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Re: BBC heads
Originally Posted by tcarda
Originally Posted by Tod74
I have posted about head recomendation before..but I am getting ready to purchase something...but I still don't know which ones to get. I have it narrowed to either -2x brodix with 340 cc intake ports or the AFR but can't decide between 325 and the 345. Motor is a 13.1 540 with a solid roller .726 int .737 exh dur at 50 around 274 int 284 exh ..can't remember exactly don't have card with me...but the question is "What size intake ports would be best for a 540 ci 7000 rpm max? " The prices are the same for 325 or 345. They sell a cnc ported 335 also and a 357 for much more money. I want to get the right ones but don't want to go too big. Again this is a 7000 rpm motor. Car is 3050 lb 1/8 mile bracket car with powerglide with brake. 5.14 gears and 32 x 14 tires. 5500 converter
My main question isn't really which BRAND of head or what head in particular...as I know that opinions will vary greatly on that. What I really wanted to know was "How much head in terms of intake port volume would a 540 such as this need if the RPMS were kept at 7000 ? " I obviously don't want to buy too small, but at the same time it doesn't make much sense to put a head on it big enough to pull to 8000 rpm when I know I won't twist it that tight. |
I am understanding that now Curtis has a smaller version of his Edlebrock24 deg for engines that are a little smaller than the original application was for. If he hs it developed yet that will surely be the best bang for the book.
www.raceflowdevelopment.com Ed |
Originally Posted by edvancedengines
I am understanding that now Curtis has a smaller version of his Edlebrock24 deg for engines that are a little smaller than the original application was for. If he hs it developed yet that will surely be the best bang for the book.
www.raceflowdevelopment.com Ed All 3 are designed around 4.53" or larger bores, .. . but have three different port cross sections, .. smaller is a 366cc head with a 2.3" intake and flows and honest 435, .. the first one 380cc and flows 460, .. and a new one still under development 390 cc, 480 cfm, .. Don't put too much into the port cc number, .. these are very fast airspeed ports with large valve bowls. The Victor Jr CnC designed for 4.28" stock style bore blocks is on hold until some design issues are fixed with that casting. Curtis |
Originally Posted by cboggs
Originally Posted by edvancedengines
I am understanding that now Curtis has a smaller version of his Edlebrock24 deg for engines that are a little smaller than the original application was for. If he hs it developed yet that will surely be the best bang for the book.
www.raceflowdevelopment.com Ed All 3 are designed around 4.53" or larger bores, .. . but have three different port cross sections, .. smaller is a 366cc head with a 2.3" intake and flows and honest 435, .. the first one 380cc and flows 460, .. and a new one still under development 390 cc, 480 cfm, .. Don't put too much into the port cc number, .. these are very fast airspeed ports with large valve bowls. The Victor Jr CnC designed for 4.28" stock style bore blocks is on hold until some design issues are fixed with that casting. Curtis |
The Brodix 2x 340 is one of my favorite castings to port, ..
it's a 26* head but still works very well, .. Get the chamber cnc option, .. or have them professionaly ported. C |
for cboggs, i know i'm jumping on someone else's questions, but have you had a chance to do or flow the dart cnc 380's rect port? any good or bad?
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Originally Posted by deepockets
for cboggs, i know i'm jumping on someone else's questions, but have you had a chance to do or flow the dart cnc 380's rect port? any good or bad?
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Thanks for all the advice guys. I bought the Brodix -2x's.
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Originally Posted by Tod74
Thanks for all the advice guys. I bought the Brodix -2x's.
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Originally Posted by bjuice
Originally Posted by Tod74
Thanks for all the advice guys. I bought the Brodix -2x's.
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