Hi Guys, I know I have read many threads about different piston makers. some threads were old and the pistons are not available anymore. some guys like those Nascar takeout's, I am looking for a forged piston for my 350, probably will end up .30 over. I want 9.5:1 compression so I have no issues with pump gas. My engine machine shop suggested JE pistons but they are extremely pricey. I mentioned Autotec because I had read of them on here. He emailed me the following: the block is in the machine I'm waiting for a call from auto tech about there pistons i called early today using there pistons the compression will be to high for pump gas i just want to see if they offer a 20cc dish that will give us 9:5:1 c/r if they don't we will need to order a set of je pistons to give us what we need .when boring a block u never know what you will find like air pockets or sand casting i like to test bore .006 from finished size then order pistons Autotec never called him back. are there other options out there?
e-mail Scott yourself.or Mike Phillips at am&p machine recently mentioned he still deals in parts also. http://automachperf.com/
Jim Wiese(of Trishield Performance and owner operator of v8buick.com) is now an AutoTec dealer if you want to call him.
Your going to have to make the call to Auto Tech, ORRRR better yet, go to their website, print their custom piston order form, then have your machinist fill it out. Don't wait for companies to call you back, most don't have the time or man power to do so, I know I've never had much luck. 9.5 to 1 is not too high for pump gas premium, I have 11 to 1 Auto Tech's, I spec'd that for The aluminum heads for the 350, but Im having to run my irons for now, should be interesting!
Once again, I post this link, http://cochise.uia.net/pkelley2/DynamicCR.html The static compression ratio is not the sole determining factor on whether an engine will run on pump gas or not. Pistons might be rated for a certain compression ratio, but that doesn't mean they will produce that CR in your engine. It is up to your machine shop to measure everything and get you to your target CR.
Thanks Larry, yes my shop seems very skilled. He has already CC'd the heads and knows exactly what piston s we need. I will try to get with Jim next week. Thank you guys for the advise.