4x4high....your recomendations?
I think there are a set of those at the Machine shop, Weird valve design Correct? Where the intake valves are more straight?
probably so, the intake valves are on a different plane than the exhaust valves, they resemble a bbc head. 4x4high how come they are so bad on valve guides, but the bbc isn't, when they look so much alike? not doubting you, just curious why the bbc doesn't have the same problem?
i had a mildly built 350 in a 85 or 86 Monte carlo SS that i bought from an insurance company and it had been pretty much stripped. i built a 350 for it w/ fuelie heads(camel humps) and it had a th-350 and a ford 9'' rear w/3.90 gears. i got rid of the ecm and most all electronics. it was a pretty nice ride, after i bought a 2nd totaled Monte carlo SS for the interior and ground effects, and i put a fiberglass cowl induction hood on it, it was a really fun & nice ride. i drove it for about 8 months, in this configuration.
i then swapped the heads for trick flows twisted wedge heads in mid 90's and used their headers(they looked
wicked, like a ball of snakes, not like a typical header) and trick flows intake w/ a 750 vacuum secondary holley and it really woke that car up! it didn't even seem like the same car anymore! i sold it about a month later. to buy a 75 k5 and a 82 k20 that i turned into a trazer b/c the k5 body was gone,. Literally the floor was GONE! i bought the 82 k20 to use its body and axles and the k5 frame and 350/465/205.
i read somewhere that the camel hump heads aren't all the hype says they are, that gm makes better flowing production heads, that the camel humps got their rep b/c they are 64cc heads and people would replace 76cc heads w/ them and get more power due to the bump in compression, so they got the hype of being a really good head while they really aren't and gm makes newer cast heads that are better.
4x4high, what head do you think is the best production head gm has made for carb applications? what casting # should i be looking for to stockpile for carbed engines? i like the 882's as long as they aren't the ones made in Mexico. I’ve never had any trouble out of them. i have 2 sets of 882's on my shelf now for 350sbc and 1 set of 882's that came off a 400sbc, i know they were stock on the 400(everything was standard and had the factory tin head gaskets and the steam holes between the cylinders) so 882's must have been used on 350's and 400's, if gm thought they would flow well enough for a 400, they should flow really good for a 350. i have a buddy that has a factory set of 2.02/1.60 heads on his shelf, but i haven't looked to see what their casting # are yet. I’m trying to talk him out of them. to build an engine that i can run in a stock class mud truck.
the last set of vortecs i bought from gmpp had 2.00/1.55 valves and the exhaust stems were sodium filled, they have 215cc runners, & if iirc they have a 58cc combustion chamber, they are a really good running iron head,(gmpp stated that the vortecs i have will out flow phase 2 bowtie heads, straight out the box) w/gmpp aluminum dual plane intake, w/ a carter afb carb on it, but i can't run it in the stock class, so its going in my 68 c10.
i ask again though, 4x4high, if you were going to look for a certain casting # head for future rebuilds on carbed motors and save them and pull them out of the yards when you find them, which head would it be? what heads would you grab up when you run across a certain set?
i want to find a set of sb2 or sb2.2 heads and intake and put dished pistons in the engine to get it down to a 10-10.5:1 compression ratio and run it on propane, since its a single plane intake and the sb2 or sb2.2's flow better than any other head I’ve ever read the specs on.
For those who don't know about the sb2 or sb2.2 heads, they are aluminum heads that gm engineered to use in NASCAR. Their plan, was to pull production short blocks off the assembly line and bolt the sb2 heads & intake on the production 8.8 or 9.0:1 compression short block and the heads would bump the compression to something like 13-15:1 compression(that’s why i said
use dished pistons to get compression down and use propane on the engine, b/c the sb2's a single plane intake and they flow
like Niagara falls.) they were going to use this as an advertising point, showing that their production short blocks would stand up to the abuse, they got dished out to them on Saturday & Sundays at the races.
