50# Fuel Injectors? Really?

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Mar 3, 2010 | 06:46 PM

doje

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From: Fremont CA

St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20

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50# Fuel Injectors? Really?

Posting here in the C6 section because my thread is LS3 related...

Yesterday I ordered a bunch of parts because I am putting an LS3 in my C5 coupe. The new motor will have...

a mild cam (224/230 or so)
FAST 102 intake w/ 102mm TB
LG Pro LT Headers
Callaway Honker CAI.

OK, so I called up Hinson Motorsports to order some parts and also asked them what injectors they recommended. I was kind of shocked when they recommended a 50# fuel injector for this build, but I took their advice and purchased them. Now, I’m wondering if that was the best injector for my needs? Since this is an LS3 (and I don’t want to play around with spacers) my options are 39# or 50#. I’m not really concerned about the price, but I want what is best suited for my needs.

Opinions?

Mar 3, 2010 | 07:00 PM

LSCHLEM

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From: READING PA

St. Jude Donor '08-'09-'10

Seems to me the 50# injectors should be fine. I didn't know 50# injectors were available till now. You have the makings of A 500 RWHP CAR. Go for it.

Mar 3, 2010 | 09:20 PM

NYC6

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From: Long Island New York

My S/C makes 522rwhp and has 60lb Motron injectors. They are the norm for S/C applications in the 500-600rwhp range. 50-60 should be in the ball park for your needs.

Last edited by NYC6; Mar 3, 2010 at 09:23 PM.

Mar 4, 2010 | 12:02 AM

kelp

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From: Roanoke Virginia

Does not sound like you will need them with those mods. There's alot of web programs to estimate your injector requirements. Now. Did they come with tuning parameters? Changing to different injectors involves a bit of tuning. It can be a mess. Not a plug and play bolt on. If in doubt you could have your old ones enlarged at fuelinjectorconnection.com. Less tuning parameters need to be changed that way.

Mar 4, 2010 | 02:37 AM

doje

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From: Fremont CA

St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20

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Quote:

Originally Posted by kelp

The car is getting a completely different motor, cam, intake, headers, throttle body, MAF, gears, you name it. There will be tuning until my tuner turns blue. No worries about trying to save a little work on this one. We will have to start with a clean slate no matter what.

Mar 4, 2010 | 11:16 AM

NIGHTSTALKER

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From: Middletown DE

I was running 42 lb. FAST's with 500/500 with room to spare on my old motor, but the 50's should be fine if you think you will be making that much.

Mar 5, 2010 | 03:54 PM

RichieRichZ06

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From: Supporting the Corvette Community at Abel Chevrolet in Rio Vista, CA 707-374-6317 Ext.123

St. Jude Donor '08

What is wrong with the stock LS3 injectors? They are the same as the LS7 and will easily support ~ 575-600 WHP N/A. I do not think that LS3 is going to make that much.

I do not think my stock injectors have ever seen 95% dc at our HP level.

Mar 5, 2010 | 06:32 PM

doje

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From: Fremont CA

St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19-'20

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Quote:

Originally Posted by RichieRichZ06

Probably nothing wrong with stock other than the fact that I don't have any. I asked hinson what I needed and they said the fast 50's. How much is a set of stickers?