material for exhaust valves
06-15-2006, 08:21 AM
#11
0.0 BAR
Join Date: Apr 2004
Posts: 0
Re: material for exhaust valves
Originally Posted by Joseph Davis
The stem is made out of a friction-friendly stainless alloy, the head out of a temperature-friendly alloy, and the head is spun very very very fast, brought into contact with the stem for a split instant so it friction-welds itself on + released from whatever fixture is spinning it.
06-15-2006, 10:21 AM
#12
1.0 BAR
Thread Starter
Join Date: Dec 2005
Posts: 391
Re: material for exhaust valves
no need to hate guys, I was just asking for sake of conversation, I was interested in what the advantages/dissadvantages would be,and I thank everyone who answered
I am not trying to overbuild my engine,just maybe here and there try a few new ideas. If anyone does have any sudjestions of things that would be beneficial for building the engine other than teh obvious common things,please post them up or PM me, I just wanna do a little "outta the box thinking" and even if things never do get put into action it is certainlly educational to look into each one
I am not trying to overbuild my engine,just maybe here and there try a few new ideas. If anyone does have any sudjestions of things that would be beneficial for building the engine other than teh obvious common things,please post them up or PM me, I just wanna do a little "outta the box thinking" and even if things never do get put into action it is certainlly educational to look into each one
06-15-2006, 11:11 AM
#13
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Join Date: Feb 2003
Posts: 0
Re: material for exhaust valves
Originally Posted by sailman
no need to hate guys
Originally Posted by sailman
If anyone does have any sudjestions of things that would be beneficial for building the engine other than teh obvious common things,please post them up or PM me
Like, first off, set a goddamn power goal so the parts you need become apparent.
06-15-2006, 11:55 AM
#15
3.0 BAR
Join Date: Sep 2003
Posts: 3,751
Re: material for exhaust valves
http://www.honda-tech.com/zerothread?id=1622667
Don't be a wuss, go all out, scroll down about mid-page!
Don't be a wuss, go all out, scroll down about mid-page!
06-15-2006, 11:59 AM
#16
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: material for exhaust valves
Stock crank is fine to over 1000.
Rods, pistons are borderline. The problem is thermal loading and detonation on an LS as you approach knock limit, typically 350 whp. Light "inaudible" detonation places stress on ringlands, forces the rod down very hard momentarily so that the oil film parts between crank and upper rod bearing.
Water injection will cool the piston and combustion chamber greatly (aluminum is half as strong at 600 deg F as at room temperature, much less at actual combustion temps, you strengthen the piston by WI). It also adds a good bit of knock limit, typically 15% for 50% water:fuel ratio. I'd say you stick with WI.
I'd also steer you to a set of cams and valvetrain, if you want to be different. Nothing like a little camming at idle, followed by turbo whine, to make the idiots do a double take.
Rods, pistons are borderline. The problem is thermal loading and detonation on an LS as you approach knock limit, typically 350 whp. Light "inaudible" detonation places stress on ringlands, forces the rod down very hard momentarily so that the oil film parts between crank and upper rod bearing.
Water injection will cool the piston and combustion chamber greatly (aluminum is half as strong at 600 deg F as at room temperature, much less at actual combustion temps, you strengthen the piston by WI). It also adds a good bit of knock limit, typically 15% for 50% water:fuel ratio. I'd say you stick with WI.
I'd also steer you to a set of cams and valvetrain, if you want to be different. Nothing like a little camming at idle, followed by turbo whine, to make the idiots do a double take.
06-15-2006, 06:34 PM
#17
3.0 BAR
Join Date: Apr 2003
Posts: 2,579
Re: material for exhaust valves
Originally Posted by Joseph Davis
Hot air like Heywood/Taylor LIE about? If hot air where all that + a bowl of grits, we would spend millions of dollars constructing nuclear reactors to heat air, not water, to turn turbines. But, we don't. The expansion of wet steam is about as good as it gets for practical applications.
Heywoods book was a pain in the *****
06-15-2006, 06:34 PM
#18
0.0 BAR
Join Date: Dec 2002
Posts: 0
Re: material for exhaust valves
Originally Posted by JK_Motorsports
http://www.honda-tech.com/zerothread?id=1622667
Don't be a wuss, go all out, scroll down about mid-page!
Don't be a wuss, go all out, scroll down about mid-page!
06-15-2006, 10:58 PM
#19
0.0 BAR
Join Date: Feb 2003
Posts: 0
Re: material for exhaust valves
Originally Posted by fork
Heywoods book was a pain in the *****
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