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Search took 0.03 seconds. Search: Posts Made By: 1969GPSJ
Forum: Pontiac - Street 12-03-2023, 03:24 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Moonshine (with a little water) or Vodka also...

Moonshine (with a little water) or Vodka also worked. :3gears::drunk::beerchug::thumbup:
Forum: Pontiac - Street 12-03-2023, 03:15 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Thumbs up Cliff again covers all of the bases! Thanks!

Thanks for the Reply Cliff! Your replies pretty much put together all of the pieces that others had mentioned, and likely helped me come up with an improved "anti knock" interim plan for my 428. ...
Forum: Pontiac - Street 12-03-2023, 02:47 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
I am betting you are right. My gut says so, but...

I am betting you are right. My gut says so, but I have no experience to confirm.

My battered old '69 shop manual (printed in 1971) implies they did - on Page 6-40 it even shows a picture of all...
Forum: Pontiac - Street 12-03-2023, 02:23 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
I used water injection on another car a number of...

I used water injection on another car a number of years ago. Edelbrock actually had a system at that time. Worked really well with 50% distilled water and 50% methanol. I just seemed to run out at...
Forum: Pontiac - Street 12-02-2023, 11:58 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Thanks for the reply HWYSTR455. I am just...

Thanks for the reply HWYSTR455. I am just looking for some up to date information on something I have not paid a whole lot of attention to in the past few years. I thought that perhaps the thicker...
Forum: Pontiac - Street 12-02-2023, 10:19 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Yep that's the plan for stage II. Right now I...

Yep that's the plan for stage II. Right now I just want to get the car together and be driveable, safe, reliable and comfortable to drive. Then I will do the engine rebuild and aluminum heads, then...
Forum: Pontiac - Street 12-02-2023, 10:08 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
The difference between the 428 10.5:1 and 10.75:1...

The difference between the 428 10.5:1 and 10.75:1 engines was a piston without a dish. The same was true for the standard GTO/Tempest 400 and RA III - all at 10.75:1 and RA IV vs the 350 HP GP...
Forum: Pontiac - Street 12-02-2023, 09:23 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Hi Gach, in my first post of the thread I...

Hi Gach, in my first post of the thread I mentioned that the heads are 16 casting big valve, screw in stud 72cc (nominally) heads. I have not had the heads off of this engine. The engine, being a...
Forum: Pontiac - Street 12-02-2023, 07:48 PM
Replies: 19
Views: 1,082
Posted By 1969GPSJ
Is your battery securely bolted down? Years ago...

Is your battery securely bolted down? Years ago a friend had a similar problem, and the battery (which at the time was not properly bolted down :doh: ) was flopping over and grounding out the...
Forum: Pontiac - Street 12-02-2023, 07:28 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Car has not been on the road for quite a while,...

Car has not been on the road for quite a while, but it was very, very octane sensitive - even with the best (non race) pump gas available, so much so that I had to dial back the timing so much (from...
Forum: Pontiac - Street 12-02-2023, 07:16 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
This specific 428 engine has not previously been...

This specific 428 engine has not previously been apart, so the finish of the head and block would be as they were when they left the factory. I may end up using the Copper gaskets from Butler or...
Forum: Pontiac - Street 12-02-2023, 06:09 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Nope, the 16 casting heads I have cc'd have been...

Nope, the 16 casting heads I have cc'd have been consistently right around 72 ccs (low end 68 ccs, high end 74 ccs, but the low end may have had been resurfaced). Pontiac was pretty good with the...
Forum: Pontiac - Street 12-02-2023, 02:45 PM
Replies: 48
Views: 1,789
Posted By 1969GPSJ
Question Another "atypical" engine question - this time about head gaskets.

:attention
So until I get aluminum heads for my 428 (16 casting, 72 cc, big valve, screw in stud heads), I have been considering using thicker Cometic head gaskets with my stock cast iron heads....
Forum: THE LOBBY 11-16-2023, 01:14 AM
Replies: 70
Views: 5,457
Posted By 1969GPSJ
Exclamation Think the car world is full of stooopid or arrogant people? Imagine working EMS.

My son is an EMT-A, on his way to being a paramedic. He had huge altruistic ideals about helping people. :doh: Working EMS almost destroyed him - his encounters with the average EMS call works...
Forum: Pontiac - Street 11-07-2023, 11:26 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
I'm using coatings too. :) And I'm not looking at...

I'm using coatings too. :) And I'm not looking at any of this specifically to address a starting issue that I have never had with the HO manifolds. Just looking to reduce thermal exposure to the...
Forum: Pontiac - Street 11-07-2023, 10:06 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
Lightbulb Thanks Ted, but I'm not planning on wrapping the...

Thanks Ted, but I'm not planning on wrapping the manifold.

I am looking at adding heat shielding over part of the manifold to reduce underhood temps as well as other reasons mentioned in the...
Forum: Pontiac - Street 11-07-2023, 06:15 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
Thanks B-man. These are not new manifolds, they...

Thanks B-man. These are not new manifolds, they have been through thousands of heat cycles, so cracking is far less likely as long as they don't approach the super hot - compromising integrity heat...
Forum: Pontiac - Street 11-07-2023, 05:02 PM
Replies: 10
Views: 584
Posted By 1969GPSJ
I would contact Craig Wright ...

I would contact Craig Wright https://wrightconnection.net/ He will most likely know.
Forum: Pontiac - Street 11-07-2023, 04:56 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
I thought about that, that's why I am looking at...

I thought about that, that's why I am looking at a heat shield system which leaves most of the manifold facing the block open to the air, and that should reduce or eliminate condensation related...
Forum: Pontiac - Street 11-07-2023, 04:48 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
I am not overly concerned about heat soak, I am...

I am not overly concerned about heat soak, I am trying possibly improve scavenging and efficiency, keep the exhaust heat up for the O2 sensor, reduce underhood temperatures overall as well as protect...
Forum: Pontiac - Street 11-07-2023, 03:14 PM
Replies: 13
Views: 797
Posted By 1969GPSJ
Question Long branch HO manifolds: Has anyone ever used a wrap or heat shield on them?

I am thinking about either wrapping or using something like a flexible heat shield on my long branch manifolds on my GP. Has anyone done this on a B body car, Gen 1 Firebird, or '69-'72 GP that...
Forum: Heating & Cooling TECH 11-03-2023, 05:39 PM
Replies: 6
Views: 969
Posted By 1969GPSJ
I'm in the process of a complete frame-off for my...

I'm in the process of a complete frame-off for my '69 GP 428 4 speed SJ - consolidating 2 cars into 1, so I have a variety of components from each. 2 heater cores, 2 A/C boxes, 2 inside HVAC...
Forum: Heating & Cooling TECH 11-03-2023, 11:43 AM
Replies: 6
Views: 969
Posted By 1969GPSJ
Question Aluminum heater cores for classic pontiac cars - Any good?

It seems that the only readily available replacement heater cores are now aluminum. Does anyone have any experience with using these replacement heater cores, and how well have the held up in...
Forum: Pontiac - Street 11-01-2023, 06:32 PM
Replies: 44
Views: 2,043
Posted By 1969GPSJ
Coin flip on that one. My friend's '76 had both...

Coin flip on that one. My friend's '76 had both the countershaft boss machined, drilled and tapped, as well as the crank being machined for a pilot bearing. I have seen other similar engines that...
Forum: Members Helping Members 11-01-2023, 09:57 AM
Replies: 11
Views: 1,116
Posted By 1969GPSJ
Never, ever count on any lock to keep your...

Never, ever count on any lock to keep your trailer attached to your towing rig or the doors closed on an enclosed trailer. Almost all locks can be defeated by an amateur in under a minute - most in...
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