Simple question in general is one better then the other, mostly looking at the CNC Brodix against the AFRs?

Jeremy

 

whats better ford or chevy.. that s about the question you asked.

not gonna be a real answer to it. its gonna depend on alot

brook

 

Your wrong its mopar!

Lets stay N/A, does that help narrow things down?

 

Probebly need to know for what setup...

 

hey try ET Performance heads, some of the best made. they are coming out with new casts really soon, i think they already have some out. 2200-3000 assembled dependin on what cc you want. flow better than afr and brodix

 

I think you were mis-informed. I have spoken with Cary @ ETHeads about LT1 casting heads and there obviously isn't a large market for them. I did however see their first set of LS1 casting heads. Amazing how the CNC porting machine works! They had 3 of them in action turning out their new castings. They relocate the valves and such and other new technology but this doesn't have anything to do with the LT1. I have done the Brodix conversion and it's a lot more work than it seems on paper. Its not expensive to get the coolant ports changed over, however it is expensive to spend $400 on the intake and get it ported. I dont know if youve seen the HV1800 intake yet but High Velocity leaves a LOT (a lot meaning they use the same intake on different shaped ports) This MUST be ported and to port match this will be another $500 or so. On top of that getting the EFI conversion done and converting to the distributor. I had a set of JE pistons 18* forced induction pistons with 22cc dish's, the valves still hit! As you know the valve locations are changed on these heads so the valve completely missed the valve relief, even with a dish. This involved fly cutting etc. All in all I got a little more than I bargained for. If you looking to convert a set of heads go with a Track1 or similar... they are going to flow decent for a good setup. All in all this conversion cost me about $7,000 in misc crap that wouldn't be necessary with normal heads. My brodix heads flow in the 33x range, but my buddy with Track 1s got his in the mid 32x's Something you may want to consider.

 

ahh lol wasnt paying attention that it was for an LT1, i was thinking ls1, my bad

 

Depends on the particular head. From what I've read/seen of AFR, their CNC port needs a bit of work. On the other hand, Brodix has a number of heads that are ported by Weld Tech... the Smokey Yunick, Hutter variants, etc.. All of those ports are top notch CNC just like you'd see from a good race head. That's not to say that they couldn't pick up a little with a talented porter but they won't need as much work as the AFRs.

Edelbrock also has a lot of nice CNC heads ported by Chapman if you're looking for other options.

-Mindgame

 

Those ports do look nice, but the edelbrock heads have horrible chamber design and suffer greatly in flow. Their transition from seat insert to chamber wall is 90deg.

I havent seen their LS1 stuff as it is not realesed yet, but the above is true for almost all their other castings.

 

What Edelbrock heads did you see this on? What specific port and part number?

Bret

 

Bret beat me to my question.

M1, please be more specific in your posts. Chapman does a number of Edelbrock heads. Most of the ones I've seen are NO slouches either. I've known people to look at his numbers, which aren't the biggest out there, then wrongfully conclude that he must not know what he's doing cause the other guys "are getting more". His ports are obviously well developed and every one I've seen (the 15 and 18º) put down great HP/TQ numbers.

-Mindgame

 

Yeah that's what I was thinking as well.... the heads look like they would be slow but they are a hell of a port even if the 28" numbers look "soft"

Bret

 

I am not critical of their ports, they are very nice, just the seat to chamber wall area...

77189 Victor jr SBF
60779 Mopar Perf RPM
60069 Ford FE Perf RPM (great head considering so few availible, makes good power)
77599 Victor jr SBC

some others just don't remember.

My complaint is seats that sometimes protrude into the chamber, 90deg transition from seat to chamber wall. After several sets, I only use them on cust supplied stuff, there are better options availible. The problems are in area's that cant be fixed with porting.

So I still use them on FE and mopar stuff, but use dart, pro-action, trick-flow, and AFR on others.

 

Now I know edelbrock has changed some of their castings, and their CNC lineup looks pretty decent, but unless they changed the chamber shape, the CNC toolpaths will not help.

 

That's what the two of us were wondering the CNC stuff. The stuff done by Musi and Chapman is all I was wondering.

Bret