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Author Topic:   How would you build for these rules?
HRT187
Member
posted May 27, 2003 03:46 AM
ENGINE

Steel Block V-8 360 Cubic inch maximum. (Stock Stroke for block used)

Piston - Any flat top piston (may cut valve relief).

Block - Pistons may not extend out of cylinder. May be bored.

Cranks - Cast or steel production type only. Balancing permitted. (Stock stroke for block used +/- .020 inch.)

Cams - Any flat or hydraulic tappet. (Stock diameter lifters)

Heads - Cast iron production or Dart S/R Head. No angle plug heads. Other than Chevrolet, see official. 64 cc minimum. Needle bearing and roller tip rocker arms allowed. Only one (1) head gasket per side. Heads must remain stock in every way. No aluminum heads. Piston, rod, wrist pin, rings, rod bolts & nuts, rod bearing minimum weight 1400 grams +/- (10) ten grams and add (6) six grams per .010 inch overbore. Three (3) angle cut on valve seats permitted. The third angle cannot exceed inch below valve seat. Stud girdles permitted.

Max Valve Size - Intake 1.940 Exhaust 1.500

This with MSD ignition and a box stock 350cfm holley 7448 Thats a gas carb, but it doesn't neccessarily say you can't run alky... advantage? Maybe in Alabama where this track is.

[This message has been edited by HRT187 (edited May 27, 2003).]

rico 08
Member
posted May 27, 2003 12:08 PM
I'd run vortec heads and get a custom grind cam for the restrictive two barrell rule.


HRT187
Member
posted May 27, 2003 02:32 PM
I was thinking the Dart SRs with a HiTech Torklink Manifold (they adverstise in the back of Circle Track) and the matching cam for the puny carburetor.

What about engine guts?

Sidebite252
Member
posted May 27, 2003 04:07 PM
350 bored 30 over will give you a 355 ci. I agree the vortec heads would flow nice but with a flat top pistion you'll lose out on compression. A 461, 462, or 491 double hump head would serve better on the compression (64cc). A simple pocket port on the humpy heads would be great if it's allowed. Methanol is always a plus as far as HP & engine temp but burns twice as much as gas but I don't think you'll get away with running alky with a gas carb. With that 2 bbl carb rule you might want to stay below a .500 lift cam with an @ .50 duration between 240 & 250 deg. Also, a costom grind cam for this motor may be the way to go (consult the cam manufacturers.) The only plus to running a hydraulic cam is less maintenance - you'll need to check lash often with the solid cam. I wouldn't bother with the stud girdles unless you run a monster cam - spend that money elsewhere.


HRT187
Member
posted May 27, 2003 09:14 PM
I still don't see where a 461 or a vortec is a good move? Aren't S/Rs already cut for the right springs and stuff. Seems like too much work to make a good set of camelbacks for the job.

This is going in a 2500lbs asphalt mod, I dunno what kinda work I'll have to do to make a strong engine outta this. I guess as much compression as I can get with a 64cc head.

Sidebite252
Member
posted May 28, 2003 05:46 PM
We have one of our motors with a stock diameter spring and run over a .500 lift so that shouldn't be an issue. There are a lot of stock diameter springs that may serve your purpose. If you desire a ***** in rocker arm bolt that mod is pretty simple to do or not too expensive to have a machine shop to do as well. I was just thinking along the lines of the 2 bbl carb rule. No doubt the aftermarket heads are also a good choice but we've found that we can build a set of humpys cheeper than aftermarket heads.
Good luck with your project.


HRT187
Member
posted May 28, 2003 05:52 PM
I hear ya, I just worry about stock diameter springs... never had much luck with them. I think I'm gonna scrap the whole 2barrel thing, and go back to running Dirt on Fridays. Been wanting to build a new overslung car anyhow.

thanks fer the suggestions fellas.

towmandan
Member
posted May 29, 2003 01:34 PM
GO DIRT.....Towman


HRT187
Member
posted May 29, 2003 05:41 PM
Not opposed to it, I just dunno if I'd be on my game on clay anymore.


o5racer
Member
posted May 30, 2003 07:13 PM
The vortecs and cammelbacks are both 64CCs. The main difference as far as chamber size is concerned is the cammelback is a heavier casting and will tolerate a deeper angle mill that a vortec. but from what i hae heard a stock vortec will out flow a cammelback or a bowtie with the same size valves. plus they are very affordable.


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