Did you eliminate your Secondary Throttle Vacuum System?
 

Just thinking of eliminating my Secondary Throttle Vacuum System. Having some idle issues and I would like to eliminate that leak possibility.

I'm wondering how many of you guys eliminated that system.

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

Sure did. Allowed injector housing porting to make the most out of 4" pistons and 3.75" stroke crank. LT5 runs flawlessly and never looked back.
Another benefit - 2ndary runners look clean like the primaries always.

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

I eliminated secondaries completely on a 91' but kept the secondaries on several 90s' and a 95'. The Secondaries perform great on the 90s' and the 95' once the vacuum system is restored with no vacuum leaks. And....And....once you have eliminated vacuum leaks, the vacuum leaks do not reappear for a very long time :p

I like that Power Key Option albeit I keep it on Full Power. That Full Power Option is very unique to the ZR-1s :thumbsup:

Kevin did a great "How To" write up on rebuilding the Power Key :thumbsup:
See Item #2 CMHSL LED, Full Power Key and Alternator Pulley

Jerry some time ago had available complete secondary vacuum lines and rubber connectors for the 95' (for around $100 as I recall) but he ran out I guess which is not surprising for such a bargain :)

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

All gone, GREAT!

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

I did, but miss them when it is time to tell the story about the key. "That key is for this, but not anymore."

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

Eliminated the secondary actuation pretty soon after buying the car. Never noticed anything detrimental because if it.

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

Pulled mine out 8 yrs ago when I ported the top end. Runs great. No regrets!

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

I did on my '95. Marc did the work as part of a 510 package. One caveat: When they are eliminated, the injectors are set to run at a 50% flow rate so if you turn off the power key (i.e., return to "normal") the car will run too lean as it would shut off the secondary injectors. (I think I explained that correctly but please chime in if I did not.) I removed the key from the car and put a keychain tag on it to remind a future owner of the situation. --Bob

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

Mine and Ami's switches are hard-wired ON. Made that correction after my switch contacts started getting funky. (Already experienced a burned valve - due (I think) to a injector gone bad.)

Re: Did you eliminate your Secondary Throttle Vacuum System?
 

Secondaries work great on my 90. Love the DR Jekyl Mr Hyde character of the car!

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