FITECH EFI TUNING tips, info sharing, ideas, settings, etc... - Chevelle Tech
EFI Caution: Beyond here be monsters...

 236Likes
Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 1832 (permalink) Old Apr 12th, 16, 7:55 AM Thread Starter
Lifetime Premium Member
Bob
 
Join Date: Jul 2012
Location: Middle River, MD
Posts: 4,332
Arrow FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Chris had an excellent idea about posting up tuning info, so figured we could have a thread, dedicated to just that.

Feel free to copy and Paste this little cheat sheet, and add and post your info:

ENGINE SIZE:

FITECH SETUP USED:

ENGINE VACUUM:

CAM SETTING (1,2,3, or 4) AND YOUR CAM SPECS:

IAC COUNTS @ idle and cruise

TIMING CONTROL: Y/N?

IDLE RPM:

TARGET IDLE AFR:

ANY ADJUSTED PARAMETERS AND WHY?:

Last edited by rel3rd; Apr 12th, 16 at 8:20 AM.
rel3rd is offline  
Sponsored Links
Advertisement
 
post #2 of 1832 (permalink) Old Apr 12th, 16, 8:16 AM Thread Starter
Lifetime Premium Member
Bob
 
Join Date: Jul 2012
Location: Middle River, MD
Posts: 4,332
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

ENGINE SIZE:
439ci BBC

FITECH SETUP USED:

GO EFI-4, 600hp NA setup w/timing control option

FUEL SYSTEM:
Tanks Inc. tank,
stock 3/8" steel line for feed,
3/8" line for return,
GPA-4 pump (255lph)

ENGINE VACUUM:
7-8" in gear,
11-12 in Park

CAM SETTING (1,2,3, or 4) AND SPECS:
2 runs the best on my car,
233/243@.050, 107lsa

IAC COUNTS @ idle and cruise
6-11 in Park, wide fluctuation in gear and at cruise

TIMING CONTROL: Y/N?
No. Using MSD w/10* bushing
44 degrees total by 3000rpm,
34 degrees initial,
Full Manifold Distributor vacuum

IDLE RPM:
880

TARGET IDLE AFR:
13.6:1

ANY ADJUSTED PARAMETERS & WHY:

-Added 15 to LOOP rate up and LOOP rate down IAC settings (IDLE CONTROL), which (when revved, or warm started) allows and helps get a quicker return down to my commanded idle rpm.
~Default settings gave me a "hanging idle".

-Subtracted 12% of both AFTERSTART and WARMUP fueling in all temperature settings.
~This seemed to cure the cold and warm starting issue I had of idle being real low, for roughly 10 seconds, then "catching up" and idling fine.

-I had played with DFCO (Deceleration Fuel CutOff) settings before I started having all the FCC issues, and had it working quite well. Unfortunately, I didn't write down what I did, and when I was forced to do a total relearn, I will have to start over.
~Sometimes, set at it's default settings, when letting off the gas from highway speeds, the car feels like it wants to surge up and down, which gives a "freight train effect"...tweaking the DFCO to your tastes, and the car's habits, will eliminate that.
I had mine set to where if letting off the gas from highway speeds, it would turn off the injectors (as it's intended to), until I either gave it throttle, or the car was down near maybe 20-25mph. This change really just saves some gas, and does away with the surge you may or may not get. I get it, so will revisit the tweaking again, once weather cooperates.

- RE:TIMING CONTROL.
I was told specifically by FiTech's owner, Ken Farrell, that if your timing/distributor/advance curve was working good, then more often than not, you'll have lackluster results in trying to be smarter than your distributor is, and "making" a new curve. I have decided to not use the function. What I have has worked great, so why mess with it.

There's also a very odd reason that the MeanStreet EFI setup doesn't have Timing Control, but DOES have A/C IDLE CONTROL...
The GO-EFI4, like I have, uses 6 of 6 wires in it's 6 wire connector. The MeanStreet, minus the Timing Control, simply had the room for the extra wire for the AC Idle Control...lol. Personally, I'd love to see that AC idle control on every FiTech setup, even if it's a single wire with a male/female spade connection to use it.

Last edited by rel3rd; Apr 12th, 16 at 8:32 AM.
rel3rd is offline  
post #3 of 1832 (permalink) Old Apr 12th, 16, 10:10 AM
Senior Tech Team
Chris
 
Join Date: Feb 2006
Location: Lincoln pk NJ
Posts: 1,916
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

ENGINE SIZE: 406 sb

FITECH SETUP USED: Meanstreet

ENGINE VACUUM: 6/7"

CAM SETTING (1,2,3, or 4) AND YOUR CAM SPECS: 4 it has a SR 262/269 @ .050"/ .630" net lift Rowdy in my lil engine.

IAC COUNTS @ idle and cruise 8/9

TIMING CONTROL: Y/N? NO

IDLE RPM: 1k

TARGET IDLE AFR: 14.9

ANY ADJUSTED PARAMETERS AND WHY?: Nothing yet

I need to do the adjustments Bob made to have Idle return quicker.

Bob, when you subtract , you move the toggle to the left ?
WHT/73 is online now  
 
post #4 of 1832 (permalink) Old Apr 12th, 16, 10:18 AM Thread Starter
Lifetime Premium Member
Bob
 
Join Date: Jul 2012
Location: Middle River, MD
Posts: 4,332
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by WHT/73 View Post

I need to do the adjustments Bob made to have Idle return quicker.

Bob, when you subtract , you move the toggle to the left ?
I believe so. It should be self explanatory once you're on that screen/section though. There's too much action going on in the shop today, or I'd go power it up and look, but most settings are pretty easy to find and change...

Just make sure to SAVE after any changes...It's not like a tuning software program, like my HPTuners, where you can make dozens of changes, and save the file...this setup seems to need the info saved, as you change it.

1971 Chevelle SS "439" 2.1 tons of fun...
11.31@117 w/4.10's, 4200+ stall, QFT SS-830 carb
11.72@115 w/3.90's, 3300 stall, and Fitech GoEFI4
11.51@116 w/3.90's, 3300 stall, and Holley Sniper EFI
rel3rd is offline  
post #5 of 1832 (permalink) Old Apr 12th, 16, 4:44 PM
Senior Tech Team
Chris
 
Join Date: Feb 2006
Location: Lincoln pk NJ
Posts: 1,916
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

I set mine up like yours with the settings you posted and it really helped the cold start!
I did the loop thing also seems a lil better.
"Seems" to come down quicker.
Here's a pic where it started...then added what you did to both.
Attached Thumbnails
Click image for larger version

Name:	IMG_0323[1].jpg
Views:	6000
Size:	105.2 KB
ID:	349721  

73 nova,3515#(all steel)406ci N/A, best 1/4,1.45 '60,6.75@100.48,10.6 @ 122.38, short shifting,NO tuning!

http://www.youtube.com/watch?v=ng86PsGUcTY
WHT/73 is online now  
post #6 of 1832 (permalink) Old Apr 12th, 16, 8:04 PM
Senior Tech Team
Chris
 
Join Date: Aug 2002
Location: Alberta, Canada
Posts: 4,699
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

I just received my EFI-8 1200 hp unit and I noticed that my secondary throttle blades open a fraction later, and the secondaries also don't open 100%. So those just getting their FiTech units may want to double check as I think their testing may have been rushed and didn't QC each one as they should.

1971 Chevelle SS454 4 speed, 3.31 Posi

Youtube Channel. https://www.youtube.com/user/SS454LS6
-SS454- is offline  
post #7 of 1832 (permalink) Old Apr 12th, 16, 8:50 PM
Senior Tech Team
Chris
 
Join Date: Feb 2006
Location: Lincoln pk NJ
Posts: 1,916
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Cool!
Keep us in the loop.
I think your going to be happy.
I just got my neighbors truck off my lift and went to put my Nova back in the garage and just reached through the window, let it prime and twisted the key!
Lit right off.
Kinda cool, with a big (to me) cam and starts like my wife's LS3.
Thanks for the heads up on the linkage.

73 nova,3515#(all steel)406ci N/A, best 1/4,1.45 '60,6.75@100.48,10.6 @ 122.38, short shifting,NO tuning!

http://www.youtube.com/watch?v=ng86PsGUcTY
WHT/73 is online now  
post #8 of 1832 (permalink) Old Apr 12th, 16, 9:23 PM
Tech Team
Dan
 
Join Date: Mar 2013
Location: Brisbane, Australia
Posts: 111
Garage
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by -SS454- View Post
I just received my EFI-8 1200 hp unit and I noticed that my secondary throttle blades open a fraction later, and the secondaries also don't open 100%. So those just getting their FiTech units may want to double check as I think their testing may have been rushed and didn't QC each one as they should.
My Secondaries were the same on my Meanstreet, rather simple to adjust.

Another observation I made was rich smell of Fuel when initially opened, thought it was just the plastic, but when changing the Inlet Port location had fuel drip out, would assume part of the quality control is to test random Units.

1972 Chevelle - 549ci BBC, FiTech Meanstreet , 680+ TQ & HP - 11.2 @ 123mph
https://youtu.be/eim4WZi7uxw
Harms_Way is online now  
post #9 of 1832 (permalink) Old Apr 12th, 16, 10:09 PM
Senior Tech Team
Chris
 
Join Date: Feb 2006
Location: Lincoln pk NJ
Posts: 1,916
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by Harms_Way View Post
My Secondaries were the same on my Meanstreet, rather simple to adjust.

Another observation I made was rich smell of Fuel when initially opened, thought it was just the plastic, but when changing the Inlet Port location had fuel drip out, would assume part of the quality control is to test random Units.
I had the same smell.
How do you like yours?
I'm hooked!

73 nova,3515#(all steel)406ci N/A, best 1/4,1.45 '60,6.75@100.48,10.6 @ 122.38, short shifting,NO tuning!

http://www.youtube.com/watch?v=ng86PsGUcTY
WHT/73 is online now  
post #10 of 1832 (permalink) Old Apr 12th, 16, 10:53 PM
Tech Team
Dan
 
Join Date: Mar 2013
Location: Brisbane, Australia
Posts: 111
Garage
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by WHT/73 View Post
I had the same smell.
How do you like yours?
I'm hooked!
Mine is still sitting in box, engine is pulled apart, awaiting new parts arrive & to existing parts to return from machine shop, all shall be tested on dyno once together.

Have a feeling that I'm really going to like it though.

1972 Chevelle - 549ci BBC, FiTech Meanstreet , 680+ TQ & HP - 11.2 @ 123mph
https://youtu.be/eim4WZi7uxw
Harms_Way is online now  
post #11 of 1832 (permalink) Old Apr 13th, 16, 12:24 AM
Senior Tech Team
Chris
 
Join Date: Aug 2002
Location: Alberta, Canada
Posts: 4,699
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Can some of you check which hole the adjustable arm that connects the primary linkage to the secondary is set on? Mine is on the top hole, and even adjusted with zero play, it still will not open the secondaries fully.

1971 Chevelle SS454 4 speed, 3.31 Posi

Youtube Channel. https://www.youtube.com/user/SS454LS6
-SS454- is offline  
post #12 of 1832 (permalink) Old Apr 13th, 16, 2:04 AM
Team Member
Rich
 
Join Date: Jul 2015
Location: Rockvale TN
Posts: 1,573
Garage
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by -SS454- View Post
Can some of you check which hole the adjustable arm that connects the primary linkage to the secondary is set on? Mine is on the top hole, and even adjusted with zero play, it still will not open the secondaries fully.
Mine is dead-on even with the primary spring disconnected. No problem with full closure or WOT.

HandOverFist is online now  
post #13 of 1832 (permalink) Old Apr 13th, 16, 7:34 AM Thread Starter
Lifetime Premium Member
Bob
 
Join Date: Jul 2012
Location: Middle River, MD
Posts: 4,332
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Mine is same as one above...

Same unit as well...

1971 Chevelle SS "439" 2.1 tons of fun...
11.31@117 w/4.10's, 4200+ stall, QFT SS-830 carb
11.72@115 w/3.90's, 3300 stall, and Fitech GoEFI4
11.51@116 w/3.90's, 3300 stall, and Holley Sniper EFI
rel3rd is offline  
post #14 of 1832 (permalink) Old Apr 15th, 16, 5:47 PM
Tech Team
Wilson
 
Join Date: May 2004
Location: Madison, NJ
Posts: 634
Garage
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Question on wiring power to a EFI-8 1200HP. What gauge wire to use from Bat to unit? Also are you running the fuel pump wire directly to the in tank pump and using the internal relay? I will be using a Aeromotive Stealth 340 Pump. They said to use 14 gauge wire to the pump. I'm new to the EFI scene.

NAPA PARTS GUY
1970 SS396 Build Sheet Documented
496 10.5 UD Harold 243/249 650 Net SR, AFR/290's, Victor Jr. PS/1000HP, Pump Fuel
3000 Stall TH400 3.55 MT DR's 3980 w/Driver
Best ET 1.54 7.04/96.21 11.17/118.51 @ Musclepalooza Etown 2010
wilmaya is offline  
post #15 of 1832 (permalink) Old Apr 15th, 16, 7:26 PM Thread Starter
Lifetime Premium Member
Bob
 
Join Date: Jul 2012
Location: Middle River, MD
Posts: 4,332
Re: FITECH EFI TUNING tips, info sharing, ideas, settings, etc...

Quote:
Originally Posted by wilmaya View Post
Question on wiring power to a EFI-8 1200HP. What gauge wire to use from Bat to unit? Also are you running the fuel pump wire directly to the in tank pump and using the internal relay? I will be using a Aeromotive Stealth 340 Pump. They said to use 14 gauge wire to the pump. I'm new to the EFI scene.
I have my positive lead going from FiTech harness right to 12 volt alternator stud, and extended the factory Orange lead back to the in tank pump...but I only have a 255lph Walbro.

According to FiTech's owner, you absolutely can run a relay to get adequate power back to your bigger pump. I'm not 100% sure of the factory FiTech orange wire's gauge, but mines soldered and heat shrink tubing'd, so should be fine in my case. If you need larger wire than what it comes with, I'd use a relay.

1971 Chevelle SS "439" 2.1 tons of fun...
11.31@117 w/4.10's, 4200+ stall, QFT SS-830 carb
11.72@115 w/3.90's, 3300 stall, and Fitech GoEFI4
11.51@116 w/3.90's, 3300 stall, and Holley Sniper EFI
rel3rd is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome