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Search took 0.30 seconds. Search: Posts Made By: Tim Corcoran
Forum: Pontiac - Street 07-17-2026, 05:09 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
Since the vibration is still present during...

Since the vibration is still present during deceleration with my food off the gas I doubt it is carb or timing.
Forum: Pontiac - Street 07-17-2026, 05:07 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
Update: Removed the trans, clutch, pressure...

Update:

Removed the trans, clutch, pressure plate and flywheel. Installed two different OEM flex plates and the vibration is still present at 1800 RPM. I did notice that the clutch springs have...
Forum: Pontiac - Race 07-14-2026, 03:01 PM
Replies: 12
Views: 484
Posted By Tim Corcoran
13:1 compression, I don't remember the exact cam...

13:1 compression, I don't remember the exact cam specs but lift is around 650 and duration is around 265/268 @ .050 solid roller.
Forum: Performance Parts For Sale/Wanted 07-12-2026, 02:25 PM
Replies: 4
Views: 1,050
Posted By Tim Corcoran
Is this for a 4500?

Is this for a 4500?
Forum: Pontiac - Race 07-12-2026, 02:23 PM
Replies: 12
Views: 484
Posted By Tim Corcoran
Super Sucker

What spacer have you found to produce the most power on a 467 with 330 edelbrock heads on a Victor with a 1050 dominator on top?
Forum: Pontiac - Street 07-10-2026, 02:04 PM
Replies: 16
Views: 635
Posted By Tim Corcoran
Don't get rid of that Q-Jet, send it to one of...

Don't get rid of that Q-Jet, send it to one of the Q-Jet specialists here on the board and have them fix/rebuild it. The Q-Jet is a much better carb than you can buy today. Keep it, use it.
Forum: Pontiac - Street 05-18-2026, 10:53 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
Power Bond SFI

Power Bond SFI
Forum: Pontiac - Street 05-17-2026, 10:08 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
Could this vibration be caused by a bellhousing...

Could this vibration be caused by a bellhousing misalignment?
Forum: Pontiac - Street 05-11-2026, 08:16 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
I removed the belt and eliminated the...

I removed the belt and eliminated the accessories. Next step pull the trans, flywheel etc.
Forum: Pontiac - Street 05-11-2026, 10:03 AM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
850 Dbl pumper MSD RTR Distributor with vacuum...

850 Dbl pumper
MSD RTR Distributor with vacuum advance
Intake Performer RPM

The vibration is there in neutral, clutch in, clutch out, during acceleration, during steady, during deceleration. I...
Forum: Pontiac - Street 05-10-2026, 04:03 PM
Replies: 11
Views: 548
Posted By Tim Corcoran
I met Pete at Pontiac Drag Days at LA Drag Strip...

I met Pete at Pontiac Drag Days at LA Drag Strip in Palmdale CA in around 1986. He wasn't racing he was just hanging out with all the Pontiac racers. I was racing my 65 LeMans then street car running...
Forum: Pontiac - Street 05-10-2026, 03:30 PM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
It's very specific to 1,800 +/- 1000 RPM not...

It's very specific to 1,800 +/- 1000 RPM not present at 1,500 goes away before 2,000
Forum: Pontiac - Street 05-10-2026, 11:05 AM
Replies: 25
Views: 1,223
Posted By Tim Corcoran
1,800 RPM

I have a 67 GTO that I recently purchased. Its a great car and it very fast with a butler built stroked 455 with ported eheads hyd roller and Doug's headers. It has an M20 transmission with a...
Forum: Pontiac - Street 05-07-2026, 11:48 AM
Replies: 28
Views: 742
Posted By Tim Corcoran
Turns out the rear bowl had a leak and that's...

Turns out the rear bowl had a leak and that's what was draining the rear bowl and stinking up the garage. I changed the gasket and installed a 1/4" spacer. Now I give it a pump or two and fires right...
Forum: Pontiac - Street 05-02-2026, 01:59 PM
Replies: 28
Views: 742
Posted By Tim Corcoran
I plan to get a proper filter to put in front of...

I plan to get a proper filter to put in front of the carb and remove the plastic filter at the tank. I know mechanical pumps push much better than they pull. There are a few upgrades I plan to do...
Forum: Pontiac - Street 05-01-2026, 06:30 PM
Replies: 28
Views: 742
Posted By Tim Corcoran
.[/QUOTE] (And hopefully no one is running a...

.[/QUOTE] (And hopefully no one is running a plastic filter).


What about a plastic filter? There is a plastic filter back by the tank but what does that have to do with the subject.
Forum: Pontiac - Street 05-01-2026, 06:22 PM
Replies: 28
Views: 742
Posted By Tim Corcoran
I just bought this car and it still has the fuel...

I just bought this car and it still has the fuel it came with. In the future I will use ethanol free gas in this car and see it it helps. As a side note I use mid grade regular pump gas in my 67...
Forum: Pontiac - Street 05-01-2026, 10:49 AM
Replies: 28
Views: 742
Posted By Tim Corcoran
There is no evidence fuel is leaking onto the...

There is no evidence fuel is leaking onto the intake manifold.
Forum: Pontiac - Street 05-01-2026, 10:22 AM
Replies: 28
Views: 742
Posted By Tim Corcoran
Fuel Boiling

The car has D-Port Edelbrock heads and a mechanical fuel pump with no return line. The reason I think the fuel is boiling out of the carb is after a drive then parking the car in the garage, the...
Forum: Pontiac - Street 04-30-2026, 04:09 PM
Replies: 28
Views: 742
Posted By Tim Corcoran
Performer RPM with a spacer

I have a 473 with an 850DP on top of a Performer RPM. I think the fuel is boiling out after shut down I want to put a phenelic spacer either a 1/4 or 1/2 inch. My question is should I use an open...
Forum: Heating & Cooling TECH 04-24-2026, 04:01 PM
Replies: 6
Views: 864
Posted By Tim Corcoran
This may be too late but, the Pro6ten compressor...

This may be too late but, the Pro6ten compressor is a much better compressor and is a direct bot in going from the factory A6 compressor. Plus it makes it a simple job. Another suggestion is to...
Forum: Heating & Cooling TECH 04-24-2026, 03:42 PM
Replies: 2
Views: 1,173
Posted By Tim Corcoran
67 GTO and LeMans AC system

I have a 67 LeMans that is a factory AC car. This system had not been working for many years. I installed a new parallel flow condenser and the Pro6ten compressor. The pro6ten compressor is a direct...
Forum: Pontiac - Street 04-10-2026, 11:12 PM
Replies: 36
Views: 1,557
Posted By Tim Corcoran
Hmmmmm Pontiac used cast pistons from the factory...

Hmmmmm Pontiac used cast pistons from the factory and I don't recall anyone having problems with cast pistons on a street car. They are plenty strong for street use and last a long time due to closer...
Forum: Pontiac - Race 03-30-2026, 11:42 PM
Replies: 4
Views: 272
Posted By Tim Corcoran
The Doug 1-7/8 headers fit nice and clear...

The Doug 1-7/8 headers fit nice and clear everything (except my mid plate) with no denting my nice ceramic coated tubes with plenty of room for the oil filter. The mid plate I have that mounts...
Forum: Pontiac - Race 03-30-2026, 11:17 PM
Replies: 1
Views: 151
Posted By Tim Corcoran
Header evac system

Take a look at this youtube video. I did the same test under similar conditions with a leaf blower and I got the same results. With regards to the placement of the 1/2" pipe venturi tube for the evac...
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