LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? - ZR-1 Net Registry Forums

alnukem · 11-03-2012

Hi, I have a 90 LPE 475 Package ZR-1 I bought in January 2010. I was using it for a Daily Driver in 2010 & 2011. It started developing what feels like a miss when the secondaries kicked in. If I would turn the Valet switch off, the noise would go away. I scoured this board & pretty much decided to change both sets of injectors, as I think they are still original. Now, a couple of Questions:

1) What are the "best" injectors to use? I don't care about a couple of hundred $$$ difference.

2) Would I be wise to delete all the secondary stuff since I'll be in there?

3) Anything else I should be doing while I'm there?

This is a really cool car. It was John Benders car when he did "One Lap of America" (Came In 5th). When I bought it, the seller really did not know a lot about it. It had all "Bottom of the Page" stuff from Doug Rippie in it. This is a car I will imagine I'll keep forever & I don't have to comply to Emissions Testing. Thanks in advance.

efnfast · 11-03-2012

I'm not the expert, but I'll chime in first.
The 1990 injectors will not tolerate the ethanol in fuel these days, that being said, do not buy GM injectors. Popular choice seems to be Fuel Injector Connection. Popular seems to be the SS, new. As opposed to rebuilt.
I have not done mine yet, maybe this winter. F.I.C. is where I'll shop.

Secondaries.
Some members have had some major engine issuses when the secondaries fall apart and you injest parts. This don't sound good to me.
Rumor has it, if you remove them, you'll loose a couple mpg.

Steve

PhillipsLT5 · 11-03-2012

seconday's removed and accel injectors here, all good, chip will need reburn without secondarys

XfireZ51 · 11-03-2012

Quote:

Originally Posted by efnfast

Rumor has it, if you remove them, you'll loose a couple mpg.

Steve

With proper tuning shouldn't make any diff.

GOLDCYLON · 11-03-2012

Pull em I posted up my argument for doing so. GC

WARP TEN · 11-03-2012

Quote:

Originally Posted by XfireZ51

With proper tuning shouldn't make any diff.

Mark Haibeck says pulling them does not result in any change in mpg or drivabililty and doing so eliminates a lot of potential headaches with vacuum leaks, parts injestion (infrequent), etc. Marc recommended that I pull them when he works on my car this winter and I plan to do so. -- Bob

ZZZZZR1 · 11-03-2012

Quote:

Originally Posted by Dynomite

Tech Info - LT5 Eliminated Systems

Tech Info - RC SL4-205 injectors (500+ hp) Calculations

Using links to the CF?

Don't you have the same links to your solutions on our forums? I'm confused

Pete · 11-03-2012

Do you have emmisions in your state?

Pete

Kevin · 11-03-2012

Quote:

Originally Posted by Dynomite

It appears that these counties in Pennsylvania do not requrire an Emissions test but might require an inspection to make sure there are no modifications.
I doubt anyone would notice eliminated secondaries

........Adams, Armstrong, Bedford, Bradford, Butler, Cameron, Carbon, Clarion, Clearfield,
Clinton, Columbia, Crawford, Elk, Fayette, Forest, Franklin, Fulton, Greene,
Huntingdon, Indiana, Jefferson, Juniata, Lawrence, McKean, Mifflin, Monroe, Montour,
Northumberland, Perry, Pike, Potter, Schuylkill, Snyder, Somerset, Sullivan,
Susquehanna, Tioga, Union, Venango, Warren, Wayne and Wyoming counties.

if his mechanic is anything like mine they won't be checking to make sure the secondaries are still there. I didn't know there was an lpe car running around here, very cool

ZZZZZR1 · 11-03-2012

Quote:

Originally Posted by alnukem

Hi, I have a 90 LPE 475 Package ZR-1 I bought in January 2010. I was using it for a Daily Driver in 2010 & 2011. It started developing what feels like a miss when the secondaries kicked in. If I would turn the Valet switch off, the noise would go away. I scoured this board & pretty much decided to change both sets of injectors, as I think they are still original. Now, a couple of Questions:

1) What are the "best" injectors to use? I don't care about a couple of hundred $$$ difference.

2) Would I be wise to delete all the secondary stuff since I'll be in there?

3) Anything else I should be doing while I'm there?

This is a really cool car. It was John Benders car when he did "One Lap of America" (Came In 5th). When I bought it, the seller really did not know a lot about it. It had all "Bottom of the Page" stuff from Doug Rippie in it. This is a car I will imagine I'll keep forever & I don't have to comply to Emissions Testing. Thanks in advance.

Most of us go with FIC. (www.fuelinjectorconnection.com). Stainless steel injectors

Then Jerry's gaskets. www.jerrysgaskets.com

Might want to consider doing coil packs and spark plug wires while you are there

I removed my secondaries and no issues. Need to retune and reprogram he chip.

David

11-03-2012	#1
alnukem Join Date: Jan 2010 Location: Freedom, PA Posts: 275	LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? Hi, I have a 90 LPE 475 Package ZR-1 I bought in January 2010. I was using it for a Daily Driver in 2010 & 2011. It started developing what feels like a miss when the secondaries kicked in. If I would turn the Valet switch off, the noise would go away. I scoured this board & pretty much decided to change both sets of injectors, as I think they are still original. Now, a couple of Questions: 1) What are the "best" injectors to use? I don't care about a couple of hundred $$$ difference. 2) Would I be wise to delete all the secondary stuff since I'll be in there? 3) Anything else I should be doing while I'm there? This is a really cool car. It was John Benders car when he did "One Lap of America" (Came In 5th). When I bought it, the seller really did not know a lot about it. It had all "Bottom of the Page" stuff from Doug Rippie in it. This is a car I will imagine I'll keep forever & I don't have to comply to Emissions Testing. Thanks in advance. Last edited by alnukem; 11-03-2012 at 07:34 AM.

11-03-2012	#2
efnfast Join Date: Nov 2011 Location: Dunbarton NH Posts: 7,580	Re: LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? I'm not the expert, but I'll chime in first. The 1990 injectors will not tolerate the ethanol in fuel these days, that being said, do not buy GM injectors. Popular choice seems to be Fuel Injector Connection. Popular seems to be the SS, new. As opposed to rebuilt. I have not done mine yet, maybe this winter. F.I.C. is where I'll shop. Secondaries. Some members have had some major engine issuses when the secondaries fall apart and you injest parts. This don't sound good to me. Rumor has it, if you remove them, you'll loose a couple mpg. Steve

11-03-2012	#3
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,446	Re: LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? seconday's removed and accel injectors here, all good, chip will need reburn without secondarys

11-03-2012	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,119	Re: LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? Pull em I posted up my argument for doing so. 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

11-03-2012	#8
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,667	Re: LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors????? Do you have emmisions in your state? Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage