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Predict JD's high CR beater's dyno power
08-30-2008, 07:33 AM
#122
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: Predict JD's high CR beater's dyno power
I was looking at the ls head tonight thinking about the quench theory and found some old school pics again from the 1998 roughly performance honda book with both Jg/DPR with solid info amazing I thought this honda stuff was new :1
Welded ls head. p30's jdm. 62405A-2 crowers. Making your car shake like Michael J Fox. priceless.
http://jgenginedynamics.com/Adobe%20...ies%201994.pdf
old school proving even stock motors react well to throttle body upgrades. Off topic but for all the non believers.
Welded ls head. p30's jdm. 62405A-2 crowers. Making your car shake like Michael J Fox. priceless.
http://jgenginedynamics.com/Adobe%20...ies%201994.pdf
old school proving even stock motors react well to throttle body upgrades. Off topic but for all the non believers.
08-30-2008, 09:24 AM
#123
!! UNCONFIRMED EMAIL !!
Join Date: Sep 2007
Posts: 1,305
Re: Predict JD's high CR beater's dyno power
Originally Posted by PhilStubbs
JD, I am using the d15b head so that will probably lessen the quench, but might be better than a standard forged piston only in terms of quench.
Tough guy, my understanding of quench is to shape the piston and combustion chamber to force the fuel to stay near the plug. It will keep the plug cooler and reduce detonation. While rod length is important for quench actually working, it doesn't really do anything to change quench.
So, can anyone confirm what I said or just tell me I'm full of ----. That's the idea I got from what I read, I may have miss-understood.
Tough guy, my understanding of quench is to shape the piston and combustion chamber to force the fuel to stay near the plug. It will keep the plug cooler and reduce detonation. While rod length is important for quench actually working, it doesn't really do anything to change quench.
So, can anyone confirm what I said or just tell me I'm full of ----. That's the idea I got from what I read, I may have miss-understood.
08-30-2008, 05:54 PM
#124
3.0 BAR
Join Date: Jun 2006
Posts: 2,651
Re: Predict JD's high CR beater's dyno power
Originally Posted by t_cel_t
the way i understand it is imagine the old school kidney shaped chambers in the 2 valve heads. the cylinder is round so there is some area that will tight up against the piston at tdc. that area is measured as the quench distance. it forces the mixture towards the plug so that the mixture doesn't have to start at the plug and burn all the way to the edge of the cylinder. the theory behind singh grooves in the quench area will help direct the flame out to the edge of the piston so that little bit of mix over there will be burned, because there will always be a small amount of mix in that area because the distance cant be 0, you have to account for metal distortion and expansion.
09-01-2008, 03:10 AM
#126
3.0 BAR
Join Date: Jun 2006
Posts: 2,651
Re: Predict JD's high CR beater's dyno power
Originally Posted by bense
to whoever was wanting the dome cc of the gx piston, i used alegbra a while ago and came up with a 4.63cc number.
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