If I did a 331 with all the stuff i'm doing, could I make 400 RWHP with a cam from jay? he was talking around 300-310rwhp with my 302 setup and a roller cam.

 

what would be wrong with running a flat tappet cam? My dads 70 mustang has a nasty 302 with a flat tappet and that thing is retarded fast (not sure of motor specs, my uncle built the motor when I was too young to understand what any of it was)

 

the heads I have came with AFM hi rev springs - to stiff for a flat tappet. so I would have to change, downgrade, the BRAND NEW setup to stick with flat tappet. If I go with a conversion or a roller block, I can use a roller cam and get a few more rpm's and 2-3mpg more!!

 

with the removal of zddp from oil it is now ever so important to run a replacement additive when breaking in flat tappet cams, where as roller cams need not.....and roller cams rev quicker = less friction and wear on valvetrain parts

 

AFR 165's = a 302/310 setup, strokers require a better set of lungs. Since you have a non-roller block, another alternative you could check is a TLSR (Tight Lash Solid Roller) cam from Jay. Will you have to upgrade the springs?.... yep, yet it'll be worth it due to the HR link lifters vs SR link lifters cost difference..... - OR - you could sell those AFR 165's and upgrade to a TFS 190's "fast as cast" + custom cam package from Jay........ correct springs for the TLSR cam included at no extra cost for either set of heads. Just a thought. BTW.... total valve lift has nothing to do with possible PtV issues.

 

if thisis the same as a reduced circle base cam Jay dont do them anymore

what is wrong with my AFM springs?

what is the difference? standard vs roller conversion lifters?

I understand that now

thanks for your input

 

height of the roller lifter is different and they have link bars to hold them in the proper position so roller rides true on cam lobes

 

Nope... solid roller cam, standard base circle, Jay does a lot of those.

Not enough pressure for the more aggressive lobes in a TLSR cam, that is something that is known after the cam is designed though + it's not only a "spring good to .xxx" lift" spec, valve closed/opened pressure and pressure rate is more important.

Like MJ said, the SR linked lifters height is compatible with a non-roller block and less expensive than the HR linked lifters you need to stay away from a smal base circle HR cam.

 

joel5.0
I guess what I said is what is HR & SR. I dont know these terms.

how do you know wich springs I am talking about? AFM has several.

 

HR = Hydraulic Roller
SR = Solid Roller

I know, reason why you always "plan for the worse, and expect for the best"..... - OR - what if the AFM springs you have don't cut it for the cam design. BTW.... I only see 2 AFM valve spring choices