305 heads with 1.94 valves on a semi stock 350?
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: May 2007
Posts: 1
305 heads with 1.94 valves on a semi stock 350?
i bought this amazing 84 gmc pickup for $100. www.cardomain.com. it had a worn out 305 in it, and i am in the middle of an engine swap for a 350. i have bought 2 sets of 350 heads and neither one was what they were supposed to be. i have a set of 1.94 valve 305 heads with open chambers, and i was wondering if this would surfice until i had the money to buy a good set of 350 heads? the specs of the engine are: stock crank turned .10 on main and rod.. 495 lift comp cam with 295 duration intake/exhaust. new lifters and springs to match cam. new stock bore summit pistons with new rings. and a built quadrajet 4 barrel. this is just for the street. will this work for time being? and what kind of power should i expect in the meantime?
#3
Member
MASTER JOURNEYMAN
Join Date: Nov 2007
Location: annapolis md
Posts: 43
good luck i had probs with detonation others have had better luck,with such a small comb chamber 50-58cc? it raises compression almost too much for stock parts ,plenty of 882 castings w/194 out there and used aftermarket heads arent hard to find.
#4
Senior Member
RACING JUNKIE
Join Date: Sep 2007
Posts: 4,137
Originally Posted by twobad1
good luck i had probs with detonation others have had better luck,with such a small comb chamber 50-58cc? it raises compression almost too much for stock parts ,plenty of 882 castings w/194 out there and used aftermarket heads arent hard to find.
#5
Member
MASTER JOURNEYMAN
Join Date: Nov 2007
Location: annapolis md
Posts: 43
like JS said he may be ok on street.w/low timing & the right cam it could make a respectable 300plus hp,Q-jet!? if thats all the budget allows go for it! just keep it cool!! thats what killed mine
#6
Junior Member
APPRENTICE
Join Date: Feb 2009
Posts: 21
The Chevy performance page has a HP buildup on a very similar setup to your engine. With stock Chev heads no less.
http://www.chevyhiperformance.com/te...ild/index.html
http://www.chevyhiperformance.com/te...ild/index.html