LPE 475: Should I Eliminate Secondary Stuff If Changing Injectors?????

[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.

[efnfast]

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]

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

[XfireZ51]

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

Steve

With proper tuning shouldn't make any diff.

[GOLDCYLON]

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

[WARP TEN]

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]

Tech Info - LT5 Eliminated Systems (http://forums.corvetteforum.com/c4-zr-1-discussion/2942569-tech-info-lt5-eliminated-systems.html)

Tech Info - RC SL4-205 injectors (500+ hp) Calculations (http://forums.corvetteforum.com/c4-zr-1-discussion/3005470-tech-info-lt5-modifications-rebuild-tricks-500-hp-5.html#post1581825090)

Using links to the CF?

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

[Pete]

Do you have emmisions in your state?

Pete

[Kevin]

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 :p

........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]

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.

:cheers:

David

[alnukem]

Actually, I currently live in a county that does require emmissions, but, only if you drive a car more than 5,000 miles in a year. But, I will be transfering my residencey to Ohio on Jan 1. They have no emississions tests.

[alnukem]

I will do wires while I'm there.

Coil Packs

....Is there a good test?
....Good quality Replacements?
....Aroundabout Cost?

Thanks all to have responded. No one around here knows anything about these!!!!!

[Paul Workman]

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

Properly tuned in closed loop, (read: oxygen sensors engaged), mpg could actually improve.

That said, benefits far outweigh keepin' 'em, IMO!

[tpr60]

Just wondering has anyone removed the secondaries and passed California emission test??

[sammy]

yes . i did the labor for a guy in porterville . we removed the secondaries and used marks reprogrammed prom and it passed . he sold the car since then and told the buyer passed also.

[scottfab]

I empty the ash tray when it gets full of paper etc.
I could just toss it but what he heck.
Things that break on the car I just fix.
When it comes to the secondaries it's the same.
I fixed them in 99 and they worked fine until this year.
I rebuilt the air pump and I'm good to go for another decade.

One big reason I leave the secondaries in is to be able to remove
the power key any time i let someone drive it.
And it's a good conversation point.

Other systems that get pull that I choose not to are:
1. tire sensors
2. air bag
3. Cats
4. Bose system
5. FX system