i just bought a 4cylinder mustang coupe for 100 buck it has 30,000 miles on it it has a dented fender which i have fixed i bought it to put a carbed 2v in it but i put it in a 82 capri as ive been driving around in the coupe im starting to like the 4 banger it has 8 spark plugs on a 4 cylinders and i would love to put some nitrous on it does anyone know any thing about these 4 cylinder engines
Since you did not mention what year car but did mention you have a 8 plug head I assume its a 91 or later Mustang?
1991 was first year for the dual plug head in a Mustang and should have the Ranger roller cam which does not give a performance boost per se but does reduce friction which does free up a few horsepower. There are performance hydraulic roller cams but the prices seem to start around $365.00
As with most normally aspirated engines the 2.3L respond well to improvements in adding air and removing it.
The motor will have cast pistons so it will be very unforgiving of any detonation.
Weak point of the 2.3L is the rod bolts. I have revved mine to 6000rpm, accidentally of course, with no problems, but I dont recommend doing so, about 5500rpm should be the max.
You can get a Ranger shorty header from a junkyard or on Ebay. They looks alot like the 5.0L factory shorty header and flow much better than stock, plus more importantly...they look cool. Long tube headers are not recommended unless you are rebuilding for a purpose built high performance 2.3L.
You can also cut the bottom of the air box out and duc to inner fender or pull from under the radiator support. It is also highly recommended to install a
K&N or any brand performance style high flow air filter.
On Speed Density cars the air silencer, aka the Strangulator, is inside the intake tube between air box and throttle body.
If I recall correctly the air silencer on the mass air cars is inside the inner fender.
The factory installed Strangulator is intended to deliberately slow down the rush of incoming air so you dont get that loud whoosing sound when you hit the go pedal.
The stock N/A motors typically have about 14lb/hr injectors but if you open up the intake for more airflow and open up exhaust for better flow the engine wants to run lean. Some people have had good success installing 19lb/hr injectors which would normally cause engine to run rich but since engine has gone lean due to being able to breath better it causes engine to go back to normal range. Be sure to disconnect battery and wait about 5 minutes to reset computer if you do this mod.
The intake is typically the four runners in a row which from testing seems to flow about the same as the E6 square style manifold but the 4 in a row style intake seems to have more equal balance and gives a better shot into the intake runner. The heads seem to flow a little bit better than a stock older style D-port head and so far looks to respond as well to porting.
Accel and MSD both make a high energy coil pack that can be used. IIRC you have to get two for a 96+ 4.6L mod motor.
Good luck and post some pics, would like to see the car.