supercatxr7
New Member
- Joined
- Sep 8, 2002
- Messages
- 18
Doesn't seem to want to spray when I have pump speed set below 3.5 on the dial. What could it be?
SMC pump speed.......
- Thread starter supercatxr7
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salvageV6
Daily Driver
- Joined
- May 25, 2001
- Messages
- 20,965
Lack of voltage.
Mines on 10 on both cars.
Don't know anyone using that low of pump speed.
7-10 is the normal usage range for that kit from what I've read.
Mines on 10 on both cars.
Don't know anyone using that low of pump speed.
7-10 is the normal usage range for that kit from what I've read.
So is mine..all stock un-opened..
if your turnon point is set to low(boost wise) then when the car hits the turnon it will sputter. So raising the turnon point should cure this problem.
Problem is if you set your turnon point too high..then you get transitional knock. So its a balance.
Also if your fuel pressure is set too high..same condition applies. get it to turnon around the 10-12 lbs range.. And at WOT with boost at 20 PSI..pump 7,8,9,10 will more than likely work.
if your turnon point is set to low(boost wise) then when the car hits the turnon it will sputter. So raising the turnon point should cure this problem.
Problem is if you set your turnon point too high..then you get transitional knock. So its a balance.
Also if your fuel pressure is set too high..same condition applies. get it to turnon around the 10-12 lbs range.. And at WOT with boost at 20 PSI..pump 7,8,9,10 will more than likely work.
Mine is set to come on right before 10# (stock turbo spools pretty quick and sometimes the pump lags) I'm running a Pit Bull chip which from what I've heard are known for running too much advance, so I'm going to start out at 18#. I've run up to 20# momentarily but let off before any KR could be seen. Still trying to tune this thing with the new kit. Thanks for the info.
Get a low timingstreet chip to start with..no high timing race chips..this will get you dialed in pretty fast. Thrasher92, Red's 93, etc. all work generically well. Again too low a turnon will give you stumble with an SMC kit.
Played around with it last night and it will run without stumble coming on at about 10# with pump speed anywhere from 6-10 without stumbling. One thing is strange though, it seems that if I let off the throttle some the car pulls harder, especially when the alky comes one. Not sure if this means that the car is running rich or lean, and why would it run better at PT rather than WOT. IDLE numbers show the following.
IDLE :
RPM- 800
TPS .41
MAF 4-6
02 Xcounts - 0 - 4
02 mv - 0-727
INT - 126
BLM - 105
MAT - 133.7
CTS - 189
Volts 12.7-13.2
IAC - 77 (I know high but shouldn't affect WOT shoud it?)
IDLE :
RPM- 800
TPS .41
MAF 4-6
02 Xcounts - 0 - 4
02 mv - 0-727
INT - 126
BLM - 105
MAT - 133.7
CTS - 189
Volts 12.7-13.2
IAC - 77 (I know high but shouldn't affect WOT shoud it?)
Ya..but your BLM is pegged at 105 which indicates a problem. It sensing the car is too rich at idle and is pulling fuel..your fuelpressure may be jacked way high or you may have a bad MAF..or???? Typically it needs to be as close to 128 as possible..or at some number thats not 105 or 150 which are the usual BLM limits.
Stumble only occurs at part throttle when you barely hit the turnon point..At wot it may/may not pose an issue..
Fix yer BLM's
Stumble only occurs at part throttle when you barely hit the turnon point..At wot it may/may not pose an issue..
Fix yer BLM's
Thanks for the info Razor, I am going to change the springs tomorrow night (since it won't be able to pull squat until they are replaced) and go from there. My ECM problem appeared to have been maybe my laptop. A reboot of the laptop and then the readings were back to normal with no ECM failure codes. Strange stuff. I'll keep you guys posted on what resolves the problem, and I'll have a FP guage on Monday (I hope). Thanks for the help with this...I just can't lose to a stock 4.6 mustang lol.
supercatxr7
New Member
- Joined
- Sep 8, 2002
- Messages
- 18
pump speed..
If the car only likes a pump speed of about 3, does that mean I am using too large of a nozzle and should go smaller? Above three pump speed the car gets too rich and loses power.
If the car only likes a pump speed of about 3, does that mean I am using too large of a nozzle and should go smaller? Above three pump speed the car gets too rich and loses power.
Re: pump speed..
Drop fuel pressure and try running a higher pump speed. You want more alky than fuel.. Tuning the cars fuel map to compliment the alcohol system is a must..and tricky..not too tricky tho
Maybe dropping your nozzle size to 1/2 what you have may work..dunno till ya try. I beleive the stock nozzle is M15..maybe get an 6,8 or 10. would be a shame to run very little alcohol..since it can work wonders in volume.. But if thats what the car likes its what it likes..as soon as it makes more power, it will be thirstier.
Drop fuel pressure and try running a higher pump speed. You want more alky than fuel.. Tuning the cars fuel map to compliment the alcohol system is a must..and tricky..not too tricky tho
Maybe dropping your nozzle size to 1/2 what you have may work..dunno till ya try. I beleive the stock nozzle is M15..maybe get an 6,8 or 10. would be a shame to run very little alcohol..since it can work wonders in volume.. But if thats what the car likes its what it likes..as soon as it makes more power, it will be thirstier.
I can run my pump from 7-10, and can tell just the slightest difference from one to the other. I may have a weak pump (need to get the updated pressure gauge), that or the car runs fine with it turned up that high. I think my main problem is a rich condition (even with the stock hot-wired pump) The static FP is around 45 from what the original owner told me. I'm seeing BLM's around 104 at idle (which is a rich condition) and am going to back the fp off.
