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06-09-2020
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#1 |
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Join Date: Nov 2018
Location: Washington
Posts: 98
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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
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06-09-2020
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#2 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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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 
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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 06:40 PM. |
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06-09-2020
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#3 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,162
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Re: Eliminating the secondaries
I still have my secondaries.. they still work fine
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-09-2020
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#4 |
 
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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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...
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[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] |
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06-09-2020
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#5 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,702
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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.
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[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 |
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06-09-2020
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#6 |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Eliminating the secondaries
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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 |
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06-09-2020
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#7 | |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,162
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Re: Eliminating the secondaries
Quote:
 However, while apart that is a good thing to inspect
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-18-2020
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#8 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Eliminating the secondaries
Quote:
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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06-19-2020
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#9 | |
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Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,162
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Re: Eliminating the secondaries
Quote:
Same with my fuel pumps
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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06-18-2020
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#10 | ||
  
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,797
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Re: Eliminating the secondaries
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I did replace all secondary vacuum system for $100. New Secondary Port Throttle Vacuum System Quote:
 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
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Left Clickable links  -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 06-18-2020 at 03:58 PM. |
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