307 Stroker Anyone??? - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pontiacvince · 05-28-2025, 04:46 PM

Quote:

Originally Posted by HO455

It's always good to have spare rods!

Glad to hear you have the things sorted out.
On a different subject, are you going to Tigers on the Columbia this year? I haven’t decided yet. I've got lots to do around the house but it would be nice to take a couple days off.

When is Tigers on the Columbia??? I'm currently rebuilding the engine and trans out of my '71 Grand Prix....engine is in the machine shop, trans at a rebuilder. hope to have it on the road by end of Summer.

pontiacvince · 05-28-2025, 04:49 PM

Quote:

Originally Posted by MikeB

Sounds like what GM should have done from the beginning. Never did like the idea of adjacent cylinders firing one after the other.

However, I can just imagine a future owner troubleshooting some kind of problem, then finding the #4 and #7 plug wires reversed and thinking, "Hey, I found the problem!" Not.

There will ALWAYS be a pair of adjacent cylinders firing sequentially. Moving the 4 - 7 cylinders shifts the adjacent cylinders to the 2 - 4 cylinders.

**MikeB** · 05-29-2025, 11:17 AM

Quote:

Originally Posted by pontiacvince

There will ALWAYS be a pair of adjacent cylinders firing sequentially. Moving the 4 - 7 cylinders shifts the adjacent cylinders to the 2 - 4 cylinders.

Silly me! For some reason I thought the idea was to not have adjacent cylinders firing one after the other.

HO455 · 05-30-2025, 04:34 PM

The idea comes from the stock class racing world. The idea was to change how the intake feeds air into the cylinders. Folks studied how some intake manifold tracts supplied two cylinders that fired one after the other not giving that intake tract time to completely refill before it needed to fill the second cylinder. By regrinding the cam that allowed the consecutively firing cylinders to be fed by intake tracts that come from different levels in a dual plane manifold. Thus the second cylinder's intake tract was fully filled when the cylinder's intake valve opened. The cam modification does nothing without the proper intake manifold. When your hunting for hundreds of a second in the quarter mile this things help

And pontiacvince the Tigers on the Columbia event was last weekend. It's usually every Memorial day weekend.

05-30-2025, 04:34 PM	#29
HO455 Registered User Join Date: Feb 2016 Location: Portland Oregon Posts: 12,405	Re: 307 Stroker Anyone??? The idea comes from the stock class racing world. The idea was to change how the intake feeds air into the cylinders. Folks studied how some intake manifold tracts supplied two cylinders that fired one after the other not giving that intake tract time to completely refill before it needed to fill the second cylinder. By regrinding the cam that allowed the consecutively firing cylinders to be fed by intake tracts that come from different levels in a dual plane manifold. Thus the second cylinder's intake tract was fully filled when the cylinder's intake valve opened. The cam modification does nothing without the proper intake manifold. When your hunting for hundreds of a second in the quarter mile this things help And pontiacvince the Tigers on the Columbia event was last weekend. It's usually every Memorial day weekend. __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377



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