Hey what's up? I don't usually post on here but I know a lot of people get help here when needed. I did a search for this but couldn't find anything. I have a 98 Type R that I bought off a so called friend. There was a Mugen ECU in it before but he took it back and gave back a stock ECU. There's no code or writing on it. How can I tell if it's a Type R ECU and not a GS-R or anything like that? Thanks everyone for your help.

 

the code is on there. just tough to see. look where the plugs are, there will be some numbers there.

 

If your tach shows the vtec coming on at 6k then its the itr. If it comes on at 5500 u have a gsr computer. When driving with the gsr computer u have a rev limiter. The Itr computer doesnt.

Itr computer in neutral will rev till infinity. The Gsr computer will limit your revs around 8200 rpm's.

Miss a gear in a stock ecu gsr your fine.
Miss a gear in a stock ecu type R= bent valves

 

The ITR ECU does have a rev limiter. It's 8900 rpm on my Tach.

 

why would you want to do that? besides, vtec doesn't activate in nuetral.

 

There is also another sticker on the inside of the ecu. Look for the part # p73. Just open up and look inside.

 

GS-R activates VTEC at 4400 rpm, not 5500.

 

There's no such thing as an ECU that can save your motor if you miss a shift. A rev limiter will only stop you from overreving with the gas pedal, if you put the car in the wrong gear your rpm will always be relative to the speed of the car and the size of the gear. It'll cut ignition, but the engine will still be spinning that fast.

 

No, on a GS-R VTEC activates at 5600. Oops I'm sorry I was thinking of the original classic 92-93 GS-R. My bad I forgot about the 94-2001 Integra.

 

the AUDIBLE enagement on a GSR is 5600 or whatever. remember that it is 2 stage

 

That's the secondary butterfly opening in the Intake, and it's just shy of 6000... VTEC is at 4400 RPM... Keep in mind that the tach is off, so you may not see this exactly.

 

Itr's do have rev limiters. I said in neutral it will keep reving.

I said it doesnt have a rev limit in neutral because if you miss a shift in between gears it will keep revving. A friend in a gsr showed me. He was on on the highway doing about 75, dropped it in neutral and revved it, and I saw the tach start bouncing around 8200rpm's. I said mine wont shut off unless your in gear pressing the gas.

Stock itr fuel cut is 8600 rpms which on the dash may be showing higher.
Maybe im retarded. I only spoke because thats what ive experienced.

People who have bent their valves know what Im alking about.

 

so patrick,

Why does my friends gsr bounces when/if he misses a shift in neutral?
You make perfectly good sense though.

 

If your friend believes his car has a revlimiter to prevent overreving when you misshift, first tell him that any damage caused to his car is his own fault and get it in writing. Then tell him to drive about 80mph in 5th then downshift to 2nd. His results will be only bent valves, if he's lucky.

ITRs have revlimiters at 8600 rpm, GSRs at 8300 rpm. Neither have revlimiters to save you from misshifts.


[Modified by Reid, 10:43 AM 5/13/2002]

 

Correct and correct.

But that does make me wonder if the rev limiter works in neutral/ with the clutch in... Assuming it does cause the computer don't care about the trannny.....

 

Umm, exactly how does the ECU know if you are in neutral or a gear? Just curious.....

 

If he misses a shift in nuetral, yeah the rev limiter will stop the engine. That's because he's using the gas to rev the car back up, not the motion of the wheels.

If he actually misses a downshift and puts it in 2nd when he meant to hit 4th, bye-bye motor.

 

It doesn't matter if the ECU knows or not.

Here's an example:

Let's look at the most common mistake, hitting 2nd when you're trying to get 4th.

Let's say you're going at about 100mph and you need to downshift from 5th to 4th for an upcoming turn. At 100mph in 4th gear, you'll be at about 6800rpm on our cars. Now let's say you miss and hit 2nd. You're still going 100mph, but 2nd tops out at 60mph. Since there;s a direct mechanical link between the wheels and the engine (that's why the car revs higher when you downshift) the engine is going to rev up to the appropriate speed (which in this particular case is going to be about 11,500rpm).

For the ECU to be able to prevent this, it would have to have a computer controlled lockout for every gear below 5th. That way you couldn't shift into the wrong gear even if you tried.

 

It is called the speed sensor. It will read if the car is under load or not.