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Search took 0.04 seconds. Search: Posts Made By: Gary H
Forum: Pontiac - Street 09-19-2024, 04:46 PM
Replies: 53
Views: 2,544
Posted By NeighborsComplaint
Cam timing is retarded.

Cam timing is retarded.
Forum: Pontiac - Street 09-19-2024, 09:07 AM
Replies: 53
Views: 2,544
Posted By Elarson
I'll cast my vote for the incorrect cam phasing...

I'll cast my vote for the incorrect cam phasing and/or inaccurate ignition timing marks on the balancer.

Eric
Forum: Pontiac - Street 09-19-2024, 03:01 AM
Replies: 53
Views: 2,544
Posted By Squidward
I'm in with Gary on this. That combo should be a...

I'm in with Gary on this. That combo should be a fun rowdy little ride. I'd be checking TDC and checking timing chain/gears.
Forum: Pontiac - Street 09-09-2024, 11:21 AM
Replies: 13
Views: 565
Posted By tom s
BOP 1 pc.Tom

BOP 1 pc.Tom
Forum: Pontiac - Street 08-29-2024, 06:50 PM
Replies: 35
Views: 1,576
Posted By johnta1
What's the vacuum reading at idle? Is it...

What's the vacuum reading at idle?
Is it steady?


:confused:
Forum: Pontiac - Street 08-28-2024, 01:07 AM
Replies: 20
Views: 1,120
Posted By pont3
Update!! Here's what I found. I pulled the...

Update!!

Here's what I found. I pulled the distributor cap and rotor and low and behold the connector from the pickup coil in the distributor was bad. It somehow allowed the wire to the ignition...
Forum: Pontiac - Street 08-27-2024, 09:51 AM
Replies: 47
Views: 2,248
Posted By carbking
The easy solution is to place a piece of...

The easy solution is to place a piece of electrians tape over the temperature gauge display! ;)

Jon
Forum: 67-69 Firebird TECH 08-25-2024, 09:10 PM
Replies: 4,606
Views: 799,671
Posted By rdl
Virgin 48 heads generally spec at 72cc’s, while...

Virgin 48 heads generally spec at 72cc’s, while 62 heads come in at 75cc’s. (There’s a theory that 48’s used on 350 HO’s may have been machined as small as 66cc’s — but that’s another unresolved...
Forum: 67-69 Firebird TECH 08-25-2024, 05:10 PM
Replies: 4,606
Views: 799,671
Posted By north
The 62 heads have a larger combustion chamber so...

The 62 heads have a larger combustion chamber so produce about 9.8 to one actual compression ratio versus the 48’s delivering about 10.25.
Forum: Pontiac - Street 08-09-2024, 07:21 AM
Replies: 23
Views: 1,406
Posted By Formulajones
What many of us have said for years. Nothing...

What many of us have said for years. Nothing wrong with a good set of points.

Glad it worked out. Should provide you years and years of trouble free service.
Forum: Pontiac - Street 08-09-2024, 04:52 AM
Replies: 23
Views: 1,406
Posted By locomotivebreath
Ditched my Petronix

I had an igniter III conversion in my original 68 points distributor . Since I finished the car , I’ve always had quirky idle rpm , inconsistent timing and restarts . The engine ran fine other wise...
Forum: Pontiac - Race 07-25-2024, 05:59 PM
Replies: 25
Views: 1,852
Posted By jm455ho
On 475 Pontiac (435" bore x 4.00" stroke). Ported...

On 475 Pontiac (435" bore x 4.00" stroke). Ported HP heads. Solid roller (262°/274°/109° lsa)
Ported 4150 Northwind with HP1000 and 1.5" spacer - 783 hp @ 6900 / 657 lbft @ 5300
Ported 4500 Victor...
Forum: Pontiac - Race 07-25-2024, 05:44 PM
Replies: 25
Views: 1,852
Posted By jm455ho
From my tests on 433 Pontiac. Mildly ported #12...

From my tests on 433 Pontiac. Mildly ported #12 heads, solid flat tappet cam (250°/256°/112° lsa). HP750.
RPM - 525 hp @ 5800 / 549 lbft @ 4100
Torker 1 - 522 hp @ 5800 / 535 lbft @ 4400
Warrior -...
Forum: Pontiac - Race 07-21-2024, 01:05 PM
Replies: 18
Views: 875
Posted By Elarson
Sirrotica is exactly correct. Higher water speed...

Sirrotica is exactly correct. Higher water speed gives higher heat transfer and higher pressure avoids boiling pockets.

Eric
Forum: Pontiac - Race 07-21-2024, 12:47 PM
Replies: 18
Views: 875
Posted By Sirrotica
To answer your question about water going too...

To answer your question about water going too fast through a radiator, no you cannot go faster than coolant can reject heat. Coolant rejects water at the same rate of the speed of electricity, so it...
Forum: Pontiac - Street 07-15-2024, 11:36 AM
Replies: 42
Views: 2,192
Posted By JB Eng Wis
I would keep your XFI cam.... and Bump your...

I would keep your XFI cam.... and Bump your Compression to around 11 to 1 ,,,, IMO
Forum: Pontiac - Street 07-15-2024, 10:13 AM
Replies: 42
Views: 2,192
Posted By tom s
Run the 242-248.Tom

Run the 242-248.Tom
Forum: Pontiac - Street 07-13-2024, 11:31 AM
Replies: 22
Views: 1,497
Posted By PAUL K
Ram Air IV build

We recently completed a pretty cool build for a Lucerne Blue 70 TA. It's a correct numbers build which will look, sound and idle like a stock RAIV but make around 550 hp.

Factory four bolt WW...
Forum: Pontiac - Race 07-12-2024, 10:47 PM
Replies: 27
Views: 2,442
Posted By J.C.you
Since George was ran off, it went down hill. He...

Since George was ran off, it went down hill. He always kept the pot stirring
Forum: 67-69 Firebird TECH 07-09-2024, 02:28 PM
Replies: 11
Views: 556
Posted By 65madgoat
You could put 500 lbs in the trunk and it won't...

You could put 500 lbs in the trunk and it won't lower it to where it needs to be :pound:
Forum: Pontiac - Street 06-10-2024, 07:38 PM
Replies: 10
Views: 1,274
Posted By Sirrotica
One thing I've found over the years that lead to...

One thing I've found over the years that lead to a dog Pontiac when all the obvious things check out.

Cam timing off, I know you swear you have it right, but it's not that hard to mess it up with...
Forum: Pontiac - Street 06-02-2024, 09:16 AM
Replies: 30
Views: 2,548
Posted By Sun Tuned
The part where you removed the springs and set...

The part where you removed the springs and set timing at 2750 is where this got messed up.

You cannot do this with an HEI, unless it’s been modified for a positive stop,. It won’t work right doing...
Forum: 70-72 GTO Tempest & LeMans TECH 05-31-2024, 02:23 PM
Replies: 370
Views: 62,161
Posted By Steve Barcak
Hello out there, end of May 2024. Am not on here...

Hello out there, end of May 2024. Am not on here often enough but, just spent some time going through the entire thread and wanted to add some-

1. on page 12 post #234 That is the GTO I...
Forum: Pontiac - Race 05-26-2024, 10:07 AM
Replies: 2
Views: 854
Posted By KEN CROCIE
So that you can' t screw up and block the oil...

So that you can' t screw up and block the oil passage.
Forum: Pontiac - Race 04-20-2024, 11:12 PM
Replies: 16
Views: 1,912
Posted By OG68
Truck System Technologies. Added them to my...

Truck System Technologies. Added them to my Airstream over three years ago. Accurate and easy to install.
...
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