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.

 

Yes, 100%, the thing that bugs me is this, once you open the engine why not do it RIGHT? Done! I would prefer to leave the bolt on stuff for a later date if money is an issue & build a solid motor! Later just add the finishing touches. Look! for most of us money doesn't grow on trees, you just have to do the important stuff first. I've learned this the hard way, DO IT RIGHT ONCE! you save so much in the long run.......tom

 

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)

 

I get you! @ least you as the builder give them a choice & warn them! Then theres nobody to blame but themselves! look these are not cheap motors, your looking @ 25k for a motor , plus-plus & its stock....tom

 

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.

 

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.

 

 

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

 

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.

 

Scott, I have heard the same thing from several people in the know.I just heard that you want to keep it below 7500 rpms to be safe,but i guess Alex's car would prove that theory wrong!Remember guys you can break anything if you don't know what your doing.

 

Homecoming?No,not my style,I am a little more low key than that.Now the local freeway is more my style,but the competition around here has gotten much quicker.Gonna have to invest in the big gun,if you know what I mean.

 

Joe

Have you find a TT snake a yet. Or are you going to build one soon??

 

Hey Vince,check out my garage thread in the garages section.I'm working on it.

 

Wow what a garage. You're more nuts than I thought. Perfect ...
And the blue sapphire ACR w/ TT is going to be quite a sleeprrrrrrr.
Go w/ Heffner!!

 

Hey those look familiar! I need to go see Armando soon to pick up a few I dropped off there a while ago