Cole
Member
Registered: 11th Nov 02
Location: eastbourne Drives:zafira sold now a qashqai
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my god a decent convo very interesting
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Cybermonkey
Member
Registered: 22nd Sep 02
Location: Sydney, Australia
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of course Cole. The power band ends below 6kRPM though Daimo, and you are not gaining anything on a standard engine by revving the nuts off it. Much better to change at about 5000-5500 rpm
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Richie
Member
Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
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up for vibs to respond 
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l33t corsa
Member
Registered: 14th Aug 01
User status: Offline
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quote:
Originally posted by Cybermonkey24
of course Cole. The power band ends below 6kRPM though Daimo, and you are not gaining anything on a standard engine by revving the nuts off it. Much better to change at about 5000-5500 rpm
You have the advantage of keeping it a lower gear. You'd need to work out thrust figures or whatever they're called to see when it was best to change gear. More than likely there is an advantage to holding a lower gear longer. They have the graphs in some bike magazines if you don't know what I'm on about. 
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Adam
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Registered: 1st May 01
Location: Hurstbourne Tarrant
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that'll be peak bhp at 5500, peak torque should be lover thyan that about the 3-4k mark
[Edited on 20-10-2003 by Adam]
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vibrio
Banned
Registered: 28th Feb 01
Location: POAH
User status: Offline
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a cars topspeed is dependant on power,the gear ratios and weight amounst other things etc etc.
my car's (standard) topspeed is 124mph but that is not at the rev limit in 5th gear. I now have a limit of 7200 which if I had the power the car would do 163mph on the limiter. if the car has been modified a lot and has huge increase in power then it would be possible to hit the limiter in top gear ( I did this in my sporting) so yes in situation a raised limiter would increase the top speed. however most cars never get to that stage of tunning.
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Andy
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Registered: 28th Dec 99
Location: Cumbria, UK
User status: Offline
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You should change gear at peak power rpm (or slightly over), not at peak torque. Although you may have more engine torque slightly lower down the rev range, don't forget that gearing at high revs can convert a slightly lower engine torque figure into more torque at the wheels. This is most effective at around peak bhp rpm. The same is true of reaching top speed (assuming your rev limiter is set high enough so it won't cut in in top gear) You really need to look at a power/torque curve to decide the best place to change gear for max acceleration
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Kris TD
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Registered: 25th Mar 02
Location: Ware, Hertfordshire
User status: Offline
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quote:
Originally posted by Cybermonkey24
of course Cole. The power band ends below 6kRPM though Daimo, and you are not gaining anything on a standard engine by revving the nuts off it. Much better to change at about 5000-5500 rpm
wont the 1.6 have a lower peak power than daimos old 1.4 anyway?
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Marc
Member
Registered: 11th Aug 02
Location: York
User status: Offline
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i always change gear slightly over peak power (as andy sez) so when im changin im not losin potential power.
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Daimo B
Member
Registered: 20th Mar 00
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Same as. Wity my current engine i change at 6500rpm. It pulls all the way up from about 3k, but i can hear and feel the engine struggling after 6500rpm so change.
Another reason as to why i want to get my car on the rollers.
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stuyw
Member
Registered: 15th May 02
Location: North West Drives: Rev3 MR2 Turbo
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u get more than 130 mph with a F15 m8
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Daimo B
Member
Registered: 20th Mar 00
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Noo, we were saying about 130mph @ 6500rpm on a standard F15 box.
I've got an F20. Much better box than my F13 was.
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stuyw
Member
Registered: 15th May 02
Location: North West Drives: Rev3 MR2 Turbo
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ah sorry m8, read it wrong  
i had an F20 with my engine, but swapped it for the F16 instead
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Daimo B
Member
Registered: 20th Mar 00
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Fads just done that too.
Im not too arsed tbh. My cars as quick as it is, and at the mo, i've no intention to make it any faster (yet). Wanna make it look pretty and shiny before that.
Plus all engine mods are always bloody expensive  I've got coilovers to save for first 
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Sooty
Banned
Registered: 9th Mar 03
Location: FLAP CENTRAL
User status: Offline
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quote:
Originally posted by Daimo B
Wanna make it look pretty and shiny before that.
you getting a new car? j/k could'nt resist
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vibrio
Banned
Registered: 28th Feb 01
Location: POAH
User status: Offline
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