Re: Airbox performance

[jwit6@xxxx]

If you're looking for free hp, the easiest thing you can do is 
replace the Bosch CIS injection with multiport efi. The CIS air flow 
meter flap robs over 10% of avail hp. Std Bosch o-ring type injectors 
fit the existing CIS injector ports. Use a Simple Digital Systems EM3-
D (sdsefi.com) ECU and run it right off the ign coil. ODD fire V6 is 
NOT a problem. You add a map sensor, throttle position potentiometer, 
air and engine temp sensors, '81 280 zx pressure regulator, and use 
the existing o2 sensor for lambda closed loop. You can keep the fuel 
delivery/return lines, stock ignition, idle speed motor,and the 
intake track plumbing including the air filter housing which is not 
the problem with performance on this engine. You can ditch the fuel 
distributor, accumulator (if you want to), pressure regulator, cold 
start valve, frequency valve and the lambda ECU.This is a very simple 
upgrade to get you close to 150hp estimated. Programming is simple. 
I've already done it.