Moles Dad

Well, due to inverted peer pressure I have been extending my power delivery parameters (revving the engine) up to and sometimes beyond MY norm.

Usually (for I am Mechanically sympathetic) I only rev up to about 5k...today I started using the remainder

All I can say is I am supprised at the amount that the poor little engine kept on pulling.

One question....how many of you do the same?

(I know Toby does )

As Mole (kept on) says...if Subaru thought the safe limit was 5k they would have put the redline at 5k, spose he has a point....poor little engine

Wadya reckon?

SCOSaltire

I dont go past 5.5k much (maybe twice a day)
hardly ever past 6k (once every few days)
never past 6.5k (coz it lost alot of pull by then)

Can you imagine if subaru had put the limit at 5k?
Alot of modding goint on i think

If the government thought it wasnt safe to smoke they would ban it.

johnfelstead

depends where i am driving. I rarely go above 7K on the road, on track i usualy upshift at 7500rpm but on some corners will take it up to 8K rather than upset the balance of the car with a mid corner shift.

Moles Dad

LOL...you have a point

My norm was (is) up to 5k every day, with very rare excursions into 6ish when making a point with our 'locals'

On our private road we 'normally' get around the 85 - 90mph mark whilst 'shortshifting' up to around 4500 - 5000rpm, today we took it round to 6000rpm....indicated road speed of 110 - 115mph

Just amazed that it kept on pulling really.

Edit....sorry John, slow typing (and driving ) Yes, I too try not to shift mid corner...8K? Oh one of those 'special' gearboxes then!

Might have a 7k 'trip' tomorrow

[Edited by Moles Dad - 10/17/2002 9:10:04 PM]

STi wanna Subaru

iTrader: (1)

I Rev to 6500-7000 rpm quite often when I get the chance. It also mean that when you shift up you're right in the middle of the power band. At a recent RR my car showed peak bhp at 6500 rpm

ozzy

On my daily commute I rarely go above 4/5K. Usually, I just short-shift around 3K if I'm on the motorway in cruise mode.

If I'm going for a blast, then I'll use the whole lot

When John Banks gave me a Tek3 to play with, I bounced off the rev limiter twice I was having so much fun

Stefan

ozzy

Just think about the hard time an 19,000rpm F1 engine's having. And nowadays they ain't much bigger than the wee Subaru jobby

Stefan

[Edited by ozzy - 10/17/2002 9:15:36 PM]

Moles Dad

Yeah, It does depend on mood too

Poor little engine...I still think so

I cant afford the rebuilds an F1 team have

ozzy

Just buy a Ferrari then, they're pretty reliable. I'd stay clear of a beemer or merc though

I'm with Mole, if it was only safe under 5K, they'd have stuck the limiter there. Join the 7K club, you know you want too

Stefan

scottdg

MD,

2.5 yrs later and Iv'e seen 7200 most days time and time again. No probs with the car, it's still pulling like a train ( a very big fast one at that!!!)

Go on you know you want to.

johnfelstead

no, one of those special engines, rev limiter is 8250rpm. red line is 7900rpm.

UkLegacyT

mine sees the redline in every gear

DaveD

iTrader: (2)

My '93 WRX needs to see 6.5k to be on the power on the upshift....hence when driving hard regularly sees 6.5 to 7k

Two and a half years later, and still going strong (and occasionally above 7k!!)

David_Wallis

Red Line everyday, licence permitting.

tweenierob

LMAO @ DW
even sundays
Rob

raybotha

Personally I like the light throttle high rev approach to driving . Let the motor spin to torque peak and get ready to hammer it to red line . MD I read its worse to labour a motor with large throttle at low revs than use high revs . Just like a turbo is good for an engine because it creates a more even strain on the crank (where naturally aspirated motors have a big bang followed by a free wheel effect - the turbo is more consistent) I have never felt sorry for a motor when revving it . Every time I drive I picture myself qualifying , clipping curbs ... Sometimes I am only on a warm up lap , till the traffic parts . Nothing better than caining a car 100 mph , slowing down and speeding up again . Thats why I bought an Sti , revs like @#$%^ .

On the other hand if you dont rev it it will get lazy , thats what I tell myself , BMW manual states use above 4 000rpm nessesary to cleaning motor ...

Enjoy the damn thing , I'll pay for the rebuild if it blows LOL .

Ray

Toonman1

I use 6500+ whenever I can and have done since my first Scooby (April '94). None of the 4 cars have suffered in the slightest.

mutant_matt

Depends on which car you have. On my MY00UK (with the little turbo) I used to change between 6-6.5k when going for it (as there was nothing above 6.5 so little point in it anyway). On my new STi with the standard exhaust it's choking beyond 6k at the moment so also little point going much further.

Once it's finished loosening up and has a free flowing exhaust, I'll use all the revs (7.5k). Just make sure it's warmed up before you start driving it "properly"

Also bear in mind that one of the reasons the non-STi cars have a limit of 7k set is that they use heavier cast pistons and put more strain on the rods, which increases with rpm. The STi's with forged pistons, which weigh less, put less strain on the rods so you can afford to rev it higher.

JohnF has an RA which has a higher limit still (as I think he mentioned).

Matt

[Edited by mutant_matt - 10/18/2002 9:05:22 AM]

AlexM

N.B. just to point out that using the available revs during acceleration is not the same as continuous high revs / load you would see during a prolonged maximum speed run.

In the latter case, the intercooler would heatsoak, oil and water temps would rise, as would EGTs when holding max throttle / rpm. This isn't advisable.

Running the engine out to maximum revs through the gears is fine.

As others have said, the rev limit is set to protect the engine from failure due to inertial loads on big ends / rods, and is probably reasonably conservative from a mechanical point of view. In contrast, an F1 engine's rev limiter is set only 100-150rpm away from a level that would not enable it to complete a race simulation on the engine dyno!.

I usually change up at 6.5k simply because power and torque fall off dramatically, and it isn't necessary to rev further.

Cheers,

Alex

LG John

Now with Tek3 and full decat I'll got to 7k in every gear. This means very quickly after you've changed the boost is dropping again but nevertheless I still think it has enough pull such that this method gives the best acceleration. A big turbo would make it even better Must resist!!! Always let her warm up first though before using boost and revs.

Moles Dad

LOL....Spose I must be in the minority then, part of getting old I am told !

I will try and drive it 'properly'

Gotta go, off to Kent meet, need to find my toupe

RB5SCOTT

7000rpm means the piston does 116 full cycles a second

Scott

p.s 5000rpm. My car never goes below it

Trumble

Every day 7k here I come (only when warm).

And on the odd occasion when I am desperate to get home from the pub the wife does it too !

T.

john banks

7000 RPM (or should I say 6990 ) whenever possible. I would increase the rev limiter to 7500 RPM for regular use as it still pulls really well with a bigger turbo, but I am keeping some sympathy for the Dairy Milk internals.

Suresh

Before Tek3, 5,500 was the level at which MY99 started to get a little asthmatic and flattening out acceleration-wise. Post Tek3 and de-cat downpipe, I can change up at 6,500 and still feel that I'm being mechanically sympathetic.

Suresh

JohnD

iTrader: (5)

Don't see the point of using all the revs just for the sake of it. OK, so I get a rush of blood every now and then just like anyone else but I honestly can't remember the last time I needed to use full throttle! Sounds like a waste of 270bhp but it feels good on the rare occasions when the red mist comes down!
Getting old like Moles dad?
John

chrisp

According to the dyno my max power is at 6640rpm, redline is at 7,500. I tend to chnage up at 5000-5500 as the short gearing in the lowe gears means about 0.1 of second later you are above 7000rpm.

STI MAN

5000 RPM, may as well have a Vectra....


I always forget where I set the red bleepy light thing, and find it almost every gear.


My mechanical sympathy lies with the 3 year Waranty, If you have 7.5K revs to play with, use them.

[Edited by STI MAN - 10/19/2002 1:45:31 PM]

Moles Dad

Well people I tried it last night on the way to the Kent meet....I had a Jap Sti behind me, and thats where he stayed !

Toby, I am really sorry that your car got 'shot blasted' on that bypass

It was a crisp cool night and using up to 6500rpm really did make all the difference, I do think that if we had kept on pushing the temps would have got the better of me...TD04 would have started cooking the inlet and the ecu would have 'pulled back'....good while it lasted though

"Dairy Milk Internals" LOL

Scott, doesnt go below 5k? Would think with all that weight you would need to stay above 5

Cheers all, young Moles Dad.