EEC tuner question?

[blk94svt]

Hey guys. Powerdyne is going in Tuesday night. After that, I was wondering if I should stay speed density or switch to mass air. Would it be practical to stay speed density and just get an EEC tuner? If so, any tips that may help me find the best price or best place to buy? Thanks.

Sax

 

[BLoG]

I think the prevailing opinion right now is to stay speed density and get the tuner.

(you don't NEED either for just a mild powerdyned truck of course)

 

[BLoG]

Also, check out the Performance Specialties forum on the main page. Everyone around here seems pretty happy with Raymond B's service, and i think most of them got their tuners from him.

One more thing: be sure to set your timing down to 10* at first after installing the powerdyne.

 

[blk94svt]

Thanks BLoG. I'll check Performance Specialties out. Thanks for the timing tip also.
SAX

 

[Raymond_B]

Come on down to my forum we'll talk

Seriously though, a Tuner or mass air is not required for the Powerdyne. A boost retard and FMU will go far on a mostly stock truck.

If you want every last bit then you might want to get something to help you tune the computer. Especially if you will be doing other upgrades like heads, cam, injectors, etc.

 

[Lightning Struck]

Hey Raymond, have you made any headway on the MAP situation?? And how does the fact that it'll only go to ambient pressure(roughly 14.7 or barometric pressure) effect superchargers?

Doesn't the MAP peg to 170Hz right away during boost?? Because doesn't it sample the barometric pressure with Key On before the motor cranks over and sets that value to 170Hz?

(Curts been doing some reading )

 

[Raymond_B]

Well the MAP deal really isn't a situation, it's more of me wanting to have greater control over boosted vehicles. MAP range is from 89-162Hz when the truck initializes it sets MAP = to 150Hz.

MAP looks to peg at ~2lbs of boost, and load and fuel taper off a bit, but the WOT multiplier and other fuel items can overcome that.

 

[GJLS]

Curt It will actually see about 3#'s of boost and top out at around 205hz according to my data logs


Jerry

 

[blk94svt]

Thanks Raymond. I'll get in touch with you when I make more mods like cam, heads, etc....

Sax

 

[Lightning Struck]

*Grabs his goatie and ponders*

Interesting....

So can we conclude how high of frequency it would take to control 15psi just by taking the difference(205-150) and dividing that by 3( 55/3=18.333) then multiplying that by any given boost pressure(e.g 15psi) and add on the 150Hz and come up with a frequency we would need for that given manifold pressure?? In the case of 15 psi it would be 425 Hz?

I'm not really worried, I'm just becoming very intrigued with the flexability the tuner gives to diving into the a$$ over tea kettle..

Us engineering types love this!!

 

[Raymond_B]

Damn I sell they guy a data logger and he comes back and dogs me He he.....

You might be slammin' that bad boy with boost past the intended max of 162Hz, but the computer don't care

Curt I'd like to build a voltage to frequency converter using a GM 3bar MAP sensor. Then scale it (the frequency output) to work up to 20-25lbs of boost. I picked up some samples of a National Semiconductor LM331 chip. Now I just have to figure the curcuit out, and I suck at the hardware stuff.

Really all I'd like to do is just keep MAP rising proportional to boost, that way the PCM never see's a flat MAP line and starts dropping calculated load.

Curt It will actually see about 3#'s of boost and top out at around 205hz according to my data logs


Jerry

 

[Raymond_B]

Good deal, keep us posted on how your truck does !!!

Thanks Raymond. I'll get in touch with you when I make more mods like cam, heads, etc....

Sax

 

[Thundrn_Lightning]

Thanks Raymond. I'll get in touch with you when I make more mods like cam, heads, etc....

Sax

Yeah, and come on over and I'll give you a little demo of the EEC-Tuner in my truck. (I think you'll like it!!! ) Have fun with that Powerdyne.

Later,

 

[Lightning Struck]

Curt I'd like to build a voltage to frequency converter using a GM 3bar MAP sensor. Then scale it (the frequency output) to work up to 20-25lbs of boost. I picked up some samples of a National Semiconductor LM331 chip. Now I just have to figure the curcuit out, and I suck at the hardware stuff.



[/B]

So the GM MAP sensor doesn't use frequency but voltage.. Seems like ford should have done it that way to begin with, but I digress...

 

[Raymond_B]

Who knows why we just had to be different and use frequency !!!!

So the GM MAP sensor doesn't use frequency but voltage.. Seems like ford should have done it that way to begin with, but I digress...