4.0 Firepower Kit

postalxj · Aug 22, 2008

What do you guys think of this kit? and does any one run this setup?
If so how does it do? and what kind of plugs are you running?
I have a 96 with a 4.0 HO

Thank you

http://www.performancedistributors.com/jeep.htm
Sorry if this is a repost but i could not find one on it but i also have not looked to much.

I have been very busy at work!!

Muad'Dib · Aug 22, 2008

The stock ignition is good for something like 350 HP, there is really no need to go beyond the OEM coil.

However, plug wires are a good thing to upgrade. I would recommend magnecor ($$), but that is of course my opinion.

That and making sure you get brass terminals / inserts for your cap and rotor, and a decent set of plugs (i recommend champion truck plugs) and your all set.

squirrel80 · Aug 22, 2008

MSD is the way to go. I will be putting a coil, wires and CDI box on my jeep once I finish the rest of the drivetrain.

XBoBJ · Aug 22, 2008

squirrel80 said:
MSD is the way to go. I will be putting a coil, wires and CDI box on my jeep once I finish the rest of the drivetrain.

Why MSD?

KMK172008 · Aug 22, 2008

MSD is the name in old chevy small blocks. Never used em on jeeps though

squirrel80 · Aug 22, 2008

MSD is what I have used on all my performance vehicles over the years and in race cars that I have worked on. I my opinion it seems to make a car start much easier, run smoother and a little more power. Now I can't go in to dyno numbers to prove it, but I think that they are real well made products but a little pricey.

Muad'Dib · Aug 22, 2008

Its true MSD is usually good for MOST applications. My opinion is that the I6 Jeep is not one of them. The coil is pretty damn good from the factory.

wolfpackjeeper · Aug 22, 2008

MSD = May Suddenly DIE

the box runs great for most people but I have heard quite a few stories and seen a few randomly fail only to check out ok later, when the owner switched to a backup stock ignition instead of the box it ran fine. The coils and wire sets are very good. But I still regard the ignition box as a race or Offroad only type of thing. And I would pick up a spare incase it fails.

ECKSJAY · Aug 23, 2008

Muad'Dib said:
Its true MSD is usually good for MOST applications. My opinion is that the I6 Jeep is not one of them. The coil is pretty damn good from the factory.

Yup. Can't figure out why everyone is hot over paying hundreds of bucks for something that came from the factory. How often do you hear of a factory coil going bad?

wolfpackjeeper · Aug 23, 2008

ECKSJAY said:
Yup. Can't figure out why everyone is hot over paying hundreds of bucks for something that came from the factory. How often do you hear of a factory coil going bad?

I had to replace mine, but it was from 1991. It was just not giving quite enough, considering that the stroker runs a higher compression it should not have mattered, but it was a little too dead for that

ECKSJAY · Aug 23, 2008

wolfpackjeeper said:
I had to replace mine, but it was from 1991. It was just not giving quite enough, considering that the stroker runs a higher compression it should not have mattered, but it was a little too dead for that

But that's just the point... Everything will wear out eventually, so just replace with OE and get another 250k out of it.

wolfpackjeeper · Aug 23, 2008

thats what I did. Works like a charm now

ECKSJAY · Aug 23, 2008

wolfpackjeeper said:
thats what I did. Works like a charm now

Nice! I had tried different wires and was looking into cap and rotor options when my VERY experienced Jeep mechanic buddy brought that up. I spent less for Mopar everything (wires, cap, rotor) than just the aftermarket wires would have cost...and it worked the best. Only thing I had changed were the plugs. I put the Champion truck plugs in and they lasted longest and seemed to hold up the best.

-96JeepSpeed- · Aug 23, 2008

IMO, Theres is absolutly no reason to replace the OEM ignition on the 4.0, with somthing else. Just like throtle body spacers, I dont belive in them. Just my 2 cents.

Ray H · Aug 23, 2008

Ive got the Firepower kit in my 96 XJ and my wifes 99TJ, both with 4.0.
It works fine but probably no better than if you bought new OEM or other high quality pieces. It advertises that you can open the gap.its true, I cant remember what I set the gap at but it was right at what they recommend. I saw some performance gain (smoother idle, quicker response) but that was probably due to simply having new ignition parts.
Bottom line, The Firepower kit works fine but its not really worth the money when you can purchase good uality parts that will do the same thing for less money.

-96JeepSpeed- · Aug 23, 2008

I also dont think an average Joe could tell the difference.

fscrig75 · Aug 23, 2008

I have the performance kit, don't waste your money. The wires are good but everything else really isn't worth it, IMO.

postalxj · Aug 23, 2008

Thank all of you it will save me money for GAS lol
That helps me out alot!!!!!!!!!!!

4.0 Firepower Kit

postalxj

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Muad'Dib

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squirrel80

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XBoBJ

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KMK172008

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squirrel80

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Muad'Dib

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wolfpackjeeper

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ECKSJAY

Water is dirty

wolfpackjeeper

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ECKSJAY

Water is dirty

wolfpackjeeper

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ECKSJAY

Water is dirty

-96JeepSpeed-

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Ray H

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-96JeepSpeed-

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fscrig75

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postalxj

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