andy.downes

iTrader: (1)

Just out of interest, I was thinking how safe it is to rev to about 6k continually when having a blast. I always cringe when I'm using the full rev range of my 2006 slightly remapped hawkeye thinking I'll blow it up if I continue.

Just interested if anybody else feel overly-mechanically sympathetic...and any experiences of driving style to make me feel better (or worse !)

Cheers,
Andy

KAS35RSTI

iTrader: (73)

If it happily revs there then why not. All depends on how its mapped/setup. On a stock car I would change at 6kish

Scooby Stevo

iTrader: (1)

i do - just bought a honda type r and the vtec only kicks in at 6000rpm

cookie sti

My scoobs is running a vf22 and its only in the mid range of boost at 6k so its often up well past 6k when driven in anger which is about 15 mins after and before its started and stopped lol

banny sti

iTrader: (68)

Yep regularly past 6k for me, as full boost starts at 5.5k at the moment lol

Dan-

Only when on track, otherwise 5.5 is my gear change rev!

eggy790

iTrader: (20)

your midrange is crap bro lol

banny sti

iTrader: (68)

Got no AVCS bro, whats your excuse

Fonzey

iTrader: (5)

Another Type R driver here, but hopefully not for long!

My car may aswell idle at 6k

chocolate_o_brian

iTrader: (22)

Very rarely here but that's as my uk classic is mapped on the TD04 so it's a big gutless at 6,000rpm. On a positive note though 1.45 bar boost at 3,000 rpm

stonejedi

iTrader: (51)

Everyday.

chopperman

Now and again, dont really get much opportunity to give mine the beans. My car makes its power and torque very low down so it can be driven quickly without having to rev.
I make max torque at 3750rpm and it starts to drop off at 4500rpm and max bhp at 4500rpm and drops off at 6400rpm according to delta dash.

prodriverules

iTrader: (52)

Lmao

eggy790

iTrader: (20)

lol mines a vtec

Osimabu

iTrader: (2)

It always makes me chuckle when I look at the revs cars do. My old 1991 CBR600 (motorbike, in case that's confused you) happily went to 13500 rpm and I had no qualms at all about doing it. The later Yamaha R6s went to 15500!

As to the car though, 6000 rpm is going quite quickly enough for most situations.

chopperman

Yes but a CBR600 is only 150cc per cylinder so has tiny light pistons. You have to remember a piston has to come to a dead stop then accelerate twice in its 360* cycle so piston mass is a huge factor. You bike may rev but look how little bhp and torque it produces per rev.

Osimabu

iTrader: (2)

Indeed. It makes you wonder how the Honda SP1 & 2 rev to 10000 and stay in one piece. I was going to include Ducatis, but they sometimes don't!

chopperman

I think they get the higher rev ceiling by not over squaring the engine as much ie longer stroke to reduce the piston mass. Also bike crank webs are a lot lighter than cars so less rotational mass as-well.
Yup about Ducati's

c_maguire

The limiting factor is average piston speed, by having an oversquare engine where the bore is larger in relation to the stroke the piston has to travel a shorter distance for a given RPM than an engine with a longer stroke. So oversquare engines are more rev-friendly.

Jacko4130

iTrader: (3)

Mine goes past 6k every time i drive it, Why bother having the power if you don't use it.

andy00v7

I rev mine over 6000 rpm quite often . The shift light is set at 6800 rpm . (v7 jdm) .

Andy

GoML-STi

My shift light is set at 6k and I rarely hit it. There is no need to rev the nuts off your car and it can cause your bottom end to die

chopperman

Yes but the piston has to then reach its speed in a shorter distance before coming to a dead stop at TDC, then again a BDC. Your correct in a over square engine has a higher rev ceiling than a long stroke but an over square engine also generally has a higher piston mass to move.
With the point being made about V2 bike engine compared to I4 Bike engines, the I4 is more over square than the V2. both have issues in that the v2 is longer stroke to reduce piston mass reducing revs but increasing torque . The I4 is over square which can rev higher due to piston mass being reduced because displacement is spread over more cylinders.
This is getting off the original point somewhat, which was why the bike engine revs higher than the cars. The reason i gave was piston mass and heavier crank webs.

ad uk

iTrader: (6)

Can jdm rev to 9 k ??thats what I heard

andy00v7

My Standard v7 jdm sti will rev to 8000rpm that's we're the red line starts . Ecu cut off is approx 8250 rpm .

Andy

SouthWalesSam

iTrader: (1)

Ditto.

That's what I had EngineTuner build & map it to do!

And with max torque at 3700 and max power at 6000 it's in it's element spinning between 3500 and 6500.

wiley

iTrader: (63)

I change gears as soon as I go a little over full boost lol

Wiley

speedking

Are we talking normal driving or missed changes

TonyBurns

iTrader: (3)

I dont normally go past 3k in mine, but it is a diesel and doesnt rev to 6k

Tony

ac autos

every outing!!!