not rubbish, larger heavier cars and cars with wider front tyres have a more powerful steering pump / different gearing ratios to compensate - the less turns a wheel makes, the more pressure it put on the pas system
I'm not going to say that's not the case for other sizes and makes of cars, (because I don't know - it's perfectly plausible) but as has already been said, in the case of the LCR/TT225/S3 when compared to the standard Leon, and A3, the quicker steering rack is purely a performance enhancing feature, and nothing to do with the vehicle weight or tyre size.
a Leon Cupra R has a 2.9 turn rack, whereas the standard Cupras, and the poverty spec Leon have a rack with more turns (typically 3.5)
isn't it 2.7 on the quick rack Kev? I'm sure I tested mine at 2.7 turns too. 3.5 for standard FWD stuff is correct
please explain then why the TT has the same PAS pump as the A3, s3,
It was done as a performance upgrade to the steering handling. 2.5 turns gives better response and feedback that 3.3!
2 points, you post suggests the S3 has the same rack as the A3, the S3 rack is infact a quick rack like the TT.
Also, as I said above, it's 2.7 turns on the quick rack, 3.5 on the standard rack.
Has your car got ESP? If it has that needs to be considered too, you'd need to source a rack from an S3/TT that also has ESP, early ones didn't.
This makes no difference at all in terms of rack fitment, early non ESP S3's had exactly the same quick rack as all the others. the ESP works on the engine management and ABS systems, it has no input to the steering rack. ESP only uses the steering angle input sensor, which is in the column.
Haha this thread is epic.
An Audi TT rack won't fit your car, only works on pre-facelift cars. I can't comment on the LCR or S3 rack though.
You're just adding to the rubbish though J
LCR and S3 rack are identical to the TT rack.
The quick rack will physically fit onto the TQ, and any pre or post facelift A3 for that matter. and it will work too. The only issue is that some people experience issues with the ESP kicking in on long sweeping bends, because the ESP sees a difference in wheel speeds that does not correspond with the steering wheel input, because the gearing in the rack is different.
Whether this can be cured by recalibrating the steering angle sensor or not I'm not sure, but perhaps Kev can help with his wealth of ECU knowledge!