99 2V Dyno'd
Elder User
Joined: Feb 2007
Posts: 805
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From: South Bend, IN
Yeah especially after my tuner gave me estimated numbers of 230 horse and 530 ft lbs. lol. They had me run in third gear. It was my first time on a dyno and didn't know how hard I could roll into the throttle without it coming out into second gear. That coulda had something to do with it too.
Mike, when you dyno what gear do you have the vehicle run in?
Mike, when you dyno what gear do you have the vehicle run in?
Postmaster
Joined: Oct 2006
Posts: 4,171
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From: SE Texas
Yeah especially after my tuner gave me estimated numbers of 230 horse and 530 ft lbs. lol. They had me run in third gear. It was my first time on a dyno and didn't know how hard I could roll into the throttle without it coming out into second gear. That coulda had something to do with it too.
Mike, when you dyno what gear do you have the vehicle run in?
Mike, when you dyno what gear do you have the vehicle run in?
Dyno pulls MUST be done in the trans in a 1:1 ratio(3rd with a 4R100,4th with a manual) to prevent the numbers being skewed. The torque converter MUST be locked to prevent the numbers being skewed from an unlocked torque converter.
JL
Elder User
Joined: Feb 2007
Posts: 805
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From: South Bend, IN
Those were the estimates my LiveWire was giving me. Thanks for confirming that 3rd was the proper way to run. I am new to the whole dyno thing and didn't know for sure.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
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From: Long Island USA
I looked, and you are putting out a few more horses than one of the dyno runs that Mike did, so ... about on target, I think, eh?
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Former Vendor
Joined: Sep 2000
Posts: 2,627
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From: South Carolina
HI dew the thunder
Runs are usually in 3rd gear (1:1) with torque converter lock, so no down shift occurs. A dyno is a tool and only that, I try not to focus on just a number, Before and After numbers in controlled conditions are what we should focus on.
Runs are usually in 3rd gear (1:1) with torque converter lock, so no down shift occurs. A dyno is a tool and only that, I try not to focus on just a number, Before and After numbers in controlled conditions are what we should focus on.
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 421
From: Long Island USA
VERY true. Different locations, different dynos, different trucks even, make it an apples to oranges comparison.
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Former Vendor
Joined: Sep 2000
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From: South Carolina
Morning V10'ers... Felt Froggy this morning.
Sorry for delay on this. Here are the runs with headers.
I got the original worn out tires back and did runs 285/75/16, I also added SB intake and FM70 to truck as well vs last runs.
Hope you enjoy its taken a lot of work to do these runs over the last 4-5 months with trying to keep conditions consistent as much as possible...
Sorry for delay on this. Here are the runs with headers.
I got the original worn out tires back and did runs 285/75/16, I also added SB intake and FM70 to truck as well vs last runs.
Hope you enjoy its taken a lot of work to do these runs over the last 4-5 months with trying to keep conditions consistent as much as possible...
Senior User
Joined: Mar 2007
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Mike,
On the last run what do you think made the most gain, Headers, FM70, or CAI? I would think FM70 made the least change, followed by the CAI while the headers made the most gain. How is the fit of the Hedman headers?
On the last run what do you think made the most gain, Headers, FM70, or CAI? I would think FM70 made the least change, followed by the CAI while the headers made the most gain. How is the fit of the Hedman headers?
Elder User
Joined: Feb 2007
Posts: 805
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From: South Bend, IN
Mike, could there have been so much difference in the tests that your numbers show 27 horse more than mine with nearly the same mods? Plus I noticed that you ran your tests on the 87 tune whereas mine were run on the 93 tune. Something seems off.
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Former Vendor
Joined: Sep 2000
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From: South Carolina
I was suprised in numbers myself and did another run right after with same results. Keep in mind different dynos and I have trans programmed to lock torque converter in 3rd. I only did tests with 87 octane gas.
I think the main point to take away from last run is there are gains with headers. I think the intake and fm70 helped the headers. Also, on the headers we are using the Hedman ypipe as we had to remove the spd to install headers. Fit on Hedman headers are good, the ypipe of theirs is a little to close (tight not good) to the trans on the cross over.
Last edited by 5 Star Tuning; Jun 7, 2009 at 06:41 PM. Reason: forgot word