TheLion
Well-Known Member
- Thread starter
- #1
I realized on the Ford Performance site they give you a crude dyno graph to illustrate the differences between the stock PCM software and Ford Performance. They also list the actual gains at certain RPM's and ranges.
Several people were speculating that the Ford Perofrmance tune would be nearly identical to the Livernois 91 Stage 3v7 tune due to both of their close relationships with Ford and past joint R&D efforts.
The Ford Performance graph in the link is at the crank, not the wheels (the stock car does not put down 310hp at the wheels, but at the crank which is how most manufacturers list power): FP Dyno
So their peak crank HP is listed at 335 WITH their CAI. At a 15% drive train loss that's about 285 whp.
Now 91 octane generally nets about a 2% loss in power over 93 octane on the same car (see all of Cobb's data on their Stage 1, 2 and 3 which the list the gains percentage wise). Typically 2 octane rating buys you 1 maybe 2 degrees of timing.
So 317whp * 0.98 = 311 whp. Note that the LMS 317 whp is on a bone stock car and their dyno which tends to push lower numbers than the more common dynojet (aka they call it the heart breaker dyno).
There's definitely an edge with Livernois 91 Octane Stage 3v7 tune over the FP tune. BUT you don't have the warranty you do with the FP tune and you don't get a CAI (which you need to buy separately). So it would appear that they are not quite as close as we though even though they may make their power gains via the same alterations (primarily through timing and tables only, as opposed to also increasing boost as with Cobb and other tunes).
Several people were speculating that the Ford Perofrmance tune would be nearly identical to the Livernois 91 Stage 3v7 tune due to both of their close relationships with Ford and past joint R&D efforts.
The Ford Performance graph in the link is at the crank, not the wheels (the stock car does not put down 310hp at the wheels, but at the crank which is how most manufacturers list power): FP Dyno
So their peak crank HP is listed at 335 WITH their CAI. At a 15% drive train loss that's about 285 whp.
Now 91 octane generally nets about a 2% loss in power over 93 octane on the same car (see all of Cobb's data on their Stage 1, 2 and 3 which the list the gains percentage wise). Typically 2 octane rating buys you 1 maybe 2 degrees of timing.
So 317whp * 0.98 = 311 whp. Note that the LMS 317 whp is on a bone stock car and their dyno which tends to push lower numbers than the more common dynojet (aka they call it the heart breaker dyno).
There's definitely an edge with Livernois 91 Octane Stage 3v7 tune over the FP tune. BUT you don't have the warranty you do with the FP tune and you don't get a CAI (which you need to buy separately). So it would appear that they are not quite as close as we though even though they may make their power gains via the same alterations (primarily through timing and tables only, as opposed to also increasing boost as with Cobb and other tunes).
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...why are we posting JDM tune dynos on a thread that was comparing the Ford Performance 91 tune to the Livernois 91 tune? Unless I missed something here. I thought the reason JDM posted this was because they had a FP 91 tune in hand and tested it on one of their shop cars with their hardware mods.
