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Drive with lifted rear wheels.
Huttojb - 21/12/16 at 09:27 PM

Hey.

Just want to ask peoples opioions; I have no rolling road and wondered if anyone has lifted the rear axle and attempted to drive there car.

I can see me going through the back of my garage!!!! Any opinions or alternatives. I'm trying to monitor the car electronics but need some of my signals fitted up to a scope and you may of guess, scope is not battery operated.

Just throwing it out there.
Jason.

Ugg10 - 21/12/16 at 09:41 PM

Can you use one of the cigarette lighter 240v inverters to run it ? 120w ones are pretty cheap if that is man enough ?

YQUSTA - 21/12/16 at 09:46 PM

I did it when setting up my gear indicator, as long as you chock the front wheels and take care there shouldnt be a problem.

I got up to a fair old lick as it had to go to 6th and tested throught the range.

I would consider facing the car out of the garage rather than into it though for added safety.

Huttojb - 21/12/16 at 09:46 PM

It's a Tektronix Scope? What do you think. I do have a 500W 12v converter which I could use.

Jason.

Huttojb - 21/12/16 at 09:50 PM

quote:
Originally posted by YQUSTA
I did it when setting up my gear indicator, as long as you chock the front wheels and take care there shouldnt be a problem.

I got up to a fair old lick as it had to go to 6th and tested throught the range.

I would consider facing the car out of the garage rather than into it though for added safety.


Exactly what I'm trying to do. My gear indicator has a PWM and I'm monitoring it to find out how it works. Problem is, my car has a bike engine, my drive is up hill so cannot reverse / roll / push my car in backwards to my garage. I did fit a winch a few weeks ago for things like this so hopefully I can pull it in with my winch. But yeah, I was thinking either do it on the road outside my house with extension lead or face out of garage just in case.

Didn't know how the rear diff would handle having no road friction?

Jason.

big-vee-twin - 21/12/16 at 10:09 PM

I did it to test my gearbox clutch combo.

loggyboy - 21/12/16 at 10:13 PM

providing the axle stands are secure and your not planning on shaking the car around like your doing a trial. Ive had my tin tops up in the air checking I could get all gears and done 120+mph on the spot! Its amazing what lack of friction does to a drive#trains response!

YQUSTA - 21/12/16 at 10:17 PM

quote:
Originally posted by Huttojb
quote:
Originally posted by YQUSTA
I did it when setting up my gear indicator, as long as you chock the front wheels and take care there shouldnt be a problem.

I got up to a fair old lick as it had to go to 6th and tested throught the range.

I would consider facing the car out of the garage rather than into it though for added safety.


Exactly what I'm trying to do. My gear indicator has a PWM and I'm monitoring it to find out how it works. Problem is, my car has a bike engine, my drive is up hill so cannot reverse / roll / push my car in backwards to my garage. I did fit a winch a few weeks ago for things like this so hopefully I can pull it in with my winch. But yeah, I was thinking either do it on the road outside my house with extension lead or face out of garage just in case.

Didn't know how the rear diff would handle having no road friction?

Jason.


It was a very noisy with a lot of rattles from the rear end as you say with no road resistance there isnt anything to absorb things, but once you get over the initial WTF is that, it's ok.

mine was a bike engine also.

Andy D - 21/12/16 at 10:18 PM

Wheels need to be well clear of the ground as the tyres expand with revs!

CosKev3 - 21/12/16 at 11:04 PM

Remove the rear wheels if you are concerned

Slimy38 - 22/12/16 at 08:25 AM

quote:
Originally posted by CosKev3
Remove the rear wheels if you are concerned


That would be my first thought as well, make sure the car is well supported anyway but with the wheels off the worst that can happen is that you cut two grooves in the floor and have to replace your brake discs. Discs won't provide enough friction to move a chocked car.

joneh - 22/12/16 at 08:38 AM

This sounds like the making of a Darwin Award.

Huttojb - 22/12/16 at 09:26 AM

quote:
Originally posted by joneh
This sounds like the making of a Darwin Award.


And I nominate Jason H. Who's action ran himself over by his car!!!

CosKev3 - 22/12/16 at 10:14 AM

quote:
Originally posted by Huttojb
quote:
Originally posted by joneh
This sounds like the making of a Darwin Award.


And I nominate Jason H. Who's action ran himself over by his car!!!


Remember the important part,set up a camera to catch the action and give us a laugh

adithorp - 22/12/16 at 10:32 AM

It'll be fine as long as you use decent axle stands (not just a jack) and chock the front wheels. It'll rattle like crazy idling in neutral as the prop/transmission with occilate from a combo of clutch drag transmission free play and no load... don't panic! You'll get some of the same in drive, mainly as you engage clutch, but not as much. I wouldn't do it without the wheels as that will make it worse as there'll be even less inertia in the system.

40inches - 22/12/16 at 03:50 PM

This is the sort of noise you can expect. I thought the gearbox, prop and diff had all failed at the same time

nick205 - 22/12/16 at 04:10 PM

If supported and chocked well I can't see it going wrong - it does have an element of Ferris Bueller's Day Off about it though

Ivan - 22/12/16 at 04:44 PM

If you have drum brakes at the rear don't remove wheels as drum might fly off if it's held in place by wheel, or at least put the wheel nuts on tight so they hold the drum and don't work their way off the bolt and turn into little bullets.

SteveWallace - 23/12/16 at 12:31 PM

I propped mine up whilst I was testing and calibrating the speedo cable and had no problems. It feels very counter intuitive though, no matter how many times you look at it and convince yourself that its stable. I would do it outside though as you probably don't want to be running the engine that vigorously in an enclosed space that your breathing in.

Worrying about the neighbours fence was one thing, but I lost my bottle when their kids came out to play on our shared drive.