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Supercharged K20a2 Vtec - Race Spec


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#256 Saxo-Fiesta-Mini

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Posted 05 September 2009 - 08:21 PM

awesome great work :kiss:

#257 sotiris

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Posted 05 September 2009 - 08:49 PM

perfect ...!!!

#258 Gingerjoe

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Posted 14 September 2009 - 01:40 PM

I want it! :o:(:teehee:

#259 cptkirk

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Posted 14 September 2009 - 03:28 PM

awesome great work :o

perfect ...!!!


Cheers Guys


I want it! :teehee::(:)


Well you cant have it - neh neh........

#260 brandon7

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Posted 15 September 2009 - 09:09 PM

This is the Muts nuts! Great Job on so many levels. That trailer is gonna be sweet to

Are you prepared for how Fuc*king unbelivably quick this mosnter is going to be!!!!? Lets see you drive this sucker!

#261 cptkirk

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Posted 16 September 2009 - 09:14 AM

This is the Muts nuts! Great Job on so many levels. That trailer is gonna be sweet to

Are you prepared for how Fuc*king unbelivably quick this mosnter is going to be!!!!? Lets see you drive this sucker!


Hey Mark

Really struggling with motivation at the minute, will be better once I get the engine sorted. Trailer will be ready to collect on the 26th Sep - Woo Hoo, then its get the car loaded and off to get the engine sorted, then off to get brakes bled out properly as their not right (got a mate with the new sucking out type bleeder, so gonna give that a go).

On the note of brakes, I have had to weld the bottom UJ to the hex shaft as the bolt that clamped the arrangement together kept getting in the way of the brake pedal, even to the point of getting caught under it at one point while trying to get it off a trailer. Far from ideal but sorted now.

Then I am getting the doors hung and the door workings put back together by the guys at Minis-R-Us (Twyford) which is about the closest mini specialist to me. One of the problems with buying doors with all the bits in a box, you have no idea where it all goes and what screw/bolt does what, so therefore I am going to save myself the headache and get someone that knows what they are doing to finish it off for me. If I had taken them apart I would have no quarms in putting them back together. I am now at a point where I just want it finished and this way it will save time.


Am I prepared for how fast it gonna be??? - Honestly, probably not.....but I have a healthy respect for it, not a nonchanlant view of it, I know that it will bite me in the ass if I dont give it the respect it deserves, it is also a beast that needs taming and to that end I intend to hone my driving skills to enable me to do so - even if that means getting specialist tuition that will then allow me to get the maximum from the car. It will handle very differently to pretty much everything else I have driven, other than my old 250cc kart, so I dont mind holding my hand up and saying that I might need to go back to school for this one.....

The geek in me recently made me do a spreadsheet comparing the mini against other cars available on the current market, I think it makes for interesting reading, if you like that sort of thing. Note only the values in red are greater than the mini.

Attached File  BHP_per_Tonne___Zcars_Supercharged_VTEC_Mini___V___Others.doc   76.5K   218 downloads

#262 De Blerende Beetle

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Posted 16 September 2009 - 01:47 PM

You can only compare hp/tonne if the topspeed is also the same. The lower the topspeed the lower the ratio of the gears are and that means far more power.

#263 cptkirk

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Posted 16 September 2009 - 02:28 PM

You can only compare hp/tonne if the topspeed is also the same. The lower the topspeed the lower the ratio of the gears are and that means far more power.


Would you care to elaborate/put some proof to your statement?

How can lower gears give you "far more power"? Power where or from where?

Surely lower gearing gives you greater acceleration and has nothing to do with HP/Tonne as this is something completely different?

I am open for discussion.............

#264 *franky*

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Posted 16 September 2009 - 04:16 PM

You can only compare hp/tonne if the topspeed is also the same. The lower the topspeed the lower the ratio of the gears are and that means far more power.


Would you care to elaborate/put some proof to your statement?

How can lower gears give you "far more power"? Power where or from where?

Surely lower gearing gives you greater acceleration and has nothing to do with HP/Tonne as this is something completely different?

I am open for discussion.............


thats right the engine gives you the hp realy got nothing to do withe the gearing in the box. :thumbsup:

#265 Jobu

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Posted 16 September 2009 - 04:48 PM

Click

Read that and all will become clear. I think what De Blerende Beetle is getting at is because you have smaller wheels than what the engine originaly came out of has you have effetively increased the torque. (Which is the basically the same as fitting lower final drive e.g 4.7 rather than 4.4)

Same as if you fitted a taller final drive you would decrease torque. e.g fitted a 4.0 final drive rather than 4.4.

So your not making no more engine torque but the time its goes through the gearbox to the wheels you effectively are making more than standard.

Think thats basically how it works, i found but link a few months ago but it explains things well i think.

#266 cptkirk

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Posted 16 September 2009 - 08:47 PM

You can only compare hp/tonne if the topspeed is also the same. The lower the topspeed the lower the ratio of the gears are and that means far more power.


Would you care to elaborate/put some proof to your statement?

How can lower gears give you "far more power"? Power where or from where?

Surely lower gearing gives you greater acceleration and has nothing to do with HP/Tonne as this is something completely different?

I am open for discussion.............


thats right the engine gives you the hp realy got nothing to do withe the gearing in the box. :thumbsup:


As below I understand and have done for some time that when changing the final drive it allows more torque to the wheels (in the case of fitting a lower FD).

As power = torque x rpm then theoretically yes it would put more power to the road (it was power beetle guy was making reference to). However there are many factors that come into play, not just appliable power, theres torque, rpm, aerodynamics and gearing to consider when it comes to comparing various cars. As power to weight ratio is about the best 'wet finger in the air' way of comparing cars I thought it would be an idea to show the comparisons. I didnt think it would get the response it did.

Click

Read that and all will become clear. I think what De Blerende Beetle is getting at is because you have smaller wheels than what the engine originaly came out of has you have effetively increased the torque. (Which is the basically the same as fitting lower final drive e.g 4.7 rather than 4.4)

Same as if you fitted a taller final drive you would decrease torque. e.g fitted a 4.0 final drive rather than 4.4.

So your not making no more engine torque but the time its goes through the gearbox to the wheels you effectively are making more than standard.

Think thats basically how it works, i found but link a few months ago but it explains things well i think.


Yer I understand about the torque multiplier (good link by the way), I just thought it a flipant comment, to dismiss power to weight ratio's because the cars dont have the same top speed, without backing up the statement. Therefore if we read the statement correctly we are to dismiss all power to weight comparisons because the cars dont have the same top speed, that would then render pretty much all power to weights useless as I am pretty sure most cars dont have the same top speed. You could have two vehicles with the same engine, gearbox, wheel/tyres and weighing the same but if one is shaped like a house brick then they are not going to get the same top speed but the power to weight is the same and there is no change to gearing. If the topspeed is lower it doesnt always mean that the gearing is different and doesnt mean more power, sorry but IMO it was a sweeping statement that didnt have much substance.

For everyones information I have changed my final drive (taller - exact ratio figures I have not been able to get out of Z's - Chris/Richard if your reading maybe you can shed some light on that) to allow me to use all 6 gears, plus the profile of the tyres I am using (205/60 R13) are bigger than the regular 45's used on these cars so if anything it is higher geared than a civic, with the torque to pull it to a yet unknown top speed, I think aerodymanics (lack of) will come into play before I can reach the redline in top gear.

The power to weight ratio debate will rage long and hard and has done on many other forums, rather than make my build diary into one of them, I think we can leave it there.

>_<

Edited by cptkirk, 16 September 2009 - 09:00 PM.


#267 e11evns

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Posted 17 September 2009 - 06:07 PM

im with you on that andy, and oh just got my car dyno'd today!!!!!!!!!!! 453 at the crank which by your calcs gives me 604bhp per tonne!! who needs a veyron!

#268 cptkirk

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Posted 17 September 2009 - 10:09 PM

im with you on that andy, and oh just got my car dyno'd today!!!!!!!!!!! 453 at the crank which by your calcs gives me 604bhp per tonne!! who needs a veyron!


Holy poo - that is going to be truly awesome, and I thought mine was going to be fast, good luck with it, let me know how it drives and please get some footage up on you tube.

#269 e11evns

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Posted 18 September 2009 - 10:17 AM

It will make its first appearance at combe next sat, cant wait! friend is gonna lend me a camera to bolt to the cage for a bit of in car action! engine bay is looking fierce at the mo i'll post a pic.

#270 cptkirk

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Posted 18 September 2009 - 02:19 PM

E11evens I notice your in wiltshire, are you going to be taking yours up Gurston Down? I am not too far away in West Sussex, I will have to take a drive over one day when I get mine done and have a butchers at your setup. I cant make Combe so instead I will be beavering away trying to get everything together to allow me to go get the engine sorted. Hope all goes well, I can imagine that will be pretty much the fastest thing there or probably the fastest thing in a 100mile radius. Looking forward to the footage.




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