Dyno vs Track Validation
#1
Dyno vs Track Validation
I was reading gm high tech performance's article on lids for the 3rd time and noticed that the lid (MTI) that did the best on the track (measured in MPH) did the worst on the dyno! And we are talking about well over 5hp which I would have no problem calling a dyno fudge factor. Presuming they kept the temps relatively normalized... what gives?
#2
10 Second Club
iTrader: (9)
Join Date: Jan 2004
Location: Daytona Beach, FL
Posts: 560
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by GIGAPUNK
I was reading gm high tech performance's article on lids for the 3rd time and noticed that the lid (MTI) that did the best on the track (measured in MPH) did the worst on the dyno! And we are talking about well over 5hp which I would have no problem calling a dyno fudge factor. Presuming they kept the temps relatively normalized... what gives?
#3
TECH Fanatic
iTrader: (3)
Join Date: Nov 2001
Location: Wichita Falls,TX
Posts: 1,032
Likes: 0
Received 0 Likes
on
0 Posts
A lid works by directing air into the intake channel. No dyno can duplicate the amount of air which will be flowing through a lid on a drag strip pass. On the dyno, the car, and the lid, are stationary with only a cheap fan blowing on the front of the car.
#4
Banned
iTrader: (1)
Join Date: Nov 2004
Location: North of Seattle
Posts: 2,057
Likes: 0
Received 0 Likes
on
0 Posts
Well considering that the change is roughly a little over a 1% difference I wouldn't worry too much about the lower hp numbers. I didn't even bother reading that article. Way too many variables to determine a clear winner.
Buy whatever lid is on sale at the time.
Nate
Buy whatever lid is on sale at the time.
Nate
Trending Topics
#11
10 Second Club
iTrader: (22)
Join Date: Mar 2006
Location: Northwest side of Chicago
Posts: 3,677
Likes: 0
Received 2 Likes
on
2 Posts
All lids are the same,im sure the stocker would do just fine also. But who has a stock lid anymore. The lid is the first thing you do when you buy one of these cars.
#18
TECH Fanatic
A lid is a lid is a lid is a lid is a lid is a lid is a lid is a lid is a lid is a lid is a lid is a lid...
My SLP lid kicks ***, tho
Where exactly does this thread belong?
My SLP lid kicks ***, tho
Where exactly does this thread belong?
#19
TECH Fanatic
iTrader: (1)
Join Date: Aug 2005
Location: Galveston, TX
Posts: 1,202
Likes: 0
Received 0 Likes
on
0 Posts
i think we can all agree that any lid is an improvement over the stock lid, which was DESIGNED to restrict airflow and slow down the camaro, so the corvette could be rated a high hp.
#20
9-Second Club
iTrader: (1)
Well, I found on my '98 WS6 A4, after tuning the stock lid and aftermarket lid dyno pulls were within 1 to 1.5 rwhp, A-B-A testing. They lean the car @ WOT, and stock tuning normally being too rich, that seems to be where the gains appear to come from. May be different with a modified engine, but that is what I found with my stocker. All 8 pulls were between 322 & 324 rwhp, and if you didn't know which pulls were with which lid, you could not tell by looking at the graphs. Made 2 pulls with the stock lid, 4 pulls with the LS1 Motorports lid, then 2 pulls with the stock lid. Finally gave it to a local kid I try to help some, who thought he really needed to have one. Kept the stocker on mine.