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Old 01-31-2012, 03:03 PM
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exhaust noise after tune

i put a s&b intake with a dpf/doc delete and a spartan with a 210 early lock tune. the cat back is stock with muffler and at the tail pipe it sounds like well,air rushing out of a 4 inch pipe, kinda like if there was avacuum running at the end of a 20 foot pipe? i'm writing it off as the stock twin tip with the holes in it.i have had similar with a truck with a clogged cat but way loader.

allso i'm assuming the early and late lock is reffering to the tranny? early for dd driving late for race?
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Old 01-31-2012, 03:07 PM
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it's the factory twin turbos
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Old 01-31-2012, 03:49 PM
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That my friend is the sound of AS Drunk on Diesel said ,Your factory twin turbos ,exhausting ahh!! i love that sound !!
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Old 01-31-2012, 04:56 PM
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Quote:
Originally Posted by raftdaddy View Post
allso i'm assuming the early and late lock is reffering to the tranny? early for dd driving late for race?
Early is actually better for racing. Most like it all the time though. Late lock is more for the guys who don't like early lock and those with larger tires.
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Old 01-31-2012, 08:17 PM
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thanx for the clarification on the sound,i'm chasing the grunt she makes on first start up.i am allready contimplating straight pipes,it is a sickness. between parts for the trucks and parts for my mustang i have a ups driver at my door more than me.
and allso a special thanks to the guys at spartan, keep up the great tech support!!
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Old 02-02-2012, 06:23 AM
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Originally Posted by 08stroker250 View Post
Early is actually better for racing. Most like it all the time though. Late lock is more for the guys who don't like early lock and those with larger tires.
why late lock for larger tires? and do you consider anything over stock size to be larger? thx
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Old 02-02-2012, 06:46 AM
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Im guessing early lock with larger tires (in my eyes 37"+) may bog the motor down?
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Old 02-02-2012, 09:48 AM
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Originally Posted by INJEKTER1 View Post
why late lock for larger tires? and do you consider anything over stock size to be larger? thx
not that i'm a diesel expert but my reasoning was the earlier the lock the less power you have,the later is higher in the rpm range,but when you have 1000 ft lbs of torque and such a low peak hp range does it even really matter??or would it be based on your turbos spooling quiker at the higher rpm??? that would give you more go off the line.
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Old 02-03-2012, 06:01 AM
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you answered my question with more questions My assumption would be that an earlier lock is better for your tranny if you are applying max power, so that your gears no longer slip and are firmly locked to Handel the power.....WOP throttle or pulling a heavy load without your TC lock up i think can pretty much chow your tranny....

Last edited by INJEKTER1; 02-03-2012 at 06:05 AM.
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Old 02-03-2012, 06:07 AM
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when you have taller tires, you have a greater RPM drop on shifts. The later shift point means you don't pull down to as low an RPM so you don't experience lugging, excessive smoke, higher EGT, etc.
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