Drag Racing Discussions > Six Cylinder Drag Vehicles

New 6 cylinder Motor Idea For My SDRA Dragster

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tylercrawford:

--- Quote from: old28 on September 21, 2013, 07:48:15 PM ---
I am looking at a Chevy 250 block pour filled to within 1" of the deck, Bored .125 to 4.00 for 327 forged FT pistons, O deck the block, CR about 11.50-11.75, Clay Smith cam about .550/.550, Small chamber 62cc head with sbc 1.87/1.60 valves, After market 4bl intake with a 600 cfm carb. Will run water in 1" of the block and all of the head. This setup will make 266" and I hope 270-280 HP.

--- End quote ---

The single 4bbl is the only part that doesn't sound that great to me.  I think it looks more the part with a multi-carb setup.

old28:

tylercrawford -- I agree with you that it looks right with the multi carbs and I am able to run

two (2x4) adapters on the intake I am currently running (not in pictures) so I could run four Holley 94

carbs. They make about 155cfm each for a total of 620cfm and this motor will need all of that plus

some.

Hoss:
We have a pretty good class of SDRA cars that run here at Tulsa.
They need to change to slicks. They run a index so tires really do not matter.
The street tires really screw the track so they always have to run last.

Hoss

Dolmetsch:
Sometimes inadvertantly rules get in the way of fun. A good crew will suck it up and make the change . BTW OLD28 I have been now turfed from the hokey grp so email or PM me here. I cannot even retrieve my PMs there. I wonder what I did? Frankly Scarlet.....................
Don

old28:
Dolmetsch -- Have you ever bored a Gen-3 250 L6 to 4" (with or without block file)?

The main reason, it easy to find 327" forged pistons with a solid .125 dome that milled down to .040" will provide 11.5 CR with my block -0- decked and head milled .060". I an unable to find 307 piston in cast or forged with a .125" dome and FT 307" piston yield only 10.6 CR.

You know me, I've got to be different. Most other would drop a chevy 292, GMC 302 or a Ford 300 in and go have some fun.

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