Weird issue, nozzle change seemed to have no effect

mrphotoman · 02-16-2008

hey i got a weird problem, running the 3gpm nozzle it starts at 5psi and reads 11:1 a/f and keeps climbing all the way up to 12.7:1 a/f ratio.

I went and just installed the 6gpm nozzle and it started at 10.5:1 a/f ratio and kept climbing again all the way up to 12.7:1 a/f ratio using around 65%meth solution.

I am using a LC-1 wideband with no datalogging. What do you think is going on? Is it the wideband or am I really running that lean? I am afraid to keep running the car in boost till I get this fixed.

I have a 2.7L V6 with a roots style magnum mp62 supercharger running a max of 10psi.

mrphotoman · 02-16-2008

Do you think I may have two 3gph nozzles instead of one 3gph nozzles and one 6gph nozzle? How big of a difference in the hole would there be?

dvldoc · 02-17-2008

The methanol should not be making your car run leaner, You might want to check your MAF sensor to make sure it is functioning correctly.

M6 is to big for that size motor and boost you should not need more than 4gph. If you run to much it makes you slower and your over fueling.

mrphotoman · 02-17-2008

Quote:

Originally Posted by dvldoc

The methanol should not be making your car run leaner, You might want to check your MAF sensor to make sure it is functioning correctly.

M6 is to big for that size motor and boost you should not need more than 4gph. If you run to much it makes you slower and your over fueling.

over fueling even when it says it is in the 12's? I think i am just running out of fuel injector, they are maxed out now (raised the boost 2psi). Would running 100% meth as opposed to 65% or so meth make the a/f ratio drop?

dvldoc · 02-17-2008

To much methanol can cause a lean reading, even if your not really running lean, It does not act the same as gasoline. You need to check your A/F ratio with the system off to see what your car is actually doing then check it with the alcohol on. But a M6 nozzle is way to big for your application.

Now if doing the same with the M3 nozzle you might want to look at your fuel pump being the weak link. Most kits come with upgraded injectors to match the boost and should not get maxed out at there designed level.

Alot of the time what is needed is a voltage booster for your pump or a race pump.

mrphotoman · 02-17-2008

yeah, i think my fuel pump is the problem. i will order one tonight.

thanks

pacemkr86 · 02-18-2008

do you have anyway to moniter injector duty cycle?

mrphotoman · 02-21-2008

i do not have a scanner

02-16-2008	#1 (permalink)
mrphotoman Water Injection Year: 2003 Make: hyundai Model: tiburon Join Date: Feb 2008 Posts: 15	Weird issue, nozzle change seemed to have no effect hey i got a weird problem, running the 3gpm nozzle it starts at 5psi and reads 11:1 a/f and keeps climbing all the way up to 12.7:1 a/f ratio. I went and just installed the 6gpm nozzle and it started at 10.5:1 a/f ratio and kept climbing again all the way up to 12.7:1 a/f ratio using around 65%meth solution. I am using a LC-1 wideband with no datalogging. What do you think is going on? Is it the wideband or am I really running that lean? I am afraid to keep running the car in boost till I get this fixed. I have a 2.7L V6 with a roots style magnum mp62 supercharger running a max of 10psi.

02-16-2008	#2 (permalink)
mrphotoman Water Injection Year: 2003 Make: hyundai Model: tiburon Join Date: Feb 2008 Posts: 15	Re: Weird issue, nozzle change seemed to have no effect Do you think I may have two 3gph nozzles instead of one 3gph nozzles and one 6gph nozzle? How big of a difference in the hole would there be?

02-17-2008	#3 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,973	Re: Weird issue, nozzle change seemed to have no effect The methanol should not be making your car run leaner, You might want to check your MAF sensor to make sure it is functioning correctly. M6 is to big for that size motor and boost you should not need more than 4gph. If you run to much it makes you slower and your over fueling. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

02-17-2008	#5 (permalink)
dvldoc DevilsOwn Staff Join Date: Apr 2005 Posts: 1,973	Re: Weird issue, nozzle change seemed to have no effect To much methanol can cause a lean reading, even if your not really running lean, It does not act the same as gasoline. You need to check your A/F ratio with the system off to see what your car is actually doing then check it with the alcohol on. But a M6 nozzle is way to big for your application. Now if doing the same with the M3 nozzle you might want to look at your fuel pump being the weak link. Most kits come with upgraded injectors to match the boost and should not get maxed out at there designed level. Alot of the time what is needed is a voltage booster for your pump or a race pump. __________________ Currently deployed to Ramadi 1 battalion 12th Marines see you in 8 months.

02-17-2008	#6 (permalink)
mrphotoman Water Injection Year: 2003 Make: hyundai Model: tiburon Join Date: Feb 2008 Posts: 15	Re: Weird issue, nozzle change seemed to have no effect yeah, i think my fuel pump is the problem. i will order one tonight. thanks

02-18-2008	#7 (permalink)
pacemkr86 DevilsOwn Tech Year: 86 Make: Buick Model: T Type Join Date: Oct 2005 Posts: 644	Re: Weird issue, nozzle change seemed to have no effect do you have anyway to moniter injector duty cycle? __________________ Phil Underwood My Turbo Buick

02-21-2008	#8 (permalink)
mrphotoman Water Injection Year: 2003 Make: hyundai Model: tiburon Join Date: Feb 2008 Posts: 15	Re: Weird issue, nozzle change seemed to have no effect i do not have a scanner