Stock 1999 Firebird Formula Dyno
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On The Tree
Joined: Dec 2014
Posts: 131
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From: Mesa, AZ
Stock 1999 Firebird Formula Dyno Here's my dyno results for my firebird. My engine was stock down to a paper non-SLP air lid. The car has 45,000 miles on it and had the original spark plugs in it. I just had my swapped my rear end gears from 2.73 to 3.23 after a carrier barrier started going bad and decided to replace my noisy torsen carrier at the same time, but that shouldn't change hp reading anyway. It was running 91 octane gas and Pennzoil Ultra 5w-30 and a Wix paper filter, those are the only mods 
. It was about 90 degrees and 35% humidity In stock tune it made 290 RWHP and 315 torque to the ground, it is an auto. They ran 3 tests for each tuning sequence to get accurate readings. I had them do a basic dyno tune which included a bump in timing and a slight air fuel ratio change and adjust my shift points too. After tuning it made 308 RWHP and 330 torque to the ground. I gained 18hp and 15 torque. Do these numbers seem pretty reasonable for a stock LS1? The peak power seems to be around 5,500 rpm. I had it done at a reputable shop called Dyno Comp and their dyno is an electromagnetic type. It definitely pulls harder then before by a fair amount. I figure this is one of the closest to factory stock for a dyno run baseline as it gets for a healthy running LS1.
. It was about 90 degrees and 35% humidity In stock tune it made 290 RWHP and 315 torque to the ground, it is an auto. They ran 3 tests for each tuning sequence to get accurate readings. I had them do a basic dyno tune which included a bump in timing and a slight air fuel ratio change and adjust my shift points too. After tuning it made 308 RWHP and 330 torque to the ground. I gained 18hp and 15 torque. Do these numbers seem pretty reasonable for a stock LS1? The peak power seems to be around 5,500 rpm. I had it done at a reputable shop called Dyno Comp and their dyno is an electromagnetic type. It definitely pulls harder then before by a fair amount. I figure this is one of the closest to factory stock for a dyno run baseline as it gets for a healthy running LS1. Last edited by McGinnis; Sep 12, 2015 at 10:36 AM.
