Conflicting dyno numbers?

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Apr 16, 2004 | 03:47 PM

#11

XLR8NSS

Adkoonerstrator

iTrader: (4)

Joined: Nov 2001

Posts: 21,436

Likes: 3

From: Deep in the seedy underworld of Koonerville

Quote:

Originally Posted by Cmarsh93z

I just dynoed a stock 2000 GMC , 5.3 with 100k on the clock. 244rwhp before tuning, 253 after tuning...286 torque. Peaked around 5600 rpm! Just a data point for ya!

Chris

I've noticed in my EFILive logs that my 2000 100K+ mile 5.3L seems to peak around 5500-5600 also. MAF flow rises until then where it starts to drop ever so slightly up to the shift point somewhere in the 6000rpm range.

Apr 16, 2004 | 05:02 PM

#12

Black Blown 02

12 Second Truck Club

Joined: Oct 2002

Posts: 1,677

Likes: 0

From: Salt Lake City, Utah

Quote:

Originally Posted by onequick5.3

I have noticed that several companies chasis dyno numbers seem to conflict with each other. Hypertech's numbers for a 2000 GM 2wd is 256. However, JBA header's numbers is 198; JBA didn't say that it was a two or four wheel drive. So which numbers should I believe? What does a stock 2wd Silverado put down on a chasis dyno?

I saw that JBA dyno. They dyno'd in 3rd gear and only ran it to the speed limiter. So the peak # is only at 4500 rpm or something like that.