Mopar Muscle Association UK

I believe for the first MOT I will need to know the weight of my Charger.
What does it say on your log book??
My car is a 69 with 440 and auto transmission.
Not quite finished yet, but not far off!!

you do NOT need the weight for any car mot, but it will be just under 2 ton

1830kg - from 1970 production stats and specs

For the first MoT,if the cars not been registered before they will want the weight for the brake test. Once on the MoT database everything will be there for the future. My Fury,although it fits,never goes on the rolling road.He always does a Tapley test along the road.

If it's an LSD it shouldn't go anywhere near the roller.

Great.Thanks people. 1830KG sounds good enough for me.It will be its first MOT.
Actually got the seats bolted in yesterday, and got to sit in the Cahrger for the first time!!
Not got LSD.

Bratfink wrote:If it's an LSD it shouldn't go anywhere near the roller.

Why?
Both wheels turn at the same time.

Each back brake is tested separately,so spinning the rollers on one side and hitting the brake would upset the diff. It's the same with permanent 4wd systems,spin up either end and overspeed the centre diff.

latil wrote:Each back brake is tested separately

Didn't know that. It has been years since I was actually present at an MOT. Didn't remember that bit.

Did know about 4WD though. Obviously you don't want to be driving only 2 wheels with full time 4WD.

latil wrote:so spinning the rollers on one side and hitting the brake would upset the diff

ok but isn’t that what the diff is supposed to do … compensate for the difference in speeds of the rear wheels when cornering??

I guess what you are saying is that on the brake test rollers the difference between 1 wheel rotating and the other stationary is ‘too much’ for an LSD … ??

the dart 83/4 suregrip - is going for it's 1st mot in Northern Ireland - Goverment Centre. The brakes are tested on rollers. Does this mean i should travel to England for the test. Gerry

Ignor all of this its so very very wrong i'm blushing









on an LSD car I think it depends if both sides are driven.

if the opposite side rollers is set to free wheel
LSD has nout to worry about

if both are driven the drive from the spinning side is tranfered into the diff centre when the side to be tested eventually stops

that just wears it out for no reason


4WD me know nothing

would expect it to be bad....cogs n springs flying out etc like the day you opened up ya clockwork mouse to see how it worked


Dave

thanks Dave, got me worried- already booked ferry for the Pod

NoNO and damn no

i am so very wrong

Right

i described how to test an open diff car

exactly the oposite to what i should have said

relaised as soon as i left the office this afternoon

came over in a sweat

and been bustin to get back and say so since

apologies

its wrong....its right if you could test 1 brake at a time which of course you can't

James is right

1) i should just read all posts before fireing off i'll thought out answers between meetings.
2) should engage brain before hands

to test an LSD car both rollers need to run at the same speed and same torque so when brakes are applied its simulates as near as damn it a real braking scenario with minimal mis match between sides.

thus the diff unit only gets exposed to the same kind of imbalance as it would on uneven surafces or patchy areas where traction varies.

what i described will fry the cones or clutch packs because the undriven wheel will stop dead even oif the driven one does not

a sure grip equipped car had a sticker in the drivers door jam explaining this and possibly warnings about towing

what you need to do is find out if the MOT station has a suitable setup to do this

otherwise its open road testing with some kind of meter....

I'll PM you

Dave