have a 13 dyna current motor 107 hillside heads 1.94 1.625 91.5 cc. s&s570 hpi 55.d&d fat cat 2 into 1 goes well 113 hp 110 tq .have also recently lower geared to 30/70 from 32/66 .like to rev it .i also have a set of r&r cast 2'' inlet raised port heads 87.6cc chambers on shelf. what would acheive more 3000rpm up cam and comp and what would be beter heads to use out of the two .
Do you know the piston volume ?
S&S 585 would be an obvious choice with the right comp.
+4cc pistons . been recomended 585s set at 10.75 just wanting other opinions to make my choice more complicated
Your only a set of gaskets away from trying the 585's.
Bolt the R&R heads on and that should put you at ~ 10.7:1
yeah thats what i recon using that big boyz calc with that set of heads.have you ever used the 585s
Some of Bobbie's valve bashers might suit as well, 8-6 perhaps? How much lift can you go? There are some real good ones around the 600-620 mark out there.
Tman 590 or 625 perhaps.
id flow test both sets of heads,scotts heads may out flow the R&R
that would be good to know .got another month of summer here going to be changing things this autum winter .ill get rr done now send hillside once pulled down.got the r&R of a guy second hand but never used .didnt need them but they were so cheap i had to buy them.
hilly13 the heads on bike stg 3 super tour they are 165-167cfm
@10'' @ 10"@.600"lift of there web site set up for the 570s .the r&r previous owner was going to run s&s625 and set up for them a project that didnt happen .thats all i know about the heads.