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Forum: Pontiac - Street 03-25-2024, 10:40 AM
Replies: 6
Views: 215
Posted By Steve C.
At one time Auburn had an exchange program for a...

At one time Auburn had an exchange program for a new unit. Send it in and for a modest fee they would provide a new one, this to counter the bad rap that they are not rebuildable.

For years I ran...
Forum: Pontiac - Street 03-21-2024, 10:02 AM
Replies: 43
Views: 1,144
Posted By Steve C.
Dave Bisschop's custom 'Road Paver' uses Comp...

Dave Bisschop's custom 'Road Paver' uses Comp High Lift Magnum lobes.

Lobes 3115 and 3116 and typically ordered with a "B" lobe suffix code.

Used with a Pontiac cam journal size the rated...
Forum: Pontiac - Street 03-17-2024, 07:52 PM
Replies: 34
Views: 1,191
Posted By Steve C.
Example, using the intake lobes for conversation...

Example, using the intake lobes for conversation in comparing the Crowers tiny 60240 cam to one at Bullet Racing, their HF260/300 lobe.

The Bullet lobe has less advertised duration with 260...
Forum: Pontiac - Street 03-17-2024, 07:22 PM
Replies: 34
Views: 1,191
Posted By Steve C.
The tighter lobe separation might be helpful for...

The tighter lobe separation might be helpful for a lower compression. But in the OPs situation wanting the 'smooth idle' it would be negative because the Idle quality would suffer.
That said a...
Forum: Pontiac - Street 03-17-2024, 03:24 PM
Replies: 34
Views: 1,191
Posted By Steve C.
EFFECTS OF CHANGING LOBE SEPERATION ANGLE (LSA)...

EFFECTS OF CHANGING LOBE SEPERATION ANGLE (LSA) HERE:

https://www.compcams.com/cam-timing-lobe-separation-angle


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Forum: Pontiac - Street 02-28-2024, 08:04 PM
Replies: 5
Views: 521
Posted By Steve C.
Very similar to Butler custom except with an...

Very similar to Butler custom except with an additional 6 degrees exhaust duration. They are COMP XE lobes.
...
Forum: Pontiac - Street 02-24-2024, 07:18 PM
Replies: 19
Views: 807
Posted By Steve C.
Paul mentioned my previous 600 hp 462cid combo. ...

Paul mentioned my previous 600 hp 462cid combo.

During the dyno session we tested a Holley Street Dominator intake that was worked by Dave Bisschop with a 1/2" open spacer and it made 589.4 hp at...
Forum: Pontiac - Street 02-22-2024, 08:06 PM
Replies: 21
Views: 1,095
Posted By Steve C.
" Jim became renowned for his work at Edelbrock...

" Jim became renowned for his work at Edelbrock as vice president of R&D through the ‘70s and ‘80s. "

Here he stands beside a brand-new '67 Chevy Camaro.
It was the first-ever Camaro shipped to...
Forum: Pontiac - Street 02-22-2024, 07:13 PM
Replies: 29
Views: 1,751
Posted By Steve C.
The magic ingredient comes in the form of the...

The magic ingredient comes in the form of the Indian Adventures "Tall Deck" block

https://www.motortrend.com/features/0612phr-601-inch-street-pontiac-engine/

I found this thread of particular...
Forum: Pontiac - Street 02-22-2024, 05:27 PM
Replies: 21
Views: 1,095
Posted By Steve C.
Jim was native Texan and he earned a degree in...

Jim was native Texan and he earned a degree in mechanical engineering from the University of Texas. When I lived in Austin his home was not far from where I lived.
I collected a bunch of his...
Forum: Pontiac - Street 02-22-2024, 01:46 PM
Replies: 21
Views: 1,095
Posted By Steve C.
Related, Jim McFarland published quite a bit in...

Related, Jim McFarland published quite a bit in Circle Track magazine including tech material on dimpling.

https://www.motortrend.com/how-to/enginology-mixture-motion/
...
Forum: Pontiac - Street 02-20-2024, 10:11 PM
Replies: 12
Views: 542
Posted By Steve C.
Related topic.... When evaluating total...

Related topic....

When evaluating total engine oil capacity, a tid bit to consider, many common oil filters used do not hold one quart of oil.
Next time you change oil filters, fill the new...
Forum: Pontiac - Street 02-17-2024, 09:46 AM
Replies: 99
Views: 4,692
Posted By Steve C.
A rhetorical question and one that might set...

A rhetorical question and one that might set aside any political opinion.

In general, if an oil filter has a strong burst-resistant steel canister, a strong filter element with supported pleats,...
Forum: Pontiac - Street 02-15-2024, 06:26 PM
Replies: 47
Views: 1,530
Posted By Steve C.
Rocker ratio's effect on duration ...

Rocker ratio's effect on duration

https://www.speed-talk.com/forum/viewtopic.php?t=11349

Note Mike Jones example provided and his comments in this thread.


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Forum: Pontiac - Street 02-15-2024, 01:28 PM
Replies: 47
Views: 1,530
Posted By Steve C.
"An increase in rocker arm ratio nets more than...

"An increase in rocker arm ratio nets more than additional lift. It will also change the cam's duration characteristics. Because the increased ratio effectively speeds up valve movement, that means...
Forum: Pontiac - Street 02-15-2024, 11:32 AM
Replies: 47
Views: 1,530
Posted By Steve C.
Valve Lash with a change to higher ratio rockers ...

Valve Lash with a change to higher ratio rockers
Divide the Old Lash by the Old Rocker Ratio, then multiply by the New Rocker Ratio to get the New Lash.

How does the ramp design*factor in ?
This...
Forum: Pontiac - Street 02-12-2024, 11:16 AM
Replies: 53
Views: 2,367
Posted By Steve C.
Ask Steve C to post a pic of his original 70...

Ask Steve C to post a pic of his original 70 RAIII iron intake, it's just as bad.

Pictures here in post #9

The subject of the thread was Stock intake manifold sealing.
...
Forum: Pontiac - Street 02-10-2024, 11:02 PM
Replies: 88
Views: 2,852
Posted By Steve C.
A tid bit for interest, and related in post # 81...

A tid bit for interest, and related in post # 81 by ta man and his comment:

"When I go up in height I use an air pan setup with a small filter for the street and no filter for the track"

I have...
Forum: Pontiac - Race 02-07-2024, 08:09 PM
Replies: 4
Views: 348
Posted By Steve C.
In the past when talking with Crower they were...

In the past when talking with Crower they were very adamant about using no lifter bore restrictors. I do not know if they have a "Chevy" type oiling system on their mind with this "catalog...
Forum: Pontiac - Street 02-03-2024, 11:55 AM
Replies: 57
Views: 2,819
Posted By Steve C.
I'll give everyone a very very short history of...

I'll give everyone a very very short history of me, so you'll know where I came from.

1969---Went to work for State of Mississippi as computer operator, rose to be lead operator at CDPA, Central...
Forum: Pontiac - Street 02-02-2024, 10:20 AM
Replies: 57
Views: 2,819
Posted By Steve C.
From Pontiac engineer Malcolm "Mac" McKellar a...

From Pontiac engineer Malcolm "Mac" McKellar a driving force behind Pontiac camshaft design....

The 041 was often touted in vintage Pontiac sales literature as the division's first...
Forum: Pontiac - Street 02-01-2024, 02:39 PM
Replies: 57
Views: 2,819
Posted By Steve C.
And if interested in Harold's original UltraDyne...

And if interested in Harold's original UltraDyne lobes they can be ground at Bullet Racing Cams.
Ask for Tim Goolsby at ext 102, he worked with Harold for 21 years at UltraDyne.
...
Forum: Pontiac - Street 02-01-2024, 11:32 AM
Replies: 57
Views: 2,819
Posted By Steve C.
"Every cam I design is designed the same way,...

"Every cam I design is designed the same way, unsymmetrical, with a delayed, fast-opening, and a delayed, gentler closing side.
When I open the exhaust valve fast, it produces an intense sonic...
Forum: Pontiac - Race 01-29-2024, 12:14 PM
Replies: 25
Views: 2,768
Posted By Steve C.
Are we sticking to a cam with 230 degrees intake...

Are we sticking to a cam with 230 degrees intake duration for the list ?

As noted Jim Hand used the WG 5059 at one time, it had 234 degrees intake duration.

Sort of related, here is a...
Forum: Pontiac - Street 01-29-2024, 11:56 AM
Replies: 64
Views: 2,745
Posted By Steve C.
And another subject that relates to the type of...

And another subject that relates to the type of Edelbrock cylinder head. The older style combustion chambers or the heart shape.

How combustion chamber design relates to engine performance
...
Showing results 1 to 25 of 389

 
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