E85 target afr help.
#1
Evolved Member
Thread Starter
E85 target afr help.
Whats up fam. My car is going lean amd dont know what to do.
Fp red
E85
S2
Head studs.
I punch it in 2nd gear and spool up is 12.8 then it drops to 10.8 and upnto 13.4
I dont wana blow my motor. Please help
Oh also wally 450 1450 blue max
Stock fpr,rail,lines. No return mods. Not rewired to my knowledge either.
There is a video link.
Fp red
E85
S2
Head studs.
I punch it in 2nd gear and spool up is 12.8 then it drops to 10.8 and upnto 13.4
I dont wana blow my motor. Please help
Oh also wally 450 1450 blue max
Stock fpr,rail,lines. No return mods. Not rewired to my knowledge either.
There is a video link.
#7
Evolved Member
Thread Starter
Trending Topics
#8
Account Disabled
No, it goes lean when the fuel usage increases because there's then less flow through the regulator.
That's why you test under load as well as at idle.
At 40 PSI at idle with the vac hose ON........that's 50 PSI base pressure from a 43 PSI reg.
Which is what everyone gets when the pump is too big.
That's why you test under load as well as at idle.
At 40 PSI at idle with the vac hose ON........that's 50 PSI base pressure from a 43 PSI reg.
Which is what everyone gets when the pump is too big.
#9
Evolved Member
Thread Starter
No, it goes lean when the fuel usage increases because there's then less flow through the regulator.
That's why you test under load as well as at idle.
At 40 PSI at idle with the vac hose ON........that's 50 PSI base pressure from a 43 PSI reg.
Which is what everyone gets when the pump is too big.
That's why you test under load as well as at idle.
At 40 PSI at idle with the vac hose ON........that's 50 PSI base pressure from a 43 PSI reg.
Which is what everyone gets when the pump is too big.
Have to drill something in the pump hangar.
Anybinput guys? Walbro 450
#10
Account Disabled
It's the regulator.
You'll know this when you remove the return line from the reg........flow it into a suitable container while measuring the pressure at idle.
You'll know this when you remove the return line from the reg........flow it into a suitable container while measuring the pressure at idle.
#11
Evolved Member
Thread Starter
I removed my fuel pump hangar to double check things
, added 2 new thicker o rings to my pump outlet and drilled out my return line siphon to 9/64. I havent done a pull yet.
Target afr is 12.5
Fuel map is. 9.5 were im going lean
Actual afr is. 13.5
What do i need to do to have a closer actual afr to my fuel table?
Injector scaling? Or maf scaling?
, added 2 new thicker o rings to my pump outlet and drilled out my return line siphon to 9/64. I havent done a pull yet.
Target afr is 12.5
Fuel map is. 9.5 were im going lean
Actual afr is. 13.5
What do i need to do to have a closer actual afr to my fuel table?
Injector scaling? Or maf scaling?
#12
Evolved Member
iTrader: (25)
What is fuel pressure when it goes lean? Don't worry about getting the fuel tables to match real world afr's, you'll pull your hair out trying. I will say having 9.5 in the tables and seeing 13+ afr, something is awry. I would say that you should check pressures under load.
you can post your fuel map, sd settings, injector base value and it may lend some more insight, but I would say you definitely have a fuel pressure problem. The return line mods will have nothing to do with your lean problems.
you can post your fuel map, sd settings, injector base value and it may lend some more insight, but I would say you definitely have a fuel pressure problem. The return line mods will have nothing to do with your lean problems.
The following users liked this post:
4b11slayer (Jan 3, 2017)
#13
Evolved Member
Thread Starter
What is fuel pressure when it goes lean? Don't worry about getting the fuel tables to match real world afr's, you'll pull your hair out trying. I will say having 9.5 in the tables and seeing 13+ afr, something is awry. I would say that you should check pressures under load.
you can post your fuel map, sd settings, injector base value and it may lend some more insight, but I would say you definitely have a fuel pressure problem. The return line mods will have nothing to do with your lean problems.
you can post your fuel map, sd settings, injector base value and it may lend some more insight, but I would say you definitely have a fuel pressure problem. The return line mods will have nothing to do with your lean problems.
Thanks for the reply, im on maf. 96530706. .
Return line mod had no difference.
I removed fuel pump hangar to re inspect, nothing caught my eye. I followed diy thread on here for wally 450.
Cut top barb,add 2 orings and reuse oem pump feed rubber.
Used metal clamp to hold pump in place.
#14
Evolved Member
Whats up fam. My car is going lean amd dont know what to do.
Fp red
E85
S2
Head studs.
I punch it in 2nd gear and spool up is 12.8 then it drops to 10.8 and upnto 13.4
I dont wana blow my motor. Please help
Oh also wally 450 1450 blue max
Stock fpr,rail,lines. No return mods. Not rewired to my knowledge either.
There is a video link.
Fp red
E85
S2
Head studs.
I punch it in 2nd gear and spool up is 12.8 then it drops to 10.8 and upnto 13.4
I dont wana blow my motor. Please help
Oh also wally 450 1450 blue max
Stock fpr,rail,lines. No return mods. Not rewired to my knowledge either.
There is a video link.
#15
Evolved Member
Thread Starter
Ive read the 450 wally diy thread here and some say they can lose pressure from hangar.
What about a rewire? Or maybe a faulty relay? For higher loads?
I can punch it and afr does what i want it to do, then im guessing around 20 psi or more it leans.
I can part throttle it to 6k rpm with steady afr. But wot aint having it.