ifucan said:ive done this...i used 1.6 rr and a stock cam...let me be emphatic...NO BOTTOM END, car would pull like crazy from 3500 up but didn't have any guts down low=bad short times, i can best equate it to a two stroke dirtbike...obviously like rick said, it ain't worth it w/o the supporting hardware...reason i did it was because i bought them for a 351w and just wanted to 'play' w/them on the smaller displacement engine till i got my new bullet done...in the end tho, i took them off for some p heads and im much happier...p heads have tq all over the afr's and still pull respectable up top(because they are a better match for my combo)...good luck...o and no flycutting here
ImportEater98 said:I'm still unclear on this, so forgive me if this has been answered...but...I am building up a 306. It has Keith Black Flat Top hypers in it. I would like to run an AFR 185. I know from previous searching that the 2.02 valve will infact hit a stock piston...do these aftermarket slugs have more of a relief in them to accomidate the bigger valve? I really don't want to flycut these pistons...i think it makes them weaker...they are as thick as they are for a reason IMO.
I would like to run the Comp Cams XE282HR cam 565/574 lift, 232/240 @0.50"
The AFR sight claims with 10.1:1 (I have about 9.6) this combo is capable of 455 fwhp......please steer me in the right direction!
No clearance problems with my setup with the stock cam.lickem said:ive got a stock 91 lx with a 302 and got a good deal on some 1.7 roller rockers and thought about putting them on to get alittle more fun out of it, am i going to have clearance problems by installing them? im not sure if i have the dish hyper's or the flat tops.
also a question on the afr 185's and 165's what is everyones thoughts on a supercharger application, still go with the 165's?
thanks
Hissing Cobra said:John, I got your e-mail and for some reason, I can't send outgoing mail. Therefore, I'll reply here.
Your combo sounds almost exactly like mine. As you know, I too, have a 306 with the Keith Black hyperutectic pistons. Their notches must be deep enough because I have the AFR 185's (58 cc's) and they fit without a problem. Also, my block was decked to create 10:8:1 compression. Definitely check with my brother (Retro 5.0 or Rick91GT) as they know their stuff about measurements.
As for the cam, I'm not too sure how big you can go. I've got an Elgin Pro Stock cam in mine (248 INT/258 EXH @ .50, .536 INT/.560 EXH) and it runs great on the street and on the track (12.42 @ 109) on 93 octane.
I do not believe that you'll get 455 flywheel horsepower but I could be wrong. Mine made 307 at the wheels, which would be somewhere in the 360-370 flywheel horsepower range. Of course, I may also be costing myself some horsepower because of my twin four barrel setup.
Good luck!