4.3L differences

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4.3L differences #733440 06/26/06 01:39 AM

Joined: Jan 2004

Posts: 100

South Boston, Va, USA

JohnW

Wheeler

Can anybody tell me the difference between the 4.3 W, X and Z engines?

2002 Trooper S 5spd, cone filter, Ranchos, Modified for 2WL

Re: 4.3L differences [Re: JohnW] #733441 06/27/06 11:33 AM

Anonymous

Unregistered

The 4.3 Z is the TBI style engine.
The 4.3 X and W are the ôVortecö style (multi port/ sequential fuel injection) engine. The W is rated at 10 more hp and 10 more lb ft of torque than the X engine. The difference comes from a different camshaft and programming.

Re: 4.3L differences #733442 06/27/06 02:12 PM

Joined: Oct 2004

Posts: 6,332

In the beer cooler

52degrees

Trail Leader

It's kind of gone back and forth over the years. The W started out as a CPI engine, where all cylinders were fueled at once and has since been morphed into an sfi system. The X motors that I've seen lately are more powerful than the last batch of W's, and lack EGR. I'd have to look up the Z motor. The last Z motor I've seen is a 5.3l v-8.

GM is more hooked on alphabet soup than the government. <img src="/forums/images/graemlins/rolleyes.gif" alt="" />

1990 Montero RS (In pieces... for now)

KG6VNX

Re: 4.3L differences [Re: 52degrees] #733443 06/30/06 04:07 PM

Joined: Jan 2004

Posts: 100

South Boston, Va, USA

JohnW

Wheeler

Thanks, I am looking for a marine rebuild candidate, this will help.

2002 Trooper S 5spd, cone filter, Ranchos, Modified for 2WL

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