We were lucky enough to be given the opportunity to handle the conversion of an SMG equipped BMW M6 to a 6-speed manual gearbox.
Manual? You ask…Did BMW even make a manual M6? Apparantly it seems they did – 701 to be exact (323 Coupes + 378 Convertibles) – but for the USA only!
The one option missing from the UK models was a 6-speed manual instead of the SMG, after all we are probably the best market for it!
Our client asked us to research and look into the best ways to convert his car over to a manual transmission.
As soon as the car arrived we set about removing the existing SMG gearbox allowing us to see the access available for linkages, clutch lines etc.
Our client supplied the manual 6-speed ‘box which was imported from the USA for a US M6, complete with clutch and flywheel.
We sourced a pedal box from a 530d, and hooked up the clutch lines from the pedal box to the master and slave cylinders.
We removed the perforated holes provided by the factory (how nice of them) so we could run all the cables and lines under the car properly, just as the manual M6 would be.
We had to have a custom gearshift gaitor built as this doesn’t exist for RHD 6 series, as all 6 series cars in the UK were either auto or SMG.
The engine ECU has had to be programmed to know that it now has a manual gearbox attached, otherwise as far as it’s concerned there is no gearbox attached and will only run in ‘get-me-home’ mode.
That’s about it, if you would like to know more you can call us on 01992 443900 or email [email protected]
Some of you may remember this R34 GTR, we had it in for a coolant leak, which unfortunately turned out to be a cracked block.
So a second hand N1 24u rb26 block was purchased.
We reused most of the Nitto 2.7 kit, the pistons were replaced, the crank had a very minor polish. When we came to reassemble the bottom end, we measured the crank to bearing gaps using plastigauge (can be seen in the pictures) and ring gaps were measured and adjusted If tolerances were to small. Now all the tolerances and gaps are perfect we proceeded to built the engine up using only the best components for reliability when this GTR is tearing up the track!
Once the engine was fitted, we run it in properly with religious engine oil changes, with the correct oil.
Now for mapping. And who better than Romain at Syvecs. He did a brilliant job with this car maximising engine performance and reliability. The car made just under 600 bhp after the engine was mapped, due to the turbos underperforming, so this is to be continued! With new turbos, this car will make 600bhp+!
Gary has his car back for now, until next time