Okay, I know some people on here have successfully run 370cc's with a 300z MAF on the stock ECU with boost, and no FMU. To those that have/currently run that setup, are you having any problems? What are you using for fine tuning?

I ran something similiar with my 240, but I did adjust my SAFC to account for the larger injectors and MAF. Is anyone doing this with the Max? This will be on a 98 BTW. I have no problem running an AFC, but am still wondering if those running this setup are correcting for it with one.

Eventually I would like to run an emanage, but I would like to get everything up and running for a while first.

So, feedback... pro's, con's, trouble with, for, against... If you have experience with this setup, please let me know your opinion/experience.

Thanks in advance.

 

With that setup, you will NEED some type of FMU to bump fuel pressure when boost comes into play.


-matt

 

Thats the thing, I KNOW other people have used this setup without an FMU. Iansw ran a stock ECU with his setup while he was having trouble with his JWT ECU, and he didn't run an FMU with it.

 

i had a jwt ecu programmed for 370c z32 maf 7200 rev sc prog got rid of the jwt didnt use it ran better without it was runing with the stock ecu and afc?

 

I think I remember Speedcrazie saying he just ran z32 maf and 370s but it ran a little rich, don't think he had an fmu tho so maybe p.m him.

 

I have ran that exact setup, successfully with no FMU. I did however have a walbro in the tank. I did not use anything to tune it. Sure there is room to tune, but I daily drove with this setup and had ZERO problems. There are members that will say otherwise, however I have ran this setup and think it would be fine for a temporary setup.

I believe Ian asked the same question at one point, and then decided to try it, he may have more solid information since he has a wideband IIRC.

JP

 

I have 370s and Z32 maf with no ECU and no FMU. Emanage blue controlling.

I have a cold start issue that I've never been able to nail down. Warm starts are perfectly normal (engine warm, air temp doesn't matter). But if the engine is cold, then it's difficult to get started especially in cold air. Once I get it fired and rev it up above about 2500rpm though, the idle settles down to normal values and it behaves like normal. It's not providing enough fuel for cold start I think.

 

What PSI is this setup going to be seeing?

 

I plan on running a 3.25 pulley so it should be around 10 psi. It's going to be on a V1 T-trim, and I have 'heard' that they put out a little more, but I'm not claiming that until I see it for myself.

I have heard of cold start issues, Iansw said he had them once in a while. I will be running a walboro, an afpr, wideband, and a afc. I ran a similiar setup on my turbo 240 with the KA24 in it without many issues, but I prefer to learn from others experiences/mistakes whenever possible, rather than screwing something up on my own.

To anyone running this setup with a SAFC, did you setup your AFC to adjust for the larger injectors and MAF, or did you just leave the settings for the stock injectors and MAF? I can see that making a difference.

Thanks for all the input so far!!!

 

With emanage, your able to set up for the 370's and z32 mafs.

 

I had the Z32 MAF/Injectors + Stock ECU for several months. Sometimes, since my T-Rex pump was on all the time once the ACC was on, the engine would flood a little on cold start. I simply would unplug the T-Rex, wait a few minutes, and it would start right up.

It did run rich when cold however - but once it was warm and running it ran really well - Was stoich at idle, and 13.0:1 at 6000RPM with no adjustments on the SAFC.

I only went back to the JWT because it does run a tad safer (timing and richness) and it has the extended Rev Limit.
Mostly I went back to the JWT because it seemed too good to be true that it ran so well with the stock ECU and I was paranoid.

I run at 14.5PSI on my 2.87" Pulley.

 

Did you adjust your SAFC for the 370CC injectors and 300Z MAF, or did you run it with the MAF/Injector setting?

 

For the SAFC I changed the Sensor Setting to be Z32 - but the actual Rich/Lean settings were zeroed out.

 

Oh - I have a SAFC I - no setting for Injectors, only for MAF Type.

(Is there an Injector size setting on the SAFC II?)

 

You know, thinking about it now, I don't think so, I think its MAF only. For some reason I thought there was, but on my SAFC II, I don't remember changing injector types, only MAF types.

 

The SAFC II does not have the ability to scale the injectors.

You should be fine with the 370's, stock ECU, Z32 MAF, and SAFC. You may run into some cold start flooding but turning down the base fuel pressure a bit and making larger SAFC corrections should solve that.