Below are pictures of what 1100 rwhp will do to a shortblock without billit caps and ARP hardware. You can see the rod bearings are in perfect condition, while the main bearings have been eating away. Luckily I had an oberg filter on the car that i monitored after each time I drove the car.
This engine has 3000 miles in it making 730rwhp but did not show any wear until the turbo went on. About 80 dyno pulls between 800-1100 rwhp with 10 being over 1000rwhp coupled with 13 runs at the 1/4 mile @ max power and 400 miles of light highway driving produced these results.
The bearings lasted a little while, but they would have surely spun if left any longer. The crank will need some polishing up as well.
Luck has nothing to do with it. There is a reason why I check the oil filters periodically. With this much power you have to keep an eye on things. I will keep a set or two of main bearings here on the shelf and change those when needed. At least that can be done with the engine in the car.
Do you think it would have help to install the teflon coated bearings and is 1100 the magic number for having the billet caps? Do you thing this would have happened at 950 ot 1000?
Obviously the more power the more the main caps will walk. I didn't have any problems @ 7XX rwhp supercharged. The problem occured after the turbo went on and I began making more power. My closest guestimate is around 900 rwhp on a turbocharged car (800-850 supercharged) the stock caps and bolts are not going to cut it.
And yes as GRCFORCE said they can be changed while in the car. I looked at doing this instead of taking the engine completly out. However since I cannot live with less than 1000rwhp that would have only been a temporary bandaid.
Could you save those bearings for me ? I believe a little sand paper and a small fill and I'll be good for another 70k
Can't do that Tony, I think I'll coat them with JB Weld to smooth them up a bit and slap them back in. Gotta build them up not file them down if they will make to 70K.
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