?

 

The 1993 Prelude Helm manual lists them as rated at 310cc. However, in real-world conditions, they appear to flow 10-20% higher than that in actuality. A friend of mine sent his old Prelude injectors to RC Engineering to get them cleaned and flow tested. They tested and rated them at 350cc.

Andrew

 

are they peak and hold? if so could it be wired in to my 95 ls motor?

 

The 92-96 H22A injectors are peak and hold.

What kind of ECM are you using? Ideally you would use an ECM with injector drivers designed to drive peak and hold injectors like a standalone EMS or a Prelude P13 ECM. ...But this whole subject is normally a heated debate between those that say any old ECM will work, and those who say that an ECM designed to drive peak and hold must be used. I'm of the opinion that it's a really bad idea to drive P&H injectors with a saturated injector driver...

If you are using a stock LS ECM, you would be better off with the 97+ H22A injectors IMHO. They are rated at 290cc, and they are Saturated. So they will work just fine with an LS ECM.

Andrew

 

what exactly is an ECM? so u dont think its a good idea to wire in the resistor box from the prelude and run the wires into the injectors? I have heard it will work fine....i am running a 95 ls in my 93 coupe with stock wiring harness and ecu....

 

ECM = ECU = Engine Control Unit = Engine Control Module = Engine Computer

OK. Read this stuff first about Saturated VS Peak and Hold injectors and injector drivers:
http://service.gm.com/gmtechlink/Feb.../fi%20test.htm (Great article. MUST READ!)
http://www.twminduction.com/EFI/EFIInjectors.html
http://www.supras.com/~riemer/sonict...rs/RCtech.html

The real issue is what fuel injectors you are using and what injector driver you are using with them. The injector driver is built into the ECU. Most Hondas of the OBD era use saturated injectors. Honda D and B-series motors have saturated injectors. One of the exceptions is the 92-96 Prelude, which has peak and hold injectors.

In general, the injector driver should match the injector. Some Peak and Hold injector drivers are capable of driving Saturated injectors. But the general consensus is that a Saturated injector driver should never be used to drive Peak and Hold injectors. (Although many Honda people try and and apparently get it to work OK... for at least a while) Then you have standalone EMS packages like Electromotive TEC-II/III , FJO 341B, and Haltech E6x series which can be configured to drive either injector type because they were designed to be able to drive both types.

Andrew