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Forum: Pontiac - Street 01-22-2025, 06:22 AM
Replies: 14
Views: 422
Posted By Kenth
Intake manifold vacuum for the VA equals stronger...

Intake manifold vacuum for the VA equals stronger vacuum in intake equals richer idle mixture pushed thru the carb by atmospheric pressure.

Off-idle hesitation is a true indicator of a too lean...
Forum: Pontiac - Street 01-21-2025, 09:35 PM
Replies: 14
Views: 422
Posted By gto4ben
I also had an off-idle stumble on my '72 455...

I also had an off-idle stumble on my '72 455 engine with the 7041262 Q-Jet and automatic transmission that I installed in my '67 LeMans. Distributor was the stock that came with the engine and...
Forum: Pontiac - Street 01-21-2025, 06:03 PM
Replies: 14
Views: 422
Posted By b-man
You have a professionally rebuilt carburetor. ...

You have a professionally rebuilt carburetor.

Match it with a professionally rebuilt / recurved distributor that will include the correct springs and vacuum advance canister.

Worth every penny.
Forum: Pontiac - Street 01-17-2025, 12:42 AM
Replies: 79
Views: 2,142
Posted By mgarblik
A little trivia concerning Dex Cool. Developed...

A little trivia concerning Dex Cool. Developed by Havoline for GM. The 10 year, 100,000 mile change interval was a cool bonus for this coolant but was not the only reason for it's development. At...
Forum: Pontiac - Street 01-17-2025, 12:32 AM
Replies: 79
Views: 2,142
Posted By mgarblik
There are allot of different opinions and...

There are allot of different opinions and recommendations, so I can't say with any degree of certainty. GM training I attended in the 1980's, said absolutely all coolant must be flushed out when...
Forum: Pontiac - Street 01-16-2025, 07:50 PM
Replies: 79
Views: 2,142
Posted By Jay S
I don’t think mixing in distilled water would...

I don’t think mixing in distilled water would change the LSI much with an automotive coolant. Wouldn’t the distilled water be lowering the PH and the PHs by about the same amount?

That second...
Forum: Pontiac - Street 01-16-2025, 06:43 PM
Replies: 79
Views: 2,142
Posted By Shiny
Motivation to go educate myself. I am unfamiliar...

Motivation to go educate myself. I am unfamiliar with the term LSI.
Forum: Pontiac - Street 01-15-2025, 09:17 PM
Replies: 443
Views: 99,203
Posted By Stan65
All, I just finished another run of dog...

All,

I just finished another run of dog bones (retainers).

This version has a little more clearance designed in that will hopefully eliminate all grinding on the bones to clear the different...
Forum: Pontiac - Street 12-25-2024, 04:17 PM
Replies: 7
Views: 190
Posted By 77 TRASHCAN
Felize Navidad!!!

Felize Navidad!!!
Forum: Pontiac - Street 12-25-2024, 01:45 PM
Replies: 59
Views: 2,902
Posted By 67Fbird
not good at doing pictures...argh

not good at doing pictures...argh
Forum: Pontiac - Street 12-25-2024, 01:30 PM
Replies: 7
Views: 190
Posted By 67Fbird
Merry Chistmas and a Happy new year to all. Be...

Merry Chistmas and a Happy new year to all. Be safe out there as the idiots tend to multiply rapidly and show up everywhere.
Forum: Pontiac - Street 12-25-2024, 09:53 AM
Replies: 7
Views: 190
Posted By grivera
Merry Christmas, all!

Merry Christmas, all!
Forum: Pontiac - Street 12-24-2024, 10:51 PM
Replies: 7
Views: 190
Posted By OG68
Merry Christmas to the Pontiac Family!

Merry Christmas to the Pontiac Family!
Forum: Pontiac - Street 12-24-2024, 10:42 PM
Replies: 7
Views: 190
Posted By 64speed
Merry Christmas everyone!!!!

Merry Christmas everyone!!!!
Forum: Pontiac - Street 12-24-2024, 10:36 PM
Replies: 7
Views: 190
Posted By ponchjoe
Ditto and here’s to health, happiness, and...

Ditto and here’s to health, happiness, and Pontiac power not only in 2025 but for many years to come!
Forum: Pontiac - Street 12-24-2024, 10:11 PM
Replies: 7
Views: 190
Posted By CraigG.
Merry Christmas and happy holidays!

Happy Holidays and Blessings to All of the Pontiac Community

Hey Everybody, I just wanted to thank everyone for all the help and recognize that we ALL contribute to building the Pontiac Community....
Forum: Pontiac - Street 12-24-2024, 09:50 AM
Replies: 59
Views: 2,902
Posted By Kenth
CWC Textron makes the cam cores. ...

CWC Textron makes the cam cores.

https://www.kautex.com/en/mobility/cwc-textron-castings

CMC (Camshaft Machine Company) grinds camshafts.

Two different companies.

BTW CMC is one of at...
Forum: Pontiac - Street 12-23-2024, 01:59 AM
Replies: 59
Views: 2,902
Posted By Jay S
The Melling SPC-8 is suppose to be an OE...

The Melling SPC-8 is suppose to be an OE replacement. Probably gets my vote if you want a RA 4 cam. Side by side comparison the SPC-8 I have had used a different cam core with a wider lobe. It’d...
Forum: Pontiac - Street 12-21-2024, 12:01 PM
Replies: 62
Views: 2,606
Posted By chiphead
https://forums.maxperformanceinc.com/forums/showth...

https://forums.maxperformanceinc.com/forums/showthread.php?t=810878&highlight=433&page=5

This is my 433 build. This was my first stroker motor build and I learned a lot. If you want to build a...
Forum: Pontiac - Street 12-21-2024, 10:56 AM
Replies: 276
Views: 49,495
Posted By mgarblik
Yes, you did send me that information. It was...

Yes, you did send me that information. It was really interesting and cool to see how the SD-455 engine responded to the changes they made during development.

Agree, headers and a nice full...
Forum: Pontiac - Street 12-20-2024, 10:35 PM
Replies: 21
Views: 1,319
Posted By CROCIE JR
Line hone it to the tight side of spec. 2 things...

Line hone it to the tight side of spec. 2 things happen for me. Going from the large limit of housing bore to the tight side of spec shrinks your vertical oil clearance about a half thou. Number 2,...
Forum: 77-81 Firebird & Trans Am TECH 12-19-2024, 09:13 AM
Replies: 15
Views: 693
Posted By Maxthe222
Arrow The Macho T/A Registry

Hey PY'ers,

I've been hard at work with the Macho T/A Owner's Group to overhaul the registry for the DKM 1977-1980 Macho T/A's. Over the last few weeks, we've been able to find dozens of Machos...
Forum: 77-81 Firebird & Trans Am TECH 12-11-2024, 04:12 PM
Replies: 4
Views: 321
Posted By Scarebird
Don't. They are staggered to mitigate axle...

Don't.

They are staggered to mitigate axle hop. I would question the logic of whoever "advised" you to do this.

GM copied Ford here in staggering for a reason. Note 67 F's had all sorts of...
Forum: Pontiac - Street 12-06-2024, 12:56 PM
Replies: 175
Views: 56,515
Posted By tom s
I bought the SM heads complete.He did not have to...

I bought the SM heads complete.He did not have to replace anything for the selection of cam I used.Just touch up the the valve job.My Eheads will be here today and they will go to the shop on...
Forum: Pontiac - Street 05-14-2024, 10:19 PM
Replies: 32
Views: 1,937
Posted By tom s
3 type,the ones that don’t care!Tom

3 type,the ones that don’t care!Tom
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