SCMT question
#1
#3
SCMT question
Originally posted by ehagerty
is it ok to run the "Hi-PERF Tuning" program with out any other mods or guages if I am not towing
is it ok to run the "Hi-PERF Tuning" program with out any other mods or guages if I am not towing
Any chip is going to increase power by adding more fuel. Fuel + air = power. Without the fuel, you can't get more power. Added fuel also means added heat. Without gauges, are you willing to take the chance that your EGTs don't go too high? Sure, guys do it and get away with it, but how do you really know? Running unloaded will keep the EGTs lower than if you were hauling a load, but will they always be safe if you're dumping in extra fuel?
Spend your money on the gauges first. Even with an unmodified engine, an EGT gauge will help you to drive it more safely and more efficiently. After that, then do the exhaust and intake modifications. These will give you more power by reducing the pumping losses of the engine as well as keep the EGTs lower which will lead to increased efficiency. They won't give you the kick in the pants feel of a 60 -100 hp chip, but you KNOW they are safe.
Then, and only then, get the chip. Again, you're going to hear a lot of anecdotal evidence that what you are proposing is safe. But how many of these folks are going to help you foot the bill if you cook your engine and Ford finds evidence (like cleaned contacts where the chip plugs in) of a power enhancing modification that they did not approve? Your dime - your decision. Are you willing to be your own warranty station?
#4
#5
SCMT question
I have never had any problems with the programmers and Ford Warranty. Our Ford dealer even sells Hypertech programmers. What is considered a "safe" exhaust temperature? I removed my Hypertech, which was weak. I use the SCMT on perf tow, medium setting and it gives plenty of power. I used a remote(wireless) strap-on thermister sensor, on the exhaust pipe in various locations and even at full throttle no temp was ever over 900 degrees. (only was 78 to 83 outside). If you tow I am sure it would put your EGTs much higher and if it is hot outside even more. Using the SCMT on the high setting did make the EGTs go over 1000 degrees +. So I choose to run it on medium with no towing, it gives plenty of power on that setting. I do have the Ford Severe Duty intake 2U2Z-9K635-AA.
I keep hearing mixed comments on the exhaust. I measured my along my downpipe with a caliper and it is about 3.27" average. I have a 4" downpipe ready to install to connect to the rest of the 4" exhaust system. Does the downpipe have to be smaller than the rest of the exhaust system? Because of the turbo?
I keep hearing mixed comments on the exhaust. I measured my along my downpipe with a caliper and it is about 3.27" average. I have a 4" downpipe ready to install to connect to the rest of the 4" exhaust system. Does the downpipe have to be smaller than the rest of the exhaust system? Because of the turbo?
#6
SCMT question
Safe EGT would be less than 1300 farenheit pre turbo. Any hotter than that and you will start melting the turbo. Definately get a pyro and intake. The exhaust helps too but the way to keep EGT's low is to not overfuel. When you dump a lot of fuel you need to allow more air to keep from overfueling which pushes unburnt fuel into the exhaust where it burns creating a massive increase in EGT.
If you see black smoke (more than just a bit when first accelerating) then you're overfueling and probably have higher than normal EGT.
If you see black smoke (more than just a bit when first accelerating) then you're overfueling and probably have higher than normal EGT.
#7
SCMT question
Originally posted by RRMike
1300 farenheit pre turbo. Any hotter than that and you will start melting the turbo.
1300 farenheit pre turbo. Any hotter than that and you will start melting the turbo.
"It aint what you don't know that bothers me, it's what you know fer sher that just aint so." ~ Mark Twain
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#8
SCMT question
Originally posted by Carfunkel
Wrong, Wrong, Wrong!!! Your pistons are aluminum, your turbo is steel, probably a high grade stainless. Check out the melting point of these two metals. When your pistons are turning to soup, your turbo is just barely getting warmed up.
"It aint what you don't know that bothers me, it's what you know fer sher that just aint so." ~ Mark Twain
Wrong, Wrong, Wrong!!! Your pistons are aluminum, your turbo is steel, probably a high grade stainless. Check out the melting point of these two metals. When your pistons are turning to soup, your turbo is just barely getting warmed up.
"It aint what you don't know that bothers me, it's what you know fer sher that just aint so." ~ Mark Twain
I'm going by what they said in this article by Gale Banks. Aren't the pistons cooled from below with oil??
Last edited by RRMike; 09-08-2003 at 07:07 PM.
#10
Join Date: Jan 1997
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6 Posts
SCMT question
Originally posted by Carfunkel
Wrong, Wrong, Wrong!!!
Wrong, Wrong, Wrong!!!
You can keep the Powerstroke at 1250 all day long. 1275-1300+ for bursts (prolonged exposure of the turbo to 1275+ means it starts absorbing the heat and the tips start to glow and flatten out). This is fact of the Power Stroke, not an opinion.
#11
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