Re: Modified questions
 

Thanks, didn't have my rulebook handy. The w2 would really be the only choice for that combo, and when done right they flow pretty well. I don't do very much small block stuff, but I would imagine that he is running a later casting, 48* (if a 48*block is allowed), small chamber non econo head so he can run the t&d rocker gear and not have the valvetrain stability issues that the 59* would have at the rpm he's probably turning.

Re: Modified questions
 

Have been looking into this myself lately..

From what I have understood, NHRA allows the 351C style Yates heads as well, they all have a Ford Part # cast in them. I am looking at a 311 Yates heades combo for ours.

Re: Modified questions
 

I sure hope they allow the Yates heads, cuz thats what I'm building. Curious, why are you building a 311 cube engine? Cant run SS/CS with them and 311 is kinda small for SS/BS is'nt it? Maybe I missed something. Or, maybe you're building a SS/?M with 2 fours? That would be a screamer!

Jay

Re: Modified questions
 

We are actually looking at G/SMA

Re: Modified questions
 

The 311 Yates headed piece is a good fit for SS/DM WITH 2 4BL

10.50 x311 3265 less the auto break -163 = 3102 NEED 817ISH HP TO RUN THE RECORD 150MPH
530 FOR THE INDEX
SS/CM

9.50 X311 2954 - 147 2807. 909ISH HP RECORD 158MPH
530 INDEX

WEIGHTS WITH DRIVER INCLUDED

Re: Modified questions
 

anyone going to the ihra divisional race at thompson ohio? is it a fast track?

Re: Modified questions
 

The N351 short deck motor should be a great CS motor. Another plus with the Ford is a finished 8.2" block won't cost you almost twice as much a 9" block as is the case with GM. What it will take to get the gains on the track is another story, but the 15°W2 (or even the standard 18°) and the 10° N351's just look better for SS/CS than the bowties. Main thing is the pushrod pinch isn't nearly as bad as the chevy. (no external port modifications in the port areas). The port cross section on the Dodge or the Ford can be much more consistent.
But, Mann's may not be impressed with my observations as his stuff is flying. There's always at least one racer who screws up a perfectly good theory.

Re: Modified questions
 

Find early heads raise the port 1/4 to 3/8 " fill the floor to the short turn. There is enough material in the roof of the casting.

Re: Modified questions
 

Jay, we've done top-ends for 314 and 315 inch BS motors. So, I guess 311 could fit too.

Ralph, you're right on those 351 iron heads. They also have pretty good bowl thickness as cast. They have great potential for CS. A friend of mine out in Washington state has built them for allky round track racing, and tells me they will flat out make more HP per CFM than a bowtie. Considering they will potentially flow more than a bowtie, that sounds promising.

Re: Modified questions
 

I am also looking into building a ss/cs car and would like to know if you have to adhere to the normal nhra listed runner size of a year/hp combo like standard ss.

Joe Adkins