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post #51 of 85 (permalink) Old 10-25-2018, 04:14 PM
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Has anyone ever compared the RWD vs AWD dynos. I would expect RWD to put more power down, but it seems that it's almost negligible.
You would think so, and that is typically the case. However, Nissan/Infiniti's AWD systems in recent years have been very efficient and from what I've seen the difference is negligible on these cars. If there is one, it's likely less than 10WHP stock.

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post #52 of 85 (permalink) Old 10-25-2018, 05:26 PM
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Is it easier to get out because the seat bottom is much higher from the ground than your GTR?
The height is less favorable, yes, but I think it's primarily the thigh bolsters. They're fairly tall. Awesome for when you're putting the car into a corner, though.
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post #53 of 85 (permalink) Old 10-26-2018, 06:11 AM
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When I did my dyno tune I put down 25 more hp and like 40 more tq then an AWD. A lot has changed from then though but I always thought the RWD cars had better dyno numbers.



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post #54 of 85 (permalink) Old 06-25-2019, 06:51 PM
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Originally Posted by RichE View Post
Has anyone ever compared the RWD vs AWD dynos. I would expect RWD to put more power down, but it seems that it's almost negligible.

You would still put out more on the dyno with RWD than AWD, although it doesn't matter if you're spinning at the stoplight while the AWD easily got the jump on you

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post #55 of 85 (permalink) Old 06-25-2019, 08:19 PM
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On the dyno the rollers spin differently front to rear, I think? Unlike on the road where all the power goes to the rear weels first unless they "slip" which I believe the dyno does, unless the front and rear rollers are linked somehow. Anyone know? A LSD helps on pavement for sure.

I got only about 3 feet of both rear weel spin on my new map "hit" today. Not sure if power went to the front wheel since it was so little rear weel spin. Under the bias threshold maybe?

Unless the rollers are linked the dyno will underestimate the power as there would be drive train loss vs pavement.

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post #56 of 85 (permalink) Old 06-25-2019, 09:32 PM
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On the dyno the rollers spin differently front to rear, I think? Unlike on the road where all the power goes to the rear weels first unless they "slip" which I believe the dyno does, unless the front and rear rollers are linked somehow. Anyone know? A LSD helps on pavement for sure.

I got only about 3 feet of both rear weel spin on my new map "hit" today. Not sure if power went to the front wheel since it was so little rear weel spin. Under the bias threshold maybe?

Unless the rollers are linked the dyno will underestimate the power as there would be drive train loss vs pavement.

On dirt with VDC off my car is a blast!
AWD system is automatically engaged at low-speeds and from a stop after which it tapers off and only engages as needed.

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post #57 of 85 (permalink) Old 06-26-2019, 09:36 AM
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AWD system is automatically engaged at low-speeds and from a stop after which it tapers off and only engages as needed.
I don't quite agree. Rear wheel bias. My rear wheels will turn b4 my fronts from a stop. Once they slip a bit I feel the front kick in. If AWD is active like you said this would not happen. Verified on wet/sandy/snow conditions. I'll look on the manual.

Still wondering about the dyno and clarification on if front and rear rollers are linked in any way. I doubt it. If they are not the dyno does not replicate power to the ground on pavement accurately. Just IMHO. @Avedis53
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post #58 of 85 (permalink) Old 06-26-2019, 09:43 AM
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AWD system is automatically engaged at low-speeds and from a stop after which it tapers off and only engages as needed.
From what Iíve always been taught at work, the AWD system in the Infinitis ONLY activates when slippage is detected in a tire, even in snow mode it doesnít automatically adjust to AWD, thatís only starting your car off in a higher gear to get traction, the second it detects negative conditions or wheel spin it will transfer 50% to front wheels.
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post #59 of 85 (permalink) Old 06-26-2019, 10:11 AM
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My tires show this too. Rears wear faster than my front. I now since I got my lift, rotate much more often.
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post #60 of 85 (permalink) Old 06-26-2019, 11:16 AM
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Originally Posted by JohnInNH View Post
I don't quite agree. Rear wheel bias. My rear wheels will turn b4 my fronts from a stop. Once they slip a bit I feel the front kick in. If AWD is active like you said this would not happen. Verified on wet/sandy/snow conditions. I'll look on the manual.

Still wondering about the dyno and clarification on if front and rear rollers are linked in any way. I doubt it. If they are not the dyno does not replicate power to the ground on pavement accurately. Just IMHO. @Avedis53
Just reporting what the SM for 2016+ models had written/graphed for the torque splits, it's possible it's inaccurate due to poor translation me and Avedis were discussing this a few weeks back
ourselves.

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From what Iíve always been taught at work, the AWD system in the Infinitis ONLY activates when slippage is detected in a tire, even in snow mode it doesnít automatically adjust to AWD, thatís only starting your car off in a higher gear to get traction, the second it detects negative conditions or wheel spin it will transfer 50% to front wheels.
That was the case for the G37x models to be sure but with the Q50 it appears they've revised the AWD programming so it engages in a more pro-active manner instead
of a re-active one. As I mentioned to John the SM seems to state other-wise.

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