small block 18 x brodix cylinder head????

fastbuick

Daily Driver
Nov 8, 2008
33
0
0
HI. my engine 434 chevy with brodix cylinder head 227 cnc compression 11.9 with this head i make 684 hp and621 tq.now i want try to make 750hp.i want try head brodix 18x. ineed help and result from racerrun this headon the 434 and compression ratio?? i appreciate suggestion at the same time thank RICHARD
 

kevind

Dragway Regular
Jan 7, 2009
868
0
16
Whitley City KY
I think You would be better of with 18C head its a true 18 degree and they will actually make 750HP. What heads are on Your car now 10x 11X or?
 

fastbuick

Daily Driver
Thread starter
Nov 8, 2008
33
0
0
HI KEVIND. now on my engine i have brodix track 1 with 227cc runner this head is full cnc my intake super victor 2925 full cnc with carb pro system 4150. cam jones cam design 262/272 at.050 lift 682 net very good engine ,happy to talk with you .RICHARD
 

kevind

Dragway Regular
Jan 7, 2009
868
0
16
Whitley City KY
You will have to change pistons with 18X or 18C. Are trying to reuse any of Your valvetrain stuff?
 

fastbuick

Daily Driver
Thread starter
Nov 8, 2008
33
0
0
KEVIND with the18x i need to change piston HEAD bolts rocker and lifter is good header is ok. with the real 18c i need to changed piston offset roller lifter .i needrocker shaft valve cover, modified header flange not the same job and price thank RICHARD
 

kevind

Dragway Regular
Jan 7, 2009
868
0
16
Whitley City KY
I checked into a set of 18X heads a few years ago from what I was told at the time they are worth 30 or so HP over the Heads You have. I was also told that to make big power like the 750 Your looking for would take alot welding and alot epoxy to get the ports in them were they need to be.
 

mike from bc

Dragway Regular
Jul 13, 2003
958
0
0
maple ridge bc
4 yrs back my buddy did a 436sbc with 18X heads on it , 15.5/1 comp .750" roller cam , belt drive , vac pump , ported intake with a Pro System 950hp , it made 750hp and ran a best of 9.39 at 3200lbs , he now has a set of KC227 T1s with a hyd roller and pumpgas and he,s been a best of 9.59 .

as for making that power with your heads it can be done just need some serious port work and intake work with a big roller (.800"+)
 

chop57

Frequent Racer
Oct 26, 2008
417
0
0
g-town mass
brodix 18x heads are good but theirs better out there, have you thought about running sb2 stuff?

i hear these guys are pretty good http://www.raceflowdevelopment.com/
 

flatblack79

Pro Stocker
Feb 28, 2010
1,796
0
0
Stockbridge, Georgia
the guy my dad works for has a 434 with brotix 18*s it made like 930- 950 some where in that range to the ground with a 200 shot. i dont know what his comp. ratio is but he runs some weird red vp fuel ive never seen before.
 

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