What size injectors do I need?
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Joined: Apr 2009
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From: Edmonds WA
What size injectors do I need?
My car went to the shop today with a bad exhaust valve (unconfirmed...) and the guy noted I still have stock injectors. I run a bunch of mods like heads, cam, etc.
Do I need to upgrade, and will it be beneficial. If yes, by how much and what size do I need?
Do I need to upgrade, and will it be beneficial. If yes, by how much and what size do I need?
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Joined: Oct 2007
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From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
It depends on what your duty cycle is. The person that tuned the car should have told you if you need bigger injectors or not
Is that a double stack wing on your car or a shadow?
Is that a double stack wing on your car or a shadow?
Thread Starter
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Joined: Apr 2009
Posts: 99
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From: Edmonds WA
Car hasn't been tuned since I've owned it. My mechanic was appalled that I was still running a stock injector.
Thread Starter
Advanced
Joined: Apr 2009
Posts: 99
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From: Edmonds WA
Safety Car
Joined: Oct 2007
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From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
If it has a lot of mods done to it and has never had a tune, it that could end up very bad for you. If the motor is running lean your lucky its still in one piece. If you do put bigger injectors in it you WILL have to get a tune you wont really have a choice. The car wont run right with larger injectors unless its tuned for them.
By the way.............................that is a HUGE wing on the back of that thing.
By the way.............................that is a HUGE wing on the back of that thing.
Last edited by 0331MARINE; Feb 27, 2010 at 02:48 AM.
Racer
Joined: Aug 2005
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You may be running a stock injector that has been resized. My injectors are oem and look stock but they do not flow at oem rates. I calculated the rate I needed and had the rebuilt/resized/flow tested.
Do not spend money on aftermarket injectors. Few people have the proper injector offset tables and there are lots of issues. Yeah, they make them work, and I made some work too, but it isn't as slick as using oems.
Good advice to check the duty cycle.
Do not spend money on aftermarket injectors. Few people have the proper injector offset tables and there are lots of issues. Yeah, they make them work, and I made some work too, but it isn't as slick as using oems.
Good advice to check the duty cycle.
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The SVO red top (36# at C5 fuel pressure) will more than suffice for that setup. They'll support over 450rwhp easily.
42s could be done if you were planning more mods in the future and wanted some room to grow, but are way overkill for what you have now. Definitely go no larger than that, bigger is not always better. Sizing them correctly is the goal.
42s could be done if you were planning more mods in the future and wanted some room to grow, but are way overkill for what you have now. Definitely go no larger than that, bigger is not always better. Sizing them correctly is the goal.