Are there any good kits to convert 2 bolt main to 4 bolt?

Reply Subscribe

Thread Tools

Search this Thread

12-16-2005, 07:29 AM

#11

bluecajun5.3

11 Second Truck Club

iTrader: (31)

Join Date: Jan 2005

Location: Breaux Bridge, LA

Posts: 5,861

Likes: 0

Received 0 Likes on 0 Posts

who ever informed you doesn't know what they are talking about. a 2 bolt will work fine for your application.

Reply Like

12-16-2005, 10:34 AM

#12

YenkoST

TECH Fanatic

iTrader: (11)

Join Date: Feb 2005

Location: GA

Posts: 1,549

Likes: 0

Received 2 Likes on 2 Posts

Quote:

Originally Posted by Silent Thunder

I was told that the block came out of a 94 chevy. I checked the #'s on the block and went to mortek.com to verify. I want to go to a 4 bolt because I was informed that you must have a 4 bolt to build a 383 stroker. Is this true? Someday I plan to add a charger but that will be a ways off. My goal is to have about 375-400rwhp, all motor. Who knows what it will be after the charger install.

I have a 383 stroker on a 2 bolt. I have AFR heads, average cam, HSR system....etc making about 440fwhp and 470ft lbs. As long as you don't race it every day it will be fine however, if this is a drag engine 4bolt would be better and if you plan to charge it....4 bolt would be better as well. Just make sure you get good rods in it!!

Reply Like

12-16-2005, 12:54 PM

#13

Bill Reid

Moderator

iTrader: (14)

Join Date: Mar 2003

Location: Chandler, AZ

Posts: 2,327

Likes: 0

Received 1 Like on 1 Post

Quote:

Originally Posted by Silent Thunder

Well there you have it. Forced Induction = 4 bolt... those pesky future plans always seem to be an important part of the decision equation taking place now. FWIW, I have seen 2 bolt main blocks pushed with forced induction... magging showed fatal cracking of the main webs...

Reply Like

12-16-2005, 07:27 PM

#14

vanillagorilla

TECH Veteran

iTrader: (1)

Join Date: Apr 2004

Location: Arizona Bay

Posts: 4,038

Likes: 0

Received 0 Likes on 0 Posts

450fwhp with a 150shot on a 2 bolt main with a girdle. All is well and if anything is going to fail it sure as hell won't be a main. Rings, pistons and rods will definatley go first.

Think about this, you have and old block, that you're going to spend $500 having it bored, honed, decked etc. Another couple hundred to get it converted to a 4 bolt. You might as well get an aftermarket block that's ready to go with the potential for more cubes.

Reply Like

12-22-2005, 06:44 PM

#15

AintNoHo

Launching!

Join Date: Dec 2005

Location: San Diego,CA

Posts: 230

Likes: 0

Received 0 Likes on 0 Posts

Quote:

Originally Posted by brian4.8

not being funny but bluecajun is right, I have never seen a crank fall out of a block!!! 2 or 4 bolt

The newer LS engines have 6 bolt mains. It's not that the crank will actually fall out, it's that if the crank is able to move even slightly you can have spun bearings and additional stress on the rest of the rotating assembly. Nothing is written in stone it's just fairly cheap insurance on an expensive engine build. P.S. Go to Summitracing.com enter mil-11150

Last edited by AintNoHo; 12-25-2005 at 02:03 AM. Reason: P.S.