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Author Topic:   hobby stock engine
moedemarcus
Dirt Roller

Total posts: 22
posted January 08, 2003 06:42 PM
Hello, I would like some help on what to put in a imca hobby stock engine to make it the best possibly with the rules.
Rules are It must be 9:1 commpression, maximum 361 cubic inches, flat top pistons. Any suggestions will help

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 08, 2003 07:01 PM
how are they checking compression ratio? are they just looking for flat tops?

if it's a chevrolet......400 block, 327 crank, 6.125" rods, flat top pistons.

if it's a ford......302 block, 3.40 stroker crank, 5.4" rods, flat top pistons. this is going to be about 75 lbs. lighter than a small block chevy. my opinion......

racer17j
Dirt Forum Champ
Total posts: 1565
posted January 08, 2003 09:39 PM UIN: 54865418
with imca they are pretty picky and do have all the tools to check it right. you are not alowed to stroke an imca engine crank must match. the best way to make power in one is with 6 in rods and you can get a set of hyperutectric pistons pretty cheap to keep it sensable for the claim rule,good flowing heads a good cam and most important of all in my opinion is the rochester big carb it makes a world of difference

moedemarcus
Dirt Roller

Total posts: 22
posted January 10, 2003 03:19 PM
Yes i relize that, Just wonder what parts or what to do the best according to the imca hobby stock rules, like what kind of pistons?cam?valve springs, rods? etc that will still keep it 9:1 and legal, can anyone help

racer17j
Dirt Forum Champ
Total posts: 1565
posted January 10, 2003 09:26 PM UIN: 54865418
realy just depends on how much you can aford to lose when you get claimed lol this year i got a set of speed pro hyperutetric pistons gonna use all stock reconditioned rods and crank buying heads with the 202/16 valves in it and z-28 springs, cam that kinda depends on the track and your set up thats one of those deals that works here but not there

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