Circle track engine advice

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go straight turn left.

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Mash Throttle, spin tires, turn left, go straight Let off before turn, straighten wheels and go around the corner do it again and again HEE HAWW Lots of fun, if you can do it

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Hello all,

I am considering building a car for the local circle tracks "Thunder Stock" class. The track is a paved 1/4 mile high banked oval, the fastest in the world they say. This class is completely filled with Chebbies, mostly Monte Carlos. Last week the fast qualifiers lap time was 13.469 seconds. I have copied and pasted the engine rules below. What do you guys think a engine good combo would be based on them? Could I build a 360 that would keep up? I know I need a properly set up car, we have another forum for that:)

10. ENGINE: Stock cast iron block, stock cast cyl heads and stock cast iron intake manifold are required. All engine parts must remain in their original “as cast” configuration. ANY modifications are illegal. Maximum displacement for Ford and Chevrolet engines is 360 cubic inches and 366 cubic inches for Mopar. Ford engines must be 351 Windsor block and cyl heads. Carburetor must be as installed by the manufacturer on the baseline model for said manufacturer (One 4bbl max, no aftermarket carbs) factory snorkel type air cleaner or 14" X 4" after market air cleaner with solid steel top and bottom. NO flow control designs and NO high flow elements will be allowed. Engine must be in stock location. Stock steel or rubber mounts are ok. One engine movement limiter is allowed (cable, chain or rod) HEADS: No aftermarket, bowtie, vortec/ swirl port or SB chevy angle plug heads are allowed. Valve lift is limited to .420 on SB chev and .450 on Ford or Mopar engines. Rocker arms must retain stock ratio (1.5 on SB chev ) NO aftermarket or roller type rocker arms are allowed. Engine compression is limited to 150 lbs ( 5 revolutions ) ZERO tolerance. OEM replacement pistons are allowed, symmetrical with 4 reliefs or dished with 5/64 - 5/64 - 3/16-ring sizes. Crankshaft must match block and model/year of car (weight/measurements). Crank will be teched. Powder coated connecting rods are not allowed.

11. Exhaust: Complete leak free, tight exhaust system with a maximum diameter of 2.25" OD must be run from the engine to an area behind the driver and must incorporate (1 or 2 depending on system) approved mufflers. No “H” pipes. Stock “Y” pipe allowed, no other 2 into 1 systems. NO center dump exhaust manifolds. Approved mufflers ONLY. 88-Decibel Limit.
(Mufflers that can be used: Napa 17713 or 17714. Dynomax and walker 17731 or 17732).


Thanks for any replies!!

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I see you say that most of the cars are Chevs/Monte Carlos/etc... Do the rules state that you have to run the same frame as manutacturer/motor? I am not familiar with the name "thunder stock', but around here, the class has been called 'street stock' and some other names over the years. Locally, EVERYBODY runs the Chevelle, Monte Carlo, Cutlass frames,,AKA 'metric frames'. Most people run the Chev motors of course, but, I have built some Mopar engines for the same class and they ran the 'metric' frames. All tracks have different rules. I don't know about your area, but, here, the 'street stock' class is/was a tough row to hoe. You notice I said "is/was", as it has pretty well been done away with due to lack of cars. That is due to a few cars dominating the class and discouraging any new people to get involved. I can take some responsibility for that, as one customer of mine pretty well dominated the class for several years around here. Sorry,, it wasn't a Mopar, but I did co-own one for awhile that did run at the front with a Mopar motor. I helped run 'late models' in the '70's and the 'street stocks' today are better cars than the 'late models' were back then. If you can run the GM chassis, I would say you have a chance. If you have to run the Mopar chassis, you have alot of work ahead.

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Quote:

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go straight turn left.

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Mash Throttle, spin tires, turn left, go straight Let off before turn, straighten wheels and go around the corner do it again and again HEE HAWW Lots of fun, if you can do it

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I used to be fearless and this would not be a problem to try and do. But I am getting old now and things hurt more than they did 20 years ago!!

I started a thread in the cornering forum asking for suspension advice. I posted the suspension rules there.

Thanks guys!!!