ejj

iTrader: (5)

What RPM have you guys found is the best for the switchover point? I used 5000 RPM, but some of the NA guys (Neal and Dave) suggested 5300 RPM or so.

I haven't been on a dyno yet, but was wondering what you guys found as the best.

JAY25

iTrader: (38)

I just switched to 5100 feels good

Stephen Max

iTrader: (59)

I have mine set to 5300 rpm based on Neal and Dave's recommendations. When I dyno this winter I'll experiment a little.

ejj

iTrader: (5)

Either of you guys tried it at the track and played with the settings there?

Stephen Max

iTrader: (59)

No.

iansw

iTrader: (7)

I've done 18 or so Dyno runs, setting it at 100RPM increments down to 4400 and up to 5800.

5000 works best for me every time. But some people have gotten different results.

ejj

iTrader: (5)

Was that when you were an auto or 5sp?

iansw

iTrader: (7)

Hmmm....

You're a genius, ejj!!!

I Dynoed but didn't even think to mess with the RPM Switch at the time. maybe that epxlains some hp loss....



(I was Auto)

IanS

ejj

iTrader: (5)

Yeah, I get that a lot.

96shogunmax

iTrader: (9)

So I should set it higher than 5k?

IceY2K1

iTrader: (3)

Can you FORCE the switchover at low RPM?

If so, dyno withOUT and with(say 2000rpm-redline) MEVI activation and set switchover to occur where the two TORQUEs cross.

AllGo

iTrader: (1)

When i was s/c i had mine at 5100 and there was a small hiccup in the hp/tq line when I dynoed 326whp. It recovered about 5400 so I have since changed to 5300 and the switchover is much smoother. I am not boosted anymore and neal and dave both like 5300 and it sounds right, so I am staying here.

speedemn

iTrader: (14)

I have an NA motor and I dyno tested the optimal RPM switch point and 5200RPM worked out the best for me.

nismo2020

iTrader: (1)

what did you do with your blower?

SteveChicagoSC

I lost 55hp when I opened it at 4500 rpm. At 5000 rpm I lost 20hp. I also found 5300-5400 rpm was the best place to open the vi.

JAY25

iTrader: (38)

he sold it

AllGo

iTrader: (1)

Thanks Jaime, Yeah I really liked the power and was actually planning a fmic in order to use a smaller pulley and get some better torque numbers. The blower seemed to be very sensitive to belt tension and I think the internals were starting to wear after only 20k miles. I will prob just turbo my car within the next 6 months or keep it for another year and then get the awd G35 or maybe an EVO.

iansw

iTrader: (7)

Well, I set it to 5300RPM today.

At the same time, however, I fixed a boost leak.

So it seems faster, but I don't know if it's the switch or the leak.

I'll play with it some more next weekend. I don't drive during the week.

IanS

michaelnyden

iTrader: (15)

now is this 5300rpm's as indicated on the tach....or as seen on a OBD scanner or something more accurate...like a digital readout from the ecu's rpm wire?

looks like the consensous is that 5300rpm's is optimal...doesn't it take 100rpm's to complete the switchover? so it is finishing at 5400 then? and that is optimal...no dip in graph? or would I set it at 5200 and it opens completely at 5300?

Nealoc187

iTrader: (23)

5300 (or 5400 whichever you choose) is the setting on the RPM switch, all tachs seem to read differently so setting it by the tachometer wouldn't make much sense.