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What settings for my S-AFC after this stuff goes on?

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Old Aug 1, 2004 | 01:55 PM
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What settings for my S-AFC after this stuff goes on?

Here is my problem, I have to drive about an hour and a half away to get my car tuned after the new turbo and parts go in. Below is what my setup will be, and I am not sure what a safe setup would be to make the trip up to get it tuned.

S-AFC (Not II)
RB 3" Turboback
BNR Stage II Turbo
A'pexi Intake
Walbro 255
720cc Secondaries
Stock Primaries
FCD

Also, all this stuff will be on an 89' TII.
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Old Aug 1, 2004 | 03:31 PM
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HI!
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From: tatooine
shold be ok just take it easy on your way there.
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Old Aug 1, 2004 | 04:24 PM
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Originally Posted by Ocelot
Here is my problem, I have to drive about an hour and a half away to get my car tuned after the new turbo and parts go in. Below is what my setup will be, and I am not sure what a safe setup would be to make the trip up to get it tuned.

S-AFC (Not II)
RB 3" Turboback
BNR Stage II Turbo
A'pexi Intake
Walbro 255
720cc Secondaries
Stock Primaries
FCD

Also, all this stuff will be on an 89' TII.
Above 3800 rpms (4k on the safc) set the correction factor to -13 percent. You now have 2540cc's of fuel instead of 2200.

2200/2540 = .867

1 - .867 ~ 13 percent

I think you are going to want to upgrade to 720cc primaries as well.
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Old Aug 1, 2004 | 06:09 PM
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From: Central NJ
I've heard about people having trouble with 720cc primaries with crappy idles and stuff with a S-AFC.
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Old Aug 1, 2004 | 08:18 PM
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I run 4 x 720's and i have great idle ~800\900 when normal running temp and ~1000 when cold with an S-AFC.
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Old Aug 1, 2004 | 10:51 PM
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Originally Posted by Ocelot
I've heard about people having trouble with 720cc primaries with crappy idles and stuff with a S-AFC.
I run 4 x 720cc with a perfect idle.
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Old Aug 1, 2004 | 11:38 PM
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I have installed 4x720cc injectors and an afc, and have a perfect idle.
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Old Aug 1, 2004 | 11:39 PM
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From: Greenville, NC
put a spike to + 10% at 3000 and 4000 and 0 everywhere else. I know that sounds stupid, but you have to do this or your car will lean out at 3800 because it takes a fraction of a second longer for the 720s to come on, and your primarys will still cut back as though your secondaries come on instantly. 0% above 4000 (with larger injectors) will insure that your new exhaust (no backpressure) doesnt cause you to run lean.
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Old Aug 1, 2004 | 11:40 PM
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car geek
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do that for high and low throttle
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Old Aug 2, 2004 | 12:17 AM
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From: Central NJ
Do I really even need bigger primaries or will I be fine with them only on the secondaries until I can afford them all around? Needing the new turbo sort of jumped up on me and I don't know how much more **** I can buy for this thing before I go bankrupt.
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Old Aug 2, 2004 | 01:05 AM
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Originally Posted by Ocelot
Do I really even need bigger primaries or will I be fine with them only on the secondaries until I can afford them all around? Needing the new turbo sort of jumped up on me and I don't know how much more **** I can buy for this thing before I go bankrupt.
You don't neccesarily need to swap in 720 primaries, but I do think that you will run out of enough fuel to safely run the car at around 9 or 10 pounds. You'll also have to watch how much boost you're running on the primaries alone. Cruising on the highway in 5th gear at 2800-3k, you could easily spool the turbo up fast enough that you're primaries are forced to overcome 10 pounds of boost on a turbo that is flowing more CFM than the stocker.
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Old Aug 2, 2004 | 12:02 PM
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From: Central NJ
Ah *****...anways, say I do go with 720cc's all around, what kind of settings should I run then?
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Old Aug 2, 2004 | 12:27 PM
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So close to 12's!!!
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thats why teh SAFC2 owns. Set the NE points to down from 4000 at 3800, and you dont have to worry about leaning out really.
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Old Aug 2, 2004 | 12:51 PM
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Originally Posted by Ocelot
Ah *****...anways, say I do go with 720cc's all around, what kind of settings should I run then?
Low Map = -23 percent across the board
High Map = Whatever results in a nice A/F ratio at WOT
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