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Forum: Pontiac - Boost 04-05-2023, 11:29 AM
Replies: 5
Views: 920
Posted By 25stevem
I had mine blow out on me once until I layed down...

I had mine blow out on me once until I layed down a bead of blue form-A-gasket on both sides of the blower gasket and then let it set up over night.

Here's a warning though, if you do this then...
Forum: Pontiac - Street 04-03-2023, 05:55 AM
Replies: 18
Views: 1,747
Posted By 25stevem
One man's " running fine" is another mans needs a...

One man's " running fine" is another mans needs a rebuild!
Forum: Pontiac - Street 04-02-2023, 06:14 AM
Replies: 5
Views: 757
Posted By 25stevem
The first thing I would do would be to go down...

The first thing I would do would be to go down one heat range on your plugs and see if the coloring evens out enough that you notice it after 30 to 50 miles of driving.

What matters first though...
Forum: Pontiac - Street 04-01-2023, 03:13 PM
Replies: 18
Views: 1,747
Posted By 25stevem
Once you get this all bolted up and ready to fire...

Once you get this all bolted up and ready to fire over I would first borrow from a friend or rent from a tool rental location a rad pressure tester and just fill the cooling system with water and...
Forum: Pontiac - Street 04-01-2023, 10:52 AM
Replies: 18
Views: 1,747
Posted By 25stevem
Yup, jack up that side of the motor, but loosen...

Yup, jack up that side of the motor, but loosen up on the long thru bolt on the drivers side mount also., and also loosen up on the head pipe bolts in the exh manifold.
Forum: Pontiac - Street 03-31-2023, 06:35 PM
Replies: 11
Views: 644
Posted By 25stevem
What’s the two digit year date cast into the flat...

What’s the two digit year date cast into the flat area under the dizzy on the drivers side?

Also a 73 block would have 5 motor mount pads on each side, which is not the case for a 69 block.

The...
Forum: Pontiac - Street 03-30-2023, 06:14 AM
Replies: 15
Views: 1,692
Posted By 25stevem
Cost

Correct me please if I am wrong, but it looks like if you want a good set of HFT lifters these days it's gonna run you about $170 bucks
Forum: Pontiac - Street 03-30-2023, 06:07 AM
Replies: 23
Views: 2,635
Posted By 25stevem
Cliff thanks for this info ! It makes sense...

Cliff thanks for this info !
It makes sense that in terms of the 455 that advancing it to 107 would make it suck, because the 455s Bore to stroke ratio is not even square, no less over square until...
Forum: Pontiac - Street 03-30-2023, 06:01 AM
Replies: 12
Views: 1,155
Posted By 25stevem
A drop in elevation means you have dencer air and...

A drop in elevation means you have dencer air and that would require richer jetting assuming that the Carb was jetted right for that higher altitude it Cam from.
Forum: Pontiac - Race 03-29-2023, 11:47 AM
Replies: 27
Views: 3,181
Posted By 25stevem
I would be very concerned with trying to doing...

I would be very concerned with trying to doing any sort of home honing work to size the bushing when running roller lifters and there need to be perpendicular to the Cam.
Forum: Pontiac - Street 03-29-2023, 09:38 AM
Replies: 23
Views: 2,635
Posted By 25stevem
Since your running headers you need to add 3 to ...

Since your running headers you need to add 3 to 4% more flow to your bare heads exh numbers and enter into your program.
Forum: Pontiac - Street 03-29-2023, 06:30 AM
Replies: 23
Views: 2,635
Posted By 25stevem
What info are you inputting for cylinder head...

What info are you inputting for cylinder head flow numbers, and also will you be running headrers on this motor?
Forum: Pontiac - Street 03-28-2023, 06:07 AM
Replies: 10
Views: 1,003
Posted By 25stevem
The start of a Exh leak when running headers and...

The start of a Exh leak when running headers and a Exh system on the end if them is the headers getting yanked around during engine movement while supporting the Exh system.

A header should not...
Forum: Pontiac - Race 03-27-2023, 07:20 PM
Replies: 27
Views: 3,181
Posted By 25stevem
So the RAV block and the early 389 motors have...

So the RAV block and the early 389 motors have this rib in the crankcase on the passenger side, does the SD455 have that rib also?
Forum: Pontiac - Race 03-27-2023, 07:08 PM
Replies: 27
Views: 3,181
Posted By 25stevem
I might be more of the opinion that these...

I might be more of the opinion that these vertical rib reinforcements where done to help keep the block from splitting up through the mains like Arnie and Jess Tyree and others where experiencing....
Forum: Pontiac - Street 03-27-2023, 05:41 PM
Replies: 14
Views: 1,074
Posted By 25stevem
The only thing to be concerned with if you put 68...

The only thing to be concerned with if you put 68 and up heads on a 326 are these.

1) don’t run more then .420” lift to be on the safe side of PVC.

2) also in this same vein do not mill the...
Forum: Pontiac - Street 03-27-2023, 05:04 PM
Replies: 28
Views: 3,346
Posted By 25stevem
That’s a hell of a expensive tap these days if...

That’s a hell of a expensive tap these days if you plan on threading that hole for a pipe plug!
Forum: Pontiac - Street 03-27-2023, 12:59 PM
Replies: 28
Views: 2,536
Posted By 25stevem
Those lines indicate how the fluid in the test...

Those lines indicate how the fluid in the test pressure Manometer start to bounce up and down where you have the test pressure set.
It starts out in a given lift point range with just a shallow...
Forum: Pontiac - Street 03-27-2023, 11:42 AM
Replies: 6
Views: 611
Posted By 25stevem
What’s the block code you have ? Can you knock...

What’s the block code you have ?
Can you knock a intake valve out of it and post back on what you find?
Forum: Pontiac - Street 03-27-2023, 11:09 AM
Replies: 6
Views: 611
Posted By 25stevem
In looking at my notes deeper the 45 casting...

In looking at my notes deeper the 45 casting could be 45 degree intake or 30 degree seat, this being determined by the block code..

The YA coded 400s got the 30 degree seat.

The 1968 #15 head...
Forum: Pontiac - Street 03-27-2023, 10:36 AM
Replies: 8
Views: 946
Posted By 25stevem
If your picking gaskets to use for gasket...

If your picking gaskets to use for gasket matching then whatever mismatch you have on the exh port floor and for half way up the outside walls on the center ports and then for about half way up in...
Forum: Pontiac - Street 03-27-2023, 10:07 AM
Replies: 6
Views: 611
Posted By 25stevem
Jeff I have a set of those I use as a development...

Jeff I have a set of those I use as a development casting.
They are 1.96” with the normal 30 degree seat, and the exh is 1.66”.

The chambers are about 85 CCs.

Here are the stock intake and...
Forum: Pontiac - Race 03-27-2023, 07:23 AM
Replies: 27
Views: 3,181
Posted By 25stevem
Yup, I know, but still how much meat was taken...

Yup, I know, but still how much meat was taken out of the bores to get the sleeves in?
The factory engineers never dreamed that open spring pressures could be used that would need to top 600 psi.
I...
Forum: Pontiac - Race 03-27-2023, 05:50 AM
Replies: 27
Views: 3,181
Posted By 25stevem
I would be very concerned with the high levels of...

I would be very concerned with the high levels of side loading that roller lifters place on the the stock passenger side lifter bank in terms of there thickness no less with then now being thinner...
Forum: Pontiac - Street 03-26-2023, 05:58 PM
Replies: 28
Views: 2,536
Posted By 25stevem
Stan on test I have had done I have seen the...

Stan on test I have had done I have seen the dominant swirl pattern stop or even stop and then slightly reverse .
This was taking place right at the point when the air mass was forced to start...
Showing results 1 to 25 of 500

 
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