Before anyone goes too far with this... is Evangelos measuring ride
height the same way you defined it on your chart? The big number just
makes me suspicious that "what we have here is a failure to communicate".
Just something to double-check... apologies if I'm wrong.
paul.hunt1@virgin.net had this to say:
>Well, 17" is very high - so high it is off the top of my chart. It should
>really be around 15" with a stock setup.
>
>I don't have a CB GT but my CB roadster and my RB factory V8 GT both exhibit
>very similar shackle position and spring shape - the lower shackle pin is
>about 5/8" behind the upper shackle pin, and the springs are almost flat.
>This is with relatively new CB roadster springs and old GT springs.
>
>Your checkstrap length seems correct from what someone else with a 73 has
>said elsewhere.
>
>It seems to me your springs either have too much arch or are too high a
>loading. If you can bear to get a spring off, put it on a level surface
>upside down and measure the distance from the top of the top leaf to the
>ground and I will compare it with my RB roadster springs - again not an
>exact match with yours but it should give us an idea if the arch is badly
>wrong.
>
>PaulH.
>
>----- Original Message -----
>From: Evangelos Makris <xirias@hol.gr>
>To: <paul.hunt1@virgin.net>
>Cc: <mgs@autox.team.net>
>Sent: Thursday, August 24, 2000 12:33 PM
>Subject: Re: chekstrap question & measurements
>
>
>> Here's the measurements I got from my 1973 BGT with chrome bumpers:
>>
>> Rear ride height: 17.25" for the right side and 17" for the left side.
>> Brand new Checkstrap length (hole centre to hole centre): 8.25"
>> Bump clearance: 6.25"
>> The rear springs have 7 leaves each and the rear shackles are slightly
>inclined
>> "rearwards" with the car on its wheels.
>>
>> The exhaust-to-axle clearance is about 1/2" and the handbrake cable chafes
>on
>> the exhaust tube as it passes over it. The point at which they cross is
>where
>> the exhaust tube curves upwards to enter the rear silencer box.
>>
>> So, is this OK? How can I put the new checkstraps in? The only way I can
>imagine
>> is to ask for someone to sit in the boot while the car is on ramps (I have
>to be
>> underneath to work) so the rear springs are a little bit compressed. All
>> pointers are welcome!
>>
>> Regards,
>> Evangelos
>>
>>
>>
>> paul.hunt1@virgin.net wrote:
>>
>> > The exhaust is *supposed* to go under the axle and so does the handbrake
>> > cable.
>> >
>> > When the car is on its wheels there should be slack in the rebound
>strap,
>> > but you do have to jack under the axle some when the body is supported
>on
>> > axle stands to get the strap on its pins. How long are your straps?
>> >
>> > What rear ride height do you have? Have a look at the web site below
>(click
>> > 'Spanners' and 'Ride Height') to see how to measure the height and some
>> > typical measurements from around the world. How does yours compare with
>> > these? I have had RB roadster springs on my CB roadster and connected
>up
>> > the straps no problem. It looks like either you have very wrong straps
>or
>> > very wrong springs or the springs are incorrectly fitted or located.
>Can't
>> > go far wrong at the front eye, but is the rear shackle pointing
>backwards or
>> > forwards as it drops from the chassis rail to the rear eye? It should
>be
>> > backwards.
>> >
>> > PaulH
>> > http://www.mgb-stuff.org.uk
>>
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
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