Yes two separate thoughts there Simon I was tryin to say I hate that b1010 table. :thumb: an that timing plus higher rail pressure at cruiseing speeds modified in the fuel pressure base tables will do good on MPG IMO
Tuning larger injectors for mileage
- Thread starter TheBac
- Start date
On the lb7 it is b0905 to b0907 If you lowered these number to where your baro is it will always run in table C
-iat adjustments are not used
-ect is only used untill the truck is at op temp but you can either adjust your timing ECT table or simply lower the number in the multiplier
i adjust time ect but for best results just let the truck run up to normal op temp
- timing for fuel temp is only used when fuel temp reaches 212f so monitor fuel temp and anything below its not being used
-inj timing after pilot. D is most used as it is when your truck is at normal op temp. Look at table b0925
Tom basically if your truck is at normal temp you only worry about timng C after D
a lot can be done to make your truck just run these table ONLY if you set up paremeters to do so.Does that help?
gotcha
b1010 table is a very powerful table it can overide alot of other tables i dont like how the scan link doesnt work with it though.
i like the added time and maybe a bit of pressure boost with a vvt can have some major effects also DP gauge can help with that
This is what I was thinking too. The regulator just has two dinky O-rings and is no way on the high pressure side.
Before my fprv started having issues I ran 159MPA consistenly with a 2600-3200us pulse just a lift pump. It really helps fuel pressure with big fuel. When you add pulse you have a lot more mm3 per second than that table says.
I don't get it? Higher pressure helps maintain big pw??
If you look at commanded mm3 and what actual press is then you can c what your pw is. If you increase press then you just move to a different pw cell
Sorry, I just meant that when I changed this table a long time ago I think I remember that at WOT at 100mm3 this table was only reaching the 44 or 52k cell and not the 66k cell where the stock setting is 0 so you can zero it out in the 44 or 52k cell. I don't remember how I figured it out because the scan tool dosent highlight the cells in this table.
Just an update on mileage Tom. My stock setup was doing about 14-16 average. After all my upgrades in my sig with the stock tune I went up to 17.5-18. I just filled up last night with running a minimum of 9° at cruise and I'm up to 19.3 with roughly the same driving. I have fuel limited to where there is no smoke at all and have the Throttle Base table detuned down to about stock power levels. The turbo lag sucks balls but its paying off so far.
I'm by no means a professional tuner though just fyi lol. 4 years of self-taught.
I'm by no means a professional tuner though just fyi lol. 4 years of self-taught.
I put the stock tune back in Saturday. The pressure changes were causing a big surge thru the FPR that I couldnt tune out. I need to buy a new LB7 FPR so all this crap can work correctly.
Lots of good info in this thread, though. Definitely will help.
Lots of good info in this thread, though. Definitely will help.
Tom,
Have you considered messing with {B1014} through {B1019}? You could (theoretically) tune out any surging with the LBZ regulator. However, it would probably be a lot of trial and error. I wish the LB7's used the PID controller like the LMM. I understand the PID theory a lot better.
Actually, after taking a (slightly) closer look, it appears as though the LB7 uses a PI or PD controller. If you could figure out which one, you might be able to research it online and work the surge out.
But, it might be simpler to just buy a LB7 FPR. It would involve less math, for sure!
Have you considered messing with {B1014} through {B1019}? You could (theoretically) tune out any surging with the LBZ regulator. However, it would probably be a lot of trial and error. I wish the LB7's used the PID controller like the LMM. I understand the PID theory a lot better.
Actually, after taking a (slightly) closer look, it appears as though the LB7 uses a PI or PD controller. If you could figure out which one, you might be able to research it online and work the surge out.
But, it might be simpler to just buy a LB7 FPR. It would involve less math, for sure!
I am running a modded LB7 regulator, the same one that caused me problems tuning last year. Found that the LBZ reg wasnt flowing enough fuel for my use when racing, so had to switch back to ol' surgy. I have to buy a new stock LB7 reg. Im getting real good at changing these #%&@* things out.