2001 durango missing at stand still revs. (appox. 4200 rpms)
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Joined: Jun 2005
Posts: 14,228
Likes: 19
From: Riverton, UT
Dude glad to see a fellow engine builder but what in the hell are you revving that motor to those RPM's in the first place? Anyone who builds (good) motors would know that unless built with obvious components like 4 bolt mains and rigid valve train (or double spring) that V8 motors (as regular OHV cam motors) should stay under 3500 and under torque of the drive train, not to mention as they hit those RPM's it shifts out. To simply sit and hold 3500+ RPM's for no reason other that messing with the motors is simply idiotic. Most builders would know about things like floating valves as well other reasons which you are probably doing at 5000 RPM anyway because the motor is well out of its power band anyway.
Can they run up there for short burst, Yes, but as you do extreme ware is going to happen from shear heat and friction without lubricating correctly especially in an OEM built motor like these. If you want a race car then you shouldn't have purchased a Durango or you need to build you a motor to handle your adverse conditions.
Now I don’t care if you are 55 years old or otherwise, this is not a motor built to handle those kinds of conditions. I’m sure you built your old 360’s and so forth but today’s are a little bit different then the old school motors. I mean hell, you used to get like 100K miles out of those old motors and now to new technology the newer 360’s can get 300k. You simply aren’t comparing apples to apples.
Now if you want to blow your motor then that’s up to you either way…..IDK. I just don’t see the purpose to ever even want to rev your motor to those levels even to find out why or what would happen if you did. Now to find a miss, well that’s different. But even then you wouldn’t rev a motor like that, so I just simply do not understand what you would want to accomplish by revving an OEM motor that high in the first place.
Can they run up there for short burst, Yes, but as you do extreme ware is going to happen from shear heat and friction without lubricating correctly especially in an OEM built motor like these. If you want a race car then you shouldn't have purchased a Durango or you need to build you a motor to handle your adverse conditions.
Now I don’t care if you are 55 years old or otherwise, this is not a motor built to handle those kinds of conditions. I’m sure you built your old 360’s and so forth but today’s are a little bit different then the old school motors. I mean hell, you used to get like 100K miles out of those old motors and now to new technology the newer 360’s can get 300k. You simply aren’t comparing apples to apples.
Now if you want to blow your motor then that’s up to you either way…..IDK. I just don’t see the purpose to ever even want to rev your motor to those levels even to find out why or what would happen if you did. Now to find a miss, well that’s different. But even then you wouldn’t rev a motor like that, so I just simply do not understand what you would want to accomplish by revving an OEM motor that high in the first place.
Last edited by hydrashocker; Jun 10, 2010 at 02:09 PM.
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Registered User
Joined: Jun 2010
Posts: 24
Likes: 0
From: Billings,Montana
Dude glad to see a fellow engine builder but what in the hell are you revving that motor to those RPM's in the first place? Anyone who builds (good) motors would know that unless built with obvious components like 4 bolt mains and rigid valve train (or double spring) that V8 motors (as regular OHV cam motors) should stay under 3500 and under torque of the drive train, not to mention as they hit those RPM's it shifts out. To simply sit and hold 3500+ RPM's for no reason other that messing with the motors is simply idiotic. Most builders would know about things like floating valves as well other reasons which you are probably doing at 5000 RPM anyway because the motor is well out of its power band anyway.
Can they run up there for short burst, Yes, but as you do extreme ware is going to happen from shear heat and friction without lubricating correctly especially in an OEM built motor like these. If you want a race car then you shouldn't have purchased a Durango or you need to build you a motor to handle your adverse conditions.
Now I don’t care if you are 55 years old or otherwise, this is not a motor built to handle those kinds of conditions. I’m sure you built your old 360’s and so forth but today’s are a little bit different then the old school motors. I mean hell, you used to get like 100K miles out of those old motors and now to new technology the newer 360’s can get 300k. You simply aren’t comparing apples to apples.
Now if you want to blow your motor then that’s up to you either way…..IDK. I just don’t see the purpose to ever even want to rev your motor to those levels even to find out why or what would happen if you did. Now to find a miss, well that’s different. But even then you wouldn’t rev a motor like that, so I just simply do not understand what you would want to accomplish by revving an OEM motor that high in the first place.
Can they run up there for short burst, Yes, but as you do extreme ware is going to happen from shear heat and friction without lubricating correctly especially in an OEM built motor like these. If you want a race car then you shouldn't have purchased a Durango or you need to build you a motor to handle your adverse conditions.
Now I don’t care if you are 55 years old or otherwise, this is not a motor built to handle those kinds of conditions. I’m sure you built your old 360’s and so forth but today’s are a little bit different then the old school motors. I mean hell, you used to get like 100K miles out of those old motors and now to new technology the newer 360’s can get 300k. You simply aren’t comparing apples to apples.
Now if you want to blow your motor then that’s up to you either way…..IDK. I just don’t see the purpose to ever even want to rev your motor to those levels even to find out why or what would happen if you did. Now to find a miss, well that’s different. But even then you wouldn’t rev a motor like that, so I just simply do not understand what you would want to accomplish by revving an OEM motor that high in the first place.
Thanks for the reply,
CALIBER 308