Did you eliminate your Secondary Throttle Vacuum System?

[Dynomite]

Originally Posted by tiegsd

Hmmm, eliminates maintenance issues Vacuum leaks are a one time fix for almost ALL ZR-1s, removes potential catastrophic failures Extremely rare to lose butterfly blade screws, and car runs better?My ZR-1s with Operational Secondaries run perfectly in ALL Modes including Full Power Starting to sound like a really good idea.For some it is a great idea....for others having the initial features fully operational is a Better Idea

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Just Saying

Jerry does have rubber connectors, check valves, vacuum canisters, for the vacuum system which hardened rubber connectors are usually the source of vacuum leaks. Installation of New Secondary Port Vacuum System hoses

[RussMcB]

Originally Posted by XfireZ51

<snip> I was not implying that you were "imagining" a better running motor.

I don't think its any more difficult in modifying the tune using the OEM ECM.
There's many more parameters that an OEM needs to address and configure due to emissions, driveabiity, and fuel consumption considerations. Understanding how to use them actually gives you greater control over the tune. Not having used the software for the MS3, I can't comment further on its usability, but I can say that it is not necessary to ship your prom anywhere in order to make changes.
There's technology available, pretty inexpensively, that makes tuning on a remote basis a possibility.

Good info. Thanks.

[jss06c6]

I kept mine on my '91. Spent a lot of time tuning after addition of headers and SW exhaust. Brought the "entry" point when the secondaries open down and dialed in the port throttle open fuel and spark. Nice to feel them open up early! Car runs like it's pants are on fire at WOT..

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[-=Jeff=-]

Originally Posted by Ccmano

Did MS ever market this system for the LT5? Is it still in your car?
H

Not officially, but it is available, last email I sent them they were in search of an OEM communication document (probably to add the MPG stuff into the code)

That was June.

I have an old link to this:
http://www.megasquirtpnp.com/docs/mspnp_gP_zr9195.php

When I asked in Sept of 2016 about release ETA and pricing I got this:

I'm afraid we do not have an ETA, but this is likely to be one of our more expensive MSPNPs due to the low volume. It's probably going to be in the $2000-2500 range.

I don't think the motivation is there honestly

[janozr1]

YES i DID.
Im happy now, with haibeck chip
jano,Slovenia

[MuRCieLaGo]

That's it, say no more. I'm removing that system and I will send my chip to Marc Haibeck in the next few days.

Originally Posted by GOLDCYLON

I removed them in 2012 and never looked back. One of the butterfly blades broke ingesting the blade and butterfly screw in the top of piston number #2 wedging it open and bending the intake and exhaust valves... I would not of believed that happening or could happen except this was the second time this had happened as last time one of the blades lost the screw on the other side. I suggest if you are in there. Pull em. the secondary system is prone to vacuum failures and leaks and who drives without the car in full power anyway?

The secondary system has two benefits only. Lower emissions and better fuel economy. What you gain is about 1 second response in throttle time, a valley area free of the secondary system with multiple points of failure and the potential of what happened to me in #2014 NOT happening to you. Go boldly.

Debate over.

GC

Wait, I don't understand. Do I have to remove some butterflies from the throttle body or what?

[RussMcB]

Originally Posted by MuRCieLaGo

Wait, I don't understand. Do I have to remove some butterflies from the throttle body or what?

No, you can/must wire the secondary (not TB) butterflies so they are always open.

[GOLDCYLON]

Originally Posted by MuRCieLaGo

That's it, say no more. I'm removing that system and I will send my chip to Marc Haibeck in the next few days.



Wait, I don't understand. Do I have to remove some butterflies from the throttle body or what?

The heads

[XfireZ51]

Originally Posted by RussMcB

No, you can/must wire the secondary (not TB) butterflies so they are always open.

Before eliminating the secondaries completely, I removed the throttle blades from the shafts and zip tied the actuators in full open position. Then put cheater plug into the secondary MAP harness connector. I later eliminated that by modifying the calibration and re-tune of fuel tables.

[MuRCieLaGo]

I thought I only had to remove this?