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valve train
by
smoken u
on 28 Jul, 2009 09:20
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just wondering on m,y current build im looking to sp[in around 6000 to 7000 rpm is the stock vavletrain able to handle this rpm??
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#1
by
Rabbit on Roids
on 28 Jul, 2009 09:23
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oh hell yea, you ever looked at it? its got tough dual spring setups from the factory tho. but uh, good luck spinnin it 7k.
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#2
by
smoken u
on 28 Jul, 2009 09:36
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lol im gonna try my hardest to. I was looking at the dual valve sprinfgs but just wanted to make sure, just becasue i ususally work on cummmins, and you have to upgrade vavle springs on them just to get 4000 rpm outta them.
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#3
by
Black Smokin' Diesel
on 28 Jul, 2009 09:42
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The valvetrain and crankshaft will take 7000 rpm easy but the fuel pump will start to skip above 6000 rpm.
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#4
by
smoken u
on 28 Jul, 2009 11:33
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now is that skip just caused by lack of fuel or spinning too fast for the weights inside of it??
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#5
by
burn_your_money
on 28 Jul, 2009 12:09
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Spinning too fast for the plunger to return to the bottom of it's stroke
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#6
by
smoken u
on 28 Jul, 2009 12:17
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interesting, is there anyway this problem could be overcome at all??
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#7
by
8v-of-fury
on 28 Jul, 2009 16:44
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Don't spin it over 6000 rpm
There will be virtually zero usable Torque or Power above that anyhow. 6000 is faster then you will ever need it to spin
Why do you wish to spin to 7k?
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#8
by
smoken u
on 28 Jul, 2009 18:43
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well i really have no particular reason to spin 7000 rpm, yeah it would be interesting to do so adn one hell of an adventure especially to try to engineer the pump to do so, nothing wrong with tyring to achieve somthing, but think for a moment in the real world, what if you miss a shift, and go say from 5th to second you would see an increase of revs far past what what you could fuel. not saying that i miss shifts, but it does and can happen to the best of us.
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#9
by
8v-of-fury
on 28 Jul, 2009 18:52
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well i really have no particular reason to spin 7000 rpm, yeah it would be interesting to do so adn one hell of an adventure especially to try to engineer the pump to do so, nothing wrong with tyring to achieve somthing, but think for a moment in the real world, what if you miss a shift, and go say from 5th to second you would see an increase of revs far past what what you could fuel. not saying that i miss shifts, but it does and can happen to the best of us.
Hey man if you could engineer it to work it would be bad ass! Do you dump the clutch whilst down shifting? a miss from 5th to 2nd would probably detonate something ?? maybe. Can you make it work to 7k? it would be awesome if you could make it actually make power up there too. but i think then you not only run in to problems with fueling.. but you can't get enough air in.. and out
those heads were never designed to flow that much LOL
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#10
by
theman53
on 28 Jul, 2009 19:02
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I don't know. The guy named AKI is building one to do just that. Right around 7,000 RPM. The ideas that come from that guy are amazing and I bet he will have it going soon.
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#11
by
8v-of-fury
on 28 Jul, 2009 19:15
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AKI is insane.. I have read many of his threads. Pure Genius that guy
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#12
by
RabbitJockey
on 28 Jul, 2009 20:04
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i wonder if an inline pump would do the trick, but i guess they could be worse
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#13
by
RabbitJockey
on 28 Jul, 2009 20:06
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#14
by
smoken u
on 29 Jul, 2009 08:12
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thats a fancy looking pump almost like a bosch p series fopund on cummins 4bt's
