JeffP

Good or bad? Is this a good budget street head? Intended goal is no more than 300hp N/A, with maybe 150hp shot of nitrous.

Overall, is it a decent cylinder head?

Thanks!

Engineboy

I'm going to assume the number is 33417369 since the other didn't come up on any ID chart.

This is from www.mortec.com

33417369...90-up...350..........Gen.I Goodwrench crate motor,"Hecho en Mexico", 76cc

Sound like basic SBC heads. Just as basic as basic gets.

I would look for a better starting piont, especially if you will be modding at a later date.

------------------
ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

[This message has been edited by Engineboy (edited October 18, 2000).]

[This message has been edited by Engineboy (edited October 18, 2000).]

94-6spd

I have these same heads on my car right now. I run low 14's with 9.7:1 compression, Comp High Energy 268h cam, heddman full length headers, Performer RPM intake, and a 600 cfm Edelbrock carb. I also have a 700r4 with a stock converter and 3.73,s. I just got a set of vortecs but haven't put them on yet. Hopefully I'll get 13,s.

I think these heads can easily get you 300 hp.

JeffP

So, do I have the wrong part number, 94 6spd? Or do you use the part number I listed in the title?

92RSFivePointSlow

I'd like to know the cfm rating on these heads too, I've been told 180cfm and I've been told 240cfm. If they are the larger CFM, they can take a motor making over 300hp, because they can be ported alot bigger. Any body know the answer to this one?

Matt87GTA

I don't have the flow numbers, but no friggin way do those POS castings flow 240 cfm..... Probably not even with some work done to them.....

92RSFivePointSlow

supposedly there was an "emissions" version that had the real low cfm, and then there are the regular ones which are opened up a bit more. Just looking for some insight as to what my potential is with these, comparing them to a pair of say, 462624 L98's, since they are also 76cc. I'm trying to keep this as cheap as possible. How do these compare to the 376450 castings, 60cc found on late 70's 305's?

myers

What year style intake do you have. I was looking at edelbrocks website and saw 55-86 styles and didn't know what style I needed for the bolts to line up right.

F-BIRD'88

None sre hi perf heads. All will struggle to make 300 hp.. Yes they all do get better if fully agressivily ported.
305 heads 185 cfm.. 76 cc heads 190+/- cfm
462624 are not L98 heads. One of the worst 76cc heads.
L98 heads are either 083 or 217 or 113 aluminum.
All high perf heads are 64cc
Get a set of vortecs 062-906

Fast355

iTrader: (2)

624s WERE on some L98s. Just never on a F-car. Think 85-86 cast iron Vette heads. L82 engines also had 76cc heads. Those were some sad days for performance.