Crankshaft
02-07-2007, 06:45 PM
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Re: Crankshaft (accord-h22)
I dont think its limits have ever been reached, so i say 3000hp.
But in all honesty, i dont think anyone has ever broken a crank before. But there have been 1000hp H22 drag cars out there.
But in all honesty, i dont think anyone has ever broken a crank before. But there have been 1000hp H22 drag cars out there.
02-08-2007, 06:00 AM
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Re: Crankshaft (alterdcreations)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alterdcreations »</TD></TR><TR><TD CLASS="quote">I have seen the carnage of a broken crank before. i dont think it has anything to do with hp.</TD></TR></TABLE>
it has alot to do w/ hp. especially if it is already stressed/weak do to high mileage in the first place.
it has alot to do w/ hp. especially if it is already stressed/weak do to high mileage in the first place.
02-08-2007, 06:31 AM
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Re: Crankshaft (98vtec)
for example, the h23 crank that i am talking about. it came out of a stock h23 engine that ran great w/o any problems. that engine had close to 130k on it before removing the crank.
i had the crank magnufluxed to chech for cracks before using it in my new motor. it checked out fine. no cracks showed up.
after completing my new motor and tunning it made around 250 whp at that time. made a few passes at the track and then the crank broke while coming out of the water box as the tires started to hook.
tore it all back apart and had a couple different machine shops look at the crankshaft. they noticed right away why it had broken. there was a weak spot inside the metal that did not show up during magnafluxing due to magnafluxing ony showing the surface condition of the crank. to see this weak spot before hand i would have had to x-ray the crank. the small crack inside the metal had been there for a long time, it was stained dark and the area where the crank had finished breaking was nice and shiny.
i spoke w/ a couple pro engine builders about this and was told the same thing. make sure when building a high hp engine you start w/ a fresh (new) crank to avoid this problem. and also run the proper damper for the size motor as well.
i had the crank magnufluxed to chech for cracks before using it in my new motor. it checked out fine. no cracks showed up.
after completing my new motor and tunning it made around 250 whp at that time. made a few passes at the track and then the crank broke while coming out of the water box as the tires started to hook.
tore it all back apart and had a couple different machine shops look at the crankshaft. they noticed right away why it had broken. there was a weak spot inside the metal that did not show up during magnafluxing due to magnafluxing ony showing the surface condition of the crank. to see this weak spot before hand i would have had to x-ray the crank. the small crack inside the metal had been there for a long time, it was stained dark and the area where the crank had finished breaking was nice and shiny.
i spoke w/ a couple pro engine builders about this and was told the same thing. make sure when building a high hp engine you start w/ a fresh (new) crank to avoid this problem. and also run the proper damper for the size motor as well.
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02-08-2007, 07:31 AM
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Re: Crankshaft (alterdcreations)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alterdcreations »</TD></TR><TR><TD CLASS="quote">their are people putting 600+wheel hp thru the same crank that your 250whp broke</TD></TR></TABLE>
not w/ 130k on them. most guys that use the h23 crank for a race motor will buy a new crank straight from honda. but usually they go aftermarket for that stroke because the h23 cranks dont hold up.
not w/ 130k on them. most guys that use the h23 crank for a race motor will buy a new crank straight from honda. but usually they go aftermarket for that stroke because the h23 cranks dont hold up.
02-08-2007, 07:39 AM
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Re: Crankshaft (alterdcreations)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alterdcreations »</TD></TR><TR><TD CLASS="quote">it has more to do with shock
and age, not hp</TD></TR></TABLE>
shock, not hp?
do you know what you're saying?
Let me remind you guys of something, horsepower is <u>NOT</u> a physical quality in any way, it is some calculation we use to represent how well an engine carries torque to higher rpm. Its all about torque. So its about torque, torque will break that crank. As would not having a proper damper on it.
I suppose dropping the clutch on slicks does some fourth-hand damage to the crank, after it shocks the **** out of the diff, that shocks the **** out of the countershaft, that shocks the **** out of the mainshaft, some of the shock is transferred back to the crank.
and age, not hp</TD></TR></TABLE>
shock, not hp?
do you know what you're saying?
Let me remind you guys of something, horsepower is <u>NOT</u> a physical quality in any way, it is some calculation we use to represent how well an engine carries torque to higher rpm. Its all about torque. So its about torque, torque will break that crank. As would not having a proper damper on it.
I suppose dropping the clutch on slicks does some fourth-hand damage to the crank, after it shocks the **** out of the diff, that shocks the **** out of the countershaft, that shocks the **** out of the mainshaft, some of the shock is transferred back to the crank.
02-08-2007, 07:39 AM
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Re: Crankshaft (Missing Gears)
also a stock h23 crank is not the crank of choice for high power applications as i stated earlier. racers will go w/ an aftermarket crower 95mm crank when making big hp due to the weakness of the stock h23 crank.
if your interested in finding out more about this, i suggest you give the Braunnings a call. they have more experience than ANYONE when it comes to h series motors.
if your interested in finding out more about this, i suggest you give the Braunnings a call. they have more experience than ANYONE when it comes to h series motors.
02-08-2007, 07:42 AM
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Re: Crankshaft (mgags7)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 »</TD></TR><TR><TD CLASS="quote">
shock, not hp?
do you know what you're saying?
Let me remind you guys of something, horsepower is <u>NOT</u> a physical quality in any way, it is some calculation we use to represent how well an engine carries torque to higher rpm. Its all about torque. So its about torque, torque will break that crank. As would not having a proper damper on it.
I suppose dropping the clutch on slicks does some fourth-hand damage to the crank, after it shocks the **** out of the diff, that shocks the **** out of the countershaft, that shocks the **** out of the mainshaft, some of the shock is transferred back to the crank.</TD></TR></TABLE>
the amount of shock needed to break a crankshaft comes from increasing the size of the motor to make more power. the power allows enough "shock" to break the crank. if the motor wasnt making as much power, than it wouldnt twist the crank enough to break it when the tires hook.
shock, not hp?
do you know what you're saying?
Let me remind you guys of something, horsepower is <u>NOT</u> a physical quality in any way, it is some calculation we use to represent how well an engine carries torque to higher rpm. Its all about torque. So its about torque, torque will break that crank. As would not having a proper damper on it.
I suppose dropping the clutch on slicks does some fourth-hand damage to the crank, after it shocks the **** out of the diff, that shocks the **** out of the countershaft, that shocks the **** out of the mainshaft, some of the shock is transferred back to the crank.</TD></TR></TABLE>
the amount of shock needed to break a crankshaft comes from increasing the size of the motor to make more power. the power allows enough "shock" to break the crank. if the motor wasnt making as much power, than it wouldnt twist the crank enough to break it when the tires hook.
02-08-2007, 07:49 AM
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Re: (mgags7)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mgags7 »</TD></TR><TR><TD CLASS="quote">I'm just referencing the loose use of the word "power"
hp isn't physically measurable, its the torque that is</TD></TR></TABLE>
i agree
hp isn't physically measurable, its the torque that is</TD></TR></TABLE>
i agree
02-08-2007, 08:17 AM
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Re: (Missing Gears)
i was just woundering because i want to run some spray on my all moto h22 its gonna have 300 + whp and i runin the stock crank that has been lightned and balanced i want to run at least 75 shot
02-08-2007, 08:24 AM
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Re: (accord-h22)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accord-h22 »</TD></TR><TR><TD CLASS="quote">i was just woundering because i want to run some spray on my all moto h22 its gonna have 300 + whp and i runin the stock crank that has been lightned and balanced i want to run at least 75 shot</TD></TR></TABLE>
From what I've read people have sprayed all day on OE blocks, but only 50 shots. I would think 75 should be fine if you had it balanced. I say if that bitch is out get it cryofrozen.
But that's not at all necessary you should be okay but again it's nitrous so you always run the risk ya know. Do some searching tho peeps do 50's all day. Also what do you mean by "lightened"?
From what I've read people have sprayed all day on OE blocks, but only 50 shots. I would think 75 should be fine if you had it balanced. I say if that bitch is out get it cryofrozen.
But that's not at all necessary you should be okay but again it's nitrous so you always run the risk ya know. Do some searching tho peeps do 50's all day. Also what do you mean by "lightened"?
02-08-2007, 09:35 AM
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Re: (alterdcreations)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accord-h22 »</TD></TR><TR><TD CLASS="quote">wanting to know how much hp can a stock crank hold</TD></TR></TABLE>
this was the question that was asked
the answer is @#$% hp
if the crank is in great shape then 600+hp as to what the turbo guys are running
as to missing gears
the power didnt break your crank as much as the change in load did
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Missing Gears »</TD></TR><TR><TD CLASS="quote"> the crank broke while coming out of the water box as the tires started to hook. </TD></TR></TABLE>
this was the question that was asked
the answer is @#$% hp
if the crank is in great shape then 600+hp as to what the turbo guys are running
as to missing gears
the power didnt break your crank as much as the change in load did
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Missing Gears »</TD></TR><TR><TD CLASS="quote"> the crank broke while coming out of the water box as the tires started to hook. </TD></TR></TABLE>
02-08-2007, 11:59 AM
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Re: (alterdcreations)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alterdcreations »</TD></TR><TR><TD CLASS="quote">
as to missing gears
the power didnt break your crank as much as the change in load did
</TD></TR></TABLE>
ok genious, if it was the tires hooking that broke the crank, why dont you see alot more broken cranks w/ stock engines making stock power?????????????
FACT-people run slicks all day long w/ stock h23s and dont break cranks.
as to missing gears
the power didnt break your crank as much as the change in load did
</TD></TR></TABLE>
ok genious, if it was the tires hooking that broke the crank, why dont you see alot more broken cranks w/ stock engines making stock power?????????????
FACT-people run slicks all day long w/ stock h23s and dont break cranks.
02-08-2007, 12:07 PM
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Re: (98vtec)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec »</TD></TR><TR><TD CLASS="quote">i dunno bout you, but breaking cranks isnt something i hear about often.....</TD></TR></TABLE>
thats what im saying. tires hooking (changing load) doesnt break a crank unless you are making enough power to twist the crank enough for it to break, period.
thats what im saying. tires hooking (changing load) doesnt break a crank unless you are making enough power to twist the crank enough for it to break, period.