VHR + FD Gear Ratio upgrades - 3.9 and 4.08

shabarivas · 09-15-2009, 01:12 PM

Quote:

Originally Posted by shabarivas

So correct me if I am wrong - but the SRM basically functions using a look up table... IE: if your speed is X in gear A... then when you shift to gear A-1 rev to RPM R... so.... if you were to now change your gears to higher FD... you will be at a higher RPM for lower speeds - so wouldnt this cause the SRM to rev to a lower RPM making for some interesting shifts???

Umm no answer? Or do you just not know about this? I would imagine this would keep a LOT of people from buying gears for this car if the issue exists....

wstar · 09-24-2009, 12:32 PM

Quote:

Originally Posted by shabarivas

Umm no answer? Or do you just not know about this? I would imagine this would keep a LOT of people from buying gears for this car if the issue exists....

My assumption (but I don't know for sure) is that SRM works off of gear and RPM alone, as that makes the most sense and is simplest to implement anyways. Assuming that's the case, changin rear diff ratios and/or tire/wheel sizes won't screw up SRM. If a rear diff ratio does screw up SRM, then so would any aggressive change in tire diameter, and that would be just plain silly on Nissan's part and people would've noticed it by now.

Mike · 09-24-2009, 01:11 PM

Quote:

Originally Posted by wstar

My assumption (but I don't know for sure) is that SRM works off of gear and RPM alone, as that makes the most sense and is simplest to implement anyways. Assuming that's the case, changin rear diff ratios and/or tire/wheel sizes won't screw up SRM. If a rear diff ratio does screw up SRM, then so would any aggressive change in tire diameter, and that would be just plain silly on Nissan's part and people would've noticed it by now.

and since I'm running track tires that are 1" shorter than stock and it still works fine, I believe you are right.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem after some Audio Upgrades	209Z	Audio & Video	1	06-13-2009 01:16 PM
6th Gear Syncros going after 5K.	Scribe	Engine & Drivetrain	50	05-22-2009 02:54 PM
first to second gear..	DJcuetip	Nissan 370Z General Discussions	3	02-06-2009 10:42 PM
Top Gear?	370z2	Nissan 370Z General Discussions	1	02-03-2009 11:43 PM
Close ratio gears?	tvfreakazoid	Engine & Drivetrain	24	01-30-2009 03:44 PM