JDM Engines and USDM ECUs - Honda Prelude Forum

Riptide101 · 01-05-2002, 05:28 PM

Just wondering if anyone in here has a JDM engine in there car but using a USDM p13. Just wondering if there are any problems i.e. check engine light coming on and stuff like that. Appreciate any info.

LudeTec · 01-05-2002, 06:31 PM

I am using a USDM P28 just fine and I have a JDM H22. Hope that helps.
Josh

Absolut · 01-05-2002, 07:54 PM

I have a JDM H22a and a JDM p13 ecu, the only differance I know of is the JDM ecu's have a 113mph speed limiter.

CrazyKid · 01-05-2002, 09:08 PM

yah i have a jdm ecu... speed limited at 180km/h... which sucks ass.. you can hit it in 4th gear... ahhh well only $140 CDN to get that remapped... hehehe then ill be flying again...

Bill

Riptide101 · 01-06-2002, 02:35 AM

Whats a p28 anyway.

Prelude_RCR · 01-06-2002, 11:06 AM

Quote:

Originally posted by Riptide101
Whats a p28 anyway.

An ECU.

But doesn't Japan run on higher octane gasoline? Hence the higher compression ratios?

U.K VTEC · 01-06-2002, 11:24 AM

Quote:

Originally posted by Prelude_RCR
But doesn't Japan run on higher octane gasoline? Hence the higher compression ratios?

Yeah, I'm sure it's around 100 or so. My car is supposed to run on it but we get 98 over here and I had the ECU remapped to suit it.

LudeTec · 01-06-2002, 12:08 PM

A P28 is from a SOHC Civic EX. I use it for hondata because a hondata doesn't work with a p13.
Josh

ckchi · 01-06-2002, 12:18 PM

Quote:

Originally posted by Prelude_RCR

An ECU.

But doesn't Japan run on higher octane gasoline? Hence the higher compression ratios?

that's something i never thought about with an engine swap... i was thinking of getting the jdm swap, but the highest octane we get is 93... so could i make this work or not even try?

Prelude_RCR · 01-06-2002, 12:28 PM

It's okay to run 93 octane gasoline in a JDM engine. Even though they are tuned for 100 octane, they'll still run on 93 easily. Just don't go below 89 octane, to be on the safe side.

Low octane + high compression + hard driving = detonation. Use premium and you'll be okay.

Absolut · 01-06-2002, 05:41 PM

Quote:

Originally posted by ckchi

that's something i never thought about with an engine swap... i was thinking of getting the jdm swap, but the highest octane we get is 93... so could i make this work or not even try?

Damn you! The best we get in Cali is 91

!!

JDM Lude · 01-06-2002, 06:24 PM

<--- USDM 4th gen ecu w/ JDM motor

The Acclude · 01-06-2002, 08:24 PM

USDM motor + JDM ECU x The Accludeâ„¢ = Running fine

BB1-4WS · 01-06-2002, 09:46 PM

Most JDM motors are 10.6:1 cr, unless you score yourself a Type-S or SIR S-Spec which are 11.0:1 cr.
There isn't much difference between the two motors except for the different pistons, cams, distributor (internal coil), and fuel rail (opposite direction).

JDM ECU's have slightly more aggressive ignition timing and fuel maps too. They're designed to run on 100 octane, but I haven't experienced any problems on 93. The A/F readings were still in the 12-range when I put the car on the dyno.

BluLuder · 01-07-2002, 03:43 PM

Al, whats up man. You got the engine in now?!
Hows it running? hit me up.. shady@hoffmanbikes.com
If you need help finding an ECU or something, let me know. -Erick

Prelude_RCR · 01-07-2002, 05:19 PM

To the guys with the JDM H22 swaps,

How much did the entire swap cost you? Who did the install for you? And WHERE did you get your swap from? I'm looking for a REPUTABLE place to purchase an H22 from....JDM or not.

Thanx!

JDM Lude · 01-08-2002, 09:48 AM

weww.hondamotorsonline.com

JDM H22 w/ LSD tranny, $2900