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Search took 0.06 seconds. Search: Posts Made By: Jay S
Forum: Pontiac - Street Today, 08:26 AM
Replies: 13
Views: 568
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 Today, 07:27 AM
Replies: 13
Views: 568
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 Yesterday, 03:43 PM
Replies: 13
Views: 568
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 Yesterday, 12:02 PM
Replies: 13
Views: 568
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 Yesterday, 09:00 AM
Replies: 13
Views: 568
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 Yesterday, 07:35 AM
Replies: 9
Views: 469
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: 758
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: 758
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: 758
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: 25
Views: 1,071
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: 32
Views: 1,567
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: 758
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: 758
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: 490
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: 25
Views: 1,071
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: 32
Views: 1,567
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: 32
Views: 1,567
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: 32
Views: 1,567
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...
Forum: Pontiac - Street 05-18-2024, 11:58 PM
Replies: 32
Views: 1,567
Posted By Jay S
The Crane version has a lot of seat timing like...

The Crane version has a lot of seat timing like the SPC-8 but also has Asymmetric closing and opening ramps. The other RA4 type cams are closer to symmetrical profiles. I am not sure if Crane did...
Forum: Pontiac - Street 05-18-2024, 04:40 PM
Replies: 32
Views: 1,567
Posted By Jay S
There are applications where the 60919 is better,...

There are applications where the 60919 is better, and in other places the RA4 CMC grind’s do better. Crane had a RA 4 grind is another version different than these others also that is ground...
Forum: Pontiac - Street 05-18-2024, 07:59 AM
Replies: 32
Views: 1,567
Posted By Jay S
I have found they are are not all that similar. ...

I have found they are are not all that similar. I don’t think a 60919 can run as much compression as a RA4, those 9.5 estimates are pretty close, and with aluminum heads 10:1 is about it. The...
Forum: Pontiac - Street 05-17-2024, 09:56 AM
Replies: 20
Views: 595
Posted By Jay S
I come up with 9.57 SCR if it has the stock...

I come up with 9.57 SCR if it has the stock pistons.
Forum: Pontiac - Street 05-16-2024, 11:56 AM
Replies: 20
Views: 595
Posted By Jay S
If it has the stock 78 pistons in it yet with the...

If it has the stock 78 pistons in it yet with the big bevel on the piston top the compression with the 72cc heads would only be in the low 9s. That would work fine with that small XE.
Forum: Pontiac - Street 05-16-2024, 11:13 AM
Replies: 82
Views: 2,882
Posted By Jay S
HAH! Pual’s comments now reminds me of the spoof...

HAH! Pual’s comments now reminds me of the spoof Slick50 advertisement video my Dad, my brother and I did. Dad was the commentator, he gave the used car salesman slick50 pitch, reading all the...
Forum: Pontiac - Street 05-15-2024, 07:36 AM
Replies: 23
Views: 1,155
Posted By Jay S
Pictures are hard to tell, but the piston looks...

Pictures are hard to tell, but the piston looks reusable in the photo. I would bring them along and have him look at the pistons, and check the rods for roundness. Usually the bigger problem when...
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