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PY Online Forums - Bringing the Pontiac Hobby Together
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Forum:
Pontiac - Street
Today, 06:41 AM
Replies:
11
Fuel pump?
Views:
342
Posted By
dhcarguy
Interesting, When I get a chance, I will run my...
Interesting, When I get a chance, I will run my car at full throttle and let you how it does. Hate to think I did this for nothing
Forum:
THE LOBBY
Today, 12:19 AM
Replies:
472
What did you do with your Pontiac today?
Views:
34,509
Posted By
65 Lamnas
Got the Q-jet back together after refinishing....
Got the Q-jet back together after refinishing. Made a deal for a HSD intake.....not sure yet what to do with it.....it's excellent....brand new even.....no box but obviously never used.
Going to...
Forum:
66-67 GTO Tempest & LeMans TECH
Yesterday, 11:34 PM
Replies:
141
66 survivor original owner pulled from garage
Views:
7,032
Posted By
Tedd930
Drivetrain back in car need one more suggestion
Hopefully Mr Barron sees this this ! My engine is back in and the mechanical work is complete
Except replacing the exhaust system I obviously want to keep it factory style .. so just a few...
Forum:
THE LOBBY
Yesterday, 11:04 PM
Replies:
472
What did you do with your Pontiac today?
Views:
34,509
Posted By
kingbuzzo
Great reward dad 👌
Great reward dad 👌
Forum:
THE LOBBY
Yesterday, 09:44 PM
Replies:
472
What did you do with your Pontiac today?
Views:
34,509
Posted By
67drake
Finally got one of the Pontiac’s out! Got my...
Finally got one of the Pontiac’s out!
Got my Mercury that I did the engine rebuild on drivable now. So pulled it out and swapped positions in the garage with the ‘63 LeMans.
Lemans is running...
Forum:
70-73 Firebird & TA TECH
Yesterday, 09:20 PM
Replies:
18
Gauge Cluster Restoration
Views:
1,001
Posted By
70GS455
My conversion will allow your tach to operate...
My conversion will allow your tach to operate with only one wire and will be compatible with points, HEI, MSD box with the dedicated tach wire, or any points conversion ignition that is not multi...
Forum:
77-81 Firebird & Trans Am TECH
Yesterday, 07:35 PM
Replies:
9
1981 Turbo T/A
Views:
619
Posted By
KSZR
Now my check engine light is back on and idle is...
Now my check engine light is back on and idle is weird. Need to pull the code.
Forum:
Pontiac - Street
Yesterday, 04:49 PM
Replies:
6
AR3924 vs. 3924 autolite
Views:
246
Posted By
Formulajones
I figure anything you can do to help the...
I figure anything you can do to help the combustion process is a good thing.
I've never dyno'd the change myself so can't comment, I just do it for the simple reason of trying to get the spark out...
Forum:
Pontiac - Street
Yesterday, 02:30 PM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
steve25
I am trying to find my notes from 25 years ago ...
I am trying to find my notes from 25 years ago in regards to the valve to piston clearance deal, but here’s what I recall off of the top of my head.
Using 428 pistons in a 421 build with its...
Forum:
Pontiac - Street
Yesterday, 01:36 PM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
b-man
Not really because the 421 block has a pretty...
Not really because the 421 block has a pretty robust casting compared to the 389s. However that much overbore kind of diminishes the value to a certain extent. When I bought my 421 it was standard...
Forum:
Pontiac - Street
Yesterday, 12:35 PM
Replies:
35
High Torque Starters
Views:
1,284
Posted By
track73
It works great I used a Ford G switch to shut it...
It works great I used a Ford G switch to shut it off incase of an accident. I only had one problem and that was some varnish got into the small jet into the aluminum container after a winter...
Forum:
Pontiac - Street
Yesterday, 12:10 PM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
b-man
Absolutely not 421 pistons. The valve reliefs are...
Absolutely not 421 pistons. The valve reliefs are completely different on a 421.
The valve reliefs and dish shown are what forged 428 replacement TRW/Sealed Power 12cc pistons all look like.
...
Forum:
Pontiac - Street
Yesterday, 11:53 AM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
b-man
Standard bore size is 4.09375” for the 421. ...
Standard bore size is 4.09375” for the 421.
4.120” is standard bore for the 428.
4.160” is +.040” for the 428 pistons so you’re poking that 421 .06625” over which seems excessive unless the...
Forum:
Pontiac - Street
Yesterday, 11:30 AM
Replies:
11
Fuel pump?
Views:
342
Posted By
steve25
With only 3 psi to feed even just one Carb no...
With only 3 psi to feed even just one Carb no less 3 would not run the motor to full throttle and expect nothing less then the motor falling on its face within 4 seconds.or by the time you get...
Forum:
Pontiac - Street
Yesterday, 10:58 AM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
John Milner
The pin height will be the same. You would just...
The pin height will be the same. You would just have to be careful about running much lift if you used the 76 heads as the valve angles do not match up with the valve reliefs in the 428 pistons. I...
Forum:
Pontiac - Race
Yesterday, 10:37 AM
Replies:
21
1820 HP 505 CID pump gas engine
Views:
1,128
Posted By
Jim Robertson
Very nice results at a very mild boost number. ...
Very nice results at a very mild boost number. Congrats to Scott and Don S. on a super cool build using some very special custom pieces.
Not sure how many on here remember or were at Norwalk a...
Forum:
Pontiac - Street
Yesterday, 10:23 AM
Replies:
5
77 T/A help identifying this part
Views:
169
Posted By
Skip Fix
Hope you are getting a new tank!
Hope you are getting a new tank!
Forum:
70-73 Firebird & TA TECH
Yesterday, 10:18 AM
Replies:
18
Gauge Cluster Restoration
Views:
1,001
Posted By
MDSHARK81
Redline Gauge works in Santa Clarita, California....
Redline Gauge works in Santa Clarita, California. Got it. Thank You.
Forum:
77-81 Firebird & Trans Am TECH
Yesterday, 10:18 AM
Replies:
15
Radio delete plate
Views:
402
Posted By
starlightblack
1977
1977
Forum:
Pontiac - Street
Yesterday, 09:51 AM
Replies:
18
What’s this 421 worth?
Views:
465
Posted By
tom s
Those look like 428 pistons.Tom
Those look like 428 pistons.Tom
Forum:
Pontiac - Street
Yesterday, 09:12 AM
Replies:
4
Tie Down Classic Car
Views:
158
Posted By
J.C.you
Tire straps
Tire straps
Forum:
61-77 GTO LeMans & Tempests FOR SALE
Yesterday, 08:13 AM
Replies:
0
1971 Lemans Sport convertible, Gen V 5.3 w/TKX
Views:
92
Posted By
Scarebird
1971 Lemans Sport convertible, Gen V 5.3 w/TKX
This car is a recently finished frame-off, resprayed in Lucernes Blue and all metalwork/paint professionally done. Piant is excellent - no scratches or dents.
...
Forum:
THE LOBBY
Yesterday, 06:02 AM
Replies:
6,104
vintage photo thread...
Views:
533,221
Posted By
camerjeff
Ed That model is the closest I have seen so far!...
Ed That model is the closest I have seen so far! But the dash and rear 1/4 shape does not match IMO, but it could be a model year variation as many small manufactures bodies varied quite a bit car to...
Forum:
THE LOBBY
05-02-2024, 09:14 PM
Replies:
18
68 GTO convertible values?
Views:
388
Posted By
keith k
You don't see too many 68 GTOs with Rally I...
You don't see too many 68 GTOs with Rally I wheels....
Forum:
THE LOBBY
05-02-2024, 08:31 PM
Replies:
18
68 GTO convertible values?
Views:
388
Posted By
71GP76TA
$50,000 based on the provided picture and...
$50,000 based on the provided picture and description.
Showing results 1 to 25 of 500
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