Hey guys, Running my sled with a CPR turbo, I can get the A/F ratio around 14 at Idle, 12-13 at cruise/trail speeds, and under acceleration and WOT it reads 9. I played around with the main jet setting and the boost setting and couldn't get the numbers to come up.
If I remember here are the current numbers
settings 1-2.5
2-2.5
3-3.5
4-3.5
Any body have any suggestions???
thanks
aj
If I remember here are the current numbers
settings 1-2.5
2-2.5
3-3.5
4-3.5
Any body have any suggestions???
thanks
aj
How many lbs boost, and can you confirm what settings are for yellow/blue and red/blue?
Hey Jim, Next time I get up to my sled I will check to see where the numbers are for those settings, and I am running 12 lbs. boost
aja636 said:
OK. I'm out in the field this week-end dialing in a customer's sled. Ultimately I'm taking it to 14-15lbs, but I'll be stopping at 12lbs along the way. I'll post my tuning notes here for you tomorrow.
1=2.5
2=2.5
3=3.5-5.0 depending on sled
4=3.5-5.0 depending on sled
5=5.0
6=2.0
call me when you gety a chance and we can go over the settings, i have never seen a sled run that rich, i would like to see the guage recalibrated also. i'll go over it with you when you call. jeff
2=2.5
3=3.5-5.0 depending on sled
4=3.5-5.0 depending on sled
5=5.0
6=2.0
call me when you gety a chance and we can go over the settings, i have never seen a sled run that rich, i would like to see the guage recalibrated also. i'll go over it with you when you call. jeff
SIMONS CPR said:
Jeff, that's pretty consistant with what I'm at right now, except this sled seems to like 3 & 3 on the first two settings.
What would you suggest as a starting point for 14 LBS?
visegrip
Extreme
2.5
2.5
5
5
5
3
15lbs of boost all day today can't get enough weight in heavy hitters off line the to keep off rev limiter
118mph in 750 ft
1inch track with 1.38 push thru chizels
2.5
5
5
5
3
15lbs of boost all day today can't get enough weight in heavy hitters off line the to keep off rev limiter
118mph in 750 ft
1inch track with 1.38 push thru chizels
visegrip said:
What where your a/f readings with these settings at the important throttle positions?
blown apex
VIP Member
is this pure logic controller similar
or the same as mountains
1 idle
2 needle
3 main
4 boost fuel adder
5acc pump
6 altitude compensator
mountains updated controller seems to
be different way rich on 1 and 2 settings 9.0 afr
and cutting out at slow cruise speeds using
1-2
2-3
3-5.5
4-5.5
5-1
6-9
setting it to
1-1
2-1
3-6.5
4-5.5
5-1
6-5
and lowering alt comp 6-9 to 6-5 brings afr
a lot leaner and stops cutting out
ran 3 up to 6.5 to be safe on main jet
wot is 11.2 afr
this set up wont run good on cold engine
12 psi stage 1 apex 3 head gaskets
ngk/ntx wide band, racepak computer dash,
cpr clutches and ulhmer od clutches, 25 tooth top gear,skidoo drivers, fully cliped/192 studed ripsaw,vortec blowoff valve but blocked it off when
i started having this problem(made plate)
(any help with this fuel controller will be apreciated
because i live 9 hrs from were i sled )
oh and boots are still on and straped
thanks
or the same as mountains
1 idle
2 needle
3 main
4 boost fuel adder
5acc pump
6 altitude compensator
mountains updated controller seems to
be different way rich on 1 and 2 settings 9.0 afr
and cutting out at slow cruise speeds using
1-2
2-3
3-5.5
4-5.5
5-1
6-9
setting it to
1-1
2-1
3-6.5
4-5.5
5-1
6-5
and lowering alt comp 6-9 to 6-5 brings afr
a lot leaner and stops cutting out
ran 3 up to 6.5 to be safe on main jet
wot is 11.2 afr
this set up wont run good on cold engine
12 psi stage 1 apex 3 head gaskets
ngk/ntx wide band, racepak computer dash,
cpr clutches and ulhmer od clutches, 25 tooth top gear,skidoo drivers, fully cliped/192 studed ripsaw,vortec blowoff valve but blocked it off when
i started having this problem(made plate)
(any help with this fuel controller will be apreciated
because i live 9 hrs from were i sled )
oh and boots are still on and straped
thanks
I just got off the phone with my dad who is at NY with my sled, Got my numbers and they are
2.5
2.5
3.5
4
5
5
so now I see why it is over rich comparing these numbers.
Next time I go up I will run you numbers jeff and Jim and see what happens.
thank you all
aj
2.5
2.5
3.5
4
5
5
so now I see why it is over rich comparing these numbers.
Next time I go up I will run you numbers jeff and Jim and see what happens.
thank you all
aj
blown apex said:
The attitude box works like this:
1 - pilot
2 - needle
3 - main
4 - Boost fuel
5 - boost fuel switch point (switch point for when boost fuel addition engages).
6 - Full throttle RPM switch point (switch point for when full throttle fuel addition engages).
jim, my box is different from all others,
2nd circuit is amount of accellerator fuel added
5th circuit is sensitivity of when it adds accellerator fuel
6th circuit is when green circuit (mode1) switches to red curcuit (mode3) based on load.
you will only trigger yellow circuit (mode2) when load is rapidly increased, it is only on for less than 1 second to give fuel to eliminate bog for transition from cruise (green mode 1 ) circuit to high load (red mode 3 circuit) by controlling sensitivity and amount of fuel on accellerator circuit, you get the best of both worlds, throttlle response and fuel milage, my controller is the only one that has this feature. jeff
2nd circuit is amount of accellerator fuel added
5th circuit is sensitivity of when it adds accellerator fuel
6th circuit is when green circuit (mode1) switches to red curcuit (mode3) based on load.
you will only trigger yellow circuit (mode2) when load is rapidly increased, it is only on for less than 1 second to give fuel to eliminate bog for transition from cruise (green mode 1 ) circuit to high load (red mode 3 circuit) by controlling sensitivity and amount of fuel on accellerator circuit, you get the best of both worlds, throttlle response and fuel milage, my controller is the only one that has this feature. jeff
Just like a normally aspirated engine (they're all just air pumps) if you increased air flow you will need to increase fuel flow to maintain the proper air fuel ratio.
The controller for the supercharger is made by Dobeck for MPI.
MPI has many private label customers that use these controllers with different internal parts and programming specified by the company they are built for and it's application (Bender, Simons, Alpine, Powderlites, Pure Logic, etc)
MPI's supercharger fuel controller allows you to tune the fuel injection much the same way you would jet a carburetor and has the following adjustable functions.
1- Pilot (Adds fuel for Idle/Cruise)
2- Needle (Adds fuel for transition to main jet)
3- Main (Adds fuel Wide-Open-Throttle)
4- Boost Fuel Adder (Adds fuel for boost pressure)
5- Accelerator Pump (Adds fuel under abrupt acceleration)
6- Altitude Compensation (Adds fuel for altitude changes)
Right now all units are Gen3s or Gen3.5 but look for the Gen4 units in mid-2008 or 2009. The Gen4 units will have a 10-millisecond reaction time vs the current 100-millisecond reaction time. A faster microprocessor = more calculations in less time. It will also be able to subtract fuel if needed, unlike the current versions, which can only add fuel.
My point to to the paragraph above is if you SNAP the throttle closed with your AFR right on target or a bit lean you will get a lean/dead-spot for 1/10th of a second. This is because the controller hasn't caught up to your request. If you progressively squeeze on the throttle (take 1/10th of a second or longer) or you keep the AFR a tad on the rich side you won't get that lean/dead-spot.
The controller for the supercharger is made by Dobeck for MPI.
MPI has many private label customers that use these controllers with different internal parts and programming specified by the company they are built for and it's application (Bender, Simons, Alpine, Powderlites, Pure Logic, etc)
MPI's supercharger fuel controller allows you to tune the fuel injection much the same way you would jet a carburetor and has the following adjustable functions.
1- Pilot (Adds fuel for Idle/Cruise)
2- Needle (Adds fuel for transition to main jet)
3- Main (Adds fuel Wide-Open-Throttle)
4- Boost Fuel Adder (Adds fuel for boost pressure)
5- Accelerator Pump (Adds fuel under abrupt acceleration)
6- Altitude Compensation (Adds fuel for altitude changes)
Right now all units are Gen3s or Gen3.5 but look for the Gen4 units in mid-2008 or 2009. The Gen4 units will have a 10-millisecond reaction time vs the current 100-millisecond reaction time. A faster microprocessor = more calculations in less time. It will also be able to subtract fuel if needed, unlike the current versions, which can only add fuel.
My point to to the paragraph above is if you SNAP the throttle closed with your AFR right on target or a bit lean you will get a lean/dead-spot for 1/10th of a second. This is because the controller hasn't caught up to your request. If you progressively squeeze on the throttle (take 1/10th of a second or longer) or you keep the AFR a tad on the rich side you won't get that lean/dead-spot.
