Hi Iíve got an ESS VT560 kit fitted to my car (96.5mm pulley)
Other power related mods are:
Russ Fellows 4-2-1 headers & 100 cell cats /Dinan rear exhaust
Stock ESS Tune which i understand is conservative
The car is running really well, no boost leaks (smoke tested), boosting to around 5.5psi and no leaks when smoke tested. Itís daily driven and very reliable.
On the road it does feel a bit more quick than before in the mid range when I compare to when it was NA, mapped and had headers, - I would like a bit more here though.
....the power gains do become much more noticeable and you can really feel the car opening up over 5000 rpm
- i.e. on a track days (donít do more than 2-3 a year) or an open empty b-road (not often you get that where I live!) then you really do notice the extra power.
The car is also a little lighter than before (bucket seats, CF roof and CF front / rear bumper carriers, forged bbs RGR 18x10 rims all round, so some difference in acceleration may be attributable to this). It puts the power down really well, no fuss at all, so the chassis feels like it can handle more power. (Intrax coilovers/os giken diff/subframe reinforced/front & rear strut braces)
Iíd like a bit more mid range power/torque without sacrificing the top end and ideally power that is Re-producible with extended use, when the car was NA, at track day at Bedford , Iíd stop every 5 laps to allow the car to cool down, (better drivers than me might stop more often!); Iíve not done a track day yet with the car supercharged.
92mm pulley, bigger injectors & remap
Delete under plenum heat exchanger+add oil cooler with gulf filter housing mod
Decat pipes (will this help with heat also?)
And see how this runs, adding water injection if necessary.
The car is dynoing at 525-535bhp (4 consecutive dyno runs); it was previously putting out ~450-460bhp.
Iím also aware sometimes you can tinker too much when youíre onto a good thing, so thoughts and advice welcome! Itís still a family car (Iíve got oem child booster seats) and I do the school run a couple of times a week....
2002 BMW E39 M5
2019 BMW M4 30th Ed Jahre Vert
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