours failed, an improvement would be to have that HR cam ground on a 8620 core next go around. The 8620 surface is tougher, it...
Forum:
Pontiac - Street
04-05-2024, 08:36 AM
Replies:
37
Safety warning welding and brake cleaner. Never mix them!
Views:
1,227
Posted By
Jay S
Same here.
Same here.
Forum:
Pontiac - Street
04-05-2024, 08:02 AM
Replies:
59
Another hyd roller bites the dust
Views:
2,146
Posted By
Jay S
I didn’t write that quite correctly, the 5150...
I didn’t write that quite correctly, the 5150 (common HR’s) and 8660 are lesser quality cores than a 8620, but the hardening on those cores actually is deeper than a 8620. The issue is more the...
Forum:
Pontiac - Street
04-04-2024, 12:19 AM
Replies:
59
Another hyd roller bites the dust
Views:
2,146
Posted By
Jay S
It is doubtful you could save it anyway. Yes it...
It is doubtful you could save it anyway. Yes it is a Billet cam, but like most HR grinds from Comp it is one of the lesser quality billet 5150 or 8660 cores, the induction hardening is thinner than...
Forum:
Pontiac - Street
04-03-2024, 09:48 AM
Replies:
59
Another hyd roller bites the dust
Views:
2,146
Posted By
Jay S
In that first photo I thought it was looking kind...
In that first photo I thought it was looking kind of tough also.
Just from that first photo, it was not a better 8620 cam core, it is obviously not a cast cam core either. Looks like a 5150 ...
Forum:
Pontiac - Street
04-01-2024, 10:28 AM
Replies:
8
Another hybrid setup
Views:
454
Posted By
Jay S
HR lifters on the SR profiles that work ok are...
HR lifters on the SR profiles that work ok are generally higher ratio, high RPM SR profiles. The profiles that work ok are closer to what Steve posted, tend to look more like these:
Forum:
Pontiac - Street
04-01-2024, 09:46 AM
Replies:
8
Another hybrid setup
Views:
454
Posted By
Jay S
You won’t be able to run .020” lash and run less...
You won’t be able to run .020” lash and run less spring pressure, because it will take the same spring pressure as it would if you ran SR lifters with .020” lash.
The HR lifter will get beat...
Forum:
Pontiac - Street
03-31-2024, 08:50 AM
Replies:
81
Breaking in your new engine and Break In Oil
Views:
4,273
Posted By
Jay S
It is a little surprising Blueprint recommends...
It is a little surprising Blueprint recommends going 500 miles on the break in oil, I guess though if they recommend that with light loads for the first 500 it makes more sense. At some point the...
Forum:
Pontiac - Street
03-31-2024, 08:37 AM
Replies:
67
Diagnosing Loss in Performance and WOT Backfires
Views:
2,317
Posted By
Jay S
Good looking pumping numbers for your altitude. ...
Good looking pumping numbers for your altitude.
Sounds like you narrowed down the issue to fuel. Most likely the pump wore itself out and won’t pump enough pressure anymore.
Forum:
Pontiac - Race
03-31-2024, 07:51 AM
Replies:
24
Valve Spring Pressure
Views:
836
Posted By
Jay S
Do you know what the coil bind is on your...
Do you know what the coil bind is on your springs? 1.76” IH with 1.65s might be getting a bit tight? You may want to try to would shim the seat pressure so it is balanced out with a plus 050”...
Forum:
Pontiac - Street
03-30-2024, 10:59 AM
Replies:
81
Breaking in your new engine and Break In Oil
Views:
4,273
Posted By
Jay S
The added cylinder washing from carbureted...
The added cylinder washing from carbureted gasoline engines versus TBI, MPFI, and DI accounts for lot of the difference in modern stuff going extra miles over our old engines.
Forum:
Pontiac - Street
03-30-2024, 10:39 AM
Replies:
81
Breaking in your new engine and Break In Oil
Views:
4,273
Posted By
Jay S
I like oil analysis on timely intervals, but...
I like oil analysis on timely intervals, but don’t do it often these days, and are often behind on maintenance. We have a fleet of off road and road equipment, it is hard to keep up. I see the...
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