Fujita Dyno Chat using Dynojet for my IS-F
03-06-08, 10:06 AM
#1
Fujita Dyno Chat using Dynojet for my IS-F
Fujita was doing a intake test fit for my IS-F, so they dynod the car stock and then with the prototype intake. The intake only have 1-2 hp gains which is not worth it...haha...so I hope in the future they have an intake company that can get significant gains on the intake without losing lower end horse power but gaining high end horse power...
Note: Fujita dynoed the car at 5th gear and the fuel/air ratio runs rich based upon their dynojet numbers and another dynojet number when I took my car to dyno extreme last weekend..
I wonder what difference would it be if the car was dynoed at 6th gear since it is 1:1? 
Note: Fujita dynoed the car at 5th gear and the fuel/air ratio runs rich based upon their dynojet numbers and another dynojet number when I took my car to dyno extreme last weekend..
I wonder what difference would it be if the car was dynoed at 6th gear since it is 1:1?
03-06-08, 12:59 PM
#2
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sorry numbers hopefully Fujita can do a little me R&D. Lets see what gains the other companies come out with ie: LMS, K&N, F-sport line, Injen, AEM etc. Anyone heard of these companies testing an intake for the IS-F?
03-06-08, 02:59 PM
#5
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Don't expect a lot. It won't happen on the intake side.
03-06-08, 03:45 PM
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On the IS250 / IS350 we use 4th gear for the DYNO, which is closest to 1:1 ratio..
As you now know.. on the IS-F its 6th gear...
Joe Z
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03-06-08, 03:46 PM
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03-06-08, 04:02 PM
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^^ Sounds about right... But not sure how good this base number is...
The extensive R&D I have done on the IS250 & IS350 were showing a 15% & 14% drivetrain loss to the wheels.. respectively..
The Dyno test done on one of the prototype IS-F's by Automobile Mag. showed 333 rwhp..
Which would mean an approx 20% loss to the wheels.
416hp / 20% => 333 Rwhp approx.
Joe Z
The extensive R&D I have done on the IS250 & IS350 were showing a 15% & 14% drivetrain loss to the wheels.. respectively..
The Dyno test done on one of the prototype IS-F's by Automobile Mag. showed 333 rwhp..
Which would mean an approx 20% loss to the wheels.
416hp / 20% => 333 Rwhp approx.
Joe Z
Last edited by Joe Z; 03-06-08 at 04:06 PM.
03-06-08, 04:34 PM
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I don't agree with Automobile's dyno and I think it was flawed.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
03-06-08, 09:44 PM
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I don't agree with Automobile's dyno and I think it was flawed.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
However, with a 15% drivetrain loss, the DYNO numbers would be right around 354 rwhp... possible.. maybe??
I hope to have an accurate & correct base dyno test performed very soon on an IS-F..
*cough, cough... Phillip*
Joe Z
03-07-08, 09:06 AM
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I don't agree with Automobile's dyno and I think it was flawed.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
Also lobux, CrazyMPG's dyno was not done in 6th gear which would have been optimal. Given how efficient the 8 speed in the IS-F is, I expect no more than 15% drivetrain loss, exceptional for a RWD automatic.
I think you're terribly optimistic about what a gear change will do to dyno results. 17% isn't all bad, it's just not in the same league as a proper manual.