Cos5 boost and MAF

[tor1965]

Hi
I am preparing for an E-force supercharger on my LS3 Impala clone. I have used the 12212156 os, and have now switched to cos5.
Can I use the MAF sensor on this os when using the boost ve table and a 2 bar MAP?
Is cos5 the best os that I can use with boost and this PCM?
Is this pcm suitable for this application or should I go for a newer pcm?


Tor

[nevinsb]

Same PCM and OS that I am using, and yes, you can use the MAF with COS5.

[L31Sleeper]

The 12200411 PCM takes a 24x crank signal and the LS3 has a 58x crank reluctor.

-Justin

[nevinsb]

Hmm, for some reason I just assumed he already had it working.

[joecar]

LPE sells a module for converting 58x/4x to 24x/1x.

[L31Sleeper]

LPE sells a module for converting 58x/4x to 24x/1x.
OH that's right, it only lowers the resolution.

I don't see any problem with keeping that PCM. What is an LS3 Impala Clone (1996 Caprice ??)

[joecar]

It actually converts the CKP signal from straight 60x (with 2 missing pulses) to encoded 24x (encoded sequence of 12° and 3° pulses), and reduces the resolution on the CMP signal.

:)

[L31Sleeper]

It actually converts the CKP signal from straight 60x (with 2 missing pulses) to encoded 24x (encoded sequence of 12° and 3° pulses), and reduces the resolution on the CMP signal.

:)

What I meant was you can't go from a 58x PCM to a 24x Engine.

[joecar]

Ah, I see now what you said, ignore my comment :doh2:

[tor1965]

Sorry for simplifying to mush.
The car is originally a 91 caprice and for now it is just the interior that looks like the original car.
It have an Gm performance parts LS3 engine, 2002 f-body engine controller, wiring harness and accessory, Lingenfelther 58 – 24 conversion box, 4L60E transmission. The engine was installed last year and has been running 15000Km as my daily drive.
I have bought an Edelbrock E-force supercharger kit for a 2010 Camaro that I am going to customize for the car. Now I am waiting for a 2010 Camaro front accessory kit from Pace to fit the supercharger. The pulley on the supercharger is ¾“ longer from the block then the old 2002 Camaro front accessory.
I have converted from 12212156 os to cos5 and are test driving it now, before I start installing the compressor.
My question is actually if this os are the best to use with this engine compressor combination, or if it is other combination that is better suited. The car is my daily drive summer and winter
When I look at the Cos1-3 tutorial it seems like I can’t use maf and 2-3 bar map at the same time? Is this true?

Tor


11691

[nevinsb]

Just update your c6301 and c6302 values for the MAP sensor you have. You can re-enable the MAF once you ran through the VE tuning.

[joecar]

Tor,

Yes, COS5 is suitable for your compressor.

You can certainly use 2-3 bar MAP and MAF.

[Highlander]

Are you guys using a hybrid system for fueling at WOT? or just switching over xxxxrpms?

This is something I have been contemplating on using with my ls1/lt1 car. Doing a full tune MAF then full tune SD. and hybrid them all the way up to WOT. Problem is that making changes is really a problem, as you have to deactivate one system, tune, deactivate the other, tune and be done.

[L31Sleeper]

The way I see it is if you take two numbers that "should" be accurate and average
them that should be the MOST accurate number. So I set my switch point to 10,000 RPM
For a drag car I wouldn't waste my time doing this, but for a street / road race car it seems
to be the way to go for me.

-Justin

[Highlander]

THat is the point... reality vs theory...