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Old 30th Jun 2009, 08:44   #61
Steve JL
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You can still buy a Megablade now, with the option of having it factory built .

Poor use of the quote function on my part I admit.
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Old 30th Jun 2009, 17:13   #62
The_Dark_Side
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Quote:
Originally Posted by Zip View Post
My truck revs to 2300rpm
A 2300 rpm redline???


consistantly a **** since May 26 2005 18:58 ;-)
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Old 30th Jun 2009, 17:37   #63
miniyazz
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But the torque is through the roof, passed escape velocity, and is currently sitting somewhere between the moon and heaven

Huawei Mate 8
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Old 30th Jun 2009, 17:40   #64
Muffin`
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Quote:
Originally Posted by The_Dark_Side View Post
A 2300 rpm redline???
He drives a giant dump truck i think


'96 DC2, '05 GSF 650, C4 Cactus
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Old 30th Jun 2009, 17:43   #65
The_Dark_Side
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Quote:
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He drives a giant dump truck i think
I've driven (and when I say driven, I mean I spent about ten minutes behind the wheel and moved it about 100 feet) a Cat triple seven. I think they were the biggest in the world but there may be bigger ones now.


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Old 30th Jun 2009, 17:46   #66
Muffin`
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Did you dump the clutch and shout 'POWAAAAAA'?


'96 DC2, '05 GSF 650, C4 Cactus
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Old 30th Jun 2009, 17:49   #67
The_Dark_Side
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Quote:
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Did you dump the clutch and shout 'POWAAAAAA'?
LOL.
A hell of a toy.
One of the things I remember about it is the fuel consumption isn't MPG, it's GPH (gallons per hour).


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Old 30th Jun 2009, 17:54   #68
bledd
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this guy revving his ITR at around 11k, can't be doing the engine any favours..


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Old 30th Jun 2009, 17:56   #69
The_Dark_Side
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Quote:
Originally Posted by Steve JL View Post
Unfortunately my friend I think you are a little confused

Gratuitous pimping of my Megabusa

Purchased April 08 registered April 09



There is a thread on here about it
I like that a LOT!


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Old 30th Jun 2009, 18:18   #70
Elfmeister.
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Well My RX-8 bleeps at me when I hit 8.5/9, but the things still slugish, too heavy but hey this is abouts revs and its nice seeing double figures on the dash even if it doesn't do it.

6600K @ 4.8Ghz /ASUS MAXIMUS VIII HERO /EVGA 980Ti SC ACX/ 16GB CORSAIR Vengeance LPX 3200Mhz /3 x 250GB SSD/Corsair TX850
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Old 30th Jun 2009, 18:27   #71
Dogbreath
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Caterham RST-V8. Limited to 10,250 RPM in road spec, 12,500 RPM in race spec. Not a bike engine as such, though it does use Yamaha cylinder heads.
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Old 30th Jun 2009, 18:29   #72
The_Dark_Side
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Quote:
Originally Posted by Dogbreath View Post
Caterham RST-V8. Limited to 10,250 RPM in road spec, 12,500 RPM in race spec. Not a bike engine as such, though it does use Yamaha cylinder heads.
Can you remember the thread in here ages ago about some company that was making block/crank assemblies that allowed you to cannibalise 2 bike engines to make an ultra light and small capacity V8?
The demo engines reved well over 10k IIRC.


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Old 30th Jun 2009, 18:40   #73
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The RST started out as two Yamaha EXUP engines, but is now a bespoke bottom end, and they are supposedly developing a bespoke cylinder head for it as well.

Cyclone Power Ltd produce (or at least used to,their web site is dead) the Y40R, a V8 based on two YZF1000 EXUP.

Powertech Engineering make the RPA V8, which is based on two Hayabusa engines.

I don't recall any manufacturer making a kit to allow you to assemble you own engine though.
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Old 30th Jun 2009, 18:44   #74
The_Dark_Side
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Quote:
Originally Posted by Dogbreath View Post
I don't recall any manufacturer making a kit to allow you to assemble you own engine though.
I've searched for the thread before and can't find it.
It was something like a 250bhp 2 litre V8 which you could either buy complete or buy the unique parts and build your own.
Bah.


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Old 1st Jul 2009, 08:11   #75
TomO
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Originally Posted by Spawn View Post
My brothers 2008 M3 convertible, tuned to 360bhp with a full ceramic exhaust revved to around 8500 if im not mistaken...im pretty sure we hit the limiter on more than one ocassion while he was making me crap my shorts last summer while visiting him in Canada.

A 2008 would be the latest version E93, with 414bhp as standard

redline on the E90/E92/E93 M3 is 8400rpm and the M5 was 8250rpm as previously mentioned.

There surely has to be some ferrari engines that rev really high?


managed to get my old S14a 200sx up to about 11000rpm once. was coming on to motorway down the slip road through the gears, just about to touch the limiter in 3rd, so went for fourth, but got second! It went in fine but then i got the almighty noise from the engine and quickly realised what i had done and ripped it out of gear! drove carefully for the rest of the journey but had no problems at all afterwards.

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Old 1st Jul 2009, 08:22   #76
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Yep, if we're talking about all road production cars, most Ferraris and Lambos rev (well, redline) to 8500rpm

My Tamiya Subaru is in production and is a road car That revs to 18k rpm

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Old 1st Jul 2009, 08:23   #77
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Quote:
Originally Posted by TomO View Post
A 2008 would be the latest version E93, with 414bhp as standard

redline on the E90/E92/E93 M3 is 8400rpm and the M5 was 8250rpm as previously mentioned.

There surely has to be some ferrari engines that rev really high?


managed to get my old S14a 200sx up to about 11000rpm once. was coming on to motorway down the slip road through the gears, just about to touch the limiter in 3rd, so went for fourth, but got second! It went in fine but then i got the almighty noise from the engine and quickly realised what i had done and ripped it out of gear! drove carefully for the rest of the journey but had no problems at all afterwards.

The V8 in the 430 redlines at 8.5k, not REALLY that amazing anymore considering the M3's can hit 8500. Not sure about the V12 in the 599 or Enzo, I would have thought it can't be much higher than 9k?

Need a pic of my car
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Old 1st Jul 2009, 08:27   #78
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On another note...am I seeing this right?



Veyron redlines at 6.5k? I know it has 4 Turbo's but how the hell do you produce 1000 horse power without the extra 2k in revs that most performance cars squeeze out? That's where horsepower comes from?!?

Need a pic of my car
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Old 1st Jul 2009, 08:33   #79
Django x2
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Quote:
Originally Posted by Rhyzz View Post
On another note...am I seeing this right?



Veyron redlines at 6.5k? I know it has 4 Turbo's but how the hell do you produce 1000 horse power without the extra 2k in revs that most performance cars squeeze out? That's where horsepower comes from?!?
Not with FI it doesn't. Turbos are useless past a certain RPM as they cant spin fast enough and "puff out".

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Old 1st Jul 2009, 08:44   #80
Matt82
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bugger... that speedo goes up to 280 :S
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Old 1st Jul 2009, 09:42   #81
Rhyzz
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Quote:
Originally Posted by Lucero View Post
Not with FI it doesn't. Turbos are useless past a certain RPM as they cant spin fast enough and "puff out".
True, although I was always under the impression that this was the reason Diesels never gave terribly accurate BHP figures, because they can't rev high enough? Is that right or have I been living a lie?

Need a pic of my car
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Old 1st Jul 2009, 09:47   #82
Dogbreath
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Quote:
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True, although I was always under the impression that this was the reason Diesels never gave terribly accurate BHP figures, because they can't rev high enough? Is that right or have I been living a lie?
Not quite sure what you mean by giving accurate BHP figures; do you mean the manufacturers stated power is often optimistic or that it's difficult to measure the power because of the limited RPM range? If the former, then that's just down to manufacturers artistic licence (lying scumbags!), but power is no more difficult to measure simply because the engine runs out of puff at ~4500RPM.
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Old 1st Jul 2009, 09:59   #83
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Not with FI it doesn't. Turbos are useless past a certain RPM as they cant spin fast enough and "puff out".
Thats not really true.

Turbo speed is not linked to engine rpm its governed by the gas flow against the turbine housing and wheel size.

For anything that would remain efficient at that sort of gas flow both in terms of turbvine inlet pressure and compressor adiabatic efficiency would give a very high boost threshold and not a particularly torquey low rpm range.

Its all about sizing to get what you want and no OEM really wants a turbo with a peaky power delivery. My Turbo Honda revved fine to 8400rpm.

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Old 1st Jul 2009, 14:45   #84
Rhyzz
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I must say my VX220 is definately perkier past 5,000 rpm but I was also under the impression that Turbo's were for midrang torque and not the upper range - the vRS was diabolical past 5,000rpm but between 2k and 5k it was immense...remap for you I suppose.

I just remember being told at an early age that Diesels will never produce high bhp figures because they can't rev as high as petrol cars, but the torque increase more than makes up for it...?!

Need a pic of my car
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Old 1st Jul 2009, 15:02   #85
kaiowas
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Quote:
Originally Posted by Rhyzz View Post
I just remember being told at an early age that Diesels will never produce high bhp figures because they can't rev as high as petrol cars, but the torque increase more than makes up for it...?!
The key thing to remember is that at any given speed power = torque * rpm

Therefore there are 2 ways to get power, either high revs or high torque. In a diesel engine the combustion event happens so slowly that the short time available for combustion to occur becomes the factor which limits engine speed. In contrast petrol burns very quickly and so engine speed is generally limited by either the volume of air which can be fed to the combustion chamber or by the mechanical limitations of the conrods/valvetrain etc.


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Old 1st Jul 2009, 17:35   #86
Alibaba99
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Originally Posted by Lucero View Post
Not with FI it doesn't. Turbos are useless past a certain RPM as they cant spin fast enough and "puff out".
So how do you explain the 12000rpm capable turbo F1 cars?

Classic Impreza STis and the R32/33/34 Skylines had turbos and 8000rpm red lines.

If you want topend power at high rpm then the turbo just needs to be sized correctly to allow this without choking.
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Old 2nd Jul 2009, 07:25   #87
Zip
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Originally Posted by Muffin` View Post
He drives a giant dump truck i think
More of a Small dump truck.

Mine is 35 ton unloaded and 70 ton loaded.

The one hes talking of would probably be around 500 ton

And there is no clutch pedal if its like mine. you have the gears you select but no clutch. Bloody jerky thing in my truck =/

I had a the arse slidding out with full lock of the steering in the mud the other day in it

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Old 2nd Jul 2009, 09:43   #88
Bear
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Quote:
Originally Posted by Lucero View Post
Not with FI it doesn't. Turbos are useless past a certain RPM as they cant spin fast enough and "puff out".
That depends on how well matched the turbo is to your level of tune. With the correct turbo and cams and good mapping its quite easy to have a reasonably quick spooling car that pulls all the way to the red line (7500rpm)
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Old 2nd Jul 2009, 11:21   #89
jpmonkey69
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Honda NSX? Only 8k...

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Old 2nd Jul 2009, 11:24   #90
Will Gill
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suzuki capuchino? (sp)

seem to remember driving that and laughing at its crazy engine (and power that was halved by turning the aircon on!)

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