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Old 02-28-2013, 06:29 AM
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injectors upgrade without turbo upgrade.

Hey guy It looks like i have at least 1 injector going out on my 05 F250, My question is what size over stock can I put in my truck without upgrading my turbo.

I am not looking for crazy horsepower just a fun daily driver. I have studs, egr delete, 4" exhaust, blue spring, and some other stuff but. no programmer looking to upgrade as things break.
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Old 02-28-2013, 07:01 AM
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175/stock is as big as i would go without pulling fuel
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Old 02-28-2013, 07:10 AM
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Even with a 175/stock your going to need fuel pulled.
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Old 02-28-2013, 07:14 AM
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i ran my 190/75's with full fuel on stock turbo with zero issues for over a year and many others have done the same. You'll be fine with a 190cc injector and stock turbo.
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Old 02-28-2013, 07:19 AM
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You have a stock turbo and no tuner. Replace the bad injector with a stock reman and get an SCT X3 or SF3 and some custom tunes. Biggest bang for your buck right there.

Put your mods in your signature so we know what you have. Hard to advise you without knowing that. For instance, do you have a monitor or gauges to know what your engine is doing?
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Old 02-28-2013, 09:07 AM
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Well i plan on getting a tuner, but for the moment I am looking at the bucking issue. I would like to run larger than stock injectors and keep my current turbo set up until it craps out at which time I will upgrade the turbo. kind of an uprade it when it breaks plan.

Correct me if i am wrong but the 155 or 175 number is the capacity of the injector and the 75 number is the nozzle size in percentage over stock size right??

if that is correct going with a larger capacity with a stock nozzle size should give me more fuel at the same injection rate as stock. While going with a 175/75 gives me more fuel and faster??
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Old 02-28-2013, 10:03 AM
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That could be a long time, your turbo may never go south! Since the turbo is the limiting factor to smokeless performance, you would notice a big difference with stock injectors and a hot tune! If you increase your injectors, do the nozzles as well. If you do that, you will need a bigger blower. It all goes together.
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Old 02-28-2013, 10:08 AM
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Quote:
Correct me if i am wrong but the 155 or 175 number is the capacity of the injector and the 75 number is the nozzle size in percentage over stock size right??
Yes

Quote:
if that is correct going with a larger capacity with a stock nozzle size should give me more fuel at the same injection rate as stock. While going with a 175/75 gives me more fuel and faster??
Not necessarily. It could give you more fuel available at lower RPM and a longer PW. However, at higher RPM it will be about the same as a stocker. The issue is if you get new nozzles, their stock may be larger that the originals, or your old ones will be used enough to degrade performance. The real answer lies in ICP, PW and fuel available (bore and nozzle). Flow-testing is the only way to know for sure.
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Old 02-28-2013, 10:11 AM
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Quote:
Originally Posted by dpmac83 View Post
Well i plan on getting a tuner, but for the moment I am looking at the bucking issue. I would like to run larger than stock injectors and keep my current turbo set up until it craps out at which time I will upgrade the turbo. kind of an uprade it when it breaks plan.

Correct me if i am wrong but the 155 or 175 number is the capacity of the injector and the 75 number is the nozzle size in percentage over stock size right??

if that is correct going with a larger capacity with a stock nozzle size should give me more fuel at the same injection rate as stock. While going with a 175/75 gives me more fuel and faster??
So you are leaving important details out. You think an injector is going bad. Why? Now you have a bucking issue. Are you talking about the turbo surging? If so have you cleaned the turbo. The vgt vanes are prolly sticking on you.

Yes on the injector numbers, you have it right.

155/30's and an MTW Stage1 with a billet wheel will be a whole lot of fun.
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Old 02-28-2013, 11:50 AM
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Pgreen... I actually just cleaned the turbo last weekend, It actually didnt look bad at all. I cleaned it anyway. The turbo doesnt surge at all. Just a bucking at lower RPMs and cooler temps . it stops if i make the truck downshift or the truck gets up to operating temps (See post in motor problems forum).
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