Injector size help
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Injector size help
I'm gearing up to install a Fore double pump system in my LS3 with the intent to move to E85 for the most part, but will keep flex. I'm currently making 747whp and wouldn't mind a little more power, but I'm not interested in pulleying down currently.
I've been recommended to go in the FIC 1300 range for injectors, but I wanted to double check here as well. Also, my tuner is recommending Fuel Injection Clinic which seemed odd based on most folks preference for FIConnection or ID. Thoughts?
My current setup:
A&A V2 Ti trim supercharger w/ 3.6" pulley
Alky Control dual nozzle meth
Stock fuel pumps with BAP and 80# injectors
BTR Stage II cam
I've been recommended to go in the FIC 1300 range for injectors, but I wanted to double check here as well. Also, my tuner is recommending Fuel Injection Clinic which seemed odd based on most folks preference for FIConnection or ID. Thoughts?
My current setup:
A&A V2 Ti trim supercharger w/ 3.6" pulley
Alky Control dual nozzle meth
Stock fuel pumps with BAP and 80# injectors
BTR Stage II cam
Le Mans Master
Joined: Mar 2006
Posts: 5,775
Likes: 585
From: Texas
If you're happy with your current fuel injectors, then to run E85 you need to increase the size by about 50%. E85 runs about 9:1 air/fuel, gas ar about 13:1 in power enrichment mode. So you need to put injectors about 13/9ths the size you currently have.
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Thanks, sstonebreaker. Based on that it looks like I could go with Fuel Injector Clinic 1200CC and still have headroom.
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Safety Car
Joined: Feb 2003
Posts: 3,845
Likes: 95
From: Springfield MO
I'm gearing up to install a Fore double pump system in my LS3 with the intent to move to E85 for the most part, but will keep flex. I'm currently making 747whp and wouldn't mind a little more power, but I'm not interested in pulleying down currently.
I've been recommended to go in the FIC 1300 range for injectors, but I wanted to double check here as well. Also, my tuner is recommending Fuel Injection Clinic which seemed odd based on most folks preference for FIConnection or ID. Thoughts?
My current setup:
A&A V2 Ti trim supercharger w/ 3.6" pulley
Alky Control dual nozzle meth
Stock fuel pumps with BAP and 80# injectors
BTR Stage II cam
I've been recommended to go in the FIC 1300 range for injectors, but I wanted to double check here as well. Also, my tuner is recommending Fuel Injection Clinic which seemed odd based on most folks preference for FIConnection or ID. Thoughts?
My current setup:
A&A V2 Ti trim supercharger w/ 3.6" pulley
Alky Control dual nozzle meth
Stock fuel pumps with BAP and 80# injectors
BTR Stage II cam
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Instructor
Joined: Jun 2011
Posts: 215
Likes: 14
From: Mansfield Texas
St. Jude Donor '13
ID1300's will give you plenty of capacity but they can still be tuned to not run like a pig on the idle RPM side of the tach. I have a set going in my 416 YSi build with a Fore triple setup. (If I can ever get time to work on it again that is.....)
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Still trying to decide what to do and where to spend my dollars.
I came across a deal on fuel injector clinic 1650s. Is that just complete overkill here? I'm having a hard time getting hold of my tuner this week
Thanks again for all the advice.
I came across a deal on fuel injector clinic 1650s. Is that just complete overkill here? I'm having a hard time getting hold of my tuner this week
Thanks again for all the advice.
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
Kind of, sort of, not really. I've tuned ID1700's on a similar setup to yours and it was fine. I have no idea if the data for FIC 1650's is as accurate though, and that's really the key.. I haven't tuned any of those yet. If the data is good, they'll work fine. If it sucks, they could be a pain.
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
Kind of, sort of, not really. I've tuned ID1700's on a similar setup to yours and it was fine. I have no idea if the data for FIC 1650's is as accurate though, and that's really the key.. I haven't tuned any of those yet. If the data is good, they'll work fine. If it sucks, they could be a pain.
Thanks for the info.
Le Mans Master
Joined: Mar 2006
Posts: 5,775
Likes: 585
From: Texas
Kind of, sort of, not really. I've tuned ID1700's on a similar setup to yours and it was fine. I have no idea if the data for FIC 1650's is as accurate though, and that's really the key.. I haven't tuned any of those yet. If the data is good, they'll work fine. If it sucks, they could be a pain.
Thread Starter
Drifting
Joined: Aug 2016
Posts: 1,273
Likes: 205
From: Kansas City MO
There's a reason the factory puts the smallest injectors they can on the car. Lingenfelter has also said that he aims for an 85% duty cycle on the injectors at max effort on his builds. As I recall, it had to do with homogenizing the mixture as much as possible. This can be more important on cars with ported heads, as the porting jobs can reduce the tumble and swirl actions of stock heads, in the name of maximizing flow.
