MRHD66

and neo heads flow more stock and fully ported too ( and thats even with over sided values in the RB26 head and neo with stock size)

yeh i Boost level, cam duration have alot to do with it

so what CR could i run with 100 ? 10;1 ??

got a united servo up here with 100 premium unlead too

why not get one of these the boilt up to the bottom half of factory plenum https://www.plazmaman.com/shop_itemdetail.php?itemid=136&cate=38 cheers

Water meth looks like the way to go then

i forgot thet E85 burns colder ;/ so it just wont work

well if i put 98 plus booster would be the same if not more octane then E85 and you can run something like 11:1 with turbo with E85

whats people thoughts one running 11:1 CR on a RB30det with 98 plus octane booster as i cant get E85 up here ( near forster NSW) cheers

http://www.lewisengines.com.au/category15_1.htm rb25neo head will flow more the a RB26 or RB25 and neo is $5000 cheaper

yeh thats true kelford do

any more updates on this setup

ive been doing alot of research since one of my mates told me to use a RB25neo as they got good flow i found .lewis engines can port a RB25 neo head 308CFM for $2000 and there RB26 headFully ported is 300CFM with bigger valves for $9000 http://www.lewisengines.com.au/category15_1.htm they need to make more cams support for the RB25neo cheers

will do mate

a interesting read that RB25 heads flow abit more up top but with more lift then the RB26 RB25 - STD valve size - 100% cnc ported Valve lift .100' .200' .300' .400' .450' .500' .550' Intake CFM 91 172 228 261 272 281 286 Exhaust CFM 76 136 176 188 192 194 196 RB26 - Accepts s.t.d. or oversize valves - 100% fully c.n.c. ported Valve lift .100” .200” .300” .400” .435” Intake c.f.m. 97 179 247 280 285 E xhaust c.f.m 83 146 173 188 192