View Poll Results: What will be the IS-F final HP number
400-405
8
5.00%
405-410
7
4.38%
410-415
13
8.13%
415-420
25
15.63%
420-425
56
35.00%
Over 425, I was thinking like 600.....
51
31.88%
Voters: 160. You may not vote on this poll
What will be the IS-F hp?
10-02-07, 07:53 AM
#136
That is exactly what I did, but your number is different than mine. The equation is:
5.0 / 3.5 = 5.0L is 42.86% bigger than the 3.5 liter motor.
If you assume the same specs per liter, then the hp rating would be
1.4286 * 306 (IS350 rating) = 437 hp
437 hp is my guestimate from a previous post (using your reasoning). I'm not sure how you came up with 426 hp. Maybe if you don't round the liters the way I did, and use more exact numbers you get that number.
5.0 / 3.5 = 5.0L is 42.86% bigger than the 3.5 liter motor.
If you assume the same specs per liter, then the hp rating would be
1.4286 * 306 (IS350 rating) = 437 hp
437 hp is my guestimate from a previous post (using your reasoning). I'm not sure how you came up with 426 hp. Maybe if you don't round the liters the way I did, and use more exact numbers you get that number.
If the numbers come in less I`d say less compression. Higher I`d say more stroke, same compresson
Last edited by HKS350; 10-02-07 at 08:00 AM.
10-02-07, 11:37 AM
#138
Lexus Fanatic
Keep in mind that with more cylinders comes more parasitic power loss. One simply cannot apply the V6's hp/L ratio onto a V8, even with both having the same basic design and technology set.
10-02-07, 11:55 AM
#139
While you are correct that more cylinders means more parasitic loss, I think the estimate is probably accurate guessing that the performance gains on the UR will offset the loss...but that in itself too is hypothetical.
Come on Lexus, please!
10-02-07, 01:19 PM
#140
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10-02-07, 08:54 PM
#141
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Yes, I agree that the performance gains on the UR will offset the loss. As you said, all of this is hypothetical, but I'm still standing by my guestimate of approximately 437 hp. Only time will tell. Lexus needs to spill the beans. I'm very surprised that the power rating has not been leaked yet.
True, though consider the V8's high performance heads and whatever other performance modifications may be a part of the engine that we don't know about.
While you are correct that more cylinders means more parasitic loss, I think the estimate is probably accurate guessing that the performance gains on the UR will offset the loss...but that in itself too is hypothetical.
Come on Lexus, please!
While you are correct that more cylinders means more parasitic loss, I think the estimate is probably accurate guessing that the performance gains on the UR will offset the loss...but that in itself too is hypothetical.
Come on Lexus, please!
10-02-07, 08:59 PM
#142
Tech Info Resource
iTrader: (2)
At any rate, it is not at all unreasonable to take the 2GR-FSE's hp/liter and directly apply it to the 2UR-GSE.
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