LSA from CTS-V
On The Tree
Joined: May 2014
Posts: 144
Likes: 1
From: Northern Virginia
Don,
As Ken said, you can use the OEM ECM, wire in the FPCM and pressure sensor, with the vaporworx and ctsv/zl1 pump. that gets you PWM fuel pressure at OEM specs using oem parts. Make sense? Doing exactly that on the project I'm working on.
https://ls1tech.com/forums/conversio...retro-fit.html
As Ken said, you can use the OEM ECM, wire in the FPCM and pressure sensor, with the vaporworx and ctsv/zl1 pump. that gets you PWM fuel pressure at OEM specs using oem parts. Make sense? Doing exactly that on the project I'm working on.
https://ls1tech.com/forums/conversio...retro-fit.html
Last edited by cryptonomad; Oct 16, 2014 at 09:19 PM.
Thread Starter
Joined: Dec 2006
Posts: 104
Likes: 3
From: Mountain Springs, Texas
Don,
As Ken said, you can use the OEM ECM, wire in the FPCM and pressure sensor, with the vaporworx and ctsv/zl1 pump. that gets you PWM fuel pressure at OEM specs using oem parts. Make sense? Doing exactly that on the project I'm working on.
https://ls1tech.com/forums/conversio...retro-fit.html
As Ken said, you can use the OEM ECM, wire in the FPCM and pressure sensor, with the vaporworx and ctsv/zl1 pump. that gets you PWM fuel pressure at OEM specs using oem parts. Make sense? Doing exactly that on the project I'm working on.
https://ls1tech.com/forums/conversio...retro-fit.html
Ken had extensive dyno tuning "due to the mismatched components" of his system. I am guessing that included the injectors combined with the Vapor Works controller. I am also guessing you will have to do similar tuning with your setup unless you change the injectors. Otherwise you may be running very lean at the top end and risk engine damage...
Just my two cents gained after countless hours on the internet, emailing with Carl, and talking with the GM tech line....
Be sure to post up your results when you get your install up and running.
Thanks,
Don
On The Tree
Joined: May 2014
Posts: 144
Likes: 1
From: Northern Virginia
The Vapor Works controller does not deliver the 65/87 psi boost referenced pressure specified in the GM performance LSA controller instructions (and verified by a call to the GM tech line). This has been confirmed by Carl Casanova, the owner of Vapor Works. Can it be made to work through extensive dyno tuning, yes it likely can. But it will not work with the controller as it comes tuned out of the box.
Ken had extensive dyno tuning "due to the mismatched components" of his system. I am guessing that included the injectors combined with the Vapor Works controller. I am also guessing you will have to do similar tuning with your setup unless you change the injectors. Otherwise you may be running very lean at the top end and risk engine damage...
Just my two cents gained after countless hours on the internet, emailing with Carl, and talking with the GM tech line....
Be sure to post up your results when you get your install up and running.
Thanks,
Don
Ken had extensive dyno tuning "due to the mismatched components" of his system. I am guessing that included the injectors combined with the Vapor Works controller. I am also guessing you will have to do similar tuning with your setup unless you change the injectors. Otherwise you may be running very lean at the top end and risk engine damage...
Just my two cents gained after countless hours on the internet, emailing with Carl, and talking with the GM tech line....
Be sure to post up your results when you get your install up and running.
Thanks,
Don
Thread Starter
Joined: Dec 2006
Posts: 104
Likes: 3
From: Mountain Springs, Texas
Thanks, this is the information I was looking for.
Don
TECH Fanatic
Joined: Jul 2008
Posts: 1,570
Likes: 173
I couldn't run the stock controller because of not using the 6L90E trans.......its all tied together...........I know Nickey did a lot of Tweaking on my set-up.........we were just talking about doing the pulley upgrade along with a few other things and at that point they said we would need to modify the fuel system and Injectors..........I didn't understand the exact nature of your question.......Sorry
Ken
Ken
Thread Starter
Joined: Dec 2006
Posts: 104
Likes: 3
From: Mountain Springs, Texas
I couldn't run the stock controller because of not using the 6L90E trans.......its all tied together...........I know Nickey did a lot of Tweaking on my set-up.........we were just talking about doing the pulley upgrade along with a few other things and at that point they said we would need to modify the fuel system and Injectors..........I didn't understand the exact nature of your question.......Sorry
Ken
Ken
Thanks Ken,
Don
Carl has already confirmed that his system cannot support the requirements of the stock LSA controller. I read your thread and it seems that you had extensive dyno tuning done. I suspect part of this tuning was to compensate the difference between the fixed Vaporworks 60 psi versus the stock LSA tune boost referenced 65/87 psi. My goal is to avoid tuning and to use the stock controller as programmed.
I agree, the Vaporworks is a great product. It just can't support the specified LSA requirements without extensive tuning. This is also the reason that Spearworks supplies new injectors with their LSA setup, to allow fixed pressure without boost referencing. It would be interesting to see the duty cycle of the injectors in your tune at WOT Ken.
Thanks,
Don
I agree, the Vaporworks is a great product. It just can't support the specified LSA requirements without extensive tuning. This is also the reason that Spearworks supplies new injectors with their LSA setup, to allow fixed pressure without boost referencing. It would be interesting to see the duty cycle of the injectors in your tune at WOT Ken.
Thanks,
Don
The GM spec's are incorrect for the LSA/E-Rod. The fuel delivery requirement for all GM LSA crate engines is the same. The 87psi is what is needed for the ZR1, not the LSA.
A new version of the instructions should be released soon with a much more practical fuel pressure range. Using the standard VaporWorx PressureWorx system should work quite well in manifold referenced mode. http://www.chevrolet.com/content/dam...19260164-1.pdf
It made no sense that the fuel pressure requirement for any of the LSA-based crate engines had a fuel delivery requirement far, far outside of the performance envelope of the ZL1 and CTS-V fuel modules.
Carl Casanova
VaporWorx
Last edited by CarlC; Feb 20, 2015 at 01:24 AM.
