Devilsown Methanol Alcohol Water Injection - View Single Post

BlackSportD · 02-28-2008

agrazela, I've been thinking of those scans, are those factory boosted cars? Did they have fuel pressure regulators with gain?

With the MAP sensor method, I'm afraid at 6-7psi of boost, thats a constant voltage rating for the MAP, and so the controller would spray at the same duty cycle at 1500rpm@6psi as it would 5500rpm@6psi. For it to spray similar to an OE MAP'ed sensored car's IPW the controller would also need an RPM and/or TPS input at the least.

So a 2bar MAP with a 3bar controller would give me near atmospheric tuning ability, but at the cost of having a flat spray PWM when I get to full boost.

With the MAF I flirt with having the water/methanol motor come on when I don't want to, or worse not come on when I need it (very low rpm partial throttle boost), but at least the PWM of the motor should reflect IPW better.

If I don't go MAF, I guess I might save money and not get a controller but find a 1psi switch and go with that lol. hopefully the nature of my bypass valve will compliment the MAF method rather than complicate it.

02-28-2008	#9 (permalink)
BlackSportD Water Injection Newb Join Date: Feb 2008 Posts: 8	Re: MAP or MAF agrazela, I've been thinking of those scans, are those factory boosted cars? Did they have fuel pressure regulators with gain? With the MAP sensor method, I'm afraid at 6-7psi of boost, thats a constant voltage rating for the MAP, and so the controller would spray at the same duty cycle at 1500rpm@6psi as it would 5500rpm@6psi. For it to spray similar to an OE MAP'ed sensored car's IPW the controller would also need an RPM and/or TPS input at the least. So a 2bar MAP with a 3bar controller would give me near atmospheric tuning ability, but at the cost of having a flat spray PWM when I get to full boost. With the MAF I flirt with having the water/methanol motor come on when I don't want to, or worse not come on when I need it (very low rpm partial throttle boost), but at least the PWM of the motor should reflect IPW better. If I don't go MAF, I guess I might save money and not get a controller but find a 1psi switch and go with that lol. hopefully the nature of my bypass valve will compliment the MAF method rather than complicate it. Last edited by BlackSportD; 02-28-2008 at 06:47 PM.