Those damn rods! but wait what about the crank?
#31
No, I have used these for years in sprint cars,winston west motors as well as really high rpm drag engines, the oil system provides more than enough presure/volume at lower rpm to stand the .0005-.001 out of round condition. At high rpm the bearing is now round, with the proper .0025-.003 clearance all the way around (this clearance is a number left up to the engine builder, I am just giving a example) Years ago we used to "egg" shape the rod bores to give a little more clearance at the parting lines,this kind of did the same thing.
But IMHO if you are building a true 10,000 rpm motor it is not going to last forever anyway, so better to change bearings and be safe.
But IMHO if you are building a true 10,000 rpm motor it is not going to last forever anyway, so better to change bearings and be safe.
#32
Originally Posted by DERBOOST
But IMHO if you are building a true 10,000 rpm motor it is not going to last forever anyway, so better to change bearings and be safe.
#33
Originally Posted by topgun
Yes, 100%, the thing that bugs me is this, once you open the engine why not do it RIGHT?
It always was a great pleasure to build and tune a motor for a guy who really was willing to push the limit and also to accept the result of putting a motor that close to the edge and not ***** when she came apart. I always said its at its limit when it crosses the finish line with a new class record and spits the rods out at the same time... (well at least in running top alcohol)
#34
Originally Posted by DERBOOST
well I can only speak for my own experience of owning a race engine shop, but its one reason, Budget. ie, I know a new dry sump system is better, but it's oh, $7500.00 or so. Now the car owner wants new heads to give him another 20 hp. I really think he needs a new dry sump, but he wants the mods for power first.....ahhhh.... now I'm in it, the old oil system works OK and he wants the power......do I turn down the job??? Well I would, but he probably will then just go down the street and get his new heads anyway. So its always a tradeoff. Look at when nitrous first came out, TONS of engine failure, fault of the nos kit? Nope, just slap it on your stock engine and woopee !!! +200 horse, well till it goes "boom".
It always was a great pleasure to build and tune a motor for a guy who really was willing to push the limit and also to accept the result of putting a motor that close to the edge and not ***** when she came apart. I always said its at its limit when it crosses the finish line with a new class record and spits the rods out at the same time... (well at least in running top alcohol)
It always was a great pleasure to build and tune a motor for a guy who really was willing to push the limit and also to accept the result of putting a motor that close to the edge and not ***** when she came apart. I always said its at its limit when it crosses the finish line with a new class record and spits the rods out at the same time... (well at least in running top alcohol)
#35
CJV,
you amaze me!
Is your motor at Protomotive now or just parts of it?
New York Joe,
Are you going to have a homecoming party for you turbo ? I would suggest
streamers and the whole works. It has been a long time coming, now get out on the local freeway and pull some people!! We want stories!
Marty K.
you amaze me!
Is your motor at Protomotive now or just parts of it?
New York Joe,
Are you going to have a homecoming party for you turbo ? I would suggest
streamers and the whole works. It has been a long time coming, now get out on the local freeway and pull some people!! We want stories!
Marty K.
#36
Originally Posted by topgun
With all the discusion about the engines being blown lately, did anybody consider the crank as the culprit? We all know the rods are a weak link, but the crank may be at fault! NO? I mean if the crank fails to flow the right amount of oil for cooling & lubrication, then there go's the bearing, then the rods. The damage could be mounting & mounting, you wont know until boom! . I played it safe & went with a GT3RS bad boy.......tom
In my experience... if you have a bad bearing, you know it. I've lost two engines to bad bearings and both made horrendous noises once the bearing was out. What I'm trying to say is, you should know you have problems long before 'boom' occurs.
#37
Originally Posted by dr_sharp
Isn't it the oil pumps job to flow oil?
In my experience... if you have a bad bearing, you know it. I've lost two engines to bad bearings and both made horrendous noises once the bearing was out. What I'm trying to say is, you should know you have problems long before 'boom' occurs.
In my experience... if you have a bad bearing, you know it. I've lost two engines to bad bearings and both made horrendous noises once the bearing was out. What I'm trying to say is, you should know you have problems long before 'boom' occurs.
It's a combo of both! Example if you have a high fow fuel pump, you need bigger lines to flow properly. same concept! I lost two engines to bearings & they both went at cruising. That means the damage was done before hand. You were lucky you heared the bearing before the knocking started it's not a good feeling . Again who is the culprit? ...tom
#39
Originally Posted by WOODTSTER
I have One question??
Is VR Alex's Crank a stock factory crank??
If it is then it has been VERY WELL tested (the way Alex drives his car).
MK
Is VR Alex's Crank a stock factory crank??
If it is then it has been VERY WELL tested (the way Alex drives his car).
MK
#40
Originally Posted by Divexxtreme
Yep. Stock cams and stock crank. Todd already told me that the 996TT does not need a new crank. The stock one is perfectly fine.
#41
Originally Posted by WOODTSTER
New York Joe,
Are you going to have a homecoming party for you turbo ? I would suggest
streamers and the whole works. It has been a long time coming, now get out on the local freeway and pull some people!! We want stories!
Marty K.
#42
Originally Posted by joetwint
Better hurry up,I might be cruising L.I. in a TT viper w/1400rwhp by then! I hope to see it soon.
Joe
Have you find a TT snake a yet. Or are you going to build one soon??
#44
Originally Posted by joetwint
Hey Vince,check out my garage thread in the garages section.I'm working on it.
And the blue sapphire ACR w/ TT is going to be quite a sleeprrrrrrr.
Go w/ Heffner!!
#45
Originally Posted by cjv
Now here is the crank for strength to 10,000+ rpm's. The journals have been reconfigured to 2.0" to fit NASCAR Oval bearings.
And the rods.
And the rods.