vxo5028

whenever i rev my g37 engine, it will only go up 5,000 rpms? is this normal and is there a way to un_limit the rpms so that it will go higher? seems kinda pointless to limit such a powerful machine

bocaytomas

Sorry for the question but is your car in DS? have you tried switching to Manual? It should rev all the way to 7500

Modme

iTrader: (17)

When the car is not moving, the rev is limited to 5000 rpm.

terrycs

iTrader: (37)

Guess I never noticed that!

vxo5028

i see. cause i tried this when it was parked. my g isnt registered yet so i havent been able to drive it yet. thanks tho

Black Betty

iTrader: (60)

It revs all the way to redline while under load. It doesn't rev over about 5K while not under load to keep dummies from redlining an engine with no load on it.

Ibanez540r

iTrader: (1)

Very well put

High RPM with no load is ALOT different then the same RPM under driving conditions. I always cringe at DUMMIES sitting there free reving the s*** out of a motor to show off exhaust etc. Good way to spin a bearing..

JSolo

iTrader: (14)

What practical functionality would be gained by having this ability?

cereal2k

iTrader: (10)

^ burn outs yo!

but I digress. Unless you are tuned to remove the limit, you will also hit the rev limiter on a dyno no?

JSolo

iTrader: (14)

LOL.. What's the OP have in mind, redline the car, then do a neutral drop? Thus they limit it to 5Krpm under free revving conditions.

I used to ride with a bunch of people that would sit there and rev (at times to some very high rpms) their bikes at a stop light. Very annoying especially when they're running nearly straight pipes. Many times I wished they'd through a rod or spin a bearing doing this. Learn the lesson the hard way.

Edit. On the dyno, the engine is not free revving, the dyno roller is providing resistance to the drive wheels.

cereal2k

iTrader: (10)

I see your point on the not moving. But would you need to go over 7500 RPM on the dyno for more power, not the 5K limit standing still. This would be on a 7AT dyno , not sure if would be the same for 6spd.

JSolo

iTrader: (14)

When you dyno a vehicle, you run from a low rpm (2-3K depending on the operator) up through redline. Some operators will stop accelerating just before redline, others bump off the rev limiter.

Pic below is from my bike, which hit the rev limiter at 11.5Krpm... Not bad for a little 1L engine

Ibanez540r

iTrader: (1)

Cereal2K - are you understanding that the 5k limit is ONLY when in neutral and NOT when in drive? Last few posts you sound confused?

cereal2k

iTrader: (10)

I got that. However we are not limited at redline 7500 RPMs while under load also?

Adam West

iTrader: (3)

I thought fuel cut occurs around 7800rpm, that's the actual limiter.

btw I heard a sport bike free rev to the limiter the other day, made me cringe...