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Engine/Gearbox questions and discussion
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JayJay
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Post by JayJay » Wed Feb 01, 2012 10:43 am

Want me to test anything? :P
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littlefeller
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Post by littlefeller » Wed Feb 01, 2012 10:26 pm

yeh you could do (dont blow your motor though :twisted: ), what box are you using? what tyre size? vtec crossover and max shift point? :D :D :D

cant remember now, but i think maybe vtecmecs gearbox is the one rob had mentioned on puk a few days ago, not been back on there to check, but if so then the final drive is different than in the ratios list, will do it again with the other fd and see what difference it makes :D

ran it with the 4.062 fd, not much better, still drops out of vtec :? :? unless the clutch is slipping maybe :idea: (or wheel spin :twisted: )
Last edited by littlefeller on Wed Feb 01, 2012 10:53 pm, edited 2 times in total.

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littlefeller
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Post by littlefeller » Wed Feb 01, 2012 10:45 pm

ok can some one check at what speed your doing when vtec kick in, in 2nd, which box you have and tyre size.
i have already done this with my auto and it is as per my list of ratios, i loose vtec in all gears momentarly after shifting, but i havnt driven the manual. jayjay does yours stay in vtec between shifs or does it drop out of vtec? :?

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A1ex
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Post by A1ex » Wed Feb 01, 2012 11:38 pm

I have the m2v5 box in mine and it stays in vtec between shifts. I'll take a look on the way to work for the rpm between 1st and 2nd.
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Edd
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Post by Edd » Wed Feb 01, 2012 11:39 pm

I can test mine for you too. But it'll be Friday probably
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Edd
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Post by Edd » Wed Feb 01, 2012 11:40 pm

Oh, wheel/tyre size wont make any difference as the vehicle speed sensor is on the gearbox ;)
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Ted
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Post by Ted » Thu Feb 02, 2012 12:52 am

i
Edd wrote:Oh, wheel/tyre size wont make any difference as the vehicle speed sensor is on the gearbox ;)
i think wheel size will matter as the speed sensor is progammed for a specific wheel size so if bigger/smaller rolling radius is being read it will feck it right up.

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Edd
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Post by Edd » Thu Feb 02, 2012 1:17 am

What I mean is, regardless of the tyre/wheels size, the speedo will still show the same speed in relation to the current rpm. Thus vtec crossover will be at the same indicated speed in the realitive gear.... Unless sat nav is your speedo :lol:
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A1ex
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Post by A1ex » Thu Feb 02, 2012 8:45 am

Had a go on the way to work this morning. 2nd tops out at around 68-70 mph, difficult to see without hitting the fuel cut or crashing!

On shift from 1st at 7800 rpm to 2nd it drops down to 5500 rpm.
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PAW rebuilt 01 ATR 238bhp & 164lb/ft sold
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lucas
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Post by lucas » Thu Feb 02, 2012 8:51 am

By a manual :lol:

Sorry man, i dont know anything about autos :/
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