Top end speed

[100ps_drw_hicube]

It's not the wheel size it's the tyre size that matters! My 15's with the big tyres fill more of the arch than the 17 with low profile tyres!

right ok so 19's could be possible with a lower profile tyre ?

this is what i am thinking http://www.german-wheels.com/produkte/d ... eces=3-tlg

[rover]

ive got some weird " stunner torneo" tyres on mine 225/60/16

Theres nothing weird about stunner tyres, they are without doubt the best value tyre on the road! Italian design and build, superb in the wet or dry, if I could get commercial stunner I would have them on my van..


If you want to know what size tyres will make a difference to your van have a play around with this.. http://www.miata.net/garage/tirecalc.html

By altering the profile of the tyre you can gain a fair amount of top end(as MrMPuK says).


Rover.

[WINDSCREENGUY]

they are nearly commercial they have a load rating of 102 which is the same as some commercial tyres

[100ps_drw_hicube]

they are nearly commercial they have a load rating of 102 which is the same as some commercial tyres

when are we gonna see some pics of this van of yours

[sidspop]

do you know what jag it came off there are a big jag breakers about 5 roads away from me

I'll dig it out, you know what it's like with magazines,you can remember the article, not which issue it's in!

[stevew]

I have a magazine article with an Escort Mk1, 4.5 litre rover, and a generous dollop of laughing gas. He uses an o/d box off a Jag, hung on angle iron crossmember, and handles about 400 bhp no problem. His biggest problem was the length under car, and angles of UJs. That obviously wouldn't be a problem in a tranny.
Gearbox to o/d input adaptor made to suit, propshaft about £120.
Voila 10 effective gears, and better economy
Any good?

Yes exactly what I had in mind.
Only problem I can see (other than the actual mechanics of fitting it ) is that the speedo would be out.
Steve

[Valsheda]

You could always try bigger tyres! You don't have to go for bigger wheels! I'm running 225\70r15!

will get a qoute for some bigger tyres and see at the mo i am getting kuhmo for £28 each and the 16" kumho i can get for £33 so if its near that mark i will go the tyre route if not i will try the 16" rims. anyone know where to go to get the speedo recalibrated after something like this as it will be a fair bit out

225/70 r15 thats what single wheel hi cubes run on bet it handles well

Mate i have 16" rims on mine and now fitted with 215 65 16 continental vancos , anything bigger you will have to put a very low profile tyre on , its the width of the wheel arch that may be the prob have a look at the pic

[Gunslinger]

Only problem I can see (other than the actual mechanics of fitting it ) is that the speedo would be out.
Steve

depends how good/tidy you want it, but one option is to make new a gauge label for the speedo, leaving the original mph markings that are correct in the right place, but remove the kph markings and then stick it on a rolling road and re-mark the kph side of the gauge as "o/d mph" and mark it up at suitable points whilst on the rolling road

[bazw]

for a jag od box you need to look for series 1 and 2 xj6 or daimler sov (maybe the 420g as well )
i had 1 on a daimler series 2 from 1973 ish , it was about the last year i have seen 1 on ,they will take the power but they are a pig to get bits for as they are a moss box the laycock OD bit just bolts on to the back end so if you get 1 with a bit of work it will go onto any box

[Terry]

You could get a new 'face' for the speedo,
and 're-calibrate' by using a gps. !
Frinstance I have a 'road angel' and the speed is shown
on that , all you have to do is make a new speedo face
with the revised speeds on (obtained from the GPS),
then fit it over the old speedo face.

[Luke]

you can get reduction boxes that fit in the speedo line - my mate who is building a kit car - apparantly the speedo needs to be correct for the SVA, sent me a link but ive lost it!!

[Valsheda]

ive lost it!!

People have been telling me that for years mate , yer not alone

[bazw]

anyone who wants an od from a jag look @

http://cgi.ebay.co.uk/Jaguar-V12-manual ... otohosting

[stevew]

Woh, not at that price!
I could do a lot of miles on £350 worth of diesel.
Steve

[sidspop]

Sorry gents I stilll have not located the article.
Speedo recalibration====why not just go for an early morning drive with a mate (you do have one I presume?) in another car, and using mobiles or cb or something, make a not for every 10 mph his speedo to what yours reads.
Then, get on the pc. mess about on 'paintbrush' to give you the circle, and work out where each 10 mph is on yours. Print a copy, remove your speedo and then needle, and glue your new calibrated one on.
Voila you just saved about a oner, your mate thinks you're clever, and you can clean the dust out and change bulbs in the speedo at the same time. Easy peasy