Paul Knippen's Muscle Motors

10/09/2026

10/06/2026

Something cool is coming up! 🤠

Astute observers will notice one cylinder is missing valvetrain parts and the Fram Filter box..... Things that make you go hmmmm 🤔





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10/02/2026

Whole lot of Bad A*z going on here ..... IYKYK

But I ain't kidding.... A whole lot 🤠

09/29/2026

Performing a heat cycle on the new engine in the 70 😎

09/26/2026

Working on a new CNC Edelbrock Wide-port program. These will have options on valve size and chambers but need to be based on a 72cc casting. They will also have the same 1,000 plus horsepower guarantee that our previous wide-ports had. These are the next level from our 360+ CFM standard pushrod location heads. They will require offset shaft rockers and titanium intake valves are recommended.

Intake port flow @ 28"
100 70
200 146
300 219
400 288
500 338
600 374
700 395
800 401
900 408

EHTTFMF's

09/17/2026

I tuned up a pair of round port manifolds. Curious if anyone has extensively ported exhaust manifolds, their process, flow numbers and performance or power improvements. If they were flow bench tested & what the procedure was, flowed port by itself or attached to a head.

I tested four different sets of manifolds flowing each individual port attached to a relatively healthy exhaust port. They were tested at .500 & .700 lift. The goal was to make each port flow better than the best of the four, which was accomplished for seven of the eight ports.

08/22/2026

UPS guy is gonna have a busy Monday. From left to right and center..... 360+CFM, 360+CFM, 360+CFM

This link will give more details on these heads. Flow numbers, chamber options and detailed pictures.

https://www.facebook.com/share/p/19HUMviua6/

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08/13/2026

Pontiac Power Tip 010

You need to remove about five lbs. of material to port a Victor that will support more than 1000 HP naturally aspirated without welding.... Or about 100hp/lbs 😂

😎

08/08/2026

Poor man's SD-455, part 3.

The camshaft break-in process was successful. For this build, we utilized a 7041270 carburetor, which is the highest-flowing factory Quadrajet. Its enhanced airflow comes from a redesigned primary booster and the elimination of the booster ring. These carburetors lose a slight bit of throttle response at lower RPMs, this is typically mitigated in a well-built 455 engine, especially when paired with standard street tires. The increase in upper RPM power makes it a worthwhile trade. This engine produces sufficient vacuum to operate all components, contradicting the notion that tight lobe separation camshafts are unsuitable for street Pontiacs, as some "experts" claim. You can't hear it but the valve train operates with zero noise, it's as quiet as dad's brand new 428 HO Grand Prix he had back in the day.

Links to Part 2 and Part 1 are provided:

https://www.facebook.com/share/p/19jWpm1A2V,

https://www.facebook.com/share/p/17rtTJYuT8/

07/31/2026

Pontiac Power Tip #009

Great way to store your block, keep it easily moveable and convenient to keep oiled with your favorite rust preventative.