[laynlo15]

One other question. I know many are using the JMS like King recommends. It increases the voltage up to about 17.5 volts at WOT but what does that mean in low side Psi increase after installation.

[KingLT1]

Originally Posted by laynlo15

One other question. I know many are using the JMS like King recommends. It increases the voltage up to about 17.5 volts at WOT but what does that mean in low side Psi increase after installation.

Don't go higher then 17.2 volts or the CCM will start to throw codes. Pressure won't change unless you command higher in the tune.

[laynlo15]

Thanks King. If I'm at 70 psi what would you expect to see in an increase in Psi at 17.2. I guess I'm looking at that correctly.

[lt4camaro]

A picture of the last page of Teds dyno printout on my 2021 LT1 on E70 showing fuel psi .

[laynlo15]

Originally Posted by lt4camaro

A picture of the last page of Teds dyno readout on my 2021 LT1 on E70 showing fuel psi .

A little lower than mine but that's probably because you E content was higher so that makes sense to me. Thanks for posting.

[LT1ornothing]

Originally Posted by laynlo15

Yes I do, I probably 200 logs or more between my 16 SS, C7 and my new Camaro. I can't upload the log but here are a couple screen shots from my C7 and Camaro.Attachment 1105540
No idea why this shit turns sideway when it correct in my Photos. Go figure

Originally Posted by lt4camaro

A picture of the last page of Teds dyno readout on my 2021 LT1 on E70 showing fuel psi .

This is excellent gentlemen, thank you for posting the data. Seems like these LT1s may have all come equipped with the LT4 low side pump from the factory.

[lt4camaro]

Originally Posted by laynlo15

A little lower than mine but that's probably because you E content was higher so that makes sense to me. Thanks for posting.

Would there be any difference in what the superflow dyno reads and displays versus a HP tuner ?

[Chrome383Z]

Originally Posted by 1LEornothing

This is excellent gentlemen, thank you for posting the data. Seems like these LT1s may have all come equipped with the LT4 low side pump from the factory.

Lucky asses. I had to drop the tank

[lt4camaro]

Originally Posted by lt4camaro

A picture of the last page of Teds dyno printout on my 2021 LT1 on E70 showing fuel psi .

LT2 intake , ported 87 MM TB supposedly effective 91mm, and Borla s mufflers and E70 , factory modded by me air box thats it. Ted tunes conservative.

[LT1ornothing]

Originally Posted by Chrome383Z

Lucky asses. I had to drop the tank

This is/was my biggest fear for my fuel system upgrade. I have no way of being able to do the required tear down at home to get access to the low side pump. The HPFP and LT4 injectors would be a breeze to do on the driveway. Here's hoping I lucked out and already have the LT4 pump.

[Kerry]

Originally Posted by laynlo15

Yes I do, I probably 200 logs or more between my 16 SS, C7 and my new Camaro. I can't upload the log but here are a couple screen shots from my C7 and Camaro.Attachment 1105540
No idea why this shit turns sideway when it correct in my Photos. Go figure

Interesting im logging fuel pressure sae but it just randomly drops to 0 then comes back. car runs fine.

[Chrome383Z]

Originally Posted by Kerry

Interesting im logging fuel pressure sae but it just randomly drops to 0 then comes back. car runs fine.

My 2019 does the same thing. Seems to be a common thing with 19’s. Why have no clue. Sometimes I’ll get lucky and it’ll read on a pull, most times not.

If I ever really start pushing the fuel system I’ll probably get an analog fuel pressure sensor, temp connect inline after the flex fuel sensor, and buy the MPVI3 to run a signal in to data log. Only way I know to do it.

[Kerry]

from all data for my 19 2 ss

[Kerry]

Originally Posted by Chrome383Z

My 2019 does the same thing. Seems to be a common thing with 19’s. Why have no clue. Sometimes I’ll get lucky and it’ll read on a pull, most times not.

If I ever really start pushing the fuel system I’ll probably get an analog fuel pressure sensor, temp connect inline after the flex fuel sensor, and buy the MPVI3 to run a signal in to data log. Only way I know to do it.

yep same same