Hey all,

So I am getting close to purchasing an AMR500 to put on my 1996 2.3 (perfect little space where the AC would go). The engine is just rebuilt - .30 over; block milled about 3/1000. New 19 lb injectors; the cam is just a little taller than stock - advanced about 10 degrees though. At any rate, I am planning on running just about 3psi of boost - just enough for a little lower end (an AMR can't handle much more RPMS than that anyways). Should I worry about the stock pistons with this low boost? My calculator is giving about 11.5:1 compression at that boost. Also, can the stock computer handle 120-130 g/sec of airflow without modifications?

Thanks!

 

The stock 2.3l Limas were good for 5psi turbo boost as is(some say 7psi), so you should be fine, the parts ARE 24 years old, lol, but should be fine

 

Ha. Thanks. You know this has just about a new everything on it at this point - except the block. You think I can do just straight piping with no intercooler? I am wondering about the air temp and the IAT.

 

Not sure about the IAT but it should be fine

Air/fuel mix is a WEIGHT ratio, gasoline uses 14.7/1 ratio, so 14.7 POUNDS of air to 1 POUND of gasoline
Or 14.7 grams of air to 1 gram of gasoline

Gasoline's weight doesn't change much with temperature
Air's weight changes ALOT by temperature
Colder air is heavier, because its denser
Warmer air is lighter
"Hot air rises".............because its lighter than the cooler air, less dense

The point of an intercooler is to get maximum power, cooler air weights more so you can add more gasoline and get more power
The warmer air will be seen by the IAT sensor so computer will add less gasoline, the O2 sensor will balance that to get a good burn level

 

Thanks Ron.

I ran it through the gas laws - at 3 psi there will be about a 20% temperature differential at 80 degrees (so about 95 degree compressed air) at 5 psi about a little higher but not too bad - basically like driving in Arizona on a hot summer day - so that looks fine. I will hack the IAT to get a little more gas into the mix and then let the O2 sensors compensate for the rest.

On another note, happen to know the diameter of the crank pulley off hand?

 

No, sure don't