Someone posted this somewhere else, I think yahoo or something. If there are some truth stretches or straight lies please let me know before I do some of these to my Foxbody.
you can make it sound more powerful buy getting a new muffler like a flowmaster one. that will come to a total of about 100 dollars. or cut off the old muffler and buy a pipe form the hardware store and extend it to the back. that will also make it go faster to. here is a long list of how to get alot of power for little...
within a weekend and no more than75 bucks tops you can get an easy 20 horsepower atleast.
first go to ebay and buy a cheap cold air kit for 40 dollars. then install it and go to the store and buy some plumbers pipe and set up a nice ram air design to right under the filter. you can easily get 15 hp from this and a much greater sounding car.
then take your plugs out and mark the open end on the plug and put them in and index them so that the black line you marked in facing the intake side of cylinders
while your at the store buy some refrigerant duct or some insulater and insulate all the fuel lines in the car to help cool down the car.
also buy a coupler at the store. or dig one out of the garage and locate your throttle body then diconnect the to lines of coolant flow and connect them to the coupling. put TIGHT clamps on. this will help cool down the throttle body ALOT and create colder air which means more power. this is proven to get back 10 ftpnds of torque of a hot engine and good for .2 in the quarter mile
next do a oil change and use synthetic oil in your car. not only will it run your car run longer but its good for about a horse or two
now go to pep boys and buy some nice ngk platinum plugs. NOT IRIDIUM! iriduim tend to break off into the piston and mess your motor up horribly. and get a nice pair of spark plug wires from ebay or somewhere. this is good for about 3hp
now you can get a little hacksaw and cut off that old rusty muffler of yours that is cloged with rust and get a connector pipe and clamp it on from the store. this is good for freeing up the backpressure and about 1 or 2 hp.
now for the fun one. adjust your tps! (throttle position sensor)
you can adjust the TPS to the ideal setting buy slightly rotating it either clockwise or counterclockwise. the sensor itself is held on by 2 bolts. you must "slot" the bolt holes in the sensor so that it can be rotated. what you should shoot for is a reading of .95-.97 volts. .96v is ideal, and thats what ive got mine set on right now. it is proven that it will result in much better throttle response. better idling, and better gas mileage which is important these days. especially since all the gt owners like me are putting premium octane in it. loosen the bolts and turn it VERY SLIGHTLY, the smallest movement makes a big difference. hows to adjust it from a website....
how to adjust
there are 3 wires on the TPS.
Black- ground
Orange- 5 volt reference
Green- Feed (.95-.97 volts)
ignore the orange wire. turn the key ON but do not start the engine. all readings will be taken with the key all the way on but the engine OFF. tap the green wire with your multimeter and set it to DC. monitor the voltage readings. turn the sensor clockwise or counterclockwise until you get it to read .95-.97 volts. as i said, .96 is dead on. THIS TAKES SOME PATIENCE. do it with both mounting bolts only slightly loose. just the slightest movement will make a big change in the reading. once you have it set, snug the bolts down and re-check. it is possible to throw it back off just by tightening the bolts. now you're done.
i hope this helps some of you... your increases in power/mileage/smooth idle will all depend on how bad it was off in the first place. if you like, check it before you ever remove it just to get an idea what it is reading. mine was running around .80 volts, and i noticed a nice improvement in idle quality and throttle response.
Do not gut a muffler or straight pipe.
A cai will help,but not 15 hp.
indexing plugs is good.
isulateing fuel lines on a efi is a waste of time.
Synthetic oil change in engine,trans.,and rear end is good.
Adjusting tps is good.
Running good plugs,wires etc.is allways good.
Also a new fuel filter,checking tire air pressure helps.
Just my 02 cents worth.......
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Cherish those around you,for at the blink of an eye,they can be gone.
half shafting a throttle body is good for exactly 5% air increase. that has been proven by a guy on here who had a degree in physics i think? as for the intake its good for 3 to 4 horsepower at 3500 RPM's.
exhaust depending on what type you get is good for i would prob say 10 HP at the most. I personally like flowmaster 40 series. sounds good on theses 4 cylinders. but thats your preference. def. do not run straight pipes or you can kiss power good bye.
as for wrapping the gas lines i dont see how that would help? and like said before its prob. a waste of time to do.
no on the TPS idk much about that one. so i have to say your on your own on that one.
**EGR delete i have done this one and i personally dont like it because it takes HOT exhaust and pumps it right back into the intake. so that defeats the point of a CAI.**
also i have done AC delete (or just remove belt) and that helps with throttle response better. i took all my stuff out for the AC. (condenser, compresser, etc.)
as for the spark plugs ive never heard of that ill have to try it. but WARMER plugs are better that colder plugs in these engines.
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(Newer Motor [70,000 miles] Spectre Cold Air Intake, EGR Delete, AC Delete, Cat Delete, Flomaster 40 Series Muffler, Shortened Exhaust, American Racing Outlaw Series II Rims, Stalker Hood, Pioneer Deck Set, 12" Pyle Quoobz, Planet Audio Amp, [500 Watts Total]. Comp Cam [mild], Bored .30 over,
Before we did my exhaust, I was running steady 12.20's in the 1/8th. We added a header w/3" flange, squeezed it to 2-1/2" into a racing bullit muffler(basicly a free flowing glasspack) and then squeezed again to 2-1/4 for the tailpipe. At the same time, we cut off the EGR tube and braised it shut, and finally blocked off the coolant tube that ran to the lower intake.
I took it for a test and tune weekend at the track and first pass was a 11.89, 2nd. was a 11.91.(The air was GREAT that day)
This last Sat. it ran between 12.15 and a best of 12.01 ai 11:00 p.m. @45* outside temp.
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'90 LX coupe , 2.3 Fi. auto. Grocery getter-1/8 mile killer. Mods: removed airbox and silencer, added short cone filter. New exhaust including header and 40 series FLOW, Weld Draglite Skinnies in front, 8.5's with 275/60/15 M/T ET Streets on the rear.Thats right, I EXPLODED a 7.5" posi unit at the track. I sure do miss it.
I'm like a duck, calm and cool on the surface, Paddling like HELL underneath.
Is ALL this true for a quick cheap hp gain??? 
Mods: removed airbox and silencer, added short cone filter. New exhaust including header and 40 series FLOW, Weld Draglite Skinnies in front, 8.5's with 275/60/15 M/T ET Streets on the rear.Thats right, I EXPLODED a 7.5" posi unit at the track.
I sure do miss it.
