Musings - Rear wheel/tyre choice and engine revs

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My gearing is much better since I fitted these, 4th is like 3rd. Must admit need more power now :lol: as having to change down on inclines (more so than usual)

DSCF4164.jpg
 
sparkywig said:
You need to be careful with increasing the fan speed, unless it's a welded and balanced fan as the stock ones come apart at sustained high revs.....
A very good point! Hence the £80 tig welded balanced fans at all good stockists of such things. :)

...and it won't cool the oil enough anyway so remote cooler, or adjust tin to fit a T4 cooler.

When will it all end? :lol: All I want is to potter about in a lowered bus with a big engine and just now and again hack along without it going bang!
 
ZedBed said:
sparkywig said:
You need to be careful with increasing the fan speed, unless it's a welded and balanced fan as the stock ones come apart at sustained high revs.....
A very good point! Hence the £80 tig welded balanced fans at all good stockists of such things. :)

...and it won't cool the oil enough anyway so remote cooler, or adjust tin to fit a T4 cooler.

When will it all end? :lol: All I want is to potter about in a lowered bus with a big engine and just now and again hack along without it going bang!


Stick to stock then......
 
thats the prob mod one thing and it leads to modding everything else,or keep it stock :msn4:











I dont do stock ;)
 
sparkywig said:
ZedBed said:
sparkywig said:
You need to be careful with increasing the fan speed, unless it's a welded and balanced fan as the stock ones come apart at sustained high revs.....
A very good point! Hence the £80 tig welded balanced fans at all good stockists of such things. :)

...and it won't cool the oil enough anyway so remote cooler, or adjust tin to fit a T4 cooler.

When will it all end? :lol: All I want is to potter about in a lowered bus with a big engine and just now and again hack along without it going bang!


Stick to stock then......
Knife edge descision for me - I love my stock single porter, but the money was burning a hole in my pocket and I wanted something to show for it before it disappeared into the abyss of everyday mundanity... :)

Yes, the SP is a very efficient thing (comparitively) I'm sure I was getting over 30mpg travelling at the real speeds you do. And it accelerates at low revs where a TP splutters and you have to go down a gear. I'd have one every time over a standard 1600TP.
 
sparkywig said:
67panel said:
thats the prob mod one thing and it leads to modding everything else,or keep it stock :msn4:











I dont do stock ;)


Nor me, mainly due to the fact that there wasn't much original left on my bus.....
Me neither - I like messing with it and it didn't need much bodywork...
 
sparkywig said:
I'm playing with the idea of a 2056 single port as almost all the parts are in the garage, except the heads need flycutting....

005-28.jpg


....but I do like the 1600 single port.
:lol: Bad boy! I knew you'd be up to something... Single carb? I wonder if it would like a single carb - you'd loose some HP, but it would look so stock, and as we know a lot of peeps think SP's must be crap which would just add to the satisfaction. Laurie put me off when I suggested it, I think he's happier doing what to him is a stock build, so he knows he can get the carb jetting right first time etc etc. I was going to push him to do it, then I found those TP heads and that swayed me. Single carb was sillyness to far for him to get involved in - he has to make a living.
 
Not sure its the answer to the speedo question when fitting smaller tyres but i recently broke my speedo after fiting a new cable. Had a spare clock lying round so drove it with all the clocks out first. then put just the speedo in. Thats when it hit me, set the GPS up on my phone and drove down a mile long road reading gps speed. Took the needle of and set it back a bit more. kept doing it till at 30 the speedo and gps read the same (only real speed camera issue i'll hit as if i get 60 i'll be proud) seems to be doing the job all back in working and reading correct speed now.
 
Nugsy said:
Not sure its the answer to the speedo question when fitting smaller tyres but i recently broke my speedo after fiting a new cable. Had a spare clock lying round so drove it with all the clocks out first. then put just the speedo in. Thats when it hit me, set the GPS up on my phone and drove down a mile long road reading gps speed. Took the needle of and set it back a bit more. kept doing it till at 30 the speedo and gps read the same (only real speed camera issue i'll hit as if i get 60 i'll be proud) seems to be doing the job all back in working and reading correct speed now.
Great idea! There is no Zero mph on mine anyway, the guage starts at 10mph and that's where the needle rests. :lol: Wierd these earlies.
 
Mark6455 said:
So what should I be looking at then dude
Tyre size on rear?


Largest Possible

195/65/15

185/65/15

195/70/15

185/70/15

Its also down to personal preferance on the look! :mrgreen:
 
I've fitted my adjustable springplates so can now wanna fit a stock size tyre on my stock rear rims. What is the right size tyre for a 14" wheel anyone?
 
I thought I should do a calculation like you did Sparky. I've "guessed" mine judging passing a 30mph flashing sign and on that basis I'm reading approx 10% under. BRB....


I have 185 80 14's on back because I'm perverse.
So at revs where std tyres would be doing 70, I'm doing 69.25mph - not far off
And travelling at 69.25mph, at those std 70mph revs, with my 175 65 14 tyres (circumference 1831.5), the speedo will read 78.3mph so my 10% wasn't that close.

More useful to me on the road would be a speedo conversion factor, never mind the engine. Mine is 1.13x what the speed is in reality, so to go at 60mph the speedo needs to read 67.8mph.

But then the speedo is inaccurate anyway, so I'm going to use 10% which agrees with the flashing signs in my area.

:mrgreen:
 
You can use your GPS/Satnav (assuming you have one) for an accurate speed. Saves doing all the math! :D
 

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