High Compression + Cams Fired Up Today
04-19-2011, 06:34 PM
#22
4th Gear Member
Join Date: Jul 2008
Location: NC
Posts: 1,956
I can throw 14-16 lbs on it NP. Its easier to make power with higher compression. Video doesnt do any justice its pretty loud,almost annoying for a street car. For all of you tht wonder what tranny its being abused through its a built 4r70w with a new 3400 9 inch converter
You can it's doable I got few friends with similar setup one runs a twin screw the other one turbo on about 12-15 lbs and make some mean *** numbers. To answer your question yes thats one of the major reasons I studded it because of
more clamping force. It might not make sense to most people but it
works.
more clamping force. It might not make sense to most people but it
works.
I'll ask again. How much boost and timing do you think you're gonna throw at a 11:1 comp motor with pump gas and make it last?
Rest assured sir, your "friends" are not running 11:1 comps with a twin-screw blower at or near max boost on 91 octane. Rest assured that if they are, they are on borrowed time. Studs don't have a damn thing to do with the reliability/stability of an 11:1 comp motor on boost. You can have jesus studs if you want. I dare you to run 16lbs of boost on an 11:1 comp motor and not have to run such shallow spark advance that the piston is running away from the mixture. Forged pistons melt at around the same temperature that cast pistons do. Yes, we all know its "do able" but for how long is the huge question.
One thing is for absolute 100% sure. 11:1 comp motors are not "built for boost." I highly, HIGHLY suggest picking up a copy of Advanced Engine Management by Greg Banish and start reading. You really need to educate yourself on whats going on inside that engine because you have been mislead. Take it how you want.
04-19-2011, 11:28 PM
#23
6th Gear Member
Thread Starter
Join Date: Apr 2006
Location: Las Vegas
Posts: 5,010
Dont worry about it dude. No need to preach here its already been done by us twice so no need for suggestions.. If you want to disprove that theory come to vegas and WE'LL SHOW you how its done. Im runing KB pistons and yes the heads are worked a little bit. The car isnt meant to boost 14 lbs all the time thats track only.
04-20-2011, 07:35 AM
#25
4th Gear Member
Join Date: Mar 2010
Location: GA
Posts: 1,232
One thing is for absolute 100% sure. 11:1 comp motors are not "built for boost." I highly, HIGHLY suggest picking up a copy of Advanced Engine Management by Greg Banish and start reading. You really need to educate yourself on whats going on inside that engine because you have been mislead. Take it how you want.
04-20-2011, 10:36 AM
#26
6th Gear Member
Thread Starter
Join Date: Apr 2006
Location: Las Vegas
Posts: 5,010
Thank you!
hangwire you just keep board reading and study those books real well
and board racing and well keep sweeping up trophies and do what we do! Unless you have done it you have no SAY in this this thread!!
hangwire you just keep board reading and study those books real well
and board racing and well keep sweeping up trophies and do what we do! Unless you have done it you have no SAY in this this thread!!
04-20-2011, 02:51 PM
#28
4th Gear Member
Join Date: Mar 2010
Location: GA
Posts: 1,232
04-20-2011, 04:16 PM
#29
2nd Gear Member
Join Date: Sep 2007
Location: Az
Posts: 389
I am sorry but I am with hangwire on this one... yes It can be done... but with pump gas It will not last long... because there will be detonation... High comp + high boost + Las Vegas Hot weather - racing gas = melt piston
04-20-2011, 04:24 PM
#30
2nd Gear Member
Join Date: Sep 2007
Location: Az
Posts: 389
as far as I know people build low comp F/I engines to avoid the need to use high octane fuel...