GregNZ

Has anyone completed a turbo upgrade to a M30B34 for street use? If so what kit and where was it done? I am curious to know what power has been achieved from what boost and how is the torque & driveability? Cheers Greg

Wanted - must be in excellent condition to replace cracked lense. Thanks

Thanks guys for comments to date. By way of clarification the 635 is late '82 ie on the e28 platform I would have considered Koni yellows but hit a blank trying to find the correct fit. I think Kodachrome may be right and they are no longer an option. Kiwi535 - appreciate your thought there - I guess that would be the M635 equivalent which I believe is @ 20 - 25mm lower and a little stiffer than the stock 635. I am not sure how I could confidently replicate that without using OE equipment which I expect might be considerably more than the Billi / H&R cost?? Regarding the springs - lowering @ 25mm would probably be @ ideal and might work with B6s - has anyone tried something @ that and if so using which springs and with what result? Based on my reading I kept coming back to H&R as the 'performance' brand of choice but that may be only because they are better at marketing And then if going that far am I better running to the B8s with H&R sport albeit 30 - 35mm lower than stock - if only we could try before we buy Is anyone running an e24 or e28 with Billi / H&R or similar ? Sorry I accidentally got this thread in the wrong forum - newbie!! Thanks again

I have started exploring options for a suspension upgrade to my 1982 635. The car is a car to be driven and enjoyed not a show car but also deserves to be beautiful :). I would like to lower the car a little to reduce the wheel arch gap and stiffen up a little. Could be say 20 - 35mm. I generally like a firm buttoned down ride but i am also concious that our roads are usually pretty rough and compromise is necessary. The car will be a street car used for just the occassional track laps at Hampton for fun and my driving pleasure but will not be raced per se. Options I am aware of; 1) Considered coilovers but most recommendations I received were, if not racing, stay with conventional struts / shocks 2) Billi B8s with H&R sport springs - lowers @ 30mm I think. Will this create negative camber issues and will the ride be firm but still acceptable for cruising? 3) Billi B6s with ... springs. Not sure whether B6 is compatible with lower springs and if so what effect is? I would welcome feedback from anyone with experience on the above or other alternatives. Thanks guys Greg

Hi all, Long term owner of a 1982 635 CSI, new to bimmersport. Looking to undertake a refresh of my baby and will probably seek advice on all sorts of silly and not so silly questions. Thanks to all who put this great site together and do all the hard work - much appreciated! Greg