Whats the top speed of a JDM H22?? - Honda Prelude Forum

BlueLude1 · 09-21-2003, 01:36 AM

Hey Marsh was saying that the JDM H22 was limited to 118 an then fuel cut off hits I was just curious if this happens to everyone or if some of us are lucky :P . I've heard they are suppose to be able to go 145 hadn't heard about the fuel cut off. What can u do to fix it if thats the case?

Zimmlude · 09-21-2003, 02:00 AM

The JDM P13 ECU has a speed governer at 180 km/h. This translates to around 113 mph. You can get electronic devices that will eliminate this though,

HTH,

B0b · 09-21-2003, 07:51 AM

any specific electronic devices?

drelude95 · 09-21-2003, 08:25 AM

VAFC

slp mode · 09-21-2003, 10:45 AM

The vafc will not eliminate that, you either have to get your current jdm p13 chipped with a different program, which I did, this will also raise the red line which greatly improves power because you are able to be a little higher in the power band in the next gear, which makes a huge difference, also it does eliminate the top speed govenor, my prelude with jdm h22, h,vafc,cai,no balancer belt will peg my si, speedo at 140, and still pulling a little, so 145ish give or take is about right, I would say a realistic number given that our speedo's are not accurate at that speed would be somewhere in the 130's real speed.

Another fix it is getting a usdm p13, or getting a p28 wich I also have, and get it programmed for a dohc motor.

there are difference of opinions on the p28's, and p72 wich is the teg gsr or type r ecu, I forget which. some opinions are good and some are bad.
my jdm actually ran very strong with my p28 the only reason I got rid of it was because it did not have a rev limiter, you just have to make sure the chip you put in it has a limiter or just buy a ignition with one.
hope this helps
matt

vipastyle · 09-21-2003, 11:04 AM

Are the Hondata applications made to change these kind of settings on the ECU?

concLude · 09-21-2003, 12:50 PM

not for the p13...do you even own a car yet?

yohan420 · 09-22-2003, 12:48 AM

WHAT!*#%!*%*!% My usdm h23 goes all the way to 220km/h for sure but i can't see it cutting out before 240 (redline and then some) ... hmmmm ...

Can we get a breakdown on what the P13, P28 and P72 ecu's are all from?

P13 - h22 prelude
P28 - ???
P72 - ITR

Do these have to be re-programmed or can I take mine to a place that can actually tune the ECU of my existing ecu in my car or do they patch on a new program or .. ?

vipastyle · 09-22-2003, 05:11 AM

Quote:

Originally posted by concLude
not for the p13...do you even own a car yet?

One more month away.

concLude · 09-22-2003, 06:30 AM

I'm pretty sure h-t or sho has a huge list of engine and computer codes, i should be studying or else i'd look it up for ya.

jsmooney · 09-22-2003, 06:49 AM

tannie will end up with a s2k or something

slp mode · 09-22-2003, 08:05 AM

a p28 is the ecu from a single cam vtec motor, like the civic ex. and you have to get them chipped or rom tuned, rom tune is they plug your ecu into a computer basically and play with all the settings. thats all they do with the chips, then just sell them.

BlueLude1 · 09-24-2003, 07:16 PM

Hey you know come to think of it I forgot but when I got my car dynoed Stoney had it at lil over 125mph in 4th .... I guess that answers the quesiton about the governor on my car

Can't believe I forgot that

ds2000 · 09-25-2003, 02:08 AM

I had 135mph outta my JDM 5G SiR, I didn't get into 5th gear either, I still had a few 100rpms to go in 4th as well, scary speed

Satan_SRV · 09-25-2003, 03:22 AM

A JDM engine with JDM tranny has the same top speed as a USDM 4th gen VTEC. THey are they same gear ratios.

BlueLude1 · 09-25-2003, 06:36 AM

Ya but when your coming from a H23 tha difference is noticeable

Sonik_Fury · 09-25-2003, 03:26 PM

There is an old issue of Car & Driver that had a special about cars that did 150mph for under 30k.....radar verified.....and our beloved 4th gen VTEC prelude was one of them..............

slp mode · 09-26-2003, 08:03 PM

I don't see a stock 4th gen, doing 150, my car wont do that and it's far from stock. Maybe it's because of my h23 tranny.