brodix produced oval port 229cc sbc heads

grumpyvette

grumpyvette

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http://www.brodix.com/heads/headhuntersb.html

http://www.brodix.com/heads/topendcombos.html

hhsbintake.jpg


flow
.200 lift -139cfmintake/122cfm exhaust
.300 lift -205cfmintake/166cfm exhaust
.400 lift -257cfmintake/200cfm exhaust
.500 lift -300cfmintake/219cfm exhaust
.600 lift -319cfmintake/227cfm exhaust
.650 lift -322cfmintake/233cfm exhaust
.700 lift -325cfmintake/236cfm exhaust

cost $2800 heads
$390 intake
$170 extra to have the intake ported to match

you could certainly reach well over 600-650 hp with a high compression roller cammed short block, in the 434-440 displacement range if the correct matched components were used, and you might be able to get 700hp if you really push
 
Grumpy,

I was thinking of maybe getting some ported stock LT1 aluminum heads from Advanced Induction or Lloyd Elliot.

Then theses new Brodix oval port heads for Small Block Chevys really caught my eye of late. I was wondering what do you think about using these heads with the matching intake (converted to EFI of course) on a LT1??? I was wondering why haven't the other head manufacturers i.e. AFR, Trickflow and Dart didn't think of offering oval port SBC heads eariler. I know that rectangular ports ultimately flow more but it seems that oval port heads would be great street/strip heads.

I ran into this post on http://www.stevenovasite.com by Chad Speier of Speier Racing Heads that these heads might be better on motors with low piston speed as opposed to a large cubed SBC to which these heads are marketed for.

Brodix! Now they did it!!!!!!!!!!!! (http://www.stevesnovasite.com/forums/sh ... p?t=134036)


I think that maybe since a long rodded SBC(LT1) with a Rod to Stroke Ratio of 1.70 or greater would have more dwell @ TDC and lower piston speeds than most strokers and these heads seem to have great flow numbers like out of the box LSx heads that these might be a good match.

What do think about these heads on a 357 (.040 overbore) LT1????
 
THE LT1 uses REVERSE FLOW COOLANT ROUTING which makes use of these heads designed for the standard coolant routing a huge problem on an LT1 engine build-up, AFR makes some nice heads for the LT1 and there are far less expensive ways to get 450-500hp from a LT1 than spending $3000 plus on the heads designed for a GEN I SBC and adapting them to a GENII SBC.
going with a stroker 396 build and the AFR heads and a decent roller cam like a CROWER 00471 LM sure seems like a smarter route if your starting from a LT1

example

http://www.airflowresearch.com/articles ... /A9-P1.htm

but think thru your options carefully,

http://www.grandsportregistry.com/dyno.htm
 
Yeah Grumpy,

I know that the Brodix Head Hunter heads would have to be adpated for LTx use. And I know that those heads require a special single plane intake, but I was intending of going that route anyway.

What really impressed me was the quoted low and midlift flow numbers and the higher intake velocity as compared to ported SBC (aftermarket or stock)heads. These sound to me like great part throttle daily driver heads not just all out performance heads.

Oval ports made Big Block Chevys more daily driver friendly and I have been seeing how great oval ports helped Mopar engine produced great torque number with smaller displacemaent as compared to SBC's with greater intake velocity and no dead spots along to intake runners.

Why no oval ports for SBC before Brodix came out with these heads???

BTW, Great article on that 396 ci LT1 build.
 
 
If Dart went ahead and green lighted a LTx version of their SHP block I would be all over that. But as you know they killed the idea for lack interest/market. Besides this is going into a DD with all the accessories not a weekend warrior/trailer queen.

Right now I am leaning towards a well built stock block LT1 with the B-Body accessories in place along with a semi-exotic topend meaning single plane EFI intake with a 4 bbl TB. Ported stock alum heads or aftermarkets is still up in the air.

Back to my original question what do you think about oval ports vs rectangular ports on a SBC???

Think the oval ports better for low and mid valve lift as they are for BBC's???
 
B'klyn9C1 said:
If Dart went ahead and green lighted a LTx version of their SHP block I would be all over that. But as you know they killed the idea for lack interest/market. Besides this is going into a DD with all the accessories not a weekend warrior/trailer queen.

Right now I am leaning towards a well built stock block LT1 with the B-Body accessories in place along with a semi-exotic topend meaning single plane EFI intake with a 4 bbl TB. Ported stock alum heads or aftermarkets is still up in the air.

Back to my original question what do you think about oval ports vs rectangular ports on a SBC???


they appear to be great heads, and if I could afford to go that route I would use them

Think the oval ports better for low and mid valve lift as they are for BBC's???
Click to expand...

thats an apples and oranges comparison, the better SBC oval port heads like the brodix,229cc or the SBC rectangle ports like AFR 235cc are far closer in cross section and flow rates than the BBC 253cc heads like the BBC 781, and the 305-315cc BBC rectangle port heads most guys are familiar with. and from a geometry stand point the oval ports make more sense as corners, in ports don,t usually flow as well and theres less surface area in a port for a given cross sectional area in an oval than a rectangle runner or port for a given volume .
 
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