GM Performance :: View topic - Rev limiters Whats the highest you've seen Vortec 305/350???

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Rev limiters Whats the highest you've seen Vortec 305/350???

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Hog

Joined: 11 Dec 2001
Posts: 4299
Location: 1997 Chev ECSB L31 350 1997 GMC Sierra SLE RCSB, Ontario

Rev limiters Whats the highest you've seen Vortec 305/350???

Who programmed it????

How high was it???

What was your shiftpoint???

How was the power up there?

I need hard facts here please guys.

Thanks a lot

Hog

Mon Jul 11, 2005 8:30 pm

AcIdBuRn83355

Joined: 10 Jul 2005
Posts: 4

me personally... i wouldnt suggest too far over the factory rev. limiter on a stock motor... considering you'll probably toss a rod at anything much over 5800-6000 rpm... or atleast cause some costly damage...

if your runnin the factory motor... not sure what the rev. limiter is at... but i wouldnt push it past around 5600-5700 rpm to be on the safer side...

just my opinion though... all depends on what your shooting for.

-AcId-

Mon Jul 18, 2005 6:27 pm

Hog

Joined: 11 Dec 2001
Posts: 4299
Location: 1997 Chev ECSB L31 350 1997 GMC Sierra SLE RCSB, Ontario

AcIdBuRn83355 wrote:
me personally... i wouldnt suggest too far over the factory rev. limiter on a stock motor... considering you'll probably toss a rod at anything much over 5800-6000 rpm... or atleast cause some costly damage...

if your runnin the factory motor... not sure what the rev. limiter is at... but i wouldnt push it past around 5600-5700 rpm to be on the safer side...

just my opinion though... all depends on what your shooting for.

-AcId-

Thanks Acid and welcome to the forum, I just wanted to know what the highest rev limits anyone has seen used on the early Vortecs. I may need some extended rpm range with a new cam.

Hog

Mon Jul 18, 2005 6:39 pm

Guest

Westers has my 3rd gear shift at 5500(I asked him to for testing purposes). I wouldnt recommend it on the stock intake. The intake and/or cam limit it to around 5400. It pretty much falls on its face after that. It takes forever to get to 5500. This is on a whippled setup,10psi,water injection, headers, stock heads.

After I get my Tunercat I plan on bring it back down to around 5200.

Mon Jul 18, 2005 6:44 pm

PSWired

Joined: 18 Sep 2001
Posts: 3533
Location: Annapolis, MD 1995 GMC Yukon, 6L80e, E85 5.3

Damn, you must be out west with some really long roads to be able to test out a 5500 RPM 3rd gear shift!

Mon Jul 18, 2005 7:21 pm

tahoe99

Joined: 18 May 2005
Posts: 147
Location: Tea, SD 99Tahoe 383,411, Hooker LT,EFILive, lots of stereo

Guest = Tahoe99(forgot to login!)

PSWired wrote:
Damn, you must be out west with some really long roads to be able to test out a 5500 RPM 3rd gear shift!

Whoops let me rephrase that, 2nd to 3rd gear shifts. Im not that crazy!

Iowa- Lots of backroads! Very Happy

Tue Jul 19, 2005 3:45 am

1998chevy1500

Joined: 27 Jun 2005
Posts: 131
Location: Bozeman, MT

Hog,

I don't know if you've seen this in your TunerCat files but it may be the reason why you cannot get it to rev past where ever it is stuck at.

Under Constants -> System Prameters is a two fuel cutoff settings. They are supposed to be for only when your VSS is bad but the names of them are "Fuel Cutoff Engine Speed (Bad VSS)" set @ 5600 and "Fuel Resume Engine Speed (Bad VSS)" set @5400

Good luck,

Conrad

Tue Jul 19, 2005 4:38 pm

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