Engine/Transmission (1994 - 1998) Too much boost.

[Got Smoke?]

Ok well on a back on the way home tonight I let the truck unwind a little with the new clutch and injectors!Oo.



Well I glanced over at my Boost gauge and it was on 35PSI with just my new injectors and my #10 is sitting sitting in the garage.



I know that as soon as that plate goes in I'm going to be able to easily go past 35PSI because my foot wasn't even on the floor tonight!



One thing I've noticed while fooling with AFC settings is that if your AFC housing is back it will limit your boost correct? If so this is where I run into a problem as my rack stop is removed from my AFC housing for "smoke on demand" :-laf



My theory that I'm wondering about is that



If I just reinstall my rackstop where my AFC isn't "gutted" then I can move my AFC housing full back to help with some boost, but then if I crank my AFC spring full forward will I still be able to get my "smoke on demand" ?



Thoughts/suggestions/comments welcomed.



Edit still on factory HX35x12wg'd

 

[Forrest Nearing]

what injectors? with 370's and a #6 full forward and AFC full forward, I was still able to maintain ~36psi on the stock 35/12



Forrest

 

[Got Smoke?]

Originally posted by Forrest Nearing

what injectors? with 370's and a #6 full forward and AFC full forward, I was still able to maintain ~36psi on the stock 35/12



Forrest

Sorry, PDR 370's

 

[Forrest Nearing]

I think you'll be alright... obviously not ideal... EGT's would climb pretty quickly on the highway under heavier throttle, but boost never crept. I could hit 35psi at part throttle no problem too



Forrest

 

[T. Baker]

I've been running without a plate for a long time. The govenor arm does ride against the AFC arm and you can use it to control fuel but the spring in there gets fully compressed pretty quick and then the AFC moves out of the way for full fuel. A stiffer spring could make it hold off of full fuel a little longer

Another thing about no plate is that if you put you foot on the accelerator when starting the govenor arm seems to go under the AFC all the way to full fuel until it starts and the govenor pulls the rack back. This is the only reason I am considering putting the plate back in. The plate guides the govenor arm up to the afc arm. At very low RPMs ( under 400?) the govenor arm is lower than the afc arm. I think that is the whole purpose of the "nose" and then the ramp on a plate.

I did adjust my govenor arm as high as I could but it still is under the AFC with the engine stopped. It is close though. If one could make the AFC arm a little longer or bend the govenor arm up a little then the AFC could control max fue at all times. It would be easy to add a regulator in the cab that controled boost to the AFC giving total control of max fueling.

We have to figure this stuff out because the people who know thease answers don't want to tell us because they are afraid they will loose money on sales. That is ok because us grass roots guys will figure it out anyway. Just look at the whole twin turbo thing!