Home Menu

Menu


          
PY Online Forums - Bringing the Pontiac Hobby Together > Search Forums > Search Results
Page 1 of 2 1 2
Showing results 1 to 25 of 45
Search took 0.01 seconds. Search: Posts Made By: chiphead
Forum: Pontiac - Street 09-24-2019, 03:50 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
I agree. .040" skirt OD reduction, collapse,...

I agree. .040" skirt OD reduction, collapse, whatever, between the gauge point and the bottom of the skirt is a lot. Is it all on one side, or both sides? Is any skirt deformation showing? Is it...
Forum: Pontiac - Street 09-24-2019, 09:56 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
If I don't win, I want a framed picture of the...

If I don't win, I want a framed picture of the piston as a consolation prize. LOL

As far as collateral damage from a spun bearing, that's a theoretical debate that could keep this thread going...
Forum: Pontiac - Street 09-23-2019, 03:35 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Just sayin...... *GRIN EMOJI*

Just sayin...... *GRIN EMOJI*
Forum: Pontiac - Street 09-23-2019, 03:27 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Congrats to all involved. Hopefully the car can...

Congrats to all involved. Hopefully the car can get back to ruining tires. I want to see some smoky gopro footage of this thing getting crossed up.

So where did the damaged piston go? It...
Forum: Pontiac - Street 08-27-2019, 08:40 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
I don't think you want to run it without a...

I don't think you want to run it without a balancer. The bottom timing gear might walk, since its held in place by the balancer snout.
Forum: Pontiac - Street 08-26-2019, 10:08 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
Every builder has a couple of go-to recipes of...

Every builder has a couple of go-to recipes of parts that he's familiar with and worked for him on previous builds. I'm sure the Romac falls into that category.
Paul K recommended the Pro-Race...
Forum: Pontiac - Street 08-26-2019, 09:18 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
Ditto on the front seal. Usually it bottoms...

Ditto on the front seal. Usually it bottoms before the lip perfectly hits the timing cover. Never had a problem with a major leak there. It's common to have some oil residue or a slow drip,...
Forum: Pontiac - Street 08-22-2019, 02:07 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Is the mark inside the red circle cause for...

Is the mark inside the red circle cause for concern?
Forum: Pontiac - Street 08-22-2019, 08:35 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
455 block with stock 455 crankshaft. I see it...

455 block with stock 455 crankshaft. I see it now, that's the counterweight passing under the cam every revolution. What if the counterweight is kissing the pump shaft or the bottom of the dizzy...
Forum: Pontiac - Street 08-21-2019, 05:03 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Give that man a cigar. WTF is that? Is that the...

Give that man a cigar. WTF is that? Is that the back of the cam, near the rear cam journal? That can't be right. There shouldn't be anything between the gear and the rear cam journal.

Edit: ...
Forum: Pontiac - Street 08-20-2019, 09:54 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Confirmation of piston material is helpful. My...

Confirmation of piston material is helpful. My motor made a dull double knock noise at TDC and BDC, especially when engine wasn't warmed up. Since (most? all?) 8 cylinders were doing it, it had a...
Forum: Pontiac - Street 08-20-2019, 06:56 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
I get that, you don't want to throw more money...

I get that, you don't want to throw more money down a hole. The challenge here is that if the engine gets diassembled, it's likely going to need major component replacement to rectify the noise. If...
Forum: Pontiac - Street 08-20-2019, 10:03 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
Is Jim "Mr P-body" LeHart still at CVM or did he...

Is Jim "Mr P-body" LeHart still at CVM or did he retire? I got a set of custom pistons from him years ago for a 400 build. At the time he was very knowledgeable and passionate about Pontiac...
Forum: Pontiac - Street 08-19-2019, 09:15 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
I don't think you can put much stock in what the...

I don't think you can put much stock in what the piston crowns and chambers look like. This is a high performance engine that's done nothing but idle for 2 years. It's had all 12 disciples, every...
Forum: Pontiac - Street 08-17-2019, 03:36 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Yeah, the more I think about it, based on the...

Yeah, the more I think about it, based on the discussion, the history and the youtube videos, I'm thinking piston slap or a wrist pin issue. That would be impossible to diagnose in the car, would...
Forum: Pontiac - Street 07-29-2019, 02:58 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
I agree, he knows and does all these things...

I agree, he knows and does all these things during a build that uses aftermarket bottom end parts. So where are the numbers? It's not in the data that Joe was given. Does Paul have this documented...
Forum: Pontiac - Street 07-29-2019, 12:44 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
How do you know this has been addressed in this...

How do you know this has been addressed in this build? Have you been inside this engine? Do you have documentation of the parts used and clearances in question in this engine?

The shop that...
Forum: Pontiac - Street 07-29-2019, 12:15 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
So what are the compression test numbers, with...

So what are the compression test numbers, with all 8 plugs out and throttle at WOT? Gotta test with a charged battery, as a weak battery will produce low numbers.

Low compression could indicate...
Forum: Pontiac - Street 07-26-2019, 03:25 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
Do you guys really think that a new 400#...

Do you guys really think that a new 400# valvespring on a properly set up head, with low mileage is going to be thwarted by some fuel varnish on a valvestem? Heck, spray some carb cleaner down the...
Forum: Pontiac - Street 07-25-2019, 04:46 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
I feel really bad, since I was one of the guys...

I feel really bad, since I was one of the guys that advised sending it back to the builder. I'm really shocked this noise is still there.

I would say wrist pin knock, but Paul would have caught...
Forum: Pontiac - Street 07-24-2019, 12:48 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
In latest vids, it's a little "heavy" a noise to...

In latest vids, it's a little "heavy" a noise to be just rocker clicking. If it was just valvetrain noise, I'd say "run it". It does sound like it's in the rear of the motor/engine bay area.
...
Forum: Pontiac - Street 03-19-2019, 10:24 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
The top bearing was still in good shape. Without...

The top bearing was still in good shape. Without a major rotor phasing error, the timing will be pretty steady. You would have to check it pretty closely to find it. Maybe the old 1 to 6 cyl...
Forum: Pontiac - Street 02-28-2019, 05:27 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
My 400 had mild piston slap with 2618 forgings at...

My 400 had mild piston slap with 2618 forgings at .005" skirt to wall. Sounded like a rhythmic dull slap/rap above the pan rail on both sides. It would go away once water temp went over 150F. ...
Forum: Pontiac - Street 02-05-2019, 12:42 PM
Replies: 1,465
Views: 155,439
Posted By chiphead
*constructive criticism incoming* You've...

*constructive criticism incoming*

You've been janking with this thing forever. The noise is coming from inside the engine. Why is it not out and apart?

Your best opportunity to send it back...
Forum: Pontiac - Street 10-03-2018, 11:51 AM
Replies: 1,465
Views: 155,439
Posted By chiphead
Good questions. If it's not the windage tray or...

Good questions. If it's not the windage tray or the oil pan, it COULD be an exhaust tick. That would be something that the builder would not have seen. I built a new motor for my Silvy, and during...
Showing results 1 to 25 of 45
Page 1 of 2 1 2

 
Forum Jump

All times are GMT -4. The time now is 04:45 PM.

 

About Us

The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.

 




Contact Us Home
Copyright © 2017