It will open in the 3200-3800 (approx.) range depending on load . After 3800 it will open regardless of load.
FWIW on my FI engine I have taken to opening it at 4000 and did notice an improvement in gas mileage (as well as a better transition) by doing this .
I don't believe the mileage improvement be there if the same was done to an NA engine however , plus the NA engine would probably lose some torque by doing this.

 

Setting it to 3500 will only give you 3500 under lower load conditions . You have to set it above the normal max. (3800 approx.) for it to always open at the set rpm.

 

I really felt a difference, probably because of going into higher loads much sooner with the turbo.
sounds like there is a hidden table ssv open rpm vs load?

could the coolant label acually be load?

 

Ok, so here is what I've learned. I'm not 100% on any of the conclusions, but it goes along with what I've seen.

As you lean out the trailing plug gets more effective and the leading plug gets less effective. Kinda makes sense if you think of the differences in AFRs around the plugs.

I reached a point quite quickly where as I pulled fuel the engine acted like I was pushing more advance. The only way to get everything back was to pull timing (I pulled leading, but probably needed to pull both.) I had cruising EGT dropped 60F+ and very retarded leading timing.

Now to answer some questions I'm returning to stock and getting a fresh baseline. After that I'm going lean first then pushing trailing timing. No negative split going into it.


And to answer some previous concerns, transition to rich afrs is smooth as long as its spread across a decent change in load, and so long as low load is at the same lean AFR. You can go from lean to rich, but not rich to lean! No jerkyness or otherwise just a rapid increase in power top end. Should be able to smooth is out using throttle tables.

 

Idk if you'll get this or not but looking into reversing my timing. 04 rx8 13b n/a. Will it do what yours does? Unsteady and lopey? Probably not legit like a bridgeport but is it at all similar? Pros vrs cons? I want to but don't want to ruin anything

 

not sure you’re likely to hear from him, but you’re best chance at ruining something is to unnecessarily mess with things you don’t understand.

am I understanding correctly that you just want to pretend to have BP trying to play the brap-brap look at me and how cool I am game by ruining the way your engine runs at low rpms?

I recently bought an REW engine swap with real BP and let me just say I can’t get rid of the BP’s soon enough, but eventually will. What a loud, annoying, uncivilized pitb it is for any kind of normal street driving. Definitely a track/competition only mod imo.
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