How high to spin Vortec 4.3

Reply Subscribe

Thread Tools

Search this Thread

May 23, 2006 | 09:31 PM

FILE

Thread Starter

TECH Senior Member

iTrader: (5)

Joined: Apr 2002

Posts: 7,276

Likes: 1

From: Truck Heaven

How high to spin Vortec 4.3

To what rpm can you safely spin the 99+ 4.3 vortec?

May 24, 2006 | 08:08 PM

bluecajun5.3

11 Second Truck Club

iTrader: (31)

Joined: Jan 2005

Posts: 5,861

Likes: 0

From: Breaux Bridge, LA

i've rode in a couple of 4.3's and i can say that i feel them stop pulling around 5300 to 5500.

May 25, 2006 | 10:29 AM

Rhino79

9 Second Club

iTrader: (7)

Joined: May 2005

Posts: 3,127

Likes: 1

From: Cabot, AR

I'm with cajun, they make their peak at about 4600 RPM stock so 5000-5200 would be a good shift point.

May 25, 2006 | 01:58 PM

blk_blazer00

Launching!

Joined: Aug 2005

Posts: 235

Likes: 0

From: Orange Park, FL

May 25, 2006 | 02:47 PM

zippy

TECH Veteran

Joined: Sep 2003

Posts: 4,534

Likes: 3

From: Las Vegas, NV

The bottom end is good to about 6200.

Jun 9, 2006 | 05:37 AM

03sierraslt

Admin

iTrader: (22)

Joined: Jul 2004

Posts: 19,007

Likes: 221

From: Western PA

Ya I had one some time ago and I used to beat the crap out of it, I used to take it to 6000 all the time. Not saying this was utilizing its power curve effectivly but the engine never skipped a beat. Maybe a little valve float...

Jul 13, 2006 | 04:08 AM

nekkidhillbilly

Staging Lane

Joined: Apr 2004

Posts: 73

Likes: 0

dads redlines at 5500 rpm from the factory

How high to spin Vortec 4.3

How high to spin Vortec 4.3

Trending Topics