mjr46

yeah I ran 93 octane with 58cc afr aluminum heads.. the only reason I removed it was I sprayed it with NO2 and took out the mains[:@]..but it ran hard!!!......when I get some extra cash I'm gonna redo it soon....right now the block is sitting on my work bench and pistons and crank are in a box...I decided a few months ago to fix the 11 to 1 306 the way it needed to be done to with stand No2 it was gonna be almost as expensive to do such vs have a ready made more powerful 347 short block sent to my door.. so in went a 347

silentvoice19

man do i still have to have my block blaanced with hyper pistons?

silentvoice19

i called keith balck and im gonna go with some keith black hypers. Problly in the 10.1 comp ratio. Looks like ill have to pick another cam out.

woodsy

yes the rotating assembly needs to be rebalanced due to the weight differences in the pistons.

silentvoice19

ok you guys have been awesome thanks for the help

code3GT

Good luck with your build.

silentvoice19

Thanks guys want my to post pics of the rusty block lol?The cyls did look bad until i took the pistons out

silver91gt

not true, the key to making hyperutectic pistons last is to AVOID detonation, and make sure fuel supply is adequate.
I sprayed a 200hp shot on my 308 with some speed pro hyper pistons, when I took it out to put in my stroker the pistons looked brand new.
and I beat the hell outta my car all day long with the nitrous, Ive seen many 1993+ 5.0 motors live for years with 15# of boost.
theres nothing wrong with them, and may make more power on a naturally aspirated motor because the pistons expand less and can have a tighter piston to cylinder wall clearance.

silentvoice19

werd man thanks for the input

IN2FORD

I am running the SpeedPro hyper's. No problems here. Unless you are going to run a ton of boost or N2O, hypers are fine. Even with mild boost you would be fine. Here is a pic of mine..

[IMG]local://upfiles/85905/7A1BF6B6E70140B9BAE33F6DB5C25130.jpg[/IMG]