Ok i am trying to decide between Afr 220's or Vic Jr's the Vic Jr's will be bare and i will be supplying my own valve train and having them ported not sure who will would be doing the porting or do i buy the Afr 220's and still have to buy the right springs locks and retainers. Remember this is a 306 with a ysi making around 21psi
SBF Afr220 or Edelbrock Vic Jr's
1 - 16 of 16 Posts
My shaft mount rockers will not work with trickflow heads
Joined
·
736 Posts
Why would u need to buy new springs, locks & retainers for ? If ur ordering new then u would tell them what springs u need. Reatiners i can see u getting the Ti ones if thats what ur talking about & If not they come with the steel retainers. are u running a solid roller or a hyd roller cam ?
Joined
·
357 Posts
I had Vic Jr on a 393 sbf. X trim 22lbs of boost. C16 non inner cooled. Blow through. Made 1115 hp. Vic Jr is a good head. Brian Mitchell also ran Vic Jr on his ren car and was one of the fastest guys running a ysi.
How much port work was done to them
Joined
·
357 Posts
They were ported by hand. 2.08 int and 1.60 exh. [email protected] lift int. 220 exh.
Joined
·
736 Posts
This is Kevin ? i can tell u what springs u need to get with the 220 head. If u r getting them from afr or whoever tell them u want the 8002 spring that afr offers. That will put u @ 165 lbs on the seat @ 1.950 installed height & give u 430lbs open pressure. Its good up to 650 lift those r the springs i ran with my afr 205s with the freezy74 hyd roller cam & crane tie-bar lifters. Btw way afr wont charge u for the springs if u let them know those r the springs u want when u buy the heads, they will charge extra for the ti reatainers, i set my heads up myself pretty easy to do.
Yep its me i bought that cam off my buddy he sold his project off i was kinda disappointed i was really wanting to see what it would run but oh well so now i have it and i am gonna stick in my motor with a bad ass set of heads and we are gonna see what happens. I worked at a machine shop for a couple yrs so setting them up won't be to bad to do myself.
Joined
·
736 Posts
Well that sucks, like u said try it out in ur car i made 919 rwhp with that cam and ran 8.70s @ 158 mph
What i did find out was the cam made the best power @ 6800 rpm i tried shifting higher didnt make a difference. Btw my pulley combo was 8'' crank & a 2.75" supercharger pulley.I am hoping that with mine being a 306 that i might gain some more rpm out of it and the Afr220 head's i was only turning mine 6400 and making 21psi if i can turn it 7000+ i hope to see 25psi+ and 800+ hpWell that sucks, like u said try it out in ur car i made 919 rwhp with that cam and ran 8.70s @ 158 mph
Joined
·
736 Posts
Thats true smaller engine might change the power band of the cam. Kevin the Ysi like alot of rpm so if ur not planning on spinning the motor that high u need to run a smaller blower pulley. Trust me u put a 2.75" blower pulley and shift @ 7000+ u will make 30lbs+ boost and make 900 rwhp
Dont be scared broI am not afraid to turn it that's forThats true smaller engine might change the power band of the cam. Kevin the Ysi like alot of rpm so if ur not planning on spinning the motor that high u need to run a smaller blower pulley. Trust me u put a 2.75" blower pulley and shift @ 7000+ u will make 30lbs+ boost and make 900 rwhp
Hey bud, I'm just wondering what the compression ratio was on your pistons for that 393?? What rotating assy did you go with?
1 - 16 of 16 Posts
Join the discussion
