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Gear ratio's for the Bara straight cut box.

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Old 26-11-2007, 02:35 PM
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Martin-Hadland
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Default Gear ratio's for the Bara straight cut box.
Because of Dave's (YUM) high speed run it was realised that the Bara box might have a short 5th gear. I had been told that all the ratio's were standard, this is not the case.

I asked Bara for the tooth count on ALL the gears so that I could work it out myself. Here are the results:

1st 3.6
2nd 2.13
3rd 1.38
4th 1.00
5th 0.863

Alternative 5th gear is .812
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Old 26-11-2007, 02:40 PM
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.812 here l come


Just need my shaft now
 
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Old 26-11-2007, 02:53 PM
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awsome launch tho
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Old 26-11-2007, 02:59 PM
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Fair play for Martin for checking it all out properly.
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Old 26-11-2007, 03:49 PM
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So your not going to tell us the MPH per 1000rpm with your tyre size then with the old and the new ratio

Steve.
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Old 26-11-2007, 03:55 PM
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Default Re: Gear ratio's for the Bara straight cut box.
Originally Posted by martin-reyland
Because of Dave's (YUM) high speed run it was realised that the Bara box might have a short 5th gear. I had been told that all the ratio's were standard, this is not the case.

I asked Bara for the tooth count on ALL the gears so that I could work it out myself. Here are the results:

1st 3.6
2nd 2.13
3rd 1.38
4th 1.00
5th 0.863

Alternative 5th gear is .812
Thanks for confirming that Martin, its as I suspected on the day, so frustrating when it was assumed to be standard, Mark looked at me as if it was my problem that Dave was bouncing on the limiter. .
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Old 26-11-2007, 03:56 PM
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Originally Posted by cossie4i
So your not going to tell us the MPH per 1000rpm with your tyre size then with the old and the new ratio

Steve.
mph per 1000rpm is 7% higher on the new ratio .
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Old 26-11-2007, 04:00 PM
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according to my mafs it will do over 200mph, now go try it!
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Old 26-11-2007, 04:00 PM
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Originally Posted by MadRod
Originally Posted by cossie4i
So your not going to tell us the MPH per 1000rpm with your tyre size then with the old and the new ratio

Steve.
mph per 1000rpm is 7% higher on the new ratio .
Thats teaseing Rod

Steve.
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Old 26-11-2007, 04:01 PM
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are the other gear ratios different or is it just 5th gear.

why are they different?
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Old 26-11-2007, 04:03 PM
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Originally Posted by kitchy
according to my mafs it will do over 200mph, now go try it!
May be a tad short on Power, im a realist I guess 197/198 ish, but Dave will be out to prove me wrong.
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Old 26-11-2007, 04:04 PM
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Originally Posted by MadRod
Originally Posted by cossie4i
So your not going to tell us the MPH per 1000rpm with your tyre size then with the old and the new ratio

Steve.
mph per 1000rpm is 7% higher on the new ratio .
Does not mean that it will pull it though but I'm sure we will see in due course...
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Old 26-11-2007, 04:06 PM
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Originally Posted by martin-reyland
Originally Posted by MadRod
Originally Posted by cossie4i
So your not going to tell us the MPH per 1000rpm with your tyre size then with the old and the new ratio

Steve.
mph per 1000rpm is 7% higher on the new ratio .
Does not mean that it will pull it though but I'm sure we will see in due course...
Read the previous post Martin, like me you have been there a know it aint easy.
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Old 26-11-2007, 04:06 PM
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Originally Posted by MadRod
Originally Posted by kitchy
according to my mafs it will do over 200mph, now go try it!
May be a tad short on Power, im a realist I guess 197/198 ish, but Dave will be out to prove me wrong.
we will see, its not like i could actually do any calculations considering i dunno what top speed it did at the limiter with the old gear or what revs it was at
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Old 26-11-2007, 04:09 PM
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Assuming 225/40 x 18 tyres, 8010rpm would equal 203.4mph with the taller fifth .

With the taller fifth, he only needs to pull 7747rpm to do the speed that would make YUM the fastest non-nitros powered Cossie .
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Old 26-11-2007, 04:20 PM
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What is the fastest non nitros,d cossie top speed just now mike?
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Old 26-11-2007, 04:24 PM
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slightly bigger tyres then.

hope you do it Dave.
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Old 26-11-2007, 04:27 PM
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Originally Posted by Mike Rainbird
Assuming 225/40 x 18 tyres, 8010rpm would equal 203.4mph with the taller fifth .

With the taller fifth, he only needs to pull 7747rpm to do the speed that would make YUM the fastest non-nitros powered Cossie .
Mike I can now work out what Dave did at Brunters from the info now on this site, wont belong before others do it .
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Old 26-11-2007, 04:29 PM
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Originally Posted by carlo
What is the fastest non nitros,d cossie top speed just now mike?
Cossie is still Martin, Cossie Powered is some Scottish mate that we cant talk about yet.
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Old 26-11-2007, 04:32 PM
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See Rod's comment and watch out for the Top Speed issue of PF .
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Old 26-11-2007, 04:49 PM
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So YUM did 190mph @ the thrash
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Old 26-11-2007, 05:26 PM
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Old 26-11-2007, 05:41 PM
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i worked it out to 196.6, never was any good at maths
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Old 26-11-2007, 05:46 PM
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Originally Posted by MadRod
Originally Posted by carlo
What is the fastest non nitros,d cossie top speed just now mike?
Cossie is still Martin, Cossie Powered is some Scottish mate that we cant talk about yet.
What was martins speed tho? i know about the scottish cossie mate
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Old 26-11-2007, 05:48 PM
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Originally Posted by carlo
Originally Posted by MadRod
Originally Posted by carlo
What is the fastest non nitros,d cossie top speed just now mike?
Cossie is still Martin, Cossie Powered is some Scottish mate that we cant talk about yet.
What was martins speed tho? i know about the scottish cossie mate
194.7 was the top speed that my old car made, think that was in June 2003.
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Old 26-11-2007, 05:58 PM
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Originally Posted by martin-reyland
Originally Posted by carlo
Originally Posted by MadRod
Originally Posted by carlo
What is the fastest non nitros,d cossie top speed just now mike?
Cossie is still Martin, Cossie Powered is some Scottish mate that we cant talk about yet.
What was martins speed tho? i know about the scottish cossie mate
194.7 was the top speed that my old car made, think that was in June 2003.
.my pal has that gearbox........................fuckn noisey bastard it is..............(when the car works).he drives with earplugs in.............
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Old 26-11-2007, 06:09 PM
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Originally Posted by pete mcrash
Originally Posted by martin-reyland
Originally Posted by carlo
Originally Posted by MadRod
Originally Posted by carlo
What is the fastest non nitros,d cossie top speed just now mike?
Cossie is still Martin, Cossie Powered is some Scottish mate that we cant talk about yet.
What was martins speed tho? i know about the scottish cossie mate
194.7 was the top speed that my old car made, think that was in June 2003.
.my pal has that gearbox........................fuckn noisey bastard it is..............(when the car works).he drives with earplugs in.............
That box might be noisy but it did the business for me
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Old 26-11-2007, 06:18 PM
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i always thought 5th was different in mine...now i know why
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Old 26-11-2007, 06:18 PM
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i worked mine out to be 210 at 8200
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Old 26-11-2007, 06:25 PM
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Originally Posted by andrewg
i worked mine out to be 210 at 8200
What do you have? 0.80 ? Btw, well done!!
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Old 26-11-2007, 06:31 PM
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Originally Posted by martin-reyland
Originally Posted by andrewg
i worked mine out to be 210 at 8200
What do you have? 0.80 ? Btw, well done!!
yip
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Old 26-11-2007, 06:32 PM
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i'm sure the rolling radius of the tyres increase at that speed
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Old 26-11-2007, 06:33 PM
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Originally Posted by andrewg
i'm sure the rolling radius of the tyres increase at that speed
they will,but only a very small amount.
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Old 26-11-2007, 06:36 PM
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Originally Posted by Cosworth Rallyesport
Originally Posted by andrewg
i'm sure the rolling radius of the tyres increase at that speed
they will,but only a very small amount.
every little bit helps says the wee wumen that pished in the sea
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Old 26-11-2007, 06:46 PM
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Originally Posted by andrewg
i worked mine out to be 210 at 8200



Can you get it to pull 8200 in 5th then??
 
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Old 26-11-2007, 06:47 PM
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Originally Posted by andrewg
Originally Posted by Cosworth Rallyesport
Originally Posted by andrewg
i'm sure the rolling radius of the tyres increase at that speed
they will,but only a very small amount.
every little bit helps says the wee wumen that pished in the sea





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Old 26-11-2007, 06:49 PM
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Originally Posted by MAD YUM
Originally Posted by andrewg
i worked mine out to be 210 at 8200



Can you get it to pull 8200 in 5th then??
don't know miby find out next year

and its got 6 gears
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Old 26-11-2007, 06:50 PM
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Originally Posted by andrewg
Originally Posted by MAD YUM
Originally Posted by andrewg
i worked mine out to be 210 at 8200



Can you get it to pull 8200 in 5th then??
don't know miby find out next year

and its 6th
Solid lifter time then?
 
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Old 26-11-2007, 06:53 PM
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Originally Posted by MAD YUM
Originally Posted by andrewg
Originally Posted by MAD YUM
Originally Posted by andrewg
i worked mine out to be 210 at 8200



Can you get it to pull 8200 in 5th then??
don't know miby find out next year

and its 6th
Solid lifter time then?

cause mine is a race spec engine it has solid lifters and it loves reving
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Old 26-11-2007, 07:04 PM
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New shafts on order so roll on 6 weeks



Give me time to make up breather for front diff
 
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