Heckeng

Man, you guys are killing me . I just got the "aluminum head" bug OUT of my system. All this talk is not doing me any good at all! Don, I have a general head question. If my combination runs well now, would it be worth while to swap up to some aluminum heads like the Canfields or AFRs if my cam isn't the most demanding? I'm basing my question on keeping the combo matched versus having a better set of heads than say the cam. My cam is the 502/502 hyd. roller cam which is 224/234 @ 0.050" and .527"/.540" lift. My compression is currently too low for the aluminum heads I think (8.75:1) but I may be changing that in a year or so. Also, I currently have a performer rpm air gap intake, would it be beneficial to move to a victor jr? I normally street drive the car. I drag it occasionally, but not often. The heads I have on it now are the iron GM 325cc that come on the 454HO and have had the ports cleaned up and the intake bowl opened up. here're the rest of the pertinent specs: 2500rpm converter TH-350 3.55 gears, 28" tire 750 dp Curious. . .

I agree Mr. Wilson! 12's aren't spectacular at all!!! That is, until you look at the weight of the cars and that most of the cars you see here are able to be daily drivers. 10's and 11's would be alot easier with a 4000 stall and 4.11 gears instead of the a 2000 or 2500 stall and the common 3.31 or 3.55 gears. Also, not trying to dig into ya too much, but it's alot easier to make light of someone ONLY pulling a 12 (or 13, 14, or 15 for that matter) second quarter mile than it is to get your 4000 lb car to beat theirs! That is unless you have tons of $$$ and friends who are mechanically inclined! I think that once you start digging into yours you might chuckle at your post. Just one guys opinion! Welcome to the forum, lots of good guys and information here!

Oops, after looking back now, I see what you are saying. Sorry, didn't catch it originally. my bad! I don't understand why they would make a runner design that would not match any intakes, knowing ahead of time that the heads are always going to have a transition flow loss that would more than likely kill off any of the good flow work that they had designed into the heads. Somebody please enlighten me.

Match your intake style to your head style or vice-versa . I've not heard of anyone porting one style to match the other, interesting idea but I doubt it would work or be worth the effort.

Ok, I'm going to be a little bit of a Devil's advocate here! Why is everybody stuck on ovals? I say don't believe everything you hear. I know, everybody says that ovals are the way to go on the street, but I have a 454HO in mine and it has the Chevy 325cc Rectangular port iron heads, and it does great on the street, no bogging or waiting for the engine to catch up with iself. I only have a B&M 2400 hole shot converter, and 3.55 gears with a 28" tire. It also ran a 12.75 in the quarter at 106mph. When I find my time slips I will post the 60' time. I was surprised that It did as good as it did, but I think that the theory of oval for the street and rectangular for race has been blown out of proportion. Just don't get huge heads, with a tiny cam and highway gears and you'll be fine in my opinion. I say dump the cash on the 305cc AFRs, and if you get some extra money, get the chamber CNC option. I have also heard good things about Canfields as mentioned above. A friend put on some Edel RPMs on his ford, and they seemed very quality built also. I have also heard that Edelbrock makes the high performance heads for Chevy. Just the same as MSD making the GM high performance ignition that you see in the catalog. On the blown out of proportion myth topics, I also just switched out my 750 vac sec holley for a 750 speed demon double pumper, and it is doing fine! I was worried because you always hear "never run a double pumper on a heavy car" or not on the street, but it is working fine. I haven't had it at the track yet to see how it reacts with slicks, but on the street it is a hoot so far. Sorry for the subject change there!

OK, I'll be the odd guy out here and say that I've had excellent luck with my th-350. It's been behind 500-550 lbft of torque for 3 years now with not a single glitch! That included lots of hard running on street tires, and some racing with slicks albeit not that much! It does have a hardened sprag race and extra clutches/steels, but that is it as far as beefing it up goes.

12.75 with. . . 454HO unmodified Holley 750 vac sec MSD ignition with 11 deg initial and 36 deg total advance Th-350 with B&M 2400 stall 3.55 gears with 275-60-R15 (28") tires this year I changed to an RPM air gap intake, 750 Speed Demon Double Pumper,MSD distributor with 16 deg initial 37 deg total, 502/502 cam (224/234 @ 0.050"), Comp magnum rollers, Head bowl and intake/exhaust porting... Hope it wasn't wasted effort.