I have Razors dual alchy kit. Im at 20lbs of boost and 18* timing. I have the alchy pump speed at 8. Im at the richest setting on my MER thumbwheel and FP with line off is at 41/42 lbs. My o'2s are at 805-815 range. I like to keep pt round there just to be safe:smile: I want to turn the boost up. Considering my ALCHY is at max on 8, Do i need to raise the FP or go into the PAC box?
Whats next with the ALCHY setting?
- Thread starter V8killR4U
- Start date
Welcome!
By registering with us, you'll be able to discuss, share and private message with other members of our community.
- Joined
- Feb 18, 2006
- Messages
- 10,084
Who's chip? Anyway to add fuel to WOT only. That would be the way yo go.
Dual nozzle? IMO, your running enough alky to support 30psi+.
I'm running a single nozzle, 24-25psi with 23 degrese timing on a 30 over race ported 109. My alky knob is on 6.
Dual nozzle? IMO, your running enough alky to support 30psi+.
I'm running a single nozzle, 24-25psi with 23 degrese timing on a 30 over race ported 109. My alky knob is on 6.
WEll thats whats throwing me off? Im running on the richest setting on my MER and Im running dual nozzle Alchy on only 20lbs of boost.
Now I dont have a double pumper in the car just a REds XP pump. Could this be the reason for having to max everything out and having 805-815 o2's?
Now I dont have a double pumper in the car just a REds XP pump. Could this be the reason for having to max everything out and having 805-815 o2's?
Who's chip? Anyway to add fuel to WOT only. That would be the way yo go.
Dual nozzle? IMO, your running enough alky to support 30psi+.
I'm running a single nozzle, 24-25psi with 23 degrese timing on a 30 over race ported 109. My alky knob is on 6.
Are you running a double pumper? Something on my end isnt making sense. My buddies are running 30lbs on a single nozzle too
Ill check on the next run. I know it should rise 1:1 to boost.
- Joined
- Feb 18, 2006
- Messages
- 10,084
Are you running a double pumper? Something on my end isnt making sense. My buddies are running 30lbs on a single nozzle too
Single pump till the other day. I had to hook up the old Bosch in line pump to keep up with demand. Seems the Buick community has been plagued with a bum batch of walbro fuel pumps. Mine is only a couple month old.
You could have a bad one or just an old tired one. Now the other problem is no alternatives are available.
Rick
Ok I may have figured the root cause of my issue. Well its Dream Cruise Wekend here in Detroit! So yes Im out cruising 
Im sitting at the light and happen to look at my FP guage, i see the pressure going up and up to 60 llbs, I pull over and try to adjust the FP regulator, I backed the screw almost all the way out and no change in FP. I tried to adjust the FP by backing the screw in and out (no pun intended) lol. With no consistant change.
So it looks like I may have a bad FP regualtor, Ive had it for quite some time, maybe its time for a new one (8 years almost) or maybe its a fuel filter issue or fuel pump. But i think its the FP regulator since the FP went up to 60lbs line on. So the pump is flowing and the filter isnt clogging it up.
I think its the FP reg. Imma try my buddies tomorrow.
So my question to you is; would this be the reason that at one time my pump speed was at 3 with the dual nozzle alchy and was to much fuel at 15-16 llbs of boost and now I turn it up to 20lbs yesterday and I have the chip at the richest setting at WOT and the alchy pump speed is at 8 and my o2's are at 805-815 (BArely rich). Do you think its the FP regulator?
Im sitting at the light and happen to look at my FP guage, i see the pressure going up and up to 60 llbs, I pull over and try to adjust the FP regulator, I backed the screw almost all the way out and no change in FP. I tried to adjust the FP by backing the screw in and out (no pun intended) lol. With no consistant change.
So it looks like I may have a bad FP regualtor, Ive had it for quite some time, maybe its time for a new one (8 years almost) or maybe its a fuel filter issue or fuel pump. But i think its the FP regulator since the FP went up to 60lbs line on. So the pump is flowing and the filter isnt clogging it up.
I think its the FP reg. Imma try my buddies tomorrow.
So my question to you is; would this be the reason that at one time my pump speed was at 3 with the dual nozzle alchy and was to much fuel at 15-16 llbs of boost and now I turn it up to 20lbs yesterday and I have the chip at the richest setting at WOT and the alchy pump speed is at 8 and my o2's are at 805-815 (BArely rich). Do you think its the FP regulator?
- Joined
- Feb 18, 2006
- Messages
- 10,084
Yes, it could very well be your regulator. 
Well tried a new FP regulator and same issue.
Set Fp at 40lbs line off things seemed fine. After driving around for a while FP started to go up again all the way to 70lbs. Tried to adjust the FP reg and it wouldnt correct the FP. Parked the car FP dropped back down drove it home.
What could be causing this issue?
Set Fp at 40lbs line off things seemed fine. After driving around for a while FP started to go up again all the way to 70lbs. Tried to adjust the FP reg and it wouldnt correct the FP. Parked the car FP dropped back down drove it home.
What could be causing this issue?
- Joined
- Aug 1, 2003
- Messages
- 9,700
with a 71gtq, 75#(msd) injectors and duall nozzles (M10 and M15) and a V2 intercooler , iron heads
running 25psi boost im at 62% injector , alky gain at mid way (old controller ) about 4- 4 1/2 on the new controller with 93 octane at 25degrees timing
this is enough to support mid 10s 128 even in th heat (90+ track temps)
i am running dual pumps but lines are stock and pressure is as it should be for boost
running WB correcting at 11.2 AF , zero KR , 1585 egt (narrowband denso o2 sensor in DP shows 850s through run, when i had it before turbo would show low 700s top of track)
every car is different in what it needs
some guys like to max the alky and cut fuel back , in that case i would be under 62% inj duty ,but then with more methanol in the mix I would need to run a richer A/F like 10.XX
what is your injector duty at and what is your 1/4 MPH ?
low fuel pressure for boost could account for the need for more fuel (high injector duty) , check your regulator vac lines
high FP at idle is usually a restricted return line
running 25psi boost im at 62% injector , alky gain at mid way (old controller ) about 4- 4 1/2 on the new controller with 93 octane at 25degrees timing
this is enough to support mid 10s 128 even in th heat (90+ track temps)
i am running dual pumps but lines are stock and pressure is as it should be for boost
running WB correcting at 11.2 AF , zero KR , 1585 egt (narrowband denso o2 sensor in DP shows 850s through run, when i had it before turbo would show low 700s top of track)
every car is different in what it needs
some guys like to max the alky and cut fuel back , in that case i would be under 62% inj duty ,but then with more methanol in the mix I would need to run a richer A/F like 10.XX
what is your injector duty at and what is your 1/4 MPH ?
low fuel pressure for boost could account for the need for more fuel (high injector duty) , check your regulator vac lines
high FP at idle is usually a restricted return line
8 doesnt mean your alky is on max, that means the slope on the curve(alky pressure vs boost) is on max. Think of it this way, the pump on twins should pressurize to 150+ PSI of alky. Now if you ran 150 PSI of pump pressure and the kit activated at 7 PSI.. the motor would drown. make sense?
So to max out the kit you'd probably would need to run 24-26 PSI of boost with factory settings on position 8.
On twin kits.. you set the knob to like 6 and leave it alone. Fix your fueling issues with gasoline not alky. This gasoline(FP reg, fuel pump, lines, etc) you need to dig and find the source of your issues.
And careful.. leaning out an engine.. is bad newzzz.
- Joined
- Feb 18, 2006
- Messages
- 10,084
Rig up a tempory hose off the regulator into a gas can. run the car and see if it does the same thing. If the regulator checks out then replace the return line back to the tank for it is prolly coroaded.
Look at fuel pressure. If your return is bad, fuel pressure will keep rising and not drop.
So start with a good quality guage.. put it on the windshield.. and see where your at.
Well after trying two FP regulators and having the same issue as you mentioned, Im assuming that is the problem, but I want to know is how do I clear the return line of any debris. Compressed air, an additive, what?
GNVYUS 1
Well-Known Member
- Joined
- Dec 15, 2002
- Messages
- 4,364
If you're running one pump then this issue is not because the pumps volume is too much, if you had twins then maybe but 70psi is a ton of idle pressure even for twins.
I highly doubt the 2nd reg is bad so blow compressed air through the old one first and see if anything changes. Might want to have an extra person crawl under the tank to hear if the line is blowing freely. If this fails then consider running a new SS stock line or a -6 back to the tank.
800's + on millivolts is safe but it's safer to tune with a wideband to know what's really happening but I'd bet you're down in the low 11:1 ratio if not high 10's with that reading. IMO time to add more timing and get it around 11:5 to make more power.
I highly doubt the 2nd reg is bad so blow compressed air through the old one first and see if anything changes. Might want to have an extra person crawl under the tank to hear if the line is blowing freely. If this fails then consider running a new SS stock line or a -6 back to the tank.
800's + on millivolts is safe but it's safer to tune with a wideband to know what's really happening but I'd bet you're down in the low 11:1 ratio if not high 10's with that reading. IMO time to add more timing and get it around 11:5 to make more power.
Similar threads
