Which heads?

-
X's 2. But what do I know standing next to a pro builder and his dyno. I guess been there done that don't mean ****. Cod have done it all wrong as well.
 
318willrun said:
If I was to use magnum heads, I would just put the whole magnum motor in the car. I have a pair of good 318 heads on the car and a good pair of 308's on the bench. I know there is gain going either way, but I'm trying to reach high 13's on a very mild 318. Every tenth counts, that is why I'm interested in different perspectives. Keep in mind, I'm using manifolds instead of headers, and that will help low end torque if I was to use the 308
Click to expand...
I don't know how it relates to the 1/4 mile, but I ran 8.91 in the 1/8th with a .030 318, had the typical rebuilder pistons, stock 74 318 heads, no port or bowl work, old wolverine hyd cam, was about 455 lift I think, and a iron TQ intake and carb. This was in a 70 duster, 904 with a old slant six converter, and a 3.23 rear gear. That motor ran hard for what it was! I wouldn't use the 360 heads either, but the magnum motor would be the way to go
 
rumblefish360 said:
X's 2. But what do I know standing next to a pro builder and his dyno. I guess been there done that don't mean ****. Cod have done it all wrong as well.
Click to expand...

Never said all that. Stop it! lol All I am saying is on the one hand we have empirical data that clearly shows evidence. On the other hand, we have opinions of people who have years of hands on experience. I never said one side of the argument was more right, just that one side seems to have evidence. I never took anything away from you. The fact is, that until someone runs the numbers on a flow bench and a dyno, ALL opinions here are still opinions. Do you have a flow bench? I don't. Do you know how to professionally port heads? I don't and I don't have years of experience with a flow bench or porting, but I know somebody. lol That's all I'm saying. I'd like to see the data myself. But until I do, I still think the 308s are the better choice. I've been wrong before, so it ain't like anybody's gonna get any cherry.
 
I do know that the intake port is a big mismatch to the 318 head port, and that cannot aid in performance. I also know from past experience that the 318 port can be opened up but still won't completely match the intake. I do need to pull harder on the upper end of the rpm's, because I need to be at approximately 98-100 mph to break into high 13's (an average for most cars at that E.T). I was at 84 mph, but with the 4bbl now I guess approx. 87 mph ??? I need to find approx. 10 mph or so, and a 340 cam won't cut all that, so something has to be done to the heads, either some work (me and my dremel) on the 318 heads or the 308's (65 bucks for milling .040).
 
You must log in or register to reply here.
-

Back
Top