Head dillemma, is it worth it (brodix IK or Holley systemax kit) - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-10-2008, 06:10 PM
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Head dillemma, is it worth it (brodix IK or Holley systemax kit)

Hey guys, I'm still in a cylinder head dilemma. I have been looking very hard at the brodix IK 180's and just adding them to my current set-up:
piston:KB119-.100 solid/-0.5 effective head volume w/ full floating wrist pins
Heads: stock 350 heads what ever came on the 69 chevelle 350, i think 76cc
(soon to change i hope)
Induction: holley 650 double pmper weiand Team G intake
Cam: Lunati 300/300 adv. dur. w/ 515/515 lift bracket master 2
crank: eagle nodular, stock everything
rods:GM 5.7
deck: stock
fel-pro 350 overhual kit for gaskets, nuthing special
TH-400 stage 2 33-3500 dacco stall converter
not positive on the gear, but i think its 3.08
I was wundering if any of you guys had a desktop dyno that you could put my set up into with the brodix heads for a HP estimate. The reason is that I've been told my components don't really match up. So, I really was looking into the holley systemax engine top end kit and just use my block, pistons, and crank. I just need to know what will perform the best, and if it would even be worth the extra $650 and the work to change the cam and every thing that comes in the holley kit. If it won't be that big of a difference I won't do it, i'll just stick with the brodix IK's.

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Old 09-10-2008, 06:12 PM
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rear end

Just so you guys know the rear end is next to get upgrades. 4.11 with eaton posi. prolly strange 28 spline axles
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Old 09-10-2008, 07:13 PM
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Everybody and their brother is going to pick apart your parts one by one in favor of their personal favorites but, I will only address one.

Brodix Iron Killer heads, while they are well made and fit with no issues, are HORRIBLE for making horsepower. You'd be better off with stock Vortec heads in place of those things. As I've said before, the only reason I can see anybody using them is for the name and the fact that they are aluminum.

Holley's heads just aren't worth the money although they are ever so slightly better than the Brodix heads.




Larry
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Old 09-10-2008, 07:21 PM
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heads

well what would you use
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Old 09-10-2008, 08:33 PM
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AFR 195 . would be a good choice
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Old 09-10-2008, 08:51 PM
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Quote:
Originally Posted by eatonde
well what would you use
All Pro page 13




Larry
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Old 09-10-2008, 08:53 PM
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Quote:
Originally Posted by 406 bug
AFR 195 . would be a good choice
I would second that vote for the AFR's. I have them on my SBC and they are great heads. The Edelbrock Performer's are a very nice head as well and are a few scoots less than the AFR's. Vortec's are a great value if you are working on a budget.

Beagle
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Old 09-11-2008, 12:01 PM
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AFR and vortec and dart

well guys, the problem is i don't think i'll be able to use the vortec or AFR if they have the fast burn design. The domes in my motor will at the least cause inerferrance with the burn and probably create clearance issues. Not to mention the price of the AFR's.

I don't need anything to extravacant, Just a pretty hot street motor. That I'll occasionally run the quarter with for fun. Plus I need a 68-70cc chamber (with aluminum) to achieve about a 10.5:1 CR and i don't know if the other ones offer a 70cc chamber. I know the IK 180 does come in a 70cc chamber and i should not have to worry about clearance isses with that head. I'm not looking any further than say, 450 HP, I'd be happy with 425. I'd say its prolly around 365 now, but thats just a guess. Would the brodix head not let me achieve those numbers if i get a matched intake?

I've seen the Holley systemax heads produce 422HP/441TQ with a comp XE268 cam and 10:1 flat tops. I also believe i can get it in a 68cc, which i could prolly get away with if i run some octane booster. I just don't know which would be better. Has anyone used the Holley systemax top end kit?? what were your numbers.
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Old 09-11-2008, 08:09 PM
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one of the best (if not the best) bang for the buck in a 23 degree midport head is the tfs 195 cc head

i put a ported set on a 406 made 528 horse and super streetable

the guy who does my porting showed me a dyno sheet of a similar afr headed motor (only difference was my 11 to 1 v.s. his 9.75 to 1 comp ratio)
the afr headed (not eliminators)motor made 475 ish horse
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