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Dyno Forum Discuss Dyno Tuning, and Post those Graphs Here! |
03-03-2008, 02:09 PM
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#1
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Name: Abrannan19
Title: NOBAMA 09-12
Status: Not Here
Join Date: Dec 2006
Location: Jacksonville,FL
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Posts: 3,034
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horsepower/torque questions
this is pretty much about the 6.0..this is not started to say one tuner is better then the other so please dont turn it into that..
My question is how can diffrent trucks that are almost the same configuration SRW F250 F350 close to same tires size make diffrent numbers..
For instance:
Bryan made 790 hp and 1286 lb ft.
Frankie made 757 hp and 1192 lb ft. Doug made 66 less hp but 199 more lb ft then Frankie
Doug made 691hp and 1391 lb ft. Doug made 99 less hp but 105 more lb ft the Bryan
why the difference in numbers for torque? ONCE AGAIN..I am not doubting or questioning..its just something that has stumped me..anybody know?
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03-03-2008, 02:20 PM
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#2
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Name: Six_leaker
Title: Too Much Time
Status: Not Here
Join Date: Mar 2007
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Posts: 477
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It's all in how efficient the tune is. It’s Tuning Timing & air flow will make a difference.
I can tell you right now without looking at Doug's dyno sheet that his TQ #'s dropped off to sharp where the other 2 held there TQ a little longer.
If you ever wonder HP & TQ cross over at close to 5200-5300 RPM's after that HP will be above TQ.
__________________
Warren Diesel
1300hp fuel only 1758hp spray 6.0l
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03-03-2008, 02:23 PM
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#3
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Name: HushpowerGuy
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Feb 2008
Location: Beautiful Athol, Idaho
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Posts: 224
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Your question is the very reason that we, Hushpower and Flowmaster, do not publish our own dyno #s. I can put ten similar trucks on the dyno and make ten different #s. It can come down to diff temp, trans temp, tire temp, ...... basically everything. Tire pressure is also a big one on the dyno...
__________________
Phil
'01 Dirtymax, Edge, Hush 4", 6" Procomp, 35" MT MTZs
'85 CJ-7, 550hp, 200 shot NOS, 39" Krawlers, dual Hushs...
'94 Dodge Wrecker, 12Vstocker, 4" Hush
'98 INT. 4700 Rollback, 7.3, Gutless, 4" Hush
'08 Dodge Dually CCLB, 6.7, Stock and NEW
'78 Chevy, 8" lift, 406, show only!
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03-03-2008, 02:28 PM
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#4
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Name: haloman
Title: Too Much Time
Status: Not Here
Join Date: Aug 2007
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Posts: 7,876
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Did they all dyno on the same dyno same day?
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03-03-2008, 02:36 PM
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#5
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Name: HushpowerGuy
Title: Comp Diesel Sponsor
Status: Not Here
Join Date: Feb 2008
Location: Beautiful Athol, Idaho
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Posts: 224
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yepper.
It is hard enough to make a completely repetable run with one truck... to do it with multiples is a huge pain in the *ss.
There are just too many variables.
__________________
Phil
'01 Dirtymax, Edge, Hush 4", 6" Procomp, 35" MT MTZs
'85 CJ-7, 550hp, 200 shot NOS, 39" Krawlers, dual Hushs...
'94 Dodge Wrecker, 12Vstocker, 4" Hush
'98 INT. 4700 Rollback, 7.3, Gutless, 4" Hush
'08 Dodge Dually CCLB, 6.7, Stock and NEW
'78 Chevy, 8" lift, 406, show only!
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03-03-2008, 02:47 PM
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#6
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Name: alexlaughlin
Title: Cool
Status: Not Here
Join Date: Jan 2008
Location: stephenville, tx
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Posts: 605
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Every truck is different. Even our module that the customer cant change, all get different dyno #'s. Its just different trucks like different things...
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