should i do a main support??

**blkp42e** · 01-24-2008, 03:15 PM

had issues with my last head bolt, so i am pulling the motor out to get it off. and going to install cam that way too, will make it easier. while i have the motor out, should i do a main support and windage tray while i am at it?

will the main support be a big help in keeping my block together nearing the 500whp mark?

**Pure Stock** · 01-24-2008, 03:53 PM

Originally Posted by blkp42e

had issues with my last head bolt, so i am pulling the motor out to get it off. and going to install cam that way too, will make it easier. while i have the motor out, should i do a main support and windage tray while i am at it?

will the main support be a big help in keeping my block together nearing the 500whp mark?

Windage trays are nice. The main support is not designed to keep the block together. They are designed to help prevent main cap walk. The block can still split from the lifter valley to the timing cover area even with the main support installed. At best, it's a band-aid.

**blkp42e** · 01-24-2008, 04:41 PM

so don't waste my money?

Originally Posted by Pure Stock

Windage trays are nice. The main support is not designed to keep the block together. They are designed to help prevent main cap walk. The block can still split from the lifter valley to the timing cover area even with the main support installed. At best, it's a band-aid.

**Pure Stock** · 01-24-2008, 04:54 PM

Originally Posted by blkp42e

so don't waste my money?

IMO, quality machine work, attention to detail in assembly, and having the tune spot on helps extend the life to a certain degree.

There are some examples of stock blocks that last for numerous seasons and they throw everything at them except the kitchen sink. Then there are examples that give way @ 450ish to the tires.

It's a gamble. My example utilizes a untouched 1993 stock short block that sees 7,000 rpm on the big end. No girdle here. Not getting pounded on every weekend though.

If I were to do a 332-347, say from D.S.S. I would include a girdle on a piece like that.

**Rodeheaver's** · 01-24-2008, 05:17 PM

the thing to krrp in mind with a main girdle is you must get the block reline honed with the girdle torqued on the block..

**94Cobra** · 01-24-2008, 08:56 PM

Originally Posted by Rodeheaver's

the thing to krrp in mind with a main girdle is you must get the block reline honed with the girdle torqued on the block..

Tim is dead on. I just had my 347 apart after only 5,000 miles and all of the bearings were down to copper because we put a girdle on without a line hone. I was on the fence about whether or not to pull my engine, but I definetley am glad I did.