What to expect?

[TARZAN]

Well, I just picked up a 93 2WD 4.0 5-speed 2 door. I am currently in the process of replacing pretty much everything.....brakes, shocks, oil, filters, plugs/wires, PCV, o2 sensors, wheel bearings.....


Plans are some appearance mods that won't help performance at all lol.

I'm also going with a BBK TB, building a CAI, Pacesetter headers, full exhaust, e-fan, hypertech, posi unit, 3.73's, 255 pump, and a 75 shot.

I've built a couple different vehicles, and I don't expect amazing things...I'm doing this b/c I wanted something different and fun. I don't have much $$$ tied up in it, so I'm gonna have fun.

thoughts? Anything else I should do? Any intake manifold modifcations, etc...? I'm not all that interested in going into the engine. I'll upgrade the clutch when this one lets go.

Thanks,

-Will

 

[Anime]

Replacing the fuel filter is a good idea.

I'd suggest skipping the pacesetter headers and just getting the JBA's.

All of the cheap headers have seal and fitment issues that eventually make them cost more in the long run to resolve or junk and replace anyway. They also increase underhood temps as most aren't ceramic coated. You might get away with it and get a good set that works fine, but I wouldn't put pacesetter anything on something I own.

You will probably want to go with a comp cam (likely the 422) if you want higher RPM performance to go with your mods.

The other big increases come from working the restrictive heads, either cleaning/porting the stock 93TM's, replacing them with ported/polished aftermarket 93TMs, or even replacing them with later 95TM heads for increased compression.

The weak spot on these is the clutch slave cylinder. When it starts giving you shifting trouble, drop the tranny, replace the slave with a Motorcraft one from the dealer, and throw on a Centerforce clutch.

 

[TARZAN]

Replacing the fuel filter is a good idea.

I'd suggest skipping the pacesetter headers and just getting the JBA's.

All of the cheap headers have seal and fitment issues that eventually make them cost more in the long run to resolve or junk and replace anyway. They also increase underhood temps as most aren't ceramic coated. You might get away with it and get a good set that works fine, but I wouldn't put pacesetter anything on something I own.

You will probably want to go with a comp cam (likely the 422) if you want higher RPM performance to go with your mods.

The other big increases come from working the restrictive heads, either cleaning/porting the stock 93TM's, replacing them with ported/polished aftermarket 93TMs, or even replacing them with later 95TM heads for increased compression.

The weak spot on these is the clutch slave cylinder. When it starts giving you shifting trouble, drop the tranny, replace the slave with a Motorcraft one from the dealer, and throw on a Centerforce clutch.

I lived in Hattiesburg for 6 years lol...

Currently replacing the filter, fule included

I've had Pacesetters on vehicles in the past with no problems. I'll wait and see what others have to say, but I don't have $1500 in the vehicle to date.....I'm not gonna bother with headers if I have to pay for JBA's.


Thanks for the slave cylinder information, I'll definitely look into that.

I'm not interested in going into the motor, I.E. heads/cam....thanks though.

I'm gonna wait and see what other responses I get. If they all look like this I may just scrap toying with it all together.

-Will

 

[Anime]

You don't HAVE to spend the dough on heads/cam mods, but that's the route to max performance with the 4.0L, at least in the traditional way of broadening the powerband and moving up the torque/horsepower curve.

If you don't move up the torque, there's no need for mods like headers, a larger TB, higher flow fuel pump, etc. etc. Even on high HP 4.0L rides, headers have show minimal gains. Without working the heads, theres not enough difference.

You can get decent gains with a CAI (just popping on a KKM or K&N cone filter works great) and catback exhaust (dynomax super turbo for a sleeper, flowmaster 50 SUV if you like the flowmaster sound). Replacing the stock cats with a single 3-way (or popping on the stock replacement from Carsound) is also an option.

Toying with it for some performance is fine, just don't mix and match high-RPM performance mods with ones that are better for low-RPM torque. The 5-speeds usually come with a cam that puts the torque curve down low with a max torque around ~2500 RPM (depending on gearing). The CAI, exhaust, and 3.73 gears with stock size tires should make quite an improvement. You could also look into other maintenance mods (MAS cleaning, synthetic ATF/gear oil, magencor wires, etc.) that make the most of what's available.

 

[Spdrcer34]

Headers are useless on a 4.0L OHV Street Explorer. Period.

Ryan

 

[rileyrs]

a good tune up, an intake and cat back will add a bit.
intake and cat back are the two easiest cheapest mods for some noticable power without touching the motor or drivetrian obviously.
if you do these then youll have a good idea of whether you wanna continue modin this car or not

 

[TARZAN]

I think I already have my answer. Thanks for the info guys, much appreciated.

-Will