for stock 92-95 prelude h22a peak hold injectors (310cc) you need a resister pack for them to run on a motor that uses saturated injectors. Where does this resister pack hook up to an obd1 b seris motor????? pics would help thanks

 

B series motors use saturated type fuel injectors. The 97+ h22a injectors are also saturated. However, the 1993-1996 h22a injectors are peak and hold type. Peak and hold vs. saturated use different voltage signals to run the injectors. If you try to run peak and hold injectors with an ECU that is supposed to control saturated injectors, you can have a number of issues including: Frying the ECU, frying the injectors, pinging, misfiring, smoke, flame, etc...

So if you want to run peak and hold injectors on a car designed for saturated, you need to do two things:
1) swap to an ECU that can trigger peak and hold injectors (H22a P13 ECU)
2) swap or modify the injector wiring harness so that the correct voltage signals are reaching the injectors - This is what the resistor pack on the 93-96 Prelude VTEC injector harness does. I've been told that there are also Accords that have the same harness and resistor pack, but I don't know what years or models....

If you want to run stock Prelude H22a injectors on a B series, you are probably much better off using the 97+ H22a saturated injectors. I believe that the 97+ saturated injectors are "only" 290cc vs the 310cc in the 93-96 H22a, but they should be pretty much plug and play with a B series motor and ECU...

Hope that helps,
Andrew

 

is it possible to hook up the resistor pack to a b series motor and how do you do it!!!!!!!!!

 

Yes. Get the injector portion of the 1993-1996 Prelude VTEC engine wiring harness. I don't know how B series injectors are wired. So you will probably need a 1993-95 Prelude Helm manual and a Helm for whatever B series motor you have to sit down and figure out how it needs to be wired into the B series harness...

Maybe I was not clear in my first response, but in addition to the resistor pack injector harness, you will ALSO need an ECU that can handle peak and hold injectors. None of the B series ECUs will work... Your best bet is a 1993-95 Prelude VTEC P13 ECU.

And again, for all the trouble and cost this swap would be, you would be much better off just using the 97+ h22a injectors... They are saturated injectors already. That way you don't have to swap ECUs and injector harnesses...

Andrew



[Modified by aklucsarits, 3:01 PM 10/2/2001]

 

thanks alot

 

This is absolutely false information. There are many people who are running only the risistor pack with low impedence injectors on GSR ECU's that were made to support saturated injectors. More and more people using Hondata are being forced to use the resistor pack to move to larger than 440cc injectors.

You can read a huge long thread on this here: http://ferrari.colowatch.com/php/sho...h&Number=31326

but the fact is that alot of them have been used successfully in the real world.

 

Ouch. That's a little harsh...

That's a very good thread you linked to... I'm not sure what I said that was "absolutely false", but the thread seems to confirm what I was trying to say. If you look at what Dale4G61 and JAT are saying, it backs up what I said: 1) You need the resistor pack. 2)You also need, as Dale4G61 said, "some external driver circuitry to make this work" (i.e. an ECU that can handle peak and hold...)

Can peak and hold injectors be rigged to work with a saturated ECU? Yes - but it's a real bad idea. The ECU cannot drive the injectors correctly. How long will that setup last? Most likely you will eventually fry the ECU and/or injectors.... As Dale4G61 pointed out, driving peak and hold injectors with an ECU designed for saturated will result in the injectors not firing as designed and damage to the injector driver (ECU in this case):
http://ferrari.colowatch.com/php/showthreaded.php?Cat=&Board=Member_Tech&Number=322 18&page=&view=&sb=&o=</a> http://ferrari.colowatch.com/php/sho...=&view=&sb=&o= <A HREF="http://ferrari.colowatch.com/php/showthreaded.php?Cat=&Board=Member_Tech&Number=329 30&page=&view=&sb=&o=" TARGET="_blank">http://ferrari.colowatch.com/php/showthreaded.php?Cat=&Board=Member_Tech&Number=329 30&page=&view=&sb=&o=

Ah well... Good luck,

Andrew

[EDIT - I can't spell so good...]


[Modified by aklucsarits, 8:12 AM 10/3/2001]

 

There may defnitely be issues with it. That discussion was very theoretical. The fact is that more and more people are resorting to just installing the resistor pack with low impedence injectors. I have not heard of any of these ECU's going bad, or of any issues with fuel control. No one I know of has been running them for longer than about 8 months, but right now, it looks like it's working without a problem. GSR ECU's are pretty cheap right now.