[JANNETTYRACING]

Originally Posted by G2K

Got mine installed last night... thanks to your video Rob, also thanks to previous old posts from TMS and Tjay74... all very informative... got my JMS working correctly on my first try and now my low side is constantly over 70psi.. what a thing of beauty... I even saw 80psi at one point.

this is only a 3rd gear pull... I'll run a 1-4 gear later this afternoon if the rain goes away.... Pretty glad I went with the JMS, I thought my pump was failing.

Now @ 5998rpm
AFR 12.1-12.3
low side 76psi
rail 2900psi
inj 5.4 ms

E64 fuel stock LT4 fuel system @ 7.8PSI... It's looking like I can actually pulley down to 10psi... but im already at 619rw... dont know if i should push it more car is running so good.

So for future people reading this post... the JMS is definitely worth it.

Change your Logging channel back over to Lamda and tune for .82 you can be too lean because when you take a EQratio and convert it to AFR in the channel the software assumes gasoline with no ethanol.

Lambda is the same across all fuels.

[G2K]

Originally Posted by JANNETTYRACING

Change your Logging channel back over to Lamda and tune for .82 you can be too lean because when you take a EQratio and convert it to AFR in the channel the software assumes gasoline with no ethanol.

Lambda is the same across all fuels.

thanks for the tip Ted. I will look into that tonight, if math serves me right I maybe around 0.83 Lamba

[JANNETTYRACING]

Originally Posted by G2K

thanks for the tip Ted. I will look into that tonight, if math serves me right I maybe around 0.83 Lamba

If you bring up your commanded AFR Channel you will see what I mean.

No Matter the Ethanol content Your commanded EQ will be .82 but your commanded AFR will change drastically based on content from 14.7 to 7.5

Ted.

[G2K]

Originally Posted by JANNETTYRACING

If you bring up your commanded AFR Channel you will see what I mean.

No Matter the Ethanol content Your commanded EQ will be .82 but your commanded AFR will change drastically based on content from 14.7 to 7.5

Ted.

Ohhh I think I get it. Will look at this over.

BTW Ted, thank you so much for suggesting the JMS BAP in the first place!

[JANNETTYRACING]

Originally Posted by G2K

Ohhh I think I get it. Will look at this over.

BTW Ted, thank you so much for suggesting the JMS BAP in the first place!

You are Welcome, JMS is a staple in all of our builds, I can't stress enough the importance of this add on.

Ted.

[6thgenmadness]

I’m wonder how far this can go if I have lt4 fuel. But a lt1 low side pump? I can’t even. Run e 15. Without low side drop and high side drop. I’ve been tossing around around the idea of a aux pump. Vs the intake and voltage booster

[JANNETTYRACING]

Originally Posted by 6thgenmadness

I’m wonder how far this can go if I have lt4 fuel. But a lt1 low side pump? I can’t even. Run e 15. Without low side drop and high side drop. I’ve been tossing around around the idea of a aux pump. Vs the intake and voltage booster

The JMS will make a significant difference and in my opinion it should be one of the first Mods you cannot go wrong starting there and see where it takes you

[Megahurtz]

Does anyone tune the Fuel Pump Minimum Duty Cycle and VBAT multiplier with the JMS? Or do you just change Max Pressure and Regulation Pressure?

I know the FP Min DC and VBAT helps keep the stock LT4 pump stable when you boost the voltage in the FPCM. But is it needed after the JMS install?

[JANNETTYRACING]

Originally Posted by Megahurtz

Does anyone tune the Fuel Pump Minimum Duty Cycle and VBAT multiplier with the JMS? Or do you just change Max Pressure and Regulation Pressure?

I know the FP Min DC and VBAT helps keep the stock LT4 pump stable when you boost the voltage in the FPCM. But is it needed after the JMS install?

We don't.

[Megahurtz]

Originally Posted by JANNETTYRACING

We don't.

Thanks, Ted!