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?
__________________
-Brice-
1999 V10 F250 SD XLT 4X4 4.30LS
18X9 XD Badlands, 285/65 Dune Grapplers, Doug Thorley Headers,
K&N, Chrome Grille, New headlights & corners, Bilsteins,
Clear Cab Lights, White Lightning bar, LED dome lights, SCT LiveWire
LED 3rd brake light, FM 40, SuperWinch hubs, LED Tails
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?
230/530-what's he smoking? You're not gonna see 500ft-lbs with a N/A 6.8L-much less 530ft-lbs.
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
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.
__________________
-Brice-
1999 V10 F250 SD XLT 4X4 4.30LS
18X9 XD Badlands, 285/65 Dune Grapplers, Doug Thorley Headers,
K&N, Chrome Grille, New headlights & corners, Bilsteins,
Clear Cab Lights, White Lightning bar, LED dome lights, SCT LiveWire
LED 3rd brake light, FM 40, SuperWinch hubs, LED Tails
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.
This is your '99 with only headers and a K&N?
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?
__________________
- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Warn hubs Volant CAI, eBay headers and y-pipe - 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
Mike, when you dyno what gear do you have the vehicle run in?
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.
Before and After numbers in controlled conditions are what we should focus on.
VERY true. Different locations, different dynos, different trucks even, make it an apples to oranges comparison.
__________________
- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Warn hubs Volant CAI, eBay headers and y-pipe - 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
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...
Mike, what headers are those? And you didn't change anything in the tune before and after the headers/muffler?
__________________
- art k. - Moderator for the Superduty, V10, and FE forums
'01 F250SD SC SB XLT V10 4x4 auto 3.73 Warn hubs Volant CAI, eBay headers and y-pipe - 5-star custom tunes on SCT X3
'97 Cougar XR7 30th Anniv Edition 4.6L
'74 F250 Highboy FE390 deceased! I've been wrong before, I'll be wrong again. Just wait and see.
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?
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.
__________________
-Brice-
1999 V10 F250 SD XLT 4X4 4.30LS
18X9 XD Badlands, 285/65 Dune Grapplers, Doug Thorley Headers,
K&N, Chrome Grille, New headlights & corners, Bilsteins,
Clear Cab Lights, White Lightning bar, LED dome lights, SCT LiveWire
LED 3rd brake light, FM 40, SuperWinch hubs, LED Tails
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.
Hi dew
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.
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