what are the advantages/gains? disadvantages? complications? thanks

 

i cant help you much but check out importreview.com they have a dyno chart of the two comparing them on the h22

 

hmmmm me no likes

 

I wouldn't go by that, that dyno isn't right.... I am going to Hopefully soon dyno my, almost stock prelude to get a baseline, and then the GSR ecu to compare..

 

Speaking of OBD1 GS-R ECUs... I am looking for one to buy. If anyone has one laying around for sale, please let me know via IM.

I also have an OBD1 P13 H22a ECU with the Dinan program if anyone is interested in some sort of trade too...

Andrew

 

whats wrong with the P13?

 

Speakin of the Spoon P13 ecu.......How much is it???? I cant find any prices for it. Anybody know of any sites i should check??

 

The problem is that the P13 is for peak and hold injectors. The Dinan P13 I have is left over from my previous car - a 1993 VTEC. But now I have a 5th gen with saturated injectors. I do not want to hack into my wiring harnesses to add the resistor pack. So I need an ECU that is designed for saturated injectors.

The GS-Rs all have saturated injectors. The GS-R P72 ECU will simplify what I want to do...

Andrew

 

you may want to research that. at first everyone said you needed an obd1 distributor and the resistor pack. but everything i've heard lately is you don't need either. I have a P13 in my basement, just have to figure out if I want to go through the expense of a harness and reprogram. But I'm pretty sure you don't need the resistor pack...

 

here you go guys:


look at how lean it runs. yikes! of course that can be tuned out, but this was for testing purposes- stock vs. stock. the car on a p13 runs 180 hp/150 lb/ft, but a lot less lean, and has a much happier midrange on both torque and hp.

this is the same engine on a p13. you must remember that this dyno is without some of the stuff the above dyno has- namely, the thermal exhaust, which found a good 6.5 hp.

 

wa that on a 5th gen or a 4th?

 

Nice. Great info there... Keep it coming.

Flavour: I've done better than research it. I've tried it. We tried my P13 in a 5th gen with just a convertor harness about 1 1/2 years ago. Everthing was great for about 50ft down the street before we got 3 different CEL codes... This was with no other modifications to the car... The codes were 8 - CKP sensor signal , 72 - some missfire code, and another that I cannot remember.

I am convinced that mixing and matching ECUs and different injector types is a bad idea... Not just because of the CELs we go that may or may not have had to do with the injector/injector driver difference, but because of the unpredictable fuel delivery such a set up may give...

I am planning on sticking with an ECU designed to drive saturated injectors. The GS-R one seems the best option at this point. I'm glad I saw these plots because that thing is running WAY WAY WAY too lean. I'm hoping that a V-AFC will be enough to correct that problem....

Was any further tuning done on the car in the plots with the GS-R ECU to attempt to correct the lean condition?

Andrew





[Modified by aklucsarits, 1:01 AM 2/3/2002]

 

well. . . . technically, neither. it's in my car, but the engine is a 4th gen motor.
'92 h22a1. just so you guys know, on a later dyno (but before the p72 dyno) with the p13 and with the addition of the thermal the motor now makes 180 hp 150 lb/ft. so while it looks like the gsr ecu makes more hp, it actually makes 2 less. . . .

 

not to nit pick, but there was never a 92 h22a1. that would be a usdm motor, but it was never offered in 92. maybe you mean a jdm 92 h22a.

 

hmm, I know there's someone else who tried it and claimed no problems. Very strange. If I can find out who I'll post it up...

Oh well, either way if I do go OBD1 I'm going to reprogram the ecu (I mean, that's the only reason I can see doing the swap in the first place) so I'll make sure that compatible injectors are programmed in there. 1 or 2 hp just isnt worth losing the immobilizer. But hopefully a programmed ecu will gain more, who knows.

 

blah
yes it's jdm
i added a '1' to the end for the less educated so there wouldnt be any mistake between jdm h22a and h22a4

 

GSR Ecu + H22 (both OBD1) = Need a vtec controller to move vtec, then you are back in business, only stronger

 

Or just have your stock ECU re-chipped for less, and be done with it.

 

Or go hondata and be done with it all!

 

gimme a month and i'll have a dyno for that too