STi viscous coupling
01 May 2007, 05:23 PM
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The important point is buried in the last but one paragraph.
He also suggests that the biggest disadvantage of the 20kg/m coupling - on a streetcar - is its low speed manoeuvring characteristics. With increased driveline lock-up, there is noticeable fighting between the front and rear wheels.
That is a BIG understatement. I would not recommend a 20 Kg viscous on a road car the torque steer is horrible.
David APi
He also suggests that the biggest disadvantage of the 20kg/m coupling - on a streetcar - is its low speed manoeuvring characteristics. With increased driveline lock-up, there is noticeable fighting between the front and rear wheels.
That is a BIG understatement. I would not recommend a 20 Kg viscous on a road car the torque steer is horrible.
David APi
02 May 2007, 09:21 AM
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For a road car leave it standard. For a driver that will commit to a corner with a big bung and drift then 20 will be OK BUT the low speed characteristics prevent the 20 Kg from day to day use.
I understood that standard centre viscouses were 4Kg in the UK and the JDM cars. So 12 or 15 would be quite a hike. If I am wrong and 12 is standard then 15 will not show enough of a difference to be worth the hassle.
What he also doesn't say, is that the fit-it-in-the-car trick only applies to 99-on gearboxes of TY7564 variety You cannot get the back off a TY752 in situ.
David
I understood that standard centre viscouses were 4Kg in the UK and the JDM cars. So 12 or 15 would be quite a hike. If I am wrong and 12 is standard then 15 will not show enough of a difference to be worth the hassle.
What he also doesn't say, is that the fit-it-in-the-car trick only applies to 99-on gearboxes of TY7564 variety You cannot get the back off a TY752 in situ.
David
