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what size injectors?

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Old Mar 24, 2015 | 09:38 PM
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Default what size injectors?

guys looking too buy a few finishing pieces too my build and this is one thing I don't know which size too buy. Its a 6.0, 10:5:1, 243 heads, custom grind cam 600 lift 23x/24x @.50, 92mm fast intake. What size injectors do I get for that setup?
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Old Mar 24, 2015 | 09:59 PM
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36lb...you can find sets of rebuilt units that were used in 3800 supercharged engines for around 100-140.00. I am thinking about buying a set because they are suppose to be easy to tune. Another option is stock LS3 injectors but you will need the adapter harnesses and spacers.
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Old Mar 25, 2015 | 10:14 AM
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I was thinking the 36lb and where can you buy those 36lb injectors from a 3800 series engine
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Old Mar 25, 2015 | 12:29 PM
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You could run the 42lb/hr green top injectors, or anything in the 42 to 44lb/hr range. Might as well give yourself a little more room to grow if you ask me. I run the Accel 44lb/hr injectors and love them.
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Old Mar 25, 2015 | 11:12 PM
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Accel have the worst spray pattern for a NA car. I had a set in another car and they spray like a hoze nozzel...they were swapped for a different set and the car quit loading up so bad at idle. FIC injectors posted a vid of all the different injector types and spray patterns on a flow bench. Accels **** a stream, Bosch spray a fine mist.
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Old Mar 26, 2015 | 07:12 AM
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Originally Posted by kinglt-1
Accel have the worst spray pattern for a NA car. I had a set in another car and they spray like a hoze nozzel...they were swapped for a different set and the car quit loading up so bad at idle. FIC injectors posted a vid of all the different injector types and spray patterns on a flow bench. Accels **** a stream, Bosch spray a fine mist.
Never had one issue with how my car idles or drives.
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Old Mar 26, 2015 | 07:19 AM
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I run Bosh 42's in my HCI and 6.0. They work just fine and I like that i have room to grow
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Old Mar 26, 2015 | 07:28 AM
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Originally Posted by camonlyss
I was thinking the 36lb and where can you buy those 36lb injectors from a 3800 series engine
You can get them on Ebay. Look for MotorMan or Injector-Rehab. When these 3.8L supercharged GTP injectors get 58# of fuel pressure from your FPR they spray 42#
I've read that you want the smallest injector that can support the horsepower your making; that a big-short shot of fuel is not as good as a smaller-longer spray. Smaller atomizes better. That said, I think the Ford 30# would be too small for the power you'll be making.
Kinglt-1 , where is a easy injector calculator ?
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Old Mar 26, 2015 | 07:56 AM
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Ya I cant say I've heard great things about accel. I would either go ls3 or get the oem bosch gtp injectors. both will be cheaper than accel.
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Old Mar 26, 2015 | 08:20 AM
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Originally Posted by squalor
You can get them on Ebay. Look for MotorMan or Injector-Rehab. When these 3.8L supercharged GTP injectors get 58# of fuel pressure from your FPR they spray 42#
I've read that you want the smallest injector that can support the horsepower your making; that a big-short shot of fuel is not as good as a smaller-longer spray. Smaller atomizes better. That said, I think the Ford 30# would be too small for the power you'll be making.
Kinglt-1 , where is a easy injector calculator ?
Check this link.

http://ls1tuningguide.com/tuninghelpfiles.php
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Old Mar 26, 2015 | 08:22 AM
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Originally Posted by HCI2000SS
I run Bosh 42's in my HCI and 6.0. They work just fine and I like that i have room to grow
Yea those GTP injectors actually flow around 42lb at 4 bar(58psi). 140.00 and they come with flow data.
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Old Mar 26, 2015 | 10:38 AM
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So I think that link said the Ford Motor sports fms-m-9593-bb302 would flow 35.7 gph with 58# regulator.
I was thinking of a calculator not as elaborate. Like this one:

Last edited by RPM WS6; Mar 29, 2015 at 06:49 PM. Reason: non-sponsor link removed.
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Old Mar 29, 2015 | 11:05 AM
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I ran those white GTP Bosch 3's and loved them. Great injector. At 460/420 I was at 77% IDC at WOT, which was pretty ideal for my setup.
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Old Mar 30, 2015 | 12:07 AM
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Anybody know where to get those little blue seals that reside in the injector connector? I lost one today wrenching on the car.
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Old Mar 30, 2015 | 08:22 AM
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Originally Posted by kinglt-1
Anybody know where to get those little blue seals that reside in the injector connector? I lost one today wrenching on the car.
Not offhand. Probably get in touch with Raceteonix or FIC. They'd have them.

Have you checked inside if the intake runners of the head? I've had one fall down there before
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Old Mar 30, 2015 | 08:52 AM
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Originally Posted by dr_whigham
Not offhand. Probably get in touch with Raceteonix or FIC. They'd have them.

Have you checked inside if the intake runners of the head? I've had one fall down there before
Ok thanks! heads are off the car now, i will check inside the intake runners today.
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Old Mar 30, 2015 | 09:12 AM
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Originally Posted by Rise of the Phoenix
You could run the 42lb/hr green top injectors, or anything in the 42 to 44lb/hr range. Might as well give yourself a little more room to grow if you ask me. I run the Accel 44lb/hr injectors and love them.
Good advice on the 42LB injectors and room to grow.
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