Explorer Sport Trac

[doc]

Ive seen (and heard) of a Sport Trac running on MTs.  Has anyone done any other mods ? Are there lift kits and other suspention upgrades available locally?

[johnqpublic318]

Doc,

Mojo who was with us during our Aurora adventure runs 265/75R16 (32") Dunlop MT2s.  Other mods on that particular Sportrac includes a Superchip (which removed the top-speed limiter), Bilstein shocks, and now, two roof mounted Explorer ProComp 6" 130watt lights on a custom light-bar that Mojo himself made.

Superlift makes a 4-inch lift for the Sportrac that costs roughly $1,500 (in the U.S.)  I'm sure it can be made available to you locally as long as you're willing to pay for it.  I'm sure other kits will come out for it but I doubt if they'll be much cheaper.

[the driver]

 The new sport trac, 2003 model has better gas mileage, would you believe the V6 at around 7 kms per liter.  And the best is the power of the engine... superb and good handling and ride.

 If i would be given a chance... it would be my next 4 x 4

[doc]

thanks guys. i dont really own one,  my father just leaves his truck with me when he is out of the country. its a guzzler by my standards but  yes power is there when needed.  
the bilsteins sound interesting. im wondering if it will stiffen up the ride.
i was thinking of removing the stepboards and see how it goes at jungle base one of these days....    

[the driver]

 I've seen one in our baler trip.... the bilteins shocks were better than stocks according to Mojo if i'm not mistaken.  It will leave other behind considering it is an automatic....also the river crossing capability is very good..... the step boards will act as protection of the underside.... better to damaged that than the body. In tanay, the stepboard saves my pajero from dent.

[Est]

how much yung bilsteins shocks? san makakabili?

[rookie]

Doc,

That superchip JohnQ was referring to looks mighty tempting!

Mojo's ride simply wooshed pass our rides in Baler!

[johnqpublic318]

Aside from what I mentioned above, MOJO's Sport Trac also sports a Gibson cat-back exhaust.

What's next?  Maybe a cat-forward system and a supercharger.  Power is addictive...

[the driver]

Aside from what I mentioned above, MOJO's Sport Trac also sports a Gibson cat-back exhaust.

What's next?  Maybe a cat-forward system and a supercharger.  Power is addictive...

 Is performance catalyctic conv available here ?  I'm tempted to remove the cat. conv. of my jeep and upgrade the exhaust.  

 JohnQ,

 I observed the tube diameter from the exhaust manifold to (before) catalyctic conv. is bigger than after the cat. conv up  to the muffler and tail pipe! If I will install same (after the exhaust manifold) diameter tube and muffler without the cat. conv I believe will gain considerable power.

 Any comment Sir JohnQ ??

[johnqpublic318]

 Is performance catalyctic conv available here ?  I'm tempted to remove the cat. conv. of my jeep and upgrade the exhaust.  

 JohnQ,

 I observed the tube diameter from the exhaust manifold to (before) catalyctic conv. is bigger than after the cat. conv up  to the muffler and tail pipe! If I will install same (after the exhaust manifold) diameter tube and muffler without the cat. conv I believe will gain considerable power.

 Any comment Sir JohnQ ??

Random Technologies makes performance converters but not sold in the Philippines.  Nodalos probably has large diameter cats.   However, unless you're doubling your hp levels, removing the cat will result in almost negligible power gain.  Modern cats are almost like straight-thru mufflers and they are restrictive because of their hole diameter and not because they are cats.

If your 1999 Cherokee is U.S. spec and OBD-II compliant, DO NOT remove the cat converter.  With OBD-II, there is an oxygen (O2) sensor before and after the cat.  If you remove the cat in-between, the after cat sensor will read high-emission levels and the computer will think that the cat has failed and turn-on a "check engine" light.  This will be annoying and you may experience a decrease in performance.

O2 sensors not only provide feedback for A/F mix adjustment but also keep the cat healthy and read if the cat fails.  For this reason, I really don't believe in adding a Nodalos after-market cat on vehicles without O2 feedback.  

If your engine is often out of tune, it will destroy the cat.  With an O2, the engine tunes itself up to some extent.  Without an O2 sensor, how will you know if you cat is failing, clogging, or your engine is running on conditions that will make your cat fail?

On your Cherokee, leave the cat alone until it fails.  When it does, install a larger diameter one.  

To gain more power, run a larger diameter exhaust after the cat and a free-flowing or straight-thru muffler.  Personally, I'd just dump the muffler and just run 2.5" pipes after the cat.  It will be louder but your stock manifold and cat should provide adequate sound deadening.

[the driver]

 Is performance catalyctic conv available here ?  I'm tempted to remove the cat. conv. of my jeep and upgrade the exhaust.  

 JohnQ,

 I observed the tube diameter from the exhaust manifold to (before) catalyctic conv. is bigger than after the cat. conv up  to the muffler and tail pipe! If I will install same (after the exhaust manifold) diameter tube and muffler without the cat. conv I believe will gain considerable power.

 Any comment Sir JohnQ ??

Random Technologies makes performance converters but not sold in the Philippines.  Nodalos probably has large diameter cats.   However, unless you're doubling your hp levels, removing the cat will result in almost negligible power gain.  Modern cats are almost like straight-thru mufflers and they are restrictive because of their hole diameter and not because they are cats.

If your 1999 Cherokee is U.S. spec and OBD-II compliant, DO NOT remove the cat converter.  With OBD-II, there is an oxygen (O2) sensor before and after the cat.  If you remove the cat in-between, the after cat sensor will read high-emission levels and the computer will think that the cat has failed and turn-on a "check engine" light.  This will be annoying and you may experience a decrease in performance.

O2 sensors not only provide feedback for A/F mix adjustment but also keep the cat healthy and read if the cat fails.  For this reason, I really don't believe in adding a Nodalos after-market cat on vehicles without O2 feedback.  

If your engine is often out of tune, it will destroy the cat.  With an O2, the engine tunes itself up to some extent.  Without an O2 sensor, how will you know if you cat is failing, clogging, or your engine is running on conditions that will make your cat fail?

On your Cherokee, leave the cat alone until it fails.  When it does, install a larger diameter one.  

To gain more power, run a larger diameter exhaust after the cat and a free-flowing or straight-thru muffler.  Personally, I'd just dump the muffler and just run 2.5" pipes after the cat.  It will be louder but your stock manifold and cat should provide adequate sound deadening.

   Yes I remember it has an On board sort of computer system ( OBD ).

  OK ! I will install a straight flow muffler with 2.5" pipes after the cat.

  Thank you very much !!!!  Tomorrow its done.

[johnqpublic318]

Just make sure not to damage the after-cat O2.  It's replaceable but can cost over P2,000.

[the driver]

Just make sure not to damage the after-cat O2.  It's replaceable but can cost over P2,000.

 What this thing (O2) look like ? I've been to the shop and ordered the muffler, tomorrow it will be installed. Anyway will look and find it when the jeep lifted.

[MOJO]

hey Doc,

MOJO here.... regarding the MT2s on my sport trac, the muddy uphill trail when I was in Baler was completed on my first try (with some slippage of course). I consider my off roading skills to be minimal and the right tires got the job done.
Although street going tires have more traction on the streets .... the traction MTs provide off road more than makes up for it.

[MOJO]

by the way,  about the bilsteins.....  You wont notice that much difference on the streets as far as comfort is concerned. But on the rough roads going to Baler ...... wait a minute .... what rough roads ??