NMJ87T2

iTrader: (8)

I am currently running one in my 87 T2. How much timimng will it take out in relation to boost pressure? I know that it dores not have a fuel cut, but how safe is it to run at elevated boost levels?

If there is any more info that any of you have it would be very helpful to me. All of this is to better understand the limitations of my setup.

Thanks

RETed

With turbo ECU's running under $50, you really should not be doing this.


-Ted

rotarydelight

Turbo Ecu's Under 50 Bucks? Yeah Right!

RETed

https://www.rx7club.com/showthread.php?t=575011
https://www.rx7club.com/showthread.php?t=574637

Your search skills need to be improved.


-Ted

NMJ87T2

iTrader: (8)

RETed: Would you mind going into more details about why not to run the N326. My car runs a lot better with this ecu than it did with a N332.

Thanks

2713ddddavid

iTrader: (1)

What???????
One is an NA ECU the other is a Turbo ECU. One is for a boosted motor the other is not. What more explanation do you want?

NMJ87T2

iTrader: (8)

Yes, one is out of a convertible and one is from a T2. Please explain why my car runs better with the N326.

RETed

N326 out of a convertible?
Um, is this a US-spec vehicle?
1988 vert ECU should be an N338.

All else being equal, the non-turbo ECU runs way more aggressive ignition timing.
This could imply your engine is running rich.
OR the turbo ECU is just bad...


-Ted

Icemark

A S4 convertible uses a N338 ECU.

A S4 non turbo coupe uses a N326 which has entrily different ignition, and fuel maps. Not even close to a Turbo map found on a N332 or N333 S4 Turbo ECU.

And Turbos use different intake timing all together.

And a N326 wouldn't even have knock protection, or re-adjusting timing for preventing detonation when the turbo went to boost. Infact under 4000 RPM you would even get ignition advance on a N326 when there was 0 or higher manifold pressure.

and we haven't even gotten to the waste gate control or the scroll design that the N326 would have no effect on

NMJ87T2

iTrader: (8)

I was informed that it was a conv ecu. My car does run risch all the way through the rpm range, butb I do not have any problems with leaning out at all. If anything, I am running way too rich. I have not had any fuel cut issues at all since I began running a N326. The performance of my car was drasticly improved by the N326 over trying four different N332 ecu's.

NMJ87T2

iTrader: (8)

Twin scroll is disabled on my vehicle as well.

iceblue

What happend to runing the N338? Last time we worked on your car and switched to a good N338 an acceptable ECU things were fine. Why are you back to the N326?

Icemark

Yeah, the N326 is programmed to fire 460cc injectors not 550cc... no wonder you are running rich.

But you still have some radical timing advance issues. Again the N326 is designed for 6 port intakes, 460cc injectors, and no boost.

NMJ87T2

iTrader: (8)

Iceblue is correct. I am running an N338. I do not know where I got N326 from. Sorry for the misinformation.