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Posts Made By:
steve25
Forum:
Pontiac - Street
Yesterday, 06:00 AM
Replies:
13
Changing valve seals 1970 350
Views:
243
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
Recipe for a reliable 400 driver
Views:
1,352
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:
58
e head questions alot of questions
Views:
2,437
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
Changing Roller Rocker Arms: Setting Pre-Load on Pumped Up Hydraulic Roller Lifters
Views:
531
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
Vent on filler neck
Views:
331
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
Changing Roller Rocker Arms: Setting Pre-Load on Pumped Up Hydraulic Roller Lifters
Views:
531
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
What’s this 421 worth?
Views:
733
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
Fuel pump?
Views:
858
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
Manifold bolt torque specs in aluminum head
Views:
144
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
Best alternative to the cast 8vr?
Views:
973
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
Rhoads lifters - still available?
Views:
2,341
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
Removing trans from 69GP
Views:
528
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
1000+ cfm from a Qjet
Views:
3,930
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
1000+ cfm from a Qjet
Views:
3,930
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
1000+ cfm from a Qjet
Views:
3,930
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...
Forum:
Pontiac - Street
04-17-2024, 05:08 PM
Replies:
23
Oil capacity
Views:
1,471
Posted By
steve25
Bop states that it’s a 5qt pan and with a filter...
Bop states that it’s a 5qt pan and with a filter change if you do not prime the filter then add 6 qts.
So I need to ask if the upper dip stick tube was driven into the block all the way, if not it...
Forum:
Pontiac - Race
04-17-2024, 07:48 AM
Replies:
14
Edelbrock Pro Port 440cfm heads, KRE MR1A block, intake build
Views:
982
Posted By
steve25
What circle track class allows 540 cid?
What circle track class allows 540 cid?
Forum:
Pontiac - Street
04-17-2024, 05:48 AM
Replies:
5
Screw in studs for a Crower 60916?
Views:
536
Posted By
steve25
Well then run your #15s and if you can get it...
Well then run your #15s and if you can get it done local enough and afford it get the studs pinned.
If you or a buddy have a decent drill press you can do it yourself.
Forum:
Pontiac - Street
04-16-2024, 04:46 PM
Replies:
1
A body accelerator pedals
Views:
243
Posted By
steve25
I don’t know the details of that part of the set...
I don’t know the details of that part of the set up, I do know that in terms of the pedal itself auto trans cars had the chrome trim around the pedal, mt cars did not,
Forum:
Pontiac - Street
04-10-2024, 06:17 PM
Replies:
35
Holley Street Dominator Manifold?
Views:
1,844
Posted By
steve25
Oh got it, thanks!
Oh got it, thanks!
Forum:
Pontiac - Street
04-08-2024, 08:23 AM
Replies:
17
Cylinder Offset Changes Everything
Views:
1,171
Posted By
steve25
X72GPX it’s due to first off the longer strokes...
X72GPX it’s due to first off the longer strokes that Pontiacs have then other brands on there street production motors.
For example a 455 Buick has a 3.90” stroke as compared to the Pontiac 455...
Forum:
Pontiac - Street
04-07-2024, 03:35 PM
Replies:
25
326 head questions
Views:
971
Posted By
steve25
Good, that’s the way to work this out and you...
Good, that’s the way to work this out and you then have the needed rockers and push rods I hope, because used rockers should stay mated to there push Rod’s.
This is why Pontiac use to only supply...
Forum:
Pontiac - Street
04-06-2024, 08:04 AM
Replies:
22
Best Radiator for a Street/Strip 75 Formula 400 Firebird.
Views:
1,149
Posted By
steve25
Other details for good cooling that often get...
Other details for good cooling that often get overlooked are hose related .
No flexible ribbed type hoses should be used since they create turbulence and that turbulence causes a restriction.
...
Forum:
Pontiac - Street
04-06-2024, 07:07 AM
Replies:
67
Diagnosing Loss in Performance and WOT Backfires
Views:
2,984
Posted By
steve25
To rule out a ignition issue get the motor up to...
To rule out a ignition issue get the motor up to act up, then out of gear bring it up to about 5400 rpm for 2 to 3 seconds.
If the motor runs clean and does not break up I would say your problem is...
Forum:
Pontiac - Race
04-02-2024, 06:03 PM
Replies:
9
Timing cover machining advice wanted!
Views:
821
Posted By
steve25
I have used successfully some darn poor looking...
I have used successfully some darn poor looking timing covers just by using a good bead of form-a- gasket on both sides of the gasket.
In fact after doing this it’s hard a hell to get the cover...
Showing results 1 to 25 of 500
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