Originally posted by NC3x58: Alright Shabs, I keep seeing people talk about square port vs oval port for alcohol on BBC's.. What head would you chose if building a 615-632 to run alky in a 1950lb dragster, wanting to run 4.50's in 2500' of air at 1100' elevation?
To me, I would think this is where the Brodix Headhunter 383 or something like the Profiler 375 shine.. But is something like the BB3 380 Rec. port a better option?
In my opinion, Alcohol is for Boosted Applications, Sprint Cars, and Footbrake cars... however, if you really want to run something that big on alcohol go to MC Head Hunters, and as high of compression as you can get. You're trying to light a match (the plug) in a Hurricane and that's not very easy to do.
Once you cross over the 582" mark, making something run well on alcohol takes a lot more attention to detail and preparation.
To answer your question, go with the bigger head and larger plenum volume. You're gonna need 'em both.
Out of the box 383 Headhunters VS Profilers you won’t see any ET Difference. You better have the right came with a lot of Exhaust duration if running the Headhunters on alcohol or you’ll have a miss
Posts: 235 | Location: Tennessee | Registered: December 18, 2006
Have you seen or worked with a set of the Shafiroff Brodix X20 cylinder heads? I saw a video of them on Facebook but was curious if anyone else has some experience with them.
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Posts: 5334 | Location: stuck in the middle with you! | Registered: March 11, 2002
Have you seen or worked with a set of the Shafiroff Brodix X20 cylinder heads? I saw a video of them on Facebook but was curious if anyone else has some experience with them.
It's a BRX head from what I can tell. If it takes the same manifold, same rockers, same pistons, same valves... it's the same head.
Yessir, any experience? Works well? I would like to keep my same valve covers and these are supposed to use a stock BBC bolt pattern valve cover. I know that sounds dumb but I really like my valve covers and thought about doing a 615 with those heads? Any known issues I should be aware of?
Clowns to the left of me, Jokers to the right. Here I am.......
Posts: 5334 | Location: stuck in the middle with you! | Registered: March 11, 2002
It's a BRX head. That's it. Van Arnold is going 178 mph in S/G with a set we ported using stainless valves so once you can widdle a good shape in it with a nice valve job they'll absolutely scream.
Have you seen or worked with a set of the Shafiroff Brodix X20 cylinder heads? I saw a video of them on Facebook but was curious if anyone else has some experience with them.
That head has fallen off the face of the planet! It's not on any of their recent adds! They put that out there many many moons ago. It was advertised with larger intake valve. I'd say based on there being very very few out there it had issues. As for the valve covers, one bolt is moved about 3/8" on top on the Dart & Bordix 20 degree heads. You can't used the stock valve covers, they moved that bolt due to rocker clearance needed. Maybe you could modify yours????
I thought about that, modifying my valve covers. My engine builder teases me about my valve covers. He says I’d pick up a tenth if I got those 400 pound covers off of it. LOL
His theory is if you’re gonna spend a bunch of money anyway you might as well put spreadport heads on to begin with.
Clowns to the left of me, Jokers to the right. Here I am.......
Posts: 5334 | Location: stuck in the middle with you! | Registered: March 11, 2002
Vern did you say you are selecting a new head based on need to fit existing valve covers? If so post a picture of them. My billet rail weld up aluminums I ran was approaching that. Had the oil fill bung and vac pump and vac sensor bungs placed right. I even polished them now and then. lol
2005 2000lb 4 link dragster home brew 582 BBC Dart 355 1.058 2.98 4.629@149 6.094 7.310@185
Posts: 12175 | Location: 33463 | Registered: February 04, 2004
https://postimg.cc/gallery/np3zpruo/ "Dunning-Kruger Effect" -a type of Cognitive bias where people with little expertise or ability assume they have superior expertise or ability. This overestimation occurs as a result of the fact that they do not have enough knowledge to know they don't have enough knowledge.
Before you argue with someone ask yourself, "Is this person mentally mature enough to grasp the concept of a different perspective?" If not there is no point to argue.
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Posts: 4282 | Location: United States of Texas | Registered: April 02, 2011
All this talk about large blocks how about some poor boy combos, like what you like for a standard 23* for 383" mild camshaft, 13:1, alcohol, and same thing for a 406"?
Most important, keep the shiny side up
Posts: 798 | Location: Punxsutawney, Pa USA | Registered: February 05, 2001
Originally posted by Steve from Pa: All this talk about large blocks how about some poor boy combos, like what you like for a standard 23* for 383" mild camshaft, 13:1, alcohol, and same thing for a 406"?
Here's another one for you then Shabs... How about a 6.0LS stroked to 402-418.. Somewhere in that range.. This would be what you say is a footbrake car, some kind of backhalf car, probably still pretty heavy with full interior.. 600+ hp, on alcohol. Footbrake/transbrake (Likely more transbrake than footbrake around us). Whatcha got?
Nick Craig
1971 Camaro Split Bumper 376ci LS3
Posts: 410 | Location: Ohio | Registered: December 28, 2013
