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C16 in fuel cell=WAY rich.

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Old 05-23-2005, 08:24 PM
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Default C16 in fuel cell=WAY rich.

Hey guys,

I finished up the stand alone fuel system and put C16 in the cell. I went out and did a test run, logged it w/ my F.A.S.T ecu and it's WAY richer now w/ the C16 in there. Right now I spraying 100hp (52 n20 jet, 31 fuel jet) and the air/fuel ratio gets down to 10.2:1 where it use to be at 11.6:1 on 93 octance.

What do you guys think? Should I go down in fuel pressure (currently at 45psi) or put in smaller fuel jets.
Old 05-23-2005, 08:49 PM
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To keep things consistent, I think you'd be better off swapping jets than raising or lowering fuel pressure. Always try to keep that constant as you tune.
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Old 05-24-2005, 10:00 AM
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Originally Posted by foxspy
Hey guys,

I finished up the stand alone fuel system and put C16 in the cell. I went out and did a test run, logged it w/ my F.A.S.T ecu and it's WAY richer now w/ the C16 in there. Right now I spraying 100hp (52 n20 jet, 31 fuel jet) and the air/fuel ratio gets down to 10.2:1 where it use to be at 11.6:1 on 93 octance.

What do you guys think? Should I go down in fuel pressure (currently at 45psi) or put in smaller fuel jets.
Both of your question do the same thing. I would lower the fuel pressure. Just easier and more tunable. 52-31 is one of the richer tune up (if useing NX). Drop the fuel pressure down to 40psi. Try again.
Ricky
Old 05-24-2005, 10:09 AM
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Would have to agree on ajusting the fuel pressure. Changing the fuel jet can (not always) change the A/F more than you might want to. Adjusting fuel pressure gives you smaller incremental changes.
Old 05-24-2005, 02:22 PM
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I hope you two agree.....
Old 05-24-2005, 02:37 PM
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I'll try 40psi and see how that goes, if it's still way rich then I'll go w/ a smaller fuel jet.
Old 05-24-2005, 02:56 PM
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why do you need 117 octane????
Old 05-24-2005, 03:33 PM
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Originally Posted by 93LS1RX7
I hope you two agree.....
Why I hardly ever agree with anyone. lol
Ricky
Old 05-24-2005, 03:34 PM
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I probably don't. I just need something to support 700rwhp/900rwtq.


A couple of guys at NX recondmended C16 and I figured I could run a tad more timing and/or a little leaner and make more power.
Old 05-24-2005, 04:14 PM
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Do you think you'll be changing your O2s on a regular basis or does it not hurt just being the DP fuel?
Old 05-24-2005, 04:21 PM
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Originally Posted by NXRICKY
Why I hardly ever agree with anyone. lol
Ricky
Ain't that the truth! lol

For real though, not everyone has the same thoughts on tuning a vehicle.
Old 05-24-2005, 09:28 PM
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Originally Posted by next
Do you think you'll be changing your O2s on a regular basis or does it not hurt just being the DP fuel?
I'm sure it'd kill my wideband over time, but I'm willing to pay that price.
Old 05-25-2005, 09:28 AM
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Originally Posted by NXJeremy
Ain't that the truth! lol

For real though, not everyone has the same thoughts on tuning a vehicle.
carefull I"M watching you.



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