Had a discution with some other Swedish ITR owners and they said that their rev limit was 9000rpm...this cant be right? Mine does only 8400 and the stock camshafts maximum power is at 7900 for Euro ITR, so why would Honda put the revlimit at 9000?

So what is the official rev limit for Euro ITR 98-00?

 

http://www.kvien.no/integra/bi...3.jpg?

 

Some of them revs to 8400 rpm real (about 8700 rpm on the tach) and some of them revs to 8600 rpm in real (about 8900 rpm on the tach).
I think it depends on which year it's made.
Mine is a '98 ITR and it revs to 8900 rpm on the tach.

 

BTW. The red line on the tach has nothing to do with the rev limiter set by the ECU. And the tach is a bit off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DutchITR1689 &raquo;</TD></TR><TR><TD CLASS="quote">BTW. The red line on the tach has nothing to do with the rev limiter set by the ECU. And the tach is a bit off.</TD></TR></TABLE>
Thanks. Learn something new everyday.

 

I know..but how much is the REV limit on the ECU? It cant be higher than 8400 cuz the cams have max power at 7900.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by John_Doe &raquo;</TD></TR><TR><TD CLASS="quote">I know..but how much is the REV limit on the ECU? It cant be higher than 8400 cuz the cams have max power at 7900. </TD></TR></TABLE>

The US rev limiter and fuel cut is 8600. The redline is 8400, but thats just a visual thing on the tachometer, nothing special happens in the ECU when you get to 8400.

I'm pretty sure, but not certain, that the Euro ITR Rev limit is the same.

 

It should be 8500.

 

Having a 8600 rpm rev. limit is useful even if the max. power is at 7900. That's because it's faster to shift up a bit further pass 7900 rpm.
I think officially the ECU rev limit is set at 8600 rpm for most ITR's. But some EuroITR owners say his ITR's limit is set at 8400 rpm (measured with V-AFC).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by John_Doe &raquo;</TD></TR><TR><TD CLASS="quote">I know..but how much is the REV limit on the ECU? It cant be higher than 8400 cuz the cams have max power at 7900. </TD></TR></TABLE>

Also, if you follow the horsepower curve, it is good to go past the peak HP because the goal is to have the largest area under the HP and TQ curve. Setting the revlimiter and redline where you can maximize the area under the hp/tq curves between shifts (measuring the area of the curve between the upper limit, the rev limiter, and the lower limit, the rpm where the shift lands you) is very important.

 

The ITR DC2's from 00 have the same camshafts as the CTR Ek9, and those cams have a higher max power(i think it's 8200), and most US itr's are from 00-01 so i think u have those cams in your engine.
Lets say this way....with stock tires 195-55-15 how much does your second gear go to? in km/h ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by John_Doe &raquo;</TD></TR><TR><TD CLASS="quote">The ITR DC2's from 00 have the same camshafts as the CTR Ek9, and those cams have a higher max power(i think it's 8200), and most US itr's are from 00-01 so i think u have those cams in your engine.
Lets say this way....with stock tires 195-55-15 how much does your second gear go to? in km/h ? </TD></TR></TABLE>

With those CTR camshafts in the B18C6 doesn't mean the power increases after 7900 rpm. The difference is very small and other parts are also important.

I don't know the real speed, but on the speedo it goes to 90 km/h max. in 2nd gear. The reading on the speedo does not depend on the tire size. The real speed does.

 

To clear this up:

- The ECU cuts at 8400rpm stock
- The torque curve starts to drop at 8000rpm
- Power curve can increase until cutoff if you tune it a little bit

Here ist my dyno: Rev limit stock at 8400rpm and raised at 8800rpm. The power curve doesn`t drop.

 

EDM - 8700 real / 8900 on tach

 

Is that a bone stock motor though?

 

Mine is 2001 CDM and it read right at 8400 rpm on my tech.
I never could let it pass 8400.. it fuel cuts at 8400

 

8400rpm. NOT higher. That`s what the base-software contains.

 

My fuel cut is near 9K...I think it's @ 8900 and it's a '98 ITR. Maybe the previous owner reprogramed the ECU.

 

lol, if you rev to 8900 on a stock car you'd feel the power drop off. ****, I feel it flaten at 8100.

 

before Kenji mine revved it 9k even on the tach, now it reads 9,400

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ITR5874 &raquo;</TD></TR><TR><TD CLASS="quote">8400rpm. NOT higher. That`s what the base-software contains.

</TD></TR></TABLE>
Sven, some stock ITRs (some Euro spes) do rev till 8600 rpm measured with V-AFC. And some of them also measured on the dyno.

How accurate is the V-AFC, anybody knows?

 

mine idicate 3500 rpm @100 km/h ( so my tach is pretty acurate ) and the rev limiter is at like 8600-8700 rpm...

 

Thanx my fellow Euro ITR owners.
So the official rev limit is at 8400. I had some Euro ITR manuals at home in german and all of them had a graf diagram and the top of the X axle was around 8400.

 

As far as I know the fuel cut off s at 8600rpm. On the rev counter you see 9000 at that point.
This is my dyno:
Dont ask me why the dyno says 8720rpm max.....

Its done at a mustang dyno so dont look at the wheel power. We had to strap her real tight to prevent wheelspin when Vtec kicked in, so the losses where a lot higher than normal.