TeamRX8

iTrader: (25)

denso/3 = NGK

27 = 9
31 = 10.3

kma5783

iTrader: (7)

If the 10's don't foul out, the full set of NGK Race Plugs or the Denso's may be the way to go.

TeamRX8

iTrader: (25)

I generally wouldn't recommend 10 for the street because IMO they are too cold for low rpm cruise and idle conditions.

kma5783

iTrader: (7)

Yea that's what I was thinking, more suited for track conditions at consistently higher heat.

TeamRX8

iTrader: (25)

Think I'll just run the race plugs leading only myself, not sure why I never thought of it before

hoss -05

iTrader: (4)

^--- the denso race plugs are the way to go.

TeamRX8

iTrader: (25)

I will never choose Denso over NGK for a rotary, never

hoss -05

iTrader: (4)

lol am curious why?

Sifu

iTrader: (34)

I still need to get a few things tweaked from Steve sometime soon. As promised, here are the results of my dyno.

Brettus

iTrader: (2)

Not bad for a mustang dyno and ...... 7 psi was it ?

shadycrew31

iTrader: (6)

Whats up with the AFRs at 6000 and 7000?

hoss -05

iTrader: (4)

^---- i'm fairly sure it is where the VDI was opening.

shadycrew31

iTrader: (6)

I might be wrong but I don't think the AFR's should move with the VDI and APV's. The HP line usually shows dips but the AFR should be a straight line all the way through. Otherwise you'd be going super lean under boost which is a no no.

That line there is 11.3 afr at I am guessing 8psi 6200rpm.

Again I could be reading it all wrong...

9krpmrx8

iTrader: (46)

Yeah, the VDI technically opens at 7200RPM but IIRC it is dependent on load so I am pretty sure that is what that is. Either way, it is not an issue, it is still a spike withing the safe range under boost.

Brettus

iTrader: (2)

The lean spike at 6000ish is pretty common on and is the APV opening . The other rich spike at 7000 is a mystery though - never seen that before . VDI always opens at 7250 irespective of load.

shadycrew31

iTrader: (6)

Seems like you could correct that issue in the VE table...

11.3 seems pretty dam lean under boost, I am no master of tuning. It just doesn't seem like something safe to see under boost.

Brettus

iTrader: (2)

The spike is so sharp I would doubt very much that any adjustment would fix it . Would be interested to see if it was repeated on all runs - could just be a 1 off thing.


11.3 is perfectly fine under boost ......

shadycrew31

iTrader: (6)

Hmm I was always told 10.8 is as lean as you want to go...

But then again this is the rotary community and everyone has their own opinions.

hoss -05

iTrader: (4)

The spike was on every dyno that i saw. Steve did work on this spike a bit. Its much better then it was at the start of the tuning process.

9krpmrx8

iTrader: (46)

Remember what RBT is? 10.8 is low end.

FazdaRX_8

iTrader: (1)

APV is pretty hard to get even, but i would keep the vdi closed in general,

remember in factory form the vdi acts like a supercharger effect, taking the pulse from one rotor and giving it to the other, from my experience this is no different then when your boosting it, it causes a localized boost if you will, this is how my last motor blew, as it detonated around 7000rpms

9krpmrx8

iTrader: (46)

I have been considering installing the Greddy block plate lately actually.

slash128

Just wondering, would the block plate do anything for VDI since VDI valve is between the main runners? I thought the block plate was for the secondaries. Maybe I misunderstand.

9krpmrx8

iTrader: (46)

Yeah the block off plate won't affect the VDI. I just posted a random thought,

slash128

Ok gotcha. I was just confused. Great progress tho man, glad to hear you are enjoying the car regardless of numbers! And some good info coming out of this as well.