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Search took 0.10 seconds. Search: Posts Made By: Jay S
Forum: Pontiac - Race Yesterday, 12:46 PM
Replies: 18
Views: 479
Posted By Jay S
BAM DLC coated steel bushed lifters have been...

BAM DLC coated steel bushed lifters have been providing a pretty consistent 4X longer service life than the bronze bushed type in the same applications where service life is a factor.

Service life...
Forum: Pontiac - Street 07-15-2026, 11:52 PM
Replies: 9
Views: 335
Posted By Jay S
If you sent it with a flywheel and don’t recall...

If you sent it with a flywheel and don’t recall which type it was, I think you’re probably out of luck on being able to tell which type it had. I have been around a ton of Pontiac’s that were...
Forum: Pontiac - Street 07-15-2026, 06:12 PM
Replies: 9
Views: 335
Posted By Jay S
If the balancing will be done by anyone other...

If the balancing will be done by anyone other than a Pontiac specific shop, it is the safest to neutral balancing it and buying an aftermarket neutral flywheel. I have ran into to many Pontiac’s that...
Forum: Pontiac - Street 07-02-2026, 03:17 PM
Replies: 10
Views: 509
Posted By Jay S
It depends on how the 400 is set up. What year....

It depends on how the 400 is set up. What year. Which heads. Compression. cam. ect. I have several cars with bigger 455+ cid engines that are decently economical to drive, up around 20mpg. Not...
Forum: Pontiac - Street 06-30-2026, 02:06 PM
Replies: 32
Views: 1,306
Posted By Jay S
You have the right idea. Rather than huge...

You have the right idea. Rather than huge changes, it is a mod that is a small improvement, but is something that I think it adds up to make a difference. Maybe it will gain 2 to 5 psi of oil...
Forum: Pontiac - Street 06-30-2026, 01:59 PM
Replies: 32
Views: 1,306
Posted By Jay S
That guy in the video had his oil restricted down...

That guy in the video had his oil restricted down to about 1 gpm with his .1” orifice before the oil even made it to the lifters. Maybe he had 2 plugs on each bank, maybe 2 gpm at most. Either way,...
Forum: Pontiac - Street 06-30-2026, 01:47 PM
Replies: 32
Views: 1,306
Posted By Jay S
The .040” orifice pushrod with a 50 psi pressure...

The .040” orifice pushrod with a 50 psi pressure gradient will flow 3.5 gpm thru 16 pushrods, at crusing speeds total flow of around 6 to 8 gpm there really won’t be much difference in oil volume to...
Forum: Pontiac - Street 06-30-2026, 09:25 AM
Replies: 32
Views: 1,306
Posted By Jay S
For HR lifter’s the reasoning to restrict the oil...

For HR lifter’s the reasoning to restrict the oil has more components to it than other lifter options like mechanical rollers or HFT’s. The restricted pushrod oiling is used sometimes to help nurse...
Forum: Pontiac - Street 06-18-2026, 11:36 PM
Replies: 84
Views: 3,406
Posted By Jay S
Did you see some Aluminum speckles anywhere? I...

Did you see some Aluminum speckles anywhere? I didn’t see any, but I am looking a cell phone screen. The speck’s I was noticing where yellowish dark brown, which I think is from the extra lead in...
Forum: Pontiac - Street 06-18-2026, 03:01 PM
Replies: 84
Views: 3,406
Posted By Jay S
I don’t see any signs of detonation on the plug...

I don’t see any signs of detonation on the plug photos. A couple of the plugs look like they have signs of some Lead fowling for some reason, but that isn’t going to be an issue going forward with...
Forum: Pontiac - Street 06-17-2026, 10:24 PM
Replies: 84
Views: 3,406
Posted By Jay S
I run a 7 heat range NGK on my TA with iron...

I run a 7 heat range NGK on my TA with iron heads. I’d pick 6 heat range on your engine, but a 5 or the Autolite 85 would work.

I have had several pump gas engines that would barely even run...
Forum: Pontiac - Street 06-17-2026, 08:47 PM
Replies: 84
Views: 3,406
Posted By Jay S
They used pretty hot spark plugs, if I am not...

They used pretty hot spark plugs, if I am not mistaken that is a 4 heat range, which is a hot stock heat range plug, NGK the lower the number the hotter the plug. The hottest I would use is a 5.

...
Forum: Pontiac - Street 06-17-2026, 08:27 PM
Replies: 20
Views: 927
Posted By Jay S
That is all kinds of cool! Very nice! Thanks for...

That is all kinds of cool! Very nice! Thanks for sharing the result!
Forum: Pontiac - Street 06-16-2026, 08:45 PM
Replies: 13
Views: 429
Posted By Jay S
If the Lunati HR cam mentioned has a 112LSA with...

If the Lunati HR cam mentioned has a 112LSA with 4* of advance the maximum target compression for a fairly stock 389 should be at around 8.7:1 for 87 octane. With the cam mentioned, stock induction...
Forum: Pontiac - Street 06-03-2026, 06:22 PM
Replies: 17
Views: 676
Posted By Jay S
Basic diagram using tees and a check valve. It is...

Basic diagram using tees and a check valve. It is not complicated.
Forum: Pontiac - Street 06-03-2026, 05:07 PM
Replies: 17
Views: 676
Posted By Jay S
It would be overkill to use a fuel pump that has...

It would be overkill to use a fuel pump that has AN10 fittings. You’d be better off with AN10 tees and a AN10 check valve that bypasses the electric pump for full flow through the 1/2” line, then ...
Forum: Pontiac - Street 06-01-2026, 11:20 PM
Replies: 17
Views: 676
Posted By Jay S
Would there room to install the tee down on the...

Would there room to install the tee down on the outlet of the Robbmc pump?

On my cars I don’t run a seperate line. I put the electric pump in series using the same line and use a vane style...
Forum: Pontiac - Street 05-31-2026, 08:33 AM
Replies: 50
Views: 2,434
Posted By Jay S
Anyone seen a PUMP GAS naturally aspirated engine...

Anyone seen a PUMP GAS naturally aspirated engine that was dynoed with EXHAUST manifold's that did better on peak power than this Pontiac engine MRE did in the video? Round port? Even from a...
Forum: Pontiac - Street 05-27-2026, 06:36 PM
Replies: 11
Views: 417
Posted By Jay S
I think welding it shut would be the best. The...

I think welding it shut would be the best. The screw on style cap would probably hold though. With it tightened after some use they are usually so tight they are difficult to unscrew.

A large...
Forum: Pontiac - Street 05-25-2026, 12:18 PM
Replies: 50
Views: 2,434
Posted By Jay S
Where that already has the RA manifolds with the...

Where that already has the RA manifolds with the down pipe and full exhaust, I can’t blame you for keeping with them. As long as it has the correct mix of parts, like a dual plane intake and the...
Forum: Pontiac - Street 05-25-2026, 10:33 AM
Replies: 50
Views: 2,434
Posted By Jay S
I was impressed when Morris took the time to cut...

I was impressed when Morris took the time to cut apart the spark plug to read it and added the spacer for the next step to lean it up a little. Seems like he makes pretty logical steps in the video...
Forum: Pontiac - Street 05-25-2026, 10:02 AM
Replies: 50
Views: 2,434
Posted By Jay S
I agree, there was 20 HP improvement left on that...

I agree, there was 20 HP improvement left on that engine with header tuning, on a really hot day I would expect the RA manifolds to loose even more power versus Morris’s climate controlled shop, and...
Forum: Pontiac - Street 05-22-2026, 05:28 PM
Replies: 12
Views: 616
Posted By Jay S
From what I recall the factory installed spring...

From what I recall the factory installed spring height on RA4 is just over 1.8”. It takes some adjustments on the spring height to run a 1.7” spring. The 1.7” springs like the 68405 and the 995...
Forum: Pontiac - Street 05-22-2026, 09:18 AM
Replies: 24
Views: 1,006
Posted By Jay S
Nice! Is that going in the TA your kid is...

Nice! Is that going in the TA your kid is driving?
Forum: Pontiac - Street 05-22-2026, 09:10 AM
Replies: 12
Views: 616
Posted By Jay S
The drop in valves spring for a RA4 cam with RA4...

The drop in valves spring for a RA4 cam with RA4 heads is a Compcams 987.

With hardened seats I think it depends on how much wear the heads have and how much the car will get driven. The...
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