need some gitty up

dan58

1972 or 73? 360 with Edelbrock RV cam, Edelbrock performer intake, and Edelbrock shorty headers. Running propane (110 octane!) I'm assuming it should be in the 250hp range, correct? It needs some more gitty up. I'd be happy with another 75-100 horses. What kind of $ are we talking about to get there? I'm assuming we can run up to 11:1 compression, but is it going to be a bear to cool for offroad racing? The heads have recently been gone through with new valve seals and a slight shave.

mnsherick

First let me preface what I'm about to say by telling you that I am in no way an expert on this type of build. But since you haven't seen any other answers, my first suggestion would be to look into CNC ported Aluminum heads, and also a cam with a bit more beef in the lift department. Not sure how this would affect you on HP but you want to get 75-100HP and it's not like you can just drop xx$ into it and it will perform and operate correctly. Your talking about a 40% or higher HP percentage. Also you didn't mention anything about tork, is this build for rock crawling or drag racing, RPMs and torque peaks will need to all align perfectly for you to achieve what your end goal is. Just some thoughts. In the mean time keep searching the forums and look for more custom builds that are similar to yours to get an idea and what parts will have different affects. -Matt

dan58

I'm rock racing, which is a strange bird in itself. It's rock crawling, but the instant acceleration is what I need. Call it short drag races to the turn, then another short drag race. Then go rock crawl. It's really hard to build something that works well for that scenario. This is something I'd consider for a winter build, where the motor can come out and hit a machine shop. I'm facing the usual GM Gen III/IV suspects. Tremendous power, quick acceleration. The aluminum 5.3 is the hot ticket.

tarior

Boost it! DC is pretty close to W. Virginia. Look up Barry Allen.

Henry Lavrenz

I agree, go turbo or even twin turbo because it sounds cool.

tarior

Vortec blower! :lo1l:

Henry Lavrenz

Ya, and take it from someone that knows, a blower is easier than turbocharging. Hankrod really it is all in the correct pistons and piston to head relationship, next is the right cam for your use, and last is the carb, manifold, exhaust, ignition and so on. you can make alot of power with a set of cleaned up factory heads, I would cut them down to close up the chamber as much as possible.

tarior

AFAIK, that Edelcock performer cam ain't very big. If boost isn't in your future, maybe you should take a look at some of the Lunati Voodoo cam grinds. Prolly pick up some oomph there without getting ridiculous.

tufcj

http://www.dyersblowers.com/1694.html :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l: :lo1l:

Bob
tufcj

tarior

OK seriously. Do you know how much compression you have right now?
If it's a totally stock bottom end I'd go with this camshaft http://www.lunatipower.com/Product.aspx?id=1482&gid=287

And put an Airgap or a Torker on it. And run it on gas instead of propane. Those things should give a noticeable increase in GO.
I just hate to see a guy go Chevy. If you did that, how would your rig be any different than every other one out there?