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Search took 0.06 seconds. Search: Posts Made By: Jay S
Forum: Pontiac - Race Yesterday, 10:14 PM
Replies: 14
Views: 268
Posted By Jay S
Changing to a beehive from a dual spring the...

Changing to a beehive from a dual spring the minimum spring pressure drop most do is 10%, the max is about 25%. The lifter weight has nothing to do with that part of it, it all comes from less mass...
Forum: Pontiac - Street Yesterday, 01:38 PM
Replies: 22
Views: 597
Posted By Jay S
I don’t think there was a reproduction of the 067...

I don’t think there was a reproduction of the 067 in 1992. If you looked up a replacement cam in a book at that time I think it sub’d over too the 066 as a replacement. If it has an 068, which is...
Forum: Pontiac - Street Yesterday, 07:50 AM
Replies: 22
Views: 597
Posted By Jay S
The 66 GTO’s 4bbl std engine would have been a...

The 66 GTO’s 4bbl std engine would have been a 067. The tri power cam was the 068 and a few later tri power’s had the 744. It is pretty common for the 4bbl engines to receive a 066 after a...
Forum: Pontiac - Street 06-03-2024, 10:38 AM
Replies: 22
Views: 597
Posted By Jay S
Which stock replacement cam does it have? A cam...

Which stock replacement cam does it have? A cam change might be a better solution. Depending on how the rest of the drive train is set up it may need to be a custom grind. We have done some pretty...
Forum: Pontiac - Street 06-02-2024, 11:07 PM
Replies: 40
Views: 1,885
Posted By Jay S
That’s a bummer. I don’t know but that...

That’s a bummer.

I don’t know but that high pitched growl sounds more like it started to locked up a needle bearing on one or more of the roller lifters.

Having a crank bearing fail and...
Forum: Pontiac - Street 06-01-2024, 03:20 PM
Replies: 34
Views: 1,936
Posted By Jay S
Good plan.

Good plan.
Forum: Pontiac - Street 06-01-2024, 11:11 AM
Replies: 36
Views: 1,340
Posted By Jay S
If the car is tuned up enough to make short...

If the car is tuned up enough to make short trips like what was described I doubt the tune is that far off. With a pretty big CSA port and a 300+ cfm head running errands to Walmart, I think you...
Forum: Pontiac - Street 05-29-2024, 08:26 AM
Replies: 36
Views: 1,340
Posted By Jay S
More time on those plugs would tell. If one plug...

More time on those plugs would tell. If one plug looked like that maybe it has a cylinder pumping oil. But I would expect the carbon deposits to be much thicker if that was from burning oil. It...
Forum: Pontiac - Street 05-29-2024, 07:27 AM
Replies: 36
Views: 1,340
Posted By Jay S
FWIW…We run pretty cold plugs on pump gas engines...

FWIW…We run pretty cold plugs on pump gas engines that with a lot of street driving they can look a lot like that first picture. Usually not wet looking though. I don’t know if your interested in...
Forum: Pontiac - Street 05-28-2024, 03:43 PM
Replies: 36
Views: 1,340
Posted By Jay S
You can start by checking the vacuum advance and...

You can start by checking the vacuum advance and see how much timing it is adding and make sure it is working. May not be an issue at all. If it is adjustable and set for adding less than 15* it...
Forum: Pontiac - Street 05-28-2024, 12:02 PM
Replies: 36
Views: 1,340
Posted By Jay S
Lots of idling, and very limited or inoperable...

Lots of idling, and very limited or inoperable vacuum advance makes the plugs run cold and will look black and wet like that.
Forum: Pontiac - Street 05-28-2024, 09:00 AM
Replies: 36
Views: 1,340
Posted By Jay S
A 12 should not be to cold of a spark plug. The...

A 12 should not be to cold of a spark plug. The photo shows it to be cold though, and has the appearance it has idled around a lot and is burning very rich. Possibly you are not running a vacuum...
Forum: Pontiac - Street 05-28-2024, 07:35 AM
Replies: 17
Views: 820
Posted By Jay S
That one has the same gears and can use the same...

That one has the same gears and can use the same carrier as a corporate 8.5, tons of parts for it, it is not a 12 bolt type O. It is a lot stronger than a type O. The type O has a larger 8.5? ring...
Forum: Pontiac - Street 05-25-2024, 12:40 AM
Replies: 22
Views: 839
Posted By Jay S
That is a hilarious. A 557 block and...

That is a hilarious.

A 557 block and stock d ports is more like picking up a chick at a church potluck. It could still go wrong, but you have decent odds, some of us drive 50 year old 10...
Forum: Pontiac - Street 05-24-2024, 04:42 PM
Replies: 22
Views: 839
Posted By Jay S
Kind of makes you wonder what kind of sales pitch...

Kind of makes you wonder what kind of sales pitch Butler’s do when selling 557.
Forum: Pontiac - Street 05-24-2024, 03:24 PM
Replies: 22
Views: 839
Posted By Jay S
The 557’s I have seen that broke had the crack...

The 557’s I have seen that broke had the crack start at the dowels, then work it’s way over to whatever area was next weakest. Some blocks have small cracks at the dowels that just barely started,...
Forum: Pontiac - Street 05-24-2024, 09:48 AM
Replies: 28
Views: 1,405
Posted By Jay S
The machinist will know that the block will need...

The machinist will know that the block will need line honed when you tell them you want to run ARP studs. The extra clamping force of the main studs distorts the caps quite a bit.

A good...
Forum: Pontiac - Street 05-24-2024, 09:24 AM
Replies: 34
Views: 1,936
Posted By Jay S
If the 995 springs are too spec and set up...

If the 995 springs are too spec and set up correctly they will work fine. If those heads cam from SD performance I think he would have checked their pressures.

The Vpro or Vmax lifters will...
Forum: Pontiac - Street 05-23-2024, 07:28 PM
Replies: 22
Views: 839
Posted By Jay S
Jeff I think the better question is how many old...

Jeff I think the better question is how many old 400 blocks does Butler’s have left since they are selling 557s instead. Lol

All the 1977 400s where 557s. In 78 I think the XA code was a 301
Forum: Pontiac - Street 05-23-2024, 06:27 PM
Replies: 22
Views: 839
Posted By Jay S
FWIW…Bulter sells kits that include 557 blocks...

FWIW…Bulter sells kits that include 557 blocks with 4” cranks and rates them for 500HP. I think about the only mod they do is line honing for ARP main studs. ...
Forum: Pontiac - Street 05-23-2024, 09:49 AM
Replies: 11
Views: 529
Posted By Jay S
It is hard to say what all has been done inside...

It is hard to say what all has been done inside of the engine after 50+ years. Could have several thing hurting it.

These screen shots are pretty close to the actual compression on a 69 400, with...
Forum: Pontiac - Street 05-22-2024, 09:46 PM
Replies: 28
Views: 1,405
Posted By Jay S
What kills 557 blocks is the dowel pins are...

What kills 557 blocks is the dowel pins are drilled clear thru, the other older blocks the holes are blind. If the dowel holes on the caps are not quite lined up, or it has enough power the make the...
Forum: Pontiac - Street 05-22-2024, 09:29 AM
Replies: 34
Views: 1,936
Posted By Jay S
FWIW..The 428 will like the 60919s narrower 112...

FWIW..The 428 will like the 60919s narrower 112 LSA and the 670 heads with the 45* seats will like the 60919s shorter seat timing. Of the combination of parts you have that will give the 428 the most...
Forum: Pontiac - Street 05-19-2024, 08:22 AM
Replies: 34
Views: 1,936
Posted By Jay S
I think all you would have to do to see which...

I think all you would have to do to see which 60919 you have is to set it next to the SPC-8 and compare the lobe widths. If it has narrower lobes if is the later 60919. If it has the same width...
Forum: Pontiac - Street 05-19-2024, 08:08 AM
Replies: 34
Views: 1,936
Posted By Jay S
Depends….The 45* seats on the intakes move more...

Depends….The 45* seats on the intakes move more flow to where the piston speed is faster. The engine scavenges less, if your not careful it will make less power. It is similar to widening the LSA...
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