Eliminating the secondaries - ZR-1 Net Registry Forums

Perry Mitchell · 06-09-2020

I am going to remove the plenum on my 91 to replace the injectors. While it is off, I am going to install Jerry's new and improved fuel pressure regulator. I also want to remove all the secondary stuff to make the car simpler. I know Marc has a DVD which describes the removal process but I am wondering if there is a DVD that shows the secondary removal process. Dynomite describes the process with some pictures but I would really like some more detailed information. Perhaps once the plenum is off, his descriptions will make more sense to me. Thanks in advance, Perry

Ccmano · 06-09-2020

No videos that I am aware of. Too many old guys here (till now) that can?t handle a smart phone. The references you mention are very good though. Don?t forget you will need a Haibeck chip to handle the secondary delete in the ECM. Member Domenic Sorresso (Xfirez51) also does them. I have mine deleted, Dominic did the tune. Runs seamlessly! Nice not to have the secondary system issues worry.
H

-=Jeff=- · 06-09-2020

I still have my secondaries.. they still work fine

32valvZ · 06-09-2020

Ditto.... Mine are working as theyre supposed to as well. Im not sure why so many guys dislike one of the features that makes the LT-5 special...

XfireZ51 · 06-09-2020

The simplest thing to do is just tie wrap them open and modify the calibration. That was my first step, then I removed throttle plates and kept throttle shafts in open position again w tie wrap. When I had heads ported. We took out everything.

GOLDCYLON · 06-09-2020

Ahem

http://www.zr1.net/forum/showthread....ht=secondaries

Get rid of them if you are in there.

GC

-=Jeff=- · 06-09-2020

Quote:

Originally Posted by GOLDCYLON

Ahem

http://www.zr1.net/forum/showthread....ht=secondaries

Get rid of them if you are in there.

GC

Just because you had a screw loose (LOL) doesn't mean we all do

However, while apart that is a good thing to inspect

Paul Workman · 06-18-2020

Quote:

Originally Posted by -=Jeff=-

I still have my secondaries.. they still work fine

That's what YOU think!

-=Jeff=- · 06-18-2020

Quote:

Originally Posted by Paul Workman

That's what YOU think!

No, I know they work fine. They will work fine until they don?t work fine

Same with my fuel pumps

Dynomite · 06-18-2020

Quote:

Originally Posted by -=Jeff=-

I still have my secondaries.. they still work fine

My Secondaries are in super shape and my FULL POWER switch is working fine.
I did replace all secondary vacuum system for $100.

New Secondary Port Throttle Vacuum System

Quote:

Originally Posted by Paul Workman

That's what YOU think!

Yes........that is what I think

I think it is a bit foolish to eliminate one of the most unique and selectable and functional options for the LT5 (The Full Power switch on the console).....

And just because you do not want to do a simple fix but rather do a more complex "fix" eliminating the secondaries

06-09-2020	#1
Perry Mitchell Join Date: Nov 2018 Location: Washington Posts: 98	Eliminating the secondaries I am going to remove the plenum on my 91 to replace the injectors. While it is off, I am going to install Jerry's new and improved fuel pressure regulator. I also want to remove all the secondary stuff to make the car simpler. I know Marc has a DVD which describes the removal process but I am wondering if there is a DVD that shows the secondary removal process. Dynomite describes the process with some pictures but I would really like some more detailed information. Perhaps once the plenum is off, his descriptions will make more sense to me. Thanks in advance, Perry

06-09-2020	#2
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Eliminating the secondaries No videos that I am aware of. Too many old guys here (till now) that can?t handle a smart phone. The references you mention are very good though. Don?t forget you will need a Haibeck chip to handle the secondary delete in the ECM. Member Domenic Sorresso (Xfirez51) also does them. I have mine deleted, Dominic did the tune. Runs seamlessly! Nice not to have the secondary system issues worry. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 06-09-2020 at 05:40 PM.

06-09-2020	#3
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,146	Re: Eliminating the secondaries I still have my secondaries.. they still work fine __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

06-09-2020	#4
32valvZ Join Date: Nov 2007 Location: Sunshine State Posts: 1,071	Re: Eliminating the secondaries Ditto.... Mine are working as theyre supposed to as well. Im not sure why so many guys dislike one of the features that makes the LT-5 special... __________________ [B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B]

06-09-2020	#5
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Eliminating the secondaries The simplest thing to do is just tie wrap them open and modify the calibration. That was my first step, then I removed throttle plates and kept throttle shafts in open position again w tie wrap. When I had heads ported. We took out everything. __________________ [SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX

06-09-2020	#6
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,154	Re: Eliminating the secondaries Ahem http://www.zr1.net/forum/showthread....ht=secondaries Get rid of them if you are in there. GC __________________ 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