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PY Online Forums - Bringing the Pontiac Hobby Together
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Posts Made By:
74Grandville
Forum:
Pontiac - Street
01-26-2024, 02:31 PM
Replies:
46
Who has successfully installed a hydraulic flat tappet cam recently?
Views:
3,807
Posted By
74Grandville
Crower sft with crower lifters. Lucas muscle car...
Crower sft with crower lifters. Lucas muscle car 10w-30 oil. Correct valve spring pressure and geometry I’m sure helps.
I’ve had 2 failures in my life.
First was back in 2003 when I had no...
Forum:
Pontiac - Street
12-08-2023, 02:26 PM
Replies:
60
Cliff Ruggles
Views:
8,147
Posted By
74Grandville
both of these are great books!! i've learned so...
both of these are great books!! i've learned so much from them. Thank you Cliff!!
Forum:
Pontiac - Street
11-16-2023, 01:20 PM
Replies:
53
1978 400 cam upgrade?
Views:
2,694
Posted By
74Grandville
another vote for the Summit 2800, The stock L78...
another vote for the Summit 2800, The stock L78 cam is tinny.
2801 might work too, but with the bevel stock piston, compression will still be pretty low.
Forum:
Pontiac - Street
10-08-2023, 08:00 PM
Replies:
8
RA IV vacuum
Views:
1,124
Posted By
74Grandville
i'm not an expert on RAIV, but i think that is...
i'm not an expert on RAIV, but i think that is normal for factory 400 RAIV. That is a big cam!
i'm running a crower solid 60311 in a 428 at 10.6:1 compression and only see ~6-7 hg. i think of...
Forum:
Pontiac - Street
09-05-2023, 11:22 AM
Replies:
27
Poll:
The Long Road... 74 Bonneville
Views:
1,867
Posted By
74Grandville
Great Thread!! reminds me of my 74Grandville. it...
Great Thread!! reminds me of my 74Grandville. it was the car that got me into the hobby.
Forum:
Pontiac - Street
06-15-2023, 05:22 PM
Replies:
23
428 SpeedMaster heads Dyno Results
Views:
2,034
Posted By
74Grandville
Correct, that is the current setup. I did some...
Correct, that is the current setup. I did some initial porting to raise the roof on the HSD, but found I needed to have it machined some to fit my setup properly. my machinist ended up having...
Forum:
Pontiac - Street
06-14-2023, 08:56 PM
Replies:
23
428 SpeedMaster heads Dyno Results
Views:
2,034
Posted By
74Grandville
So I actually did 2 engine swaps last year. the...
So I actually did 2 engine swaps last year. the engine in my 77 finally failed, but the 428 was to rowdy for that car i felt. I moved the W72 I built from my TA to the Formula and installed the 428...
Forum:
Pontiac - Street
06-14-2023, 08:52 PM
Replies:
23
428 SpeedMaster heads Dyno Results
Views:
2,034
Posted By
74Grandville
More
More
Forum:
Pontiac - Street
06-14-2023, 08:28 PM
Replies:
23
428 SpeedMaster heads Dyno Results
Views:
2,034
Posted By
74Grandville
https://youtu.be/0yZj5-n_Qpg @Steve - I...
https://youtu.be/0yZj5-n_Qpg
@Steve - I stole your idea about blocking the 4bolt holes. I bought ball bearings and tighten a stud onto them to hopefully strenghen the area. I used red loctite on...
Forum:
Pontiac - Street
06-14-2023, 03:59 PM
Replies:
23
428 SpeedMaster heads Dyno Results
Views:
2,034
Posted By
74Grandville
428 SpeedMaster heads Dyno Results
HI guys, I'd figured i'd post some results of a Chassis Dyno pull I just had done on my car. This was not a tuning session, but i did have them raise the timing 2 degrees. I ended up with 400HP and...
Forum:
Pontiac - Street
05-31-2023, 08:01 AM
Replies:
22
455 identification.?
Views:
1,541
Posted By
74Grandville
I’ve owned a 70 455 YH. It had 2bolt main caps ...
I’ve owned a 70 455 YH. It had 2bolt main caps
Sent from my iPhone using Tapatalk
Forum:
Pontiac - Street
03-22-2023, 09:39 PM
Replies:
20
Compression
Views:
2,162
Posted By
74Grandville
a thick head gasket is a bad idea. better to run...
a thick head gasket is a bad idea. better to run a dished piston.
Forum:
Pontiac - Street
03-14-2023, 12:48 PM
Replies:
21
Oil Restricted Pushrods
Views:
1,706
Posted By
74Grandville
I went with restricted in my application as I...
I went with restricted in my application as I have full roller rockers and speed master heads. The drain back on the speed masters doesn’t look as good as factory.
Sent from my iPhone using...
Forum:
Pontiac - Street
01-26-2023, 01:01 PM
Replies:
44
What thermostat to use, 180 or 195 ?
Views:
3,822
Posted By
74Grandville
180 and a good cooling system has worked for me...
180 and a good cooling system has worked for me (clutch fan, 4 core copper or 2 Core alluminum radiator and proper tune.)
195 you'll probably fight Detonation.
Forum:
Pontiac - Street
01-26-2023, 12:45 PM
Replies:
9
Engine oil priming
Views:
980
Posted By
74Grandville
never heard of anyone drilling the plugs in the...
never heard of anyone drilling the plugs in the front of the block to lube chain. why modify what the factory did?
Forum:
Pontiac - Street
12-30-2022, 06:08 PM
Replies:
17
Oil pan question
Views:
2,380
Posted By
74Grandville
I would use some oil resistant RTV between the...
I would use some oil resistant RTV between the pan and the cork gasket that goes over the rear main cap. Original pan had an indent to hold the cork in place where the summit pan doesn't have that...
Forum:
Pontiac - Street
11-22-2022, 08:38 PM
Replies:
87
Speedmaster heads
Views:
19,463
Posted By
74Grandville
I finally got my engine running with the...
I finally got my engine running with the speedmasters i picked up around 2018. So far so good. it's been 3 days since breakin.
couple things I did
1. I smoothed the sharp edges in ports.
2....
Forum:
Pontiac - Street
10-04-2022, 03:06 PM
Replies:
15
400 RA3 .060 make into a 455. What do I need?
Views:
1,349
Posted By
74Grandville
not a good idea. carb tune, distributor tune...
not a good idea.
carb tune, distributor tune and make sure the engine is running cool are your best options. might want to consider cam choice as well.
Forum:
Pontiac - Street
07-05-2022, 08:33 PM
Replies:
20
Crankshaft end play
Views:
2,496
Posted By
74Grandville
Crankshaft end play
No
Spec is 6-11 thou
Sent from my iPhone using Tapatalk
Forum:
Pontiac - Street
06-05-2022, 06:28 PM
Replies:
73
Ponyakr
Views:
9,049
Posted By
74Grandville
Sorry for your loss T.J. He will be missed.
Sorry for your loss T.J. He will be missed.
Forum:
Pontiac - Street
06-01-2022, 11:06 PM
Replies:
13
QuadraJet - Cause of primary metering rods to be bent?
Views:
2,207
Posted By
74Grandville
someone probably tightened the Q-jet top without...
someone probably tightened the Q-jet top without ensuring the rods were in the jets and held in by the collar.
your carb will run much better once this is corrected ;)
Forum:
Pontiac - Street
05-31-2022, 09:39 PM
Replies:
57
QuadraJet - Which secondary metering rod to use?
Views:
8,390
Posted By
74Grandville
your questions have the correct answers. the...
your questions have the correct answers. the other consideration is the hanger. A = richer Z = Leaner
i did a quick search on google.
https://www.carburetion.com/rodshang.asp
...
Forum:
Pontiac - Street
03-23-2022, 10:36 AM
Replies:
25
Value of #48 Heads
Views:
2,947
Posted By
74Grandville
48's have a 350 chamber, 62 has a 400 chamber....
48's have a 350 chamber, 62 has a 400 chamber. this can be seen when placing a gasket on them.
Forum:
Pontiac - Street
03-14-2022, 06:40 PM
Replies:
22
Are These Stock W72 Pistons?
Views:
3,760
Posted By
74Grandville
The Same. the difference was in the heads/cam...
The Same. the difference was in the heads/cam not the pistons
Forum:
Pontiac - Street
03-12-2022, 07:17 PM
Replies:
6
What is this?
Views:
1,039
Posted By
74Grandville
It’s to control the vacuum advance depending on...
It’s to control the vacuum advance depending on temp.
Pic is wrong year, but same idea.https://uploads.tapatalk-cdn.com/20220312/179243731ac06d473608ebb14e4f9400.gif
Sent from my iPhone...
Showing results 1 to 25 of 30
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