89 stock rods

Reply Subscribe

Thread Tools

Search this Thread

Apr 28, 2014 | 04:34 PM

89C4TunePort

Thread Starter

Intermediate

Joined: Apr 2013

Posts: 27

Likes: 0

From: IN

89 stock rods

rebuilding my 89 l98 motor and I had heard that the stock rods were forged? any input? thanks.

Apr 29, 2014 | 01:13 AM

Hooked on Vettes

Melting Slicks

Joined: Aug 1999

Posts: 2,240

Likes: 41

From: Baltimore, MD USA

They are forged but the service manual doesn't mention the type of material. Hope you can read sideways.

Apr 30, 2014 | 01:41 PM

Race Prepared

Burning Brakes

Joined: Dec 2006

Posts: 1,090

Likes: 80

From: Burleson Texas

Sweet!

Apr 30, 2014 | 03:29 PM

Tom400CFI

Team Owner

Joined: Aug 2004

Posts: 21,543

Likes: 3,216

From: Park City Utah

All SBC rods were/are have been forged.

Apr 30, 2014 | 03:41 PM

rklessdriver

Safety Car

Joined: Apr 2005

Posts: 3,624

Likes: 431

From: Dale City VA

Quote:

Originally Posted by Tom400CFI

All SBC rods were/are have been forged.

Starting in 1995 SBC's started getting the Powdered Metal (PM) fractured cap connecting rods.

You will find PM connecting rods in 1995-1997 LT1 and all 1996 LT4's.

Also they were used in the L31 Vortec engines and all ZZ4, ZZX and ZZ383 crate engines.

Will

Apr 30, 2014 | 03:47 PM

Tom400CFI

Team Owner

Joined: Aug 2004

Posts: 21,543

Likes: 3,216

From: Park City Utah

Yep. Still forged though.

May 3, 2014 | 09:08 PM

Hot Rod Roy

Safety Car

Joined: Sep 2004

Posts: 3,953

Likes: 550

From: Mission Viejo CA

I have a copy of the Motor Vehicle Manufacturers Association (MVMA) specification for the '84 Corvette (L83 engine). It shows the con rods are 1037 or 1038 steel, with a weight of .338 kg. (.855 lb) ea., but doesn't list the type of manufacturing. This, of course, may or may not be the same for your '89.