SVO 30# Injectors Need Info
Thread Starter
Pro
Joined: Jul 2005
Posts: 514
Likes: 110
From: Sacramento, California
Originally Posted by BQuicksilver
Hey, if you want them go ahead. Sounds like you have your mind made up and just wanted someone to validate your wants. I'm just trying to save you $200.
$200 + $400ish for a tune is a lot of $$ for a mod that won't gain you any power on the fueling end. If you're tuning the headers anyway go ahead...I'm just saying at your power level you won't get anything powerwise. Guys that say it has gained it through the tune...not the injectors.
Patches, I respect your knowledge, but how was the difference "noticeable"? Some thing else was wrong if you were getting big power changes when the previous injectors weren't maxed out. By "noticeable" I assume you mean SOTP...no way injectors gave you a seat of the pants gain in and of themselves.
$200 + $400ish for a tune is a lot of $$ for a mod that won't gain you any power on the fueling end. If you're tuning the headers anyway go ahead...I'm just saying at your power level you won't get anything powerwise. Guys that say it has gained it through the tune...not the injectors.
Patches, I respect your knowledge, but how was the difference "noticeable"? Some thing else was wrong if you were getting big power changes when the previous injectors weren't maxed out. By "noticeable" I assume you mean SOTP...no way injectors gave you a seat of the pants gain in and of themselves.
You must understand though, that a tune will usually give you gains throughout the rpm band because of the aif/fuel ratio being corrected for optimal performance, but without efficent fuel delievery these gains cannot been seen. I believe this is what Patches was trying to say.
Safety Car
Joined: May 2000
Posts: 4,827
Likes: 352
From: Albuquerque NM
You do know that those SVO 30# are a HUGE increase over your 26# injectors, right? At GM fuel pressures they are 37# injectors. Even with heads/cam they aren't needed. If you are going supercharger, and want to go way rich for safety, then you could use them properly. With just headers the PCM will be borderline able to keep a proper A/F at idle/low load. They simply squirt too much fuel/sec and the PCM may not be able to turn them on and off again fast enough.
Basically, to solve a non-existant high duty cycle problem you will cause a probable too low duty cycle problem.
I'd be interested in seeing how you pass smog with those. Good luck.
Basically, to solve a non-existant high duty cycle problem you will cause a probable too low duty cycle problem.
I'd be interested in seeing how you pass smog with those. Good luck.
Thread Starter
Pro
Joined: Jul 2005
Posts: 514
Likes: 110
From: Sacramento, California
Originally Posted by 6Speeder
You do know that those SVO 30# are a HUGE increase over your 26# injectors, right? At GM fuel pressures they are 37# injectors. Even with heads/cam they aren't needed. If you are going supercharger, and want to go way rich for safety, then you could use them properly. With just headers the PCM will be borderline able to keep a proper A/F at idle/low load. They simply squirt too much fuel/sec and the PCM may not be able to turn them on and off again fast enough.
Basically, to solve a non-existant high duty cycle problem you will cause a probable too low duty cycle problem.
I'd be interested in seeing how you pass smog with those. Good luck.
Basically, to solve a non-existant high duty cycle problem you will cause a probable too low duty cycle problem.
I'd be interested in seeing how you pass smog with those. Good luck.
Safety Car
Joined: Dec 2001
Posts: 4,295
Likes: 2
From: Indianapolis Indiana
Cruise-In III Veteran
Cruise-In IV Veteran
Originally Posted by Sicvette
Your right I did want someone to validate my wants, dont we all? This is how we learn through each other. Dont take anything personal, I was not trying to be rude, just give my opinion like you have given yours.
You must understand though, that a tune will usually give you gains throughout the rpm band because of the aif/fuel ratio being corrected for optimal performance, but without efficent fuel delievery these gains cannot been seen. I believe this is what Patches was trying to say.
You must understand though, that a tune will usually give you gains throughout the rpm band because of the aif/fuel ratio being corrected for optimal performance, but without efficent fuel delievery these gains cannot been seen. I believe this is what Patches was trying to say.
As mentioned before, guys are safely running well over 400whp and debating the benefit of upgrading injectors with small H/C cars. I'd expect you to be in the 350whp range. Most would tell you without any H/C mods you wouldn't be close to needing injectors.
I fully understand how tuning works, I've tuned my own and other cars. You gain power through the tune by leaning out the mixture...eg using less fuel. Kinda the opposite of what you were saying. The tune doesn't really push the injectors since you remove fuel 99% of the time.
The only effect those injectors (as noted...they're about 37# at 4 bar) will have is to make your idle a little worse. Get them if you want, but we're trying to help you out and tell you that you definitely DO NOT need them.
Pro
Joined: Dec 2004
Posts: 563
Likes: 1
From: Mission Viejo CA
Originally Posted by Sicvette
Hey everyone thanks for your help. I apoligize that I did not give enough information with my question. I will be having LG Pro long tubes hi flow cats and x pipe with a tune done in about 2 weeks. My tuner let me know that usually after a long tube install on a C5 that they tend to run lean and he suggessted that I upgrade to at least a 30# injector.
Sounds like they just plug in and go. I will look into new o rings if they dont come with them already.
Sounds like they just plug in and go. I will look into new o rings if they dont come with them already.
They are plug and play as far as fitment goes however you MUST tune your PCM to adjust for them or you will run very rich. Unless your over 450 HP I personally doubt you really need them but do what you think is right.
Instructor
Joined: Apr 2003
Posts: 224
Likes: 0
From: lexington ky
Injector Size In A 2000?
Corvette fever magazine article( POWER HUNGERY JAN: 2005)that features tony mamo,s car states that the 2000 had 22LB. injectors. Is this correct? If so will the 28LB. injectors from 2001-2004 direct fit in a 2000?
Race Director
Joined: Nov 2005
Posts: 14,553
Likes: 1,549
From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123
St. Jude Donor '08
I put those exact injectors on my Z. They are a DIRECT replacement for stock! You don't have to change a thing. You will need a tune for sure because at GM fuel pressure they are really about 37#. Just as many others said you only need to upgrade to these if you are planning on being over 420RWHP. Any less then that and you can use stock ones.
Last edited by RichieRichZ06; Jan 16, 2006 at 12:30 PM.
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