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Forum: Pontiac - Street 12-27-2021, 08:19 PM
Replies: 39
Views: 4,902
Posted By pastry_chef
The smallest Comp High Energy lobe 5224 is 256 @...

The smallest Comp High Energy lobe 5224 is 256 @ .003

From Harold in Sept 2009,
- duration at .004", where the SAE has decided that hydraulic durations begin and end.


High Energy 5200 is...
Forum: Pontiac - Street 12-26-2021, 11:18 PM
Replies: 39
Views: 4,902
Posted By pastry_chef
Having those would be nice. :) For many...

Having those would be nice. :)
For many historical engine cam lobes.

Blessed with a large lotto win,, I'd be inclined to buy up and scan nearly everything I could get. GM, Mopar and Ford.

I...
Forum: Pontiac - Race 12-25-2021, 08:22 PM
Replies: 10
Views: 1,889
Posted By pastry_chef
I saved this back in 2003.

I saved this back in 2003.
Forum: Pontiac - Street 12-25-2021, 12:00 AM
Replies: 39
Views: 4,902
Posted By pastry_chef
A source has this. 1977 Manual Transmission...

A source has this.

1977 Manual Transmission W72 Camshaft Specifications
Part # 549431

Intake Duration 274 Degrees
Open 21 Degrees B.T.D.C
Close 73 Degrees A.B.D.C.
Valve Lift .364
Intake...
Forum: Pontiac - Street 12-14-2021, 06:44 PM
Replies: 17
Views: 2,962
Posted By pastry_chef
The old Comp 1332-16 worked fine with 670 Iron...

The old Comp 1332-16 worked fine with 670 Iron and E-heads.
Buddy called Comp, they basically said. "we can't say they will fit" but they wouldn't deny it either.

Thousands of street miles on...
Forum: Pontiac - Street 12-01-2021, 11:17 AM
Replies: 241
Views: 26,724
Posted By pastry_chef
Mast.. Rolls Royce of the LS world. If I...

Mast.. Rolls Royce of the LS world.

If I was looking for 700 to 800 HP on pump gas.. I'd probably look to the Dart 280 LS3.

Many great options....
Forum: Pontiac - Street 11-30-2021, 01:14 PM
Replies: 241
Views: 26,724
Posted By pastry_chef
An intelligent person looks at LS3. lol ...

An intelligent person looks at LS3. lol
https://www.motortrend.com/how-to/hrdp-1102-ls3-l92-rectangle-port-cylinder-heads-test/

I know it is hard.. just so hard.. lol
Forum: Pontiac - Street 11-28-2021, 07:19 PM
Replies: 241
Views: 26,724
Posted By pastry_chef
lol Heavy SUV.. 416 LS engine -- breaks...

lol

Heavy SUV.. 416 LS engine -- breaks 11's -- goes at 2:14 in the video.

Super smooth idle.

https://www.youtube.com/watch?v=rGu3TZEqGKc
Forum: Pontiac - Street 10-21-2021, 07:02 PM
Replies: 57
Views: 5,861
Posted By pastry_chef
Four image comparisons attached. ...

Four image comparisons attached.

https://i.imgur.com/i0geKh2.png
Forum: Pontiac - Street 10-10-2021, 11:04 PM
Replies: 46
Views: 3,948
Posted By pastry_chef
Len Williams 455 with stock heads rated about 425...

Len Williams 455 with stock heads rated about 425 HP.
http://www.lenwilliamsautomachine.com/455_Long_Block.html

Seems stock intake / heads are the bottleneck around that power level.
Forum: Pontiac - Street 10-08-2021, 08:41 PM
Replies: 89
Views: 10,866
Posted By pastry_chef
Thanks. For the 2800 card looks like 262/ 272...

Thanks.
For the 2800 card looks like 262/ 272 is printed for advertised. Much better than 278 / 288 from the Summit website.
I wonder if some of these differences are due to varied suppliers over...
Forum: Pontiac - Street 10-06-2021, 08:15 PM
Replies: 49
Views: 5,771
Posted By pastry_chef
Old 2007 thread on Speed-talk I made a PDF file...

Old 2007 thread on Speed-talk I made a PDF file from. Pleased to see we can still browse it.
https://www.speed-talk.com/forum/viewtopic.php?t=6211

Sun Apr 22, 2007 comment from Darin Morgan.
Forum: Pontiac - Street 09-11-2021, 06:42 PM
Replies: 64
Views: 5,574
Posted By pastry_chef
A buddy used 3.42 gears with his 2004R behind his...

A buddy used 3.42 gears with his 2004R behind his 455.
Nice combination.
Forum: Pontiac - Race 08-23-2021, 06:59 PM
Replies: 8
Views: 1,718
Posted By pastry_chef
Example: Andy / Torquewar, a 578 HP engine ...

Example:

Andy / Torquewar, a 578 HP engine

hyd grind . 400 lobe
249 / 233 @ .050
110 LSA / 107

1.65s rocker on intake and 1.5s exh. Tried 1.6s on ex for a test and lost 22 hp.
Forum: Pontiac - Street 07-03-2021, 03:54 PM
Replies: 35
Views: 3,558
Posted By pastry_chef
Looks good.

Looks good.
Forum: Pontiac - Street 06-28-2021, 02:09 PM
Replies: 64
Views: 10,510
Posted By pastry_chef
OCMDGTO, looks like 245/251D .561/.594 I...

OCMDGTO, looks like 245/251D .561/.594

I like it. Curious on the LSA and idle vacuum.
Forum: Pontiac - Street 06-28-2021, 12:16 PM
Replies: 35
Views: 3,558
Posted By pastry_chef
Different rockers locate their pushrod seat...

Different rockers locate their pushrod seat differently. Aftermarket rocker ratios will differ slightly, stamped steel ratio will differ more.

I'd also wait for the new rockers.
Forum: Pontiac - Street 06-27-2021, 10:09 PM
Replies: 35
Views: 3,558
Posted By pastry_chef
Post 23 looks like about as good as you'll get. ...

Post 23 looks like about as good as you'll get.

Edit.. maybe 9.2 is better,, looks more narrow IMO.
Forum: Pontiac - Street 06-27-2021, 10:07 PM
Replies: 64
Views: 10,510
Posted By pastry_chef
Agree with Tom here.

Agree with Tom here.
Forum: Pontiac - Street 06-27-2021, 09:45 PM
Replies: 64
Views: 10,510
Posted By pastry_chef
If I wanted to run a 350 Pontiac to 6000 RPM,...

If I wanted to run a 350 Pontiac to 6000 RPM, dport 260 CFM intake / 210 CFM exhaust. 1.65 rockers. 2.11 intake valve.

Image.
This tool is conservative on LSA, depending on other analysis I...
Forum: Pontiac - Street 06-27-2021, 09:34 PM
Replies: 64
Views: 10,510
Posted By pastry_chef
And more valve lift and recommended cylinder flow...

And more valve lift and recommended cylinder flow than is seen for typical Pontiac applications. :)
Forum: Pontiac - Street 06-27-2021, 08:02 PM
Replies: 35
Views: 3,558
Posted By pastry_chef
The pattern is wide even when you are not moving...

The pattern is wide even when you are not moving the rocker across the lift range. :)
That explains much.
Forum: Pontiac - Street 06-27-2021, 07:51 PM
Replies: 64
Views: 10,510
Posted By pastry_chef
Yup, who said this exactly? 463 Pontiac...

Yup, who said this exactly?

463 Pontiac target for 5300 RPM, so about an OF size cam. This is 2021 folks, I have a lot more than this.

Having less than optimal valve seat duration or area does...
Forum: Pontiac - Street 06-27-2021, 07:26 PM
Replies: 35
Views: 3,558
Posted By pastry_chef
Looks you need a longer pushrod from your first...

Looks you need a longer pushrod from your first post. Not the second.

Try this:

Set the lifter on the base circle of the cam. Now set the adjustable pushrod in place and adjust the rocker...
Forum: Pontiac - Street 06-27-2021, 01:31 AM
Replies: 64
Views: 10,510
Posted By pastry_chef
What is noted in catalogs is a very general...

What is noted in catalogs is a very general guide. For what you will be doing you don't need more than 285 to 290 seat duration. With iron heads the compression you noted is fine.

You could also...
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