crank support ?

I don't run a crank support and I have been having main bearing issues only on the center mains front and rear are good? Should I buy oneThis is the only thing I can think of to solve the problem, I run approx 40 pound boost' tired of buying bearings. Looking for some opinions from the one's who know what the heck there doin.

 

Bearing prob.

Dont know about the support, but I would check line bore and crank for straightness Don

 

I think it's a line bore problem..crank support is great for the front bearing and for the front of the snout of the crank...check line bore..Dave
www.myspace.com/daveloweswr

 

keith black makes a side oiler kit

 

I had fresh line bore new mains and new crank 6 passes in and it happened I even turned it way down and lowered shift points don't know what else to do?

 

What kind of motor is this that you are haveing issues with.

 

The main brgs. that take the most abuse are number 2 and 3 because the combustion pressure pushing down on the crank and the blower drive pulley pulling up on the crank nose.A support should help your problem.

 

It's a 496 bbc 4.25 stroke 14-71 hh

 

A bearing support should take care of this problem typical of a chevy. I had issues with 2 and 3 mains on my old chevy deal and when I finally spun number 2 main I went to a crank support and never ever had an issue.

 

I had a bearing problem with the main bearings on a BBC till I installed a crankshaft windage tray. The tray keeps the oil from being suspended in the upper part of the block and from the oil being thrown into the valley. I could see on the data system that the oil pressure would drop in the burn off and a 3rd of the way down the track. Hope this helps and it can't hurt. Chuck

 

We used to run BBC's LF HH 14's.
When we didn't have a handle on our fuel systems we would ruin the main bearings at 12 runs.
We would also knock the porcelain out of the spark plugs, spit head gaskets out, etc.

 

Thank you all for the help and ideas I'm gonna give both the support and a windage a shot.

 

check your private messages!

 

crank support

rbs supercharger sells a nice set up it is a knock off of the rcd I bought one a couple of years ago no problems and a lot cheaper