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Author Topic:   Looking for some Advice please
RC Racing
Dirt Maniac

Total posts: 144
posted January 17, 2003 11:49 AM
Posted this before, didn't get any replies, so trying again ...I did a search in this Forum's archives & didn't see my answer. Maybe I missed something.

Looking for guidance for piston and intake manifold choice. Also, is there a web site that list casting # for intakes?

I'm building a motor for claimer class in SE TX known as "Limited Modified". Engine rule(in part):
360 cubic inch max. Zero deck height. 10:1 four valve relief silverlite cast pistons only. Open chamber cylinder heads 76' or later. 450 max lift hydraulic cam. 1.5 long slot steel rocker arms. No roller tips. No bronze bushings in lifter bore or custom lifters (stock type hydraulic lifters only). ***** in studs and guide plates allowed. 120lb stock dia springs max, stainless valves 1.94 intake & 1.50 exhaust. No angle mill. Steel timing chain. Stock crank and rods. No 6" rods in GM motors. A.R.P Rod, crank and head bolts and studs are allowed. Claimer oil pan & maximum fluid damper allowed. Cast iron water pumps only. Cast iron intakes 76" or later only.

Appreciate the assistance

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KPLugnut
Dirt Freak

Total posts: 408
posted January 17, 2003 11:59 AM
The rules seem to specify exactly what you can run....Silvolite cast 4-relief pistons. So there's basically your only choice for pistons, unless you don't want to follow what the rules say, or the tech won't really enforce that.
As for intakes, it also says "'76 or later only". So find a cast iron quadrajet intake manifold that does not have an EGR valve setup on it and use that, I would guess. The intake #'s might be on www.mortec.com but I'm not sure.

Hope that helps,
KPLugnut

RC Racing
Dirt Maniac

Total posts: 144
posted January 17, 2003 12:10 PM
Thanks for the reply KP. You've assisted me in the past and have once again. Thanks

And you must excuse my ignorance. Wasn't aware that Silvolite (silverlite?) was a brand.

Will check mortec on intake #s

PS Can I send this NE type cold weather we're experiencing your way? Y'all are a little more acclimated to it.

RC Racing
Dirt Maniac

Total posts: 144
posted January 19, 2003 02:06 PM
To Mr. Dayton Umholtz, or anyone else that maybe able to contribute.

Went back and looked at 3 tracks & a couple of sanctions in the area that are running this class. In particluar, looked at the engine rules. The majority said "four valve relief cast pistons only". Only 1 track specified "silvolite", so I believe it was a type on their part (I will confirm).

So if does turn uut that the rule is simply "4-valve relief cast", any advice as to which piston would probably be my best choice for this claimer class?

Appreciate the assistance y'all

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Bob0092
Dirt Roller

Total posts: 16
posted January 19, 2003 04:44 PM
i would put them speed pro pistons in it, there a better piston than kb silverlite (my opinion),with a gm steel crank and gm 5.94 rods good combo,(both stock in 350's and the rods fall under 6inchs), have a friend running it, but with a 500 lift cam by rules motor runs good. just my 2 cents

RC Racing
Dirt Maniac

Total posts: 144
posted January 23, 2003 12:24 PM
Folks, any additional or discerning comments and/or advice?

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