Saturday Night Racer - 305 gm heads

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305 gm heads (Read 2987 times)

hobby26b LMR Member Offline Dirt Late Models Rule! Posts: 189	305 gm heads 08/17/09 at 8:26pm Has anyone ever tried to run 305 cylinder heads on a 350 hobby motor.Or on any motor,how did it run?
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Andrew

LMR God

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2006 SMS M.S.
champion... more of
a PB these days

Posts: 1359
Camarillo

Re: 305 gm heads
Reply #1 - 08/17/09 at 9:26pm

I had 305 heads on my mod when I bought it. I ran the whole first year with them. It ran great... on methanol no less. For the second year a buddy twisted my arm and I put his world products heads on. It did wake the car up. I would think for a hobby 305 heads would work fine, especially if you're on a budget, but I'm not a hobby driver either.

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32MORGAN LMR God Offline 2007/2008 SMS SUPERFACTORYSTOCK CHAMPION Posts: 720 SANTA MARIA CA.	Re: 305 gm heads Reply #2 - 08/17/09 at 9:50pm 305's are 58 cc and that's pretty small when you have a 180 hot cranking comp rule and the hobbys have a flat top piston rule. even with custom cam grinds, i don't think you could bleed off the extra compression and that would kill power with the 4412. jmo
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01M LMR Senior Offline DOIN' IT! Posts: 367 ATWATER, CA	Re: 305 gm heads Reply #3 - 08/17/09 at 11:40pm i had 305 58cc heads on my 350 0.40 over with flat top 4 valve relief pistons . only mods on the heads were screw in studs and guide plates. it had 210lbs. of compression and was a rocket. with a 4412
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