How safe is the street tune (SCT)on my 05??? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 19 (permalink) Old 07-29-2009, 05:30 PM Thread Starter
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How safe is the street tune (SCT)on my 05???

Just got my truck lifted (10" on 40's) and installed my sct....Wow it feels like a race truck even being that big compared to when it was stock and not lifted. I absolutley love it but I have not installed exhaust and was wondering how high those EGT's are getting. I do not tow but just wanted to know how much power am I adding with the street tune and if it is that safe???
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post #2 of 19 (permalink) Old 07-29-2009, 05:44 PM
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are you refering to the canned street, or custom street tunes?either one if drove normally will be ok,but if you like to get on it alot and stay on it ,I would recommend an exhaust and gauges,and start saving up for head studs. Do some searches on this site to find out what is recommended for these trucks. WELCOME TO TDG!!

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post #3 of 19 (permalink) Old 07-29-2009, 05:50 PM Thread Starter
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I was refering to the canned Street tune or the one pre loaded. I dont plan on having a race truck just wanted to pump it up a little. I do plan on getting the 4" MBRP no cat soon just wanted to make sure I was okay for now. Thanks for your help..

Next Mods....ARP Studs and EGR delete

2005 F250 CC SB
SCT Tuned
10" Pro Comp Lift on 40's

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post #4 of 19 (permalink) Old 07-29-2009, 06:01 PM
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as long as you don't stay on it for to long you should be ok,IMO I would start with sct,exhaust,and gauges,exhaust will help it to breath better,and gauges to monitor engine to help find possible issuse that might happen. hopefully other members will chime in with thier opinions.

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post #5 of 19 (permalink) Old 07-29-2009, 06:54 PM
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I would also recommend a fuel pressure gauge. This is because my buddy has an '05 and with the same canned street tune, fuel pressure would drop from 48psi to almost 35psi on a hard run at WOT and under 45psi of fuel pressure isn't good. So i ended up shimming the factory fuel pressure regulator with the bb and that raised it to 58psi. But now his truck has a FASS stand alone system at 60psi and fuel pressure never drops below 55psi when at WOT.

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post #6 of 19 (permalink) Old 08-20-2009, 06:36 AM
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If you have stock 3.73 gears still, go lower before you spend money on exhaust, otherwise you'll be spending the money on a new tranny. With 40s I'd go with at least 4.56s, preferably 4.88s.

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post #7 of 19 (permalink) Old 08-20-2009, 02:05 PM
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Get your exhaust(turbo back) and egt probe installed asap. High gearing and power tuned=high egt's. Make sure the cat is deleted with your exhaust system, or your egt drop will be not much better than a stock exhaust. Harry

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post #8 of 19 (permalink) Old 08-20-2009, 08:16 PM
 
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I would run it stock and not worry about egt's. I have been told by multiple sources that as long as you dont tow with a hot tune, then there is not a need for an exhaust and gauges. You also need to drive the truck like an adult. From my research, it apears as though an exhaust does not drop egt's all that much. my .02
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post #9 of 19 (permalink) Old 08-20-2009, 08:59 PM
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Quote:
Originally Posted by ncmallard78 View Post
I would run it stock and not worry about egt's. I have been told by multiple sources that as long as you dont tow with a hot tune, then there is not a need for an exhaust and gauges. You also need to drive the truck like an adult. From my research, it apears as though an exhaust does not drop egt's all that much. my .02
Big tires with stock gears puts a similar load on the powertrain as towing does. The engine and transmission see more torque at lower speeds.

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post #10 of 19 (permalink) Old 08-20-2009, 09:03 PM
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Quote:
Originally Posted by ncmallard78 View Post
From my research, it apears as though an exhaust does not drop egt's all that much. my .02
Not sure what you call "all that much" but mine are down roughly 200 compared to the stock exhaust system.

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