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Old 04-14-2011, 08:38 PM
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Early 99 7.3 mods

I just bought a early 99 f-350 with the 7.3 powerstroke this is my first diesel so I don't know much about them. I was just wondering if I chip it do I need to put an intake or exaust on it to keep egt down? What would be the best mod I cold do for the least amount of money and and see the best results?
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Old 04-14-2011, 08:49 PM
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Hey, welcome to the org

Yes, you need an intake and to at least remove your cat (if its still there) and muffler to run a chip. I would suggest going up to a 4" exhaust, but if money is tight, save the money for good tunes and just straight pipe what you've got.

As far as the intake, there are a lot of good expensive ones out there. Again, if money is an issue, you can easily do the diy 6637 intake, a lot of guys have and are happy with it.

I would also suggest getting guages before tuning, egt is a must as well as tranny temp if youve got an auto tranny. Boost is fun too. Don't skimp on guages, get good ones or be disappointed. Use some of the money you saved from the intake and exhaust diy work on good guages.

Once you get the intake, guages, and exhaust taken care of, then you can start looking at tunes. Only go with custom tunes, or not get the full potential of the truck and toast your tranny. PHP (Power hungry performance) is who I went with, but there are a couple other guys out there that do custom tunes. I've been extremely happy with my PHP tunes and they are great people to work with.

If you have any other questions, don't hesitate to ask.
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Old 04-14-2011, 08:56 PM
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What does removing the cat do? Does it just make it flow more.
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Old 04-14-2011, 08:59 PM
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Quote:
Originally Posted by adavis11 View Post
What does removing the cat do? Does it just make it flow more.
Exactly. I removed mine along with the muffler when I jumped up to my 4" system and noticed HUGE power and mpg gains.

You won't be able to run tunes with a cat, your egts will be through the roof. Our trucks aren't catalyst vehicles (meaning their is no sticker under the hood that says its supposed to have one like cars and newer trucks do) so pull it off

Where do you live? do you have emissions testings? If not, it won't be an issue either way.

Last edited by e99f2506sp; 04-15-2011 at 08:39 PM.
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Old 04-15-2011, 03:47 PM
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Would putting a turbo back exaust system in do the trick.
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Old 04-15-2011, 04:31 PM
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Yeah, that'd do it. Thats what I did. I was just saying if your doing it on the cheap, cutting the cat and muffler out is a decent alternative until you get big power.
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Old 04-15-2011, 04:45 PM
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^^^^ This mans givin ya all the right info
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Old 04-15-2011, 07:49 PM
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what turbo back exaust would you recomend
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Old 04-15-2011, 08:42 PM
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I went with mbrp, but there are a lot of decent brands out there. If you live somewhere with salt avoid all "aluminized steel" ones and only go with the stainless steel. If salt isn't in the picture, save yourself and go with the aluminized one. A couple winters will eat through the aluminized steel exhausts...
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Old 04-15-2011, 09:00 PM
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I would have to agree with the advice givin! DO YOURSELF THE FAVOR AND GET GAUGES!!! I have the tinted glow shift gauges (Oil pressure,EGT,and Boost) they aren't cheap but look great! No since in cookin a turbo or tranny if auto. MBRP makes the 4" turbo back exhaust for around $350 all aluminum. As for the tunes, TS Performance makes some decent 6 position chips, for a reasonable price.

Last edited by $howtime; 04-15-2011 at 09:09 PM.
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