SCT Re-Tune question - Ford Mustang Forum
 
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post #1 of 6 (permalink) Old 10-09-2010 Thread Starter
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SCT Re-Tune question

Although I know that if I search for the threads that I will probably find the answer to my question, I must go to work soon. Hence, I ask fellow AFM members this question.

I have Brenspeeds tune w/ SCT tuner and 87, 91, & 93 octane settings. Until a week after installing the JLT/tuner, we had 93 non-ethanol gas. Now, it's 91. Do I have to go back to stock and then go to 91 octane or just plug it in and go directly to 91 ?

My car has had it's first 93/ethanol tank of gas in 4 years. Mileage way down ( it's not my foot, either ) and wish to use real gas. The car goes like mad but, I have issues that I must contact Brenspeed for next week such as lack of decell when I lift my foot off the gas and the absence of normal "burble" in the exhaust. I don't remember if I told Doug that I run Boom Tube mufflers or if they even affect back pressure. The rest of the exhaust is stock.

Thanks in advance.


2006 GT Premium: Vista Blue, Hurst, CDC shaker, boomtubes,chromed taillight, brake light, & quarter markers trim. JLT/SCT 93 C & M of Hubertus, WI dyno tune, JLT cold air routing to filter. Sequential Tails, Magnetic black out panel.

2004 Crown Victoria Police Interceptor: 70 mm TB, SCT tune, VX mufflers, J-Mod, 3.73 Eaton limited slip, moose tenderizer.

2003 Mercury Marauder: Kooks long tubes, K & N CAI.
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post #2 of 6 (permalink) Old 10-09-2010
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I believe you can go directly to 91. No need to go back to stock.

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post #3 of 6 (permalink) Old 10-09-2010 Thread Starter
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Thanks for the response. How about the exhaust issue ?

2006 GT Premium: Vista Blue, Hurst, CDC shaker, boomtubes,chromed taillight, brake light, & quarter markers trim. JLT/SCT 93 C & M of Hubertus, WI dyno tune, JLT cold air routing to filter. Sequential Tails, Magnetic black out panel.

2004 Crown Victoria Police Interceptor: 70 mm TB, SCT tune, VX mufflers, J-Mod, 3.73 Eaton limited slip, moose tenderizer.

2003 Mercury Marauder: Kooks long tubes, K & N CAI.
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post #4 of 6 (permalink) Old 10-09-2010
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Quote:
Originally Posted by Patstang View Post
Thanks for the response. How about the exhaust issue ?
You're quite welcome. Sorry, I have no idea on the exhaust.
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post #5 of 6 (permalink) Old 10-09-2010
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You can definitely go straight to the 91 tune. As for the exhaust, I've been told nobody is tuning for axle-backs. There's not enough change from stock flow after the cats. They start tuning them for high flow cats, x-pipes, headers, etc.

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post #6 of 6 (permalink) Old 10-09-2010 Thread Starter
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I re-tuned for 91 and went and tanked it up. I got my "burble" back. Being that it has the extra weight of the fuel in it, I won't be able to judge how much "snort" I have now lost. I don't like the ethanol gas.

Different side note: I have been experiencing clutch noise ( throw-out bearing/pilot bearing ? ) noise intermittantly for months. Every time I take it to the dealer, it stops. Now, it is very frequent & as I am under a 7/70 warranty, they will be able to fix it. Question: should I opt for a new clutch right away ? I have 28K on it. Thanks again.

2006 GT Premium: Vista Blue, Hurst, CDC shaker, boomtubes,chromed taillight, brake light, & quarter markers trim. JLT/SCT 93 C & M of Hubertus, WI dyno tune, JLT cold air routing to filter. Sequential Tails, Magnetic black out panel.

2004 Crown Victoria Police Interceptor: 70 mm TB, SCT tune, VX mufflers, J-Mod, 3.73 Eaton limited slip, moose tenderizer.

2003 Mercury Marauder: Kooks long tubes, K & N CAI.
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