alanr
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| posted on 14/9/06 at 10:50 AM |
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calling all bike engined cars
I'm interested to know what speed/1000revs you all are doing (in 6th) - my Blade is doing just under 11mph/1000 which at red line theoretically
would do 118 (not that I have ever done that on a public road !!)
This is no great problem but does mean at 80ish I'm doing about 7500rpm
Is there a way of easily changing the 6th gear to create a cruise gear (and make it go faster) and just use the other 5 for playing
A
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smart51
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| posted on 14/9/06 at 11:03 AM |
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mine does 10.2 MPH per 1000 revs in 6th. Fitting a lower number diff, eg 3.14, will increase the gearing in all gears, reducing the revs at any give
speed. It slows you down in lower gears though. Bigger wheels and tyres have the same effect.
It might be possible to strip down your gearbox, remove the cogs for 6th and replace them with ones of a different ratio, if such things exist and
will fit.
Failing that, some sort of over drive unit after the gear box, or a 2 speed diff or 2 range transfer box would do it.
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ReMan
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| posted on 14/9/06 at 12:19 PM |
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Hi, Mine is exactly the same.
I guess you have a 3.62 rear end as I have and 15" wheels
I think you either have to accept that you have a BEC and that 7500 RPM is roughly 2/3 of peak revs, so no big deal any more than a CEC at 4500 is 2/3
peak.
Or you go for a different rear. I am looking at replacing mine for a 3.38, I am quite happy with the clutch actiojn on mine and am confident I will
still be able to pull off, but will drop the revs at 70mph to about 6500 and will be able to get closer to 60mph in 1st (about 55 I think).
a 3.14 rear would get you down to about 5700 rpm and cost an arm and a leg and a kidney!
CEC next then 
Col
www.plusnine.co.uk
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alanr
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| posted on 14/9/06 at 01:17 PM |
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You're right, mines a 3.62 and shod with 195/50 x 15's same as yours
I'm very happy with the set up and don't want to change the rear as it would affect the acceleration (the bit I love)
But is there something on the market that could be a bit like an overdrive that would reduce revs when not needed
A
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G.Man
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| posted on 14/9/06 at 01:50 PM |
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http://www.allensperformance.co.uk/gearboxes-and-couplings.htm
step up reverse box
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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Kev99
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| posted on 14/9/06 at 02:45 PM |
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Hi I am running a 3:38 diff about 128mph top end and about 6700 revs at 70
I believe this is the best option all around as I haven't lost hardly any of the acceleration and its not revving to high cruising at 70 to 80
ish
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DIY Si
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| posted on 14/9/06 at 04:27 PM |
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Same as above, 3.38 diff and 15's. Roughly 6,700 rpm at 70.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Hellfire
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| posted on 14/9/06 at 06:02 PM |
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Ours has a top speed of 128'ish due to lower output ratio. Using 3.62 diff and 15" wheels... a 3.38 would be better but they're not
typically LS.
Steve
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erwe
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| posted on 14/9/06 at 07:28 PM |
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40 miles at 4000 rpm.
3.36 LSD from scorpio and 17 " wheels
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timmyb
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| posted on 14/9/06 at 09:26 PM |
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I'm running a 3.14 diff on my R1 engined car and it's sitting at approx 6800 at 70mph.
Tim
MK Indy R1
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ChrisGamlin
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| posted on 14/9/06 at 10:04 PM |
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Thats a 2004 engine though isnt it Timmy? With a 3.14 in a pre 2004 engine like most use you'd be doing nearer 80mph on 185/60-13"
tyres.
Alan, FWIW if your blade is geared for 11mph/1000rpm then it will top out at nearly 130mph not 118mph, as the red line is 11750rpm on the carbed
engines, and presumably at least that on later engines.
cheers
Chris
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alanr
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| posted on 15/9/06 at 07:43 AM |
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mines a '97 Blade and max output is at 10750 Chris - that gave me the 118 figure - you're right though, it probably will go a bit higher
(cut out is at 12200)
A
ps thanks for all the feed back guys - very interesting
[Edited on 15/9/06 by alanr]
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ChrisGamlin
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| posted on 15/9/06 at 05:08 PM |
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The rev limiter should be at 11750 unless its been modded to go higher, and in my experience it will happily pull to the limiter in top 
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bigrich
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| posted on 15/9/06 at 05:17 PM |
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mines a 3.62 diff and 98 blade motor seen 122mph at 11500 ( on my testtrack). 70 is about 6600rpm
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