2 questions, Both engine related

[BoondocK5]

1 Can a SBC, 2 bolt main, be "made" into a 4 bolt main?

2 Can a 6.2 Litre GM diesel, be turbo'd reliably?

everyone of my friends can neither confirm or deny either of these questions.
Just thinking outloud.

 

[USSkoval]

Yes and yes.

 

[BoondocK5]

Yes and yes.

Care to expound?

Bueller...Bueller...

 

[tRustyK5]

Banks has been selling turbo kits for the 6.2 for about as long as those engines have been around...

There are aftermarket kits to add two more mian cap bolts. Most often they're splayed (not straight up and down like stock) The splayed 4 bolt set-up is quite a bit stronger than the factory 4 bolt block set-up.

Rene

 

[ChrisPerry]

http://www.superchevy.com/technical...0306_milodon_small_block_main_caps/index.html
Article shows 2-4 bolt conversion.

 

[Corey 78K5]

Banks has been selling turbo kits for the 6.2 for about as long as those engines have been around...

There are aftermarket kits to add two more mian cap bolts. Most often they're splayed (not straight up and down like stock) The splayed 4 bolt set-up is quite a bit stronger than the factory 4 bolt block set-up.

Rene

What Rene said. I'll just add that by splaying the outer bolts/studs they go into the meat of the block. That is why they are stronger. The newer LS engines are this way as well as two bolts coming in from the side of block making them 6 bolt mains. Only other engine I know of like that is the 426 Hemi.

 

[USSkoval]

Care to expound?

Bueller...Bueller...

Sorry, I just knew that it could be done. I've never done either myself, so I didn't want to give out bad information. I figured others would be more in-the-know, luckily they are

 

[82355]

Making a 2 bolt into a 4 bolt is a waste of time/money on most pickup engines.

Martin

 

[BoondocK5]

Making a 2 bolt into a 4 bolt is a waste of time/money on most pickup engines.

Martin

Care to expound on that statement?

 

[82355]

Okay, it takes time and money to make a 2 bolt block into a 4 bolt block. Most pickup engines will never need the added strength of a 4 bolt block. Adding 4 bolt mains to a pickup engine would then be a waste of time and money.

Martin

 

[Merv]

Okay, it takes time and money to make a 2 bolt block into a 4 bolt block. Most pickup engines will never need the added strength of a 4 bolt block. Adding 4 bolt mains to a pickup engine would then be a waste of time and money.

Martin

Unless your beating your truck like a red headed step-child.

 

[Chevy305]

I hear 2 bolt mains are good to about 500hp.

 

[BoondocK5]

I hear 2 bolt mains are good to about 500hp.

I definitely would NOT run that kind of HP on 2 bolt main. I like my stuff to hold together for atleast a little while.

 

[82355]

There are lots of 500 horse, 2 bolt main, circle track engines across the country being beat relentlessly every weekend.

Martin

 

[BoondocK5]

I'm just saying that as a general rule I wouldn't run 500 horsies on a 2 bolt main block. It's just asking for long-run trouble.

I'm contemplating some very serious Cubic inches out of a 2 bolt smallblock I own right now. Thats why I asked about the 4 bolt main thing in the first place.
Thinking about 430 CID, 10:1 comp. roller cam, .525 lift, 270* duration, Dart 2 heads. Thats going to definitely need a 4 bolt main.

 

[82355]

I bet you could run that just fine with a 2 bolt block.

You say 430, so I assume you are going to use a 400 small block? A 2 bolt 400 is stronger than a 4 bolt 400 (which were only made from 1970-'72). If you are spending that much moeny, than yeah, installing a set of splayed 4 bolt main caps to #2, #3, and #4 would probably be a wise investment.

Martin

 

[82355]

For the 400.

http://www.summitracing.com/parts/ESP-C4103S/

For the 350.

http://www.summitracing.com/parts/ESP-C4102S/

Martin