Shouldn't I have gained more?
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New User
Joined: Oct 2004
Posts: 23
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Shouldn't I have gained more?
I've installed a single in/dual out exhaust system, an AEM Brute Force intake, and loaded the Diablosport performance tune from my Predator (with a full tank of 93 octane) on my '99 F-150 5.4L.
Me and my buddy took it out and ran some 0-60 and quarter mile times, and I saw almost no gains from 0-60. I also think I have a crappy quarter mile time.
0-60-------1/4mi (both with above mentioned upgrades)
10.69s-----18.92s
10.59s-----18.85s
10.37s-----(got mad and went home)
10.75s
These numbers could be a little off. My buddy had a stopwatch on his cellphone. Are these good times, or did I just waste $800? If I did waste money, where did I go wrong?
Me and my buddy took it out and ran some 0-60 and quarter mile times, and I saw almost no gains from 0-60. I also think I have a crappy quarter mile time.
0-60-------1/4mi (both with above mentioned upgrades)
10.69s-----18.92s
10.59s-----18.85s
10.37s-----(got mad and went home)
10.75s
These numbers could be a little off. My buddy had a stopwatch on his cellphone. Are these good times, or did I just waste $800? If I did waste money, where did I go wrong?
Senior User
Joined: Feb 2003
Posts: 206
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From: Long Island, NY
I'm assuming you reset the computer? I would think that you should see better performance with your mods than what you are getting. If not, try resetting the computer, it could make a difference.
Senior User
Joined: Feb 2003
Posts: 206
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From: Long Island, NY
You reset the computer by taking off the negative battery cable off the battery and let the truck sit for 15 to 30 minutes. This resets the computer to default settings. After putting back on the negative cable, start driving it around. The computer will adjust itself over time to the new settings (your new mods/configuration). It should then make the adjustments to your new chip and exhaust.
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New User
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Do I reset the computer when the performance tune is installed, or load the program after the computer is reset?
Also, I've been told that headers are only worth it for heavy off-road use. I just want to go really freakin' fast.
Also, I've been told that headers are only worth it for heavy off-road use. I just want to go really freakin' fast.
Moderator
Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
If you really want to go fast, you need either a Lightning or a Cobra Mustang!!!! These are heavy trucks with small cubic inches so N.O.S., a supercharger or a lighter vehicle is what you need.
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Senior User
Joined: Jun 2004
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Have you considered getting an electronic timer/dyno? There are several on the market. I like the G-Tech Pro, which I think is around $300. I know that sounds like a lot, but believe me, it will let you know whether your mods are actually doing anything. It's not quite as accurate as going to the drag strip or using a chassis dyno, but it is pretty darned close in my opinion. It'll show you horsepower at the rear wheels, torque, and show performance curves for both throughout the rpm band, it shows 0-60, 60ft, 1/8, 1/4 mile and other times, store the data, let you download it to a laptop, etc. Very useful.
If you really want to see what your mods do (or if they are snake oil) one of these gizmos is a good investment before you spend a lot of dough.
If you really want to see what your mods do (or if they are snake oil) one of these gizmos is a good investment before you spend a lot of dough.
Posting Guru
Joined: Jan 2004
Posts: 1,437
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From: Hamilton, ohio
Originally Posted by Johnny454
What would you suggest I do Deckedout?
my 2002 ex cab 4.6L has duel exhaust with no muffler, AEM breut force intake and the diablo predator tuner. i have not go to run the truck since adding these things but i plan on doing so maybe this spring.
Fleet Mechanic
Joined: Sep 2002
Posts: 1,769
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From: Gretna ,LA.
Reaction times have no effect on 1/4 mile et's since the timer does not start till you trip the beams at the starting line.That is why a quicker et sometimes loses.It effects who gets there first,but not the time.