i am doing a secondary delete tomarrow for.... - ZR-1 Net Registry Forums

sammy · 04-24-2011

a friend . we have marks prom allready . is there any tip someone can share as to the best way to wire open the secondaries .thanx for any help you can provide

GOLDCYLON · 04-24-2011

Dom did this fairly recently as did Andrew I believe

ZR1@gmx.com · 04-24-2011

Quote:

Originally Posted by sammy

a friend . we have marks prom allready . is there any tip someone can share as to the best way to wire open the secondaries .thanx for any help you can provide

It is fairly straight forward to just remove the plates, bearings and all, then plug the holes. I think I have some photos I will try to dig up!

sammy · 04-24-2011

the person i am doing it for doesnt want to remove the plates or butterflies as he will have to pass ca smog once every 2 years . do we have to remove the actuators? and what does everyone use to keep them open /?

mike100 · 04-25-2011

what if you leave the actuators for now and just hook them to manifold vacuum?

that will force them open to test out your chip function. Other than that, I almost want to suggest an old fashioned pull cable like on a choke for a carbed car. need to do it twice though.

Paul Workman · 04-25-2011

Quote:

Originally Posted by mike100

what if you leave the actuators for now and just hook them to manifold vacuum?

that will force them open to test out your chip function. Other than that, I almost want to suggest an old fashioned pull cable like on a choke for a carbed car. need to do it twice though.

Well, a little easier than that, actually. Dom used a plastic tie-wrap to strap the throttle plates open.

Also, you then need the chip programmed to run the secondary injectors "full" time and halve the primary dwell time (closed loop). The vacuum line is disconnected from the vacuum sensor to be exposed to atmospheric pressure which the new program reads as "normal" i.e., no codes are thrown sans vacuum.

To return to stock, just snip the tie-wraps, swap the chip, restore the vacuum circuit and it's good to go.

But, ya know...I would be tempted to see if it would pass emissions testing with the secondaries open. The stock tune at the low end of the rpm band, according to Marc, is a little "fat" anyway. So...it raises the question: Will it pass regardless of the secondary system being nulled? Just a thought.

As for the "choke cable" scenario, that is intriguing! An external actuator, if you will, would eliminate a plenum pull. Tho pulling the plenum is a snap, (once you do it a couple times to establish a routine) the fewer times those connectors are pulled apart and reinstalled...the better, I recon!

P.

Paul Workman · 04-25-2011

Quote:

Originally Posted by GOLDCYLON

Dom did this fairly recently as did Andrew I believe

Yep. But, that was on the car he wrecked. His "Roza Nero" has the secondaries removed entirely (he said last Saturday).

P.

VetteMed · 04-25-2011

No secondaries here! Love it!

GOLDCYLON · 04-25-2011

When the new block goes in Im doing this as well. Andrew are there any SES codes when you do this ?

VetteMed · 04-25-2011

Quote:

Originally Posted by GOLDCYLON

When the new block goes in Im doing this as well. Andrew are there any SES codes when you do this ?

First time around I had some lean codes, even with the Haibeck chip. However, those disappeared after new FIC injectors and new fuel pumps were installed. Not a peep out of the ECM since then

Andrew

04-24-2011	#1
sammy Join Date: Jun 2010 Location: back in lone pine Posts: 591	i am doing a secondary delete tomarrow for.... a friend . we have marks prom allready . is there any tip someone can share as to the best way to wire open the secondaries .thanx for any help you can provide

04-24-2011	#2
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: i am doing a secondary delete tomarrow for.... Dom did this fairly recently as did Andrew I believe __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V

04-24-2011	#4
sammy Join Date: Jun 2010 Location: back in lone pine Posts: 591	Re: i am doing a secondary delete tomarrow for.... the person i am doing it for doesnt want to remove the plates or butterflies as he will have to pass ca smog once every 2 years . do we have to remove the actuators? and what does everyone use to keep them open /?

04-25-2011	#5
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: i am doing a secondary delete tomarrow for.... what if you leave the actuators for now and just hook them to manifold vacuum? that will force them open to test out your chip function. Other than that, I almost want to suggest an old fashioned pull cable like on a choke for a carbed car. need to do it twice though.

04-25-2011	#8
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: i am doing a secondary delete tomarrow for.... No secondaries here! Love it! __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)