Ok I went ahead and bit the bullet and bought an exhaust for my 93 F-150 5.0 (302). I got:

A Flo-Pro performance muffler, it has one inlet and two outlets. I kept my factory catalytic convertor on. So I ran one piece of pipe from the catalytic convertor into the new muffler and then two pieces of pipe out of the muffler and put some nice chrome tips on. I used 2.25" tube all the way around.

The truck is not really loud it just has a much deeper tone to the exahaust not to mention how much better it looks then the old stock exhaust. I am really happy with it. But it seems that it didn't make any difference at all in my horsepower.

The truck is stock except for a K&N drop-in and a Superchip.

1: So should I have gained some power from this? If so around how much HP?

2: Did I loose any torque with this setup over the stock system?


Thanks!


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1993 Ford F-150
Kustom Kreations Package
2WD, 5.0 (302), AOD, 3.55

K&N Drop In, Superchip & Pirelli Scorpion Zeros!

Eclipse CD Player, Eclipse 8-CD Changer, Eclipse Amp, Clarion front speakers, 8" Boston Acoustics Subwoofer

 

OH YES! you surely did! I am not sure if a muffler setup like yours would be much different than mine, but in any case you'll notice a difference. Just give it time.

I really don't know about hp ratings though. I know that you can gain 4-7 hp by removing the cat.

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Toydestroyer1@yahoo.com

1993 F-150 302/e4od/355 Limited slip. dual exhuast w/o mufflers,2 1/4" pipes with Echo Tips, headers, accel plugs/wires(8.6mm)/rotor/cap, hypertech powermodule, 4 degree advance,5% dark tint. Alpine cd player and Pioneer speakers.

NEWLY ADDED:Blaster Coil,MSd 6A Ignition, TPS Mod,hopefully roller rockers in the future!!

1989 F-150 XLT 4x4 302/aod true duals with turbo mufflers, 30X9.50" wild country tires, 3:55 gears

 

Well after a little "informal" testing. I do believe I have gained some power. I know this is not a good way of testing power gains but before the exhaust in a level surface the truck would barley "squeal" the right rear tire now it will squeal for every bit of two seconds. Also when doing 65mph on the interstate and I kick it down to pass someone it seems to pick up speed a lot quicker and it wants to keep on going.

I figure that after my Superchip, K&N and Exhaust I've probably gained about 28hp at the flywheel. So maybe about 20 RWHP. That seems pretty good.

Now I need to figure out what to do next. I hate to remove the catalytic convertor because if i ever sell the truck it will be a lot harder to sell. We don't have emissions or anything here but, like everywhere else we are supposed to leave the catalytic convertor on. I wonder if a cop got down and checked to see if I had one, if I would get in trouble or not?

Hmmmmmm, I could also do headers but they are a lot of $$$$ and a lot of time. Plus a lot of hassle tightning up the bolts every 25k miles and putting in new gaskets. I just don't know what to do next.

 

BMW: I would honestly think you gained more than 28 hp with your mods. Jeez I know I gained more. This summer, I plan on removing some of the innerds of my cat. (YA, I know its illegal.) or running true duals with 2 convertors. I really love my headers, I have only tightened once in almost a year, and they were worth the money. I have cracked manifolds on my old truck, so I'm planning for another set.

I finally got the ignition on, or should I say had it put on, and I have noticed slight more throttle responce, will tell more n time.

Other VERY cheap upgrades, you may think about is, a TPS mod, and advancing your timing. It is a noticeable difference, and its free, providing the right tools.

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Toydestroyer1@yahoo.com

1993 F-150 302/e4od/355 Limited slip. dual exhuast w/o mufflers,2 1/4" pipes with Echo Tips, headers, accel plugs/wires(8.6mm)/rotor/cap, hypertech powermodule, 4 degree advance,5% dark tint. Alpine cd player and Pioneer speakers.

NEWLY ADDED:Blaster Coil,MSd 6A Ignition, TPS Mod,hopefully roller rockers in the future!!

1989 F-150 XLT 4x4 302/aod true duals with turbo mufflers, 30X9.50" wild country tires, 3:55 gears

 

TPS mod? Thats throttle position sensor. Correct? Never heard of modifying that for free how do I do it?

 

correct, Tps is the Throttle Position Sensor, it is located underneath the Throttle housing, it has several wires.
Check this out, you'll need a voltmeter, and I would have someone who is familiar with engines. I have a friend who is a retired Ford mechanic, so he gives me all the details. And there are some performance engine builders among us, who can give details, like side gapping and etc.
https://www.f150online.com/f150board...ML/000781.html

Advancing the timing. I still don't know if a chip does anything to the timing, but I advanced mine 4 degrees, the computer brings it to about 17. Everyone knows how to do this, and its very simple to do on older v-8's like ours.