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SVT Shelby GT500
SCJ MONO HELP
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<blockquote data-quote="Jam421" data-source="post: 16031725" data-attributes="member: 110985"><p>John at Accufab is a terrific guy. He called my home twice. But sadly they could never resolve my SCJ issues. Noting ..as yours...my issues would hit wrench light as soon as temps rose John even baked my SCJ at 260 degrees for 30 minutes in an oven! Of course...subsequent bench testing still showed it to be 100%...at Accufab ....except for the Tip In Wrench Lights that on me appeared again & again.</p><p></p><p>Regarding box tunes in 2014 I had the VMP Stage 4 Twin 67/CAI/Pulley. It pulled 648rw. No data logs. A shop quickly got that to 665rwhp. In 2017 the Lund Base tune for my KB168/XBA was data logged. That's when I learned the Base Tune was Fat and was very conservative on Timing. As we data logged fuel was leaned out and I felt that but despite also feeling very strong top end gains the mid range seemed a bit flat. Lund being remote ...asked me to sign a waiver. Custom dynos where I live also are not responsible for dyno failures. From a basic amateur level I wanted AFR where other Custom Tunes had those parameters. Lund obliged and also added timing later suggesting my local Sunoco fuel was not up to par. Having a full tank I added VP Octanium at Lund's suggestion and BOOM.....big power felt on butt dyno...Big flat torque curve..ALL the timing in on data log. I had the AFR/Timing checked at the custom tune Mustang Race shop who told me they would've had the same parameters. Since then I switched to BP fuel as well. Custom Tunes are the best IMO. We have 2 Mustang Dyno Shops here. But when I followed Lund's advice with the KB168+huge JLT148 even they cringed..... So I went the Lund Data Log route. When it did 2 Tune Evaluation pulls they told me the AFR/timing were perfect and it was all kudos. How did Lund tweak the KB168 voltages for idle/off idle driveability/throttle response etc....remains proprietary to Jon Lund.</p></blockquote><p></p>
[QUOTE="Jam421, post: 16031725, member: 110985"] John at Accufab is a terrific guy. He called my home twice. But sadly they could never resolve my SCJ issues. Noting ..as yours...my issues would hit wrench light as soon as temps rose John even baked my SCJ at 260 degrees for 30 minutes in an oven! Of course...subsequent bench testing still showed it to be 100%...at Accufab ....except for the Tip In Wrench Lights that on me appeared again & again. Regarding box tunes in 2014 I had the VMP Stage 4 Twin 67/CAI/Pulley. It pulled 648rw. No data logs. A shop quickly got that to 665rwhp. In 2017 the Lund Base tune for my KB168/XBA was data logged. That's when I learned the Base Tune was Fat and was very conservative on Timing. As we data logged fuel was leaned out and I felt that but despite also feeling very strong top end gains the mid range seemed a bit flat. Lund being remote ...asked me to sign a waiver. Custom dynos where I live also are not responsible for dyno failures. From a basic amateur level I wanted AFR where other Custom Tunes had those parameters. Lund obliged and also added timing later suggesting my local Sunoco fuel was not up to par. Having a full tank I added VP Octanium at Lund's suggestion and BOOM.....big power felt on butt dyno...Big flat torque curve..ALL the timing in on data log. I had the AFR/Timing checked at the custom tune Mustang Race shop who told me they would've had the same parameters. Since then I switched to BP fuel as well. Custom Tunes are the best IMO. We have 2 Mustang Dyno Shops here. But when I followed Lund's advice with the KB168+huge JLT148 even they cringed..... So I went the Lund Data Log route. When it did 2 Tune Evaluation pulls they told me the AFR/timing were perfect and it was all kudos. How did Lund tweak the KB168 voltages for idle/off idle driveability/throttle response etc....remains proprietary to Jon Lund. [/QUOTE]
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