B16B safe RPM limit ?


turbociv910 said:
your tach is no relevance to how many rpms your engine is turning. The RPM on the tach is only a signal from the ecu, somtiems weaker and older clusters tend to be off, its not -+500, its a % off.


My stock Ek9 ECU turns to 8600 on the dot, my cluster reads 9000ish
Take it to a dyno to really tell how high its turning.
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You can plug am aftermarket tach on the distributor cap and you will get a exact rpm... cause it counts the impulsions send. But try to keep your wire as short as possible else, you get kind of a delay
 
OFC getting performance valves, valves spring, retainers, rods are good upgrades to make it safer, and even being able to rev higher. But the manifacturer's safe rpm is 9k
 
7krpm piles on hard because of exhuast mods. Especially if your using 2.5in. With a 2.25 or stock 2.0in, it piles on hard before 6500rpm.

If you have basic bolt ons, you normally shift your peak torque band upwards, so the stock figures are just for baseline. Shifting at 9000rpm will go faster especially when you have basic bolt ons... But if you add tuning and use some high octane fuel, you can still make power at 9000rpm.
 
B16A2R said:
Bon87,
I use apexi rsm and it seems to give quite accurate reading,(when tachometer at 3k, rsm +-between 2960~3020 rpm and at nearly 9k just before cuts off, 8950~8990rpm. I guess the rsm is also inaccurate too :secret:
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Other than an RSM, whats would be ideal? external Tach' like Babyface's Defi tach, which is wired into the ECU?
I think I might have to do that...
 
GekKey said:
If you type b16b specs on google you will get this info
HP/Torque: 185hp@8200/118lb-ft@7500
Redline: 9000 rpm

This means... You get your peak HP @ 8200, and you get your peak torque @ 7500... CONCLUSION: no point to go beyond 8200 cause theres no more HP gain... However the b16b redline aka cutoff is at 9000 THIS IS the safe RPM limit stock.
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not true, google is wrong. the revcut is 8600rpm, this has been verified numerous times via external devices that monitor RPM like apexi afc/other gauges etc... and there if you dont rev past 8200 you will fall out of vtec so there is a point.
 
blinx9900 said:
not true, google is wrong. the revcut is 8600rpm, this has been verified numerous times via external devices that monitor RPM like apexi afc/other gauges etc... and there if you dont rev past 8200 you will fall out of vtec so there is a point.
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kinda weird how honda give the specs and say redline is at 9000.. but anyways tks on info...
 
Every B16b got diff vtec point ?? i thought is 6200...
i tried to rev till cut... but my meter oni till 8000rpm, so cant read..
But my speed meter cut at 200kmh.. and the stock ecu cut at 180kmh rit??
Wats the Actual Vtec point of Stock B16B?? anyone know?
britishracer said:
Stock EK9 VTEC point: 5,920~6,160 rpm

I have found when compared to dynos and various parallel engine speed meter attached to the ECUs like RSM and the like that inaccurate readings tend to happen with Civic tachometers. Especially when past 7800 rpm and towards the redline. The DC2 Integra meters tend to be a little inaccurate between 3000 and 4500 rpm but varies. Towards the redline its almost spot on...well at least mine is..I still can't figure out why. My DC2 runs a stock ECU and cuts off at exactly 8600 rpm.

I don't know about others here but I have found that APEXi Power FC Commander readings to be quite spot on.

Any comments?
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this thread topic is starting to annoy... therefore to answer all future questions...

JUST REV THE **** OUT OF IT!!
 
Ma Tek cums n @ 7000rmp nd revs the hole way 2 12,500rmp...

On ITR-DC2, they say its safe for tegs to rev to 9000rpm, but as said, the car is probably just revving to around the 8600, The standard valve train can hold the spoon's ecu rev limit of 9200rpm on a stock car fairly easy apparently.
Thats integras though, (jdm)
And in type r legends the rev couner must be very accurate on those almost brandnew cars as it shows the car cutting out around 8600 when they are doing the quarter miles, just a thought
 
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WOuld someone like to correct him or her? .....

MugenSi said:
Seeing as there all sorts of figures flying about for what the actual factory rev limiter is on a standard ITR P73 ECU, i thought i'd throw up proof that the figure is 8400rpms.

And to show proof, here is the original Fact Book from Hondas website on the 96spec ITR when it was first introduced back in 1995. And to anyone claiming that figure was upped in the 98spec or the UK spec car, it wasn't, theyre all the same.

Look at the chart mid way down on the right hand side and look at the figure given for the Maximum Number of Rotations..... 8400rpm.

ITR Fact Book Click on 'Overview of Performance Technology' and scroll mid way down the page.

So there! :lol:

Here ----->

Integra DC2 :: Log in
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Bon87 said:
WOuld someone like to correct him or her? .....
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well i don't know if there is any correcting needing to be done, Honda's official statement was that the limit was 8400rpm and thats what he is saying, now i don't believe the revlimit is 8400rpm but that is what honda said...
 
But everyone on this forum agrees with you that its at 8600.
Im so confused lol
Forget it...
 
speedo are out in many cases but lots lots of people have equipment to show pretty accurate peak rpm and all those stock ek9 and dc2 that go on dyno where limiter kicks in shows it too
 
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