broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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Mate of mine has a 4.36 in his 1.6 nova, makes a massive difference of acceleration, however i think hes crossing the line on the 1/4 mile changing into 5th? just shows how short it is. id say a 4.18 would be your best bet
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Steve X16XE
Member
Registered: 31st Dec 06
Location: Barnsley, South Yorkshire
User status: Offline
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Cheers for you help guys 
How easy is it to get a 4.18 from a F10 box? What Vauxhall's had that box?
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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i have 2 4.18 cwp's in my garage............
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ed
Member
Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by Robin
Dog box is different from a dogleg box I think.
It's something to do with the engagement of the gears rather than the shift pattern.
It's to do with the synchromesh, or lack of, or something 
You have gears that spin on bearings, when the gears need to be engaged a 'dog' is pushed into the gear, the dog is locked onto the shaft and locks the cog onto the shaft giving you output from that gear 
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ed
Member
Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by JM_16v
quote:
Originally posted by Dom
dog box's (used on motorbikes) don't have a synchromesh (i think), thus the casing can be smaller and it's easier to change ratios etc Though you get a lot of transmission noise, crunchy gears etc
think thats right
double cluttching time with no synchromesh 
Or clutchless gear shifts.
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Superlite Ltd.
Member
Registered: 9th Jan 07
User status: Offline
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quote:
Originally posted by Dave A
see my tutorial about final drives steve.
its a 4.18 one you want, from an f10.
that is a good tutorial
Gave a print out to a friend who was building his nova rally car 1.4
...and it was faster than when it had the 1.6 in it
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ainsley_brader
Member
Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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quote:
Originally posted by Ian
Read that link, the main difference is that the teeth are straight-cut for strength.
Not really true at all!
You can have a straight cut synchromesh box
or a helical cut dog box
dog box refers to the lack of synchromesh and nothing to do with the teeth!
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ainsley_brader
Member
Registered: 24th Mar 02
Location: Tattershall, Lincolnshire
User status: Offline
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quote:
Originally posted by ed
You have gears that spin on bearings, when the gears need to be engaged a 'dog' is pushed into the gear, the dog is locked onto the shaft and locks the cog onto the shaft giving you output from that gear
Yes you have gears that spin on bearing, but then you went slightly wrong
For each pair of gears 1/2 3/4 5/R you also have 3 synchromeshs. So you have two shafts one with 6 fixed gears and 1 with 6 floating gears and 3 fixed synchro hubs.
When the gears need to be engaged a selector fork moves the outer part of the synchromesh onto the dog teeth of the gear thus locking the synchro hub to the gear and therefore locking the gear to the shaft!
Hence 6 fixed gears driving 5 floating gears 3 fixed synchros and 1 fixed gear!
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