305cc Injectors and RX7 AFM - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools
Old 11-02-2006, 02:08 PM   #1
Junior Member
Thread Starter
 
Join Date: Jan 2005
Posts: 60
Total Cats: 0
Default 305cc Injectors and RX7 AFM

Just purchased 305cc Injectors and RX7 AFM off of brgracer

Current set up is MBC, IC, AFPR, 190HP Fuel Pump, Bipes, 2.5" exhaust after Greddy DP at 8psi

Want to go to 10psi, read others have similiar set up, just want the details: like fuel pressure, base fuel pressure, how you've adjusted the RX7 AFM, etc to get a good starting point
kevin02 is offline   Reply With Quote
Old 11-02-2006, 02:26 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,860
Total Cats: 1,788
Default

easiest way would be with a wideband.

But you should shoot for about 100psi of fuel pressure at 10psi of boost. Give or take, chances are that might be a little rich, I'm seeing about 11.5-12:1 AFR.

I'm using a vortech FMU so my idle pressure is 35psi and 0 ~hg. pressure 48psi.

Tuning the AFM will be tricky for you, but my is about 3-4 clicks from stock. How Tom had it should be in the general ballpark. Only way to really tell the affect of the unit at idle is watching the adjustments make changes to the wideband readings. One click could take me from a 14.7 idle to a 15.5 AFR idle.
Braineack is offline   Reply With Quote
Old 11-02-2006, 10:21 PM   #3
Junior Member
 
Join Date: May 2005
Location: Tampa, FL
Posts: 150
Total Cats: -6
Default

There is also a finer adjustment (for idle and mid-throttle tip-in) screw that can be accessed by drilling a hole in the AFM. Check out Randy Stocker's AFM page here:

http://members.aol.com/solomiata/airflowmtr.html

The surest way to tell if your mix is too rich is at idle. If it wants to 'hunt' for idle, up & down, up & down, etc., then its too rich. Tightening the spring one or two ticks can make a big diference, so be patient and make small adjustments.

When my car is in good tune, I have NO problems with the idle and it rumbles nicle @ 850 or so RPM.
Hammerhead is offline   Reply With Quote
Old 12-31-2007, 08:02 PM   #4
Newb
 
Join Date: Dec 2006
Location: Kansas City, MO
Posts: 12
Total Cats: 0
Default

I'm gonna be honest guys, there's some good info under that link that everybody keeps citing, but the pic sucks. I've been searching for a while and haven't found anything better. Anyone have any pics that could be more help? I just can't seem to locate the screw needed to adjust the spring tension even though I took the plate off of my RX-7 AFM. Either way, thanks for the help...
Dr. Jekyll is offline   Reply With Quote
Old 01-03-2008, 09:52 PM   #5
Newb
 
Join Date: Nov 2007
Posts: 5
Total Cats: 0
Default

Do you guys with 305's run pig rich at half throttle? Mine did when I had the 305's in.
big-pete is offline   Reply With Quote
Old 01-04-2008, 01:17 AM   #6
Elite Member
iTrader: (8)
 
Join Date: Oct 2007
Location: Dallas
Posts: 1,841
Total Cats: 0
Default

Now were talking, I discovered my pocket book said no to management until I sell the godspeed turbo. I have a fpr and a new aem wideband. U-pull it is down the road! Mabe I'll be finished next weekend!!
I'll try to get pics.
The angles have spoken and singing a new song!

Last edited by Toddcod; 01-04-2008 at 01:25 AM. Reason: it sounded dumb!
Toddcod is offline   Reply With Quote
Old 01-08-2008, 12:24 AM   #7
Junior Member
iTrader: (5)
 
Join Date: Jan 2006
Posts: 345
Total Cats: 0
Default

hammerhead...16psi with no change to your fueling except injectors? shenanigans.
tronik is offline   Reply With Quote
Old 01-08-2008, 12:30 AM   #8
Elite Member
iTrader: (24)
 
Join Date: Jul 2007
Location: Cypress, TX
Posts: 3,778
Total Cats: 35
Default

Holy back-from-the-dead Batman!
Bryce is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 Yesterday 10:04 PM
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Changing from 460cc to flow force 610cc in diypnp 90 Turbo MEGAsquirt 19 10-19-2015 04:23 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM


Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:29 AM.