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Author Topic:   Which SBC Combo?
Dirt Full Roller

Total posts: 43
posted August 15, 2005 04:10 PM  
I am going to build a new Circle Track Small Block Chevy over the winter for the 2006 season and needed some advice on which of the combonations would you build if you had the choice?

The Cubic Inch Limit is 362.What combo would dominate the other in your opinion?

Will be running on a 1/4 mile dirt oval.

Idea #1.400 Block bored to 4.155 + 30 with a 3.25 Forged Steel Crank With 6.250 3D Eagle Rods with JE Forged Flat Top Pistons.Vortech large port heads with 2.00 Int and 1.55 Exh stainless steel swirl polished valves-screw in studs and guide plates.Lunati Solid Cam.Aluminum Intake and a Holley 750 Double Pumper mechanical secondaries.Headers ect...This combo will yeild 352.537 Cubic Inches.

Or should I build? a 350 block 3.48 stroke forged steel crank bored 30 over with 6.00 inch rods 3D Eagle and JE Forged flat tops with the same heads ect....?...This combo will yeild 355 Cubic Inches.

I was told my first choice would be an RPM Motor and would smoke my second choice quickly.

Thanks Steven.

Dirt Forum Champ
Total posts: 635
posted August 15, 2005 08:03 PM  
I'd run the longest stroke possible if there's traction to be had. The 353 using a 400 block would be a high winding engine better suited for a longer track, less traction and lots of revs. A 'normal' 355 would make a little more torque at lower revs all else being equal.

Can you angle mill the heads? Get the heads down to 55-56 cc and zero deck the block for as much compression as possible.

[This message has been edited by Raz_900 (edited August 15, 2005).]

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