Controller MAP question HELP!!!

607motorsports · 05-02-2007

I have a 2005 Cobalt SS/SC and it has a stock 2 bar MAP sensor in it. But i'm running 20psi right now. The controller is set to 3 bar so can i just leave it set there so I can have the starting point come on at 8-10psi and full spray at 16psi? Please let me know asap

Thanks

pacemkr86 · 05-02-2007

it should work.. lets see what Chance has to say..

607motorsports · 05-02-2007

everything is already all hooked up and ready to go so i really dont wanna have to cut it back out of the car... I had no idea about the 2/3 bar deal until I happened to see it on this site :(

pacemkr86 · 05-02-2007

have tried it out at all?
using a 3 bar controller and a 2 bar map its prolly going to come on sooner," be rich" how envoled is it for you to upgrade to a 3 bar map sensor?

607motorsports · 05-03-2007

i haven't tried it out as of yet, i was hoping to hear back from the experts first... i'd like to just run it as is because its a pain to remove and redo but if need be i guess that's what i'll do. Anyone have any other info? Thanks so far !

Rocket468 · 05-03-2007

You need to run the controller in 2 bar mode when hooked up to a 2bar map sensor. If you just bought this from us we can swap out the face plates if you got the wrong kid. If your wanting to have more controll over our system at boost ranges over 15psi you will need a 3 bar map sensor and run it seperate from your pcm.

Instructions for swaping the cotnroller over. http://www.alcohol-injection.com/instructions-i-7.html

Rocket468 · 05-03-2007

Running a 3 bar controller on a 2 bar map can cause the water injection to come on before boost is present. ex. key on car not running can cause they system to run if the knobs are adjust too low. Anything under 2.8 volts on a 2 bar map is vaccum. And 1.8 volts for a 3 bar. they both read from 0-5 volts but the scales is what sets them apart.

607motorsports · 05-03-2007

I took the car out for some tuning this morning just to see how the controller would work set in its current mode. With how I have it set right now at about 15psi as a start i'm getting an actual 8-10psi starting spray and no spray under that point. I do not want to continue to run it this way forever so yes I will need a new 2 bar MAP faceplate, how do I get one? Thanks for the info.

05-02-2007	#1 (permalink)
607motorsports Water Injection Newb Year: 2005 Make: Chevrolet Model: Cobalt SS/SC Join Date: May 2007 Posts: 4	Controller MAP question HELP!!! I have a 2005 Cobalt SS/SC and it has a stock 2 bar MAP sensor in it. But i'm running 20psi right now. The controller is set to 3 bar so can i just leave it set there so I can have the starting point come on at 8-10psi and full spray at 16psi? Please let me know asap Thanks

05-02-2007	#2 (permalink)
pacemkr86 DevilsOwn Tech Year: 86 Make: Buick Model: T Type Join Date: Oct 2005 Posts: 644	Re: Controller MAP question HELP!!! it should work.. lets see what Chance has to say.. __________________ Phil Underwood My Turbo Buick

05-02-2007	#3 (permalink)
607motorsports Water Injection Newb Year: 2005 Make: Chevrolet Model: Cobalt SS/SC Join Date: May 2007 Posts: 4	Re: Controller MAP question HELP!!! everything is already all hooked up and ready to go so i really dont wanna have to cut it back out of the car... I had no idea about the 2/3 bar deal until I happened to see it on this site :(

05-02-2007	#4 (permalink)
pacemkr86 DevilsOwn Tech Year: 86 Make: Buick Model: T Type Join Date: Oct 2005 Posts: 644	Re: Controller MAP question HELP!!! have tried it out at all? using a 3 bar controller and a 2 bar map its prolly going to come on sooner," be rich" how envoled is it for you to upgrade to a 3 bar map sensor? __________________ Phil Underwood My Turbo Buick

05-03-2007	#5 (permalink)
607motorsports Water Injection Newb Year: 2005 Make: Chevrolet Model: Cobalt SS/SC Join Date: May 2007 Posts: 4	Re: Controller MAP question HELP!!! i haven't tried it out as of yet, i was hoping to hear back from the experts first... i'd like to just run it as is because its a pain to remove and redo but if need be i guess that's what i'll do. Anyone have any other info? Thanks so far ! Last edited by 607motorsports; 05-03-2007 at 12:26 AM.

05-03-2007	#6 (permalink)
Rocket468 DevilsOwn Staff Year: 2000 Make: Pontiac Model: Grand Prix Join Date: Apr 2005 Posts: 1,124	Re: Controller MAP question HELP!!! You need to run the controller in 2 bar mode when hooked up to a 2bar map sensor. If you just bought this from us we can swap out the face plates if you got the wrong kid. If your wanting to have more controll over our system at boost ranges over 15psi you will need a 3 bar map sensor and run it seperate from your pcm. Instructions for swaping the cotnroller over. http://www.alcohol-injection.com/instructions-i-7.html

05-03-2007	#7 (permalink)
Rocket468 DevilsOwn Staff Year: 2000 Make: Pontiac Model: Grand Prix Join Date: Apr 2005 Posts: 1,124	Re: Controller MAP question HELP!!! Running a 3 bar controller on a 2 bar map can cause the water injection to come on before boost is present. ex. key on car not running can cause they system to run if the knobs are adjust too low. Anything under 2.8 volts on a 2 bar map is vaccum. And 1.8 volts for a 3 bar. they both read from 0-5 volts but the scales is what sets them apart.

05-03-2007	#8 (permalink)
607motorsports Water Injection Newb Year: 2005 Make: Chevrolet Model: Cobalt SS/SC Join Date: May 2007 Posts: 4	Re: Controller MAP question HELP!!! I took the car out for some tuning this morning just to see how the controller would work set in its current mode. With how I have it set right now at about 15psi as a start i'm getting an actual 8-10psi starting spray and no spray under that point. I do not want to continue to run it this way forever so yes I will need a new 2 bar MAP faceplate, how do I get one? Thanks for the info.