Another head poll

The application is a 305 SBC. The head options are:

1. Vortec 350 heads milled down with a steel shim gasket.
2. World Products Torquer 305 heads.

cmon now...bunch of haters.

lol maybe none of the people know what head companies they are?

i know a head company in a whore house haha

i know a head company in a whore house haha
lol! which hoe is the best? i think amanda is!

The application is a 305 SBC. The head options are:

1. Vortec 350 heads milled down with a steel shim gasket.
2. World Products Torquer 305 heads.


Straight mill or angle mill? to what size cc for the combustion chamber?

straight mill 61cc

i don't know why you wouldn't go with the vortec. I have vortec 906 castings (not installed yet, engine swap still in progress). Vortec will give you the best flow out of the box, no porting necessary. Vortec = proven power. 305 heads on a 350 is not a good idea anyway. They are not made to accomodate the larger displacement.

my engine is a 305

goin with vortec will drop my compression. I'm also sure that the torquer's will out perform the vortec's, most ppl just use the vortecs cuz you can get em for cheap. The price doesn't matter to me tho. I just want the best performance choice for my 305.

whoops, yeah sorry. I was thinking you've got a 350. In that case....

put a blower on it. (in your words ;) )


well... there's been a lot of controversy about mix-matching 305 and 350 heads on different engines. I remember reading something from, I think, hot rod mag. They did a dyno with both types of heads and turned out 350 heads on 305 did not make any improvement in performance. but of course you can get different results with different particulare heads. I would go with what's logical, port/polish 305 heads, with good intake and cam.

or Vortec and , put a blower on it.

the torquer 305's are performance heads from World Products.

so i'm sure the port and polish part is already taken care of.

my reference didn't mention either, just my recommendation.
http://www.americanspeedcenter.net/WorldP.asp

yea, the s/r Torquer 305 WP-042750-1 are the ones i'm talkin about. they have the same 58cc combustion chamber that my stock setup has.

lol! which hoe is the best? i think amanda is!

Hey now, amanda is my girlfriend :nono: and she's not a HO! not yet any way. :lol:

You looked into AFR's? Awsome flow numbers.

No I haven't, but I will now, thx.

www.airflowresearch.com

. I have vortec 906 castings


dude, just checking, but you know those are the less desireable castings right??? do not try to enlarge valve seats, and use a dual pattern cam with a little more lift and/or durration on the exhaust side to compensate for its lesser air flow. the desireable vortec castings are the 062 castings found on R code engine equipped CK trucks. just a sidenote to the conversation.

305 heads on a 350 is not a good idea anyway. They are not made to accomodate the larger displacement.

305 valves handle the displacement of a mild 350 just fine. the only drawback is there designed smaller bores, so you get overhang into the cylinder area, but an hour with a grinder and problem solved. plus the 58cc jumps the compression a little compared to the 64cc 350 heads.

now 350 heads on a 305 is well...like a 36 inch dildo....kinda pointless. unless you've got a blower

why is everyone voting for the vortec heads then if everyone realizes that they'll be bad on a 305?

remember, i'm keeping the 305, i'm not swapping in a 350.

yea i got some vortec 906's i gota sell , cause i need money for a another camaro.

actually, the vortec heads will be AWESOME on a 305. so long as you keep the small valve sizes. you can either mill down the heads for smaller chambers, or run a small dome on the pistons, or a steel shim gasket, its very doable. the small valves will work great with the 305 bore x stroke ratio because the 305 is designed for low rpms, and the small valve ports on the heads will have great flow and high port velocities at low rpms, so youll have pretty stout torque from idle - 4500 rpms, which is what gets these cars movin in the first place. so once you handle the compression issue, you can get a nice balance of both worlds, the torquer SR heads will make great low end power, but the vortecs will extend your power band up a few hundred more rpms. so you could probly still run the 906 heads on a 305 seeing as you have to keep the small valve sizes to clear the bores. but some mild port work, three angle valve job, and some manley street flo valves would really make the heads flow some air. and still have high port velocity for better atomization of the air/fuel ratio.

ok, which would require less work, cuz i'm lazy?

ok, i guess i'll get the vortecs, but I know shit about porting and polishing, and 3-angle valve jobs, is there a how-to anywhere online?

wanna buy my heads lol they've been siting in my garge for so long and i want something else

89IROC how do you like those 906 castings? I got mine from a pretty good company off eBay. completely redone, new springs, valves, 5-angle job, etc. Didn't find out about the downside to the 906's till after I bought them. Now I'm not sure if I want to put them on my engine. Everything this on this engine is going to be for super street performance, and I'm not sure how much these heads will set me back. What do you think about them? got any power numbers and/or specs? I've read in a couple places that these castings don't affect power too much.

Mike123, I probably would, but last time I tried to buy something from someone here, i sent the money and never recieved the item. It wasn't cheap either.

the 906 castings arent a death knell or anything, its just that their performance potential is limited, stock for stock the two heads, the 906 vs the 062 castings are pretty similar, i think the 062 has more exhaust flow. but where the 062 castings are better is the freedom to modify the valve seats for larger valves, and do extencive port work. the 906 castings have to pretty much be left alone, but a dual pattern cam like i said before should help that situation. for a street engine the 906 heads should do fine, but if you plan on doing any racing or high rpm performance, then youll want a set of the 062 heads that you can fully race prep.