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Search took 0.14 seconds. Search: Posts Made By: steve25
Forum: Pontiac - Street 05-28-2024, 05:45 PM
Replies: 14
Views: 663
Posted By steve25
With brand new plugs and not being at a track it...

With brand new plugs and not being at a track it will take at least 3 full throttle thru the gears runs to see anything worthwhile in terms of the plug being too hot or not.
And they need to be...
Forum: Pontiac - Street 05-28-2024, 05:22 PM
Replies: 13
Views: 634
Posted By steve25
If it’s as you say a stock-ish deal, then with...

If it’s as you say a stock-ish deal, then with stock springs and retainers that cams .470” lift might have been too much for the clearance set up on number 4.

Even with just 290 psi of open...
Forum: Pontiac - Street 05-25-2024, 03:51 PM
Replies: 5
Views: 289
Posted By steve25
What heads are you running? The size of the...

What heads are you running?
The size of the chamber effects the level of idle vacuum you pull also.

I would also hope that with a cam of those specs that your running at least 9.5 to 1.?
Forum: Pontiac - Street 05-25-2024, 07:07 AM
Replies: 12
Views: 493
Posted By steve25
Go watch the Engine masters air filter shoot out...

Go watch the Engine masters air filter shoot out test and then decide if you still want to run a air lid with a filter in it a long with a normal side flow filter.
Forum: Pontiac - Street 05-24-2024, 11:24 AM
Replies: 3
Views: 200
Posted By steve25
The hole in the air horn gasket for the pump...

The hole in the air horn gasket for the pump shaft could be getting oblonged, or the pump cup itself may not be sealing in the well and then instead of fuel only moving out into the primary's it...
Forum: Pontiac - Street 05-23-2024, 08:09 PM
Replies: 22
Views: 771
Posted By steve25
How many here had a 78 TA with the W72 package,...

How many here had a 78 TA with the W72 package, let me jump the gun here.

I had two, one with 40k miles on it and another with 80k on it when I got it .
Both auto trans models.
This 80k one when...
Forum: Pontiac - Street 05-23-2024, 03:55 PM
Replies: 22
Views: 771
Posted By steve25
I would have no concern with longevity running...

I would have no concern with longevity running such a block provided these guidelines are met.

Lighter aftermarket rods and pistons are used.

The stroke stays at 3.750”

A good balance job...
Forum: Pontiac - Street 05-14-2024, 06:08 PM
Replies: 8
Views: 346
Posted By steve25
If you narrow it down to the front then jack the...

If you narrow it down to the front then jack the front up on each side and have someone spin the tire while you apply the brakes lightly.

If you do not feel anything then you know the issue is due...
Forum: Pontiac - Street 05-14-2024, 05:43 PM
Replies: 15
Views: 667
Posted By steve25
How do you grind a Crankshaft this big?

I’am stunned!
Forum: Pontiac - Street 05-14-2024, 12:51 PM
Replies: 18
Views: 582
Posted By steve25
Johnny on my last motor I did springs on in car I...

Johnny on my last motor I did springs on in car I had to use rope.
The motor had thin rings and a non rope rear seal, so with air in one cylinder it would just spin over very slowly.
When I lowered...
Forum: Pontiac - Street 05-13-2024, 06:00 AM
Replies: 18
Views: 582
Posted By steve25
The stock valve seals on any regular production...

The stock valve seals on any regular production Pontiac V8 are just the O rings like you used on your assembly of the 6X heads.

To change them in the car you need bring the piston up to TDC, stuff...
Forum: Pontiac - Street 05-08-2024, 07:58 PM
Replies: 32
Views: 1,730
Posted By steve25
While the 71 96 casting heads flow good enough to...

While the 71 96 casting heads flow good enough to make 350 Hp even without headers they will not get your compression with a 400 up into the 9 to 1 range without milling them .060” on the deck and...
Forum: Pontiac - Street 05-08-2024, 06:12 PM
Replies: 64
Views: 3,132
Posted By steve25
8.750” to 9.500” should do it easy.

8.750” to 9.500” should do it easy.
Forum: Pontiac - Street 05-06-2024, 06:02 AM
Replies: 10
Views: 596
Posted By steve25
You shoukd also consider the fact that aluminum...

You shoukd also consider the fact that aluminum heads when fully up to temp will grow taller by .006" to .008" thus releaving some of your preload adjustment.

If you assume that you have perfect...
Forum: Pontiac - Street 05-05-2024, 03:11 PM
Replies: 7
Views: 360
Posted By steve25
Use a vented cap since it will never get get...

Use a vented cap since it will never get get clogged off with age like the hose can.
Forum: Pontiac - Street 05-05-2024, 03:09 PM
Replies: 10
Views: 596
Posted By steve25
Is your valley pan and Intake on the motor. ...

Is your valley pan and Intake on the motor.

Has the motor been run before, or are the lifters empty?
Forum: Pontiac - Street 05-03-2024, 02:30 PM
Replies: 19
Views: 794
Posted By steve25
I am trying to find my notes from 25 years ago ...

I am trying to find my notes from 25 years ago in regards to the valve to piston clearance deal, but here’s what I recall off of the top of my head.
Using 428 pistons in a 421 build with its...
Forum: Pontiac - Street 05-03-2024, 11:30 AM
Replies: 20
Views: 979
Posted By steve25
With only 3 psi to feed even just one Carb no...

With only 3 psi to feed even just one Carb no less 3 would not run the motor to full throttle and expect nothing less then the motor falling on its face within 4 seconds.or by the time you get...
Forum: Pontiac - Street 05-03-2024, 09:31 AM
Replies: 1
Views: 162
Posted By steve25
25ft lbs will get it done. Just first confirm...

25ft lbs will get it done.
Just first confirm that all the bolts thread in easy by hand and will not bottom out without having the manifold already clamped down.
Forum: Pontiac - Street 05-01-2024, 07:42 PM
Replies: 24
Views: 1,079
Posted By steve25
With a 4.120” to a 4.150” bore and a 3.750”...

With a 4.120” to a 4.150” bore and a 3.750” stroke and a 72 Cc head every 4 CCs will change the compression close enough to a 1/4 point in regards to a street motor .
Forum: Pontiac - Street 04-24-2024, 11:46 AM
Replies: 37
Views: 2,508
Posted By steve25
I am sure that Rhoads does not make a living off...

I am sure that Rhoads does not make a living off of just Pontiac lifters!

People who do not use them and have over Cam’ed motors are some of the other brands that we blow into the weeds with our...
Forum: Pontiac - Street 04-21-2024, 07:29 AM
Replies: 6
Views: 553
Posted By steve25
Post 3 has the solution. To drop it out let...

Post 3 has the solution.

To drop it out let both headers dangle on there bolts as far as possible and loosen up the collectors bolts.

If you put anti-seize on at lease one side of your header...
Forum: Pontiac - Street 04-19-2024, 08:25 AM
Replies: 55
Views: 4,118
Posted By steve25
Two big fuel bowls and two needles and seats can...

Two big fuel bowls and two needles and seats can at times solve the problem of not having a pump back at the tank purely due to the fuel volume on hand.

The root cause many times is the G force...
Forum: Pontiac - Street 04-18-2024, 08:40 AM
Replies: 55
Views: 4,118
Posted By steve25
GM did not make the Q jet Rochester mainly did...

GM did not make the Q jet Rochester mainly did and then Carter for a while.

The 4 bbl test pressure has always been 1.5 hg which converts to 20.4 inches of water, not 24 inches of water.

When ...
Forum: Pontiac - Street 04-18-2024, 06:31 AM
Replies: 55
Views: 4,118
Posted By steve25
With any motor the bottom line is that at full...

With any motor the bottom line is that at full throttle , max rpm and under load a vacuum gauge will tell you if you need a higher flowing carb(s) or not.

Also too large of a carb can undue what...
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