BimmerBoost contacted Dinan and asked first regarding their bolt on stage upgrades. Dinan will offer a tune, intake, and exhaust putting the power somewhere in the 650 horsepower range. A dyno was asked for to corroborate the horsepower claims but Steve Dinan said as the products are not available yet no dyno or pricing information will be released.
Dinan: We are doing software, intake and exhaust which will make around 660hp. Then we are rebuilding the engine and putting larger turbochargers on it and it should produce around 750hp. We are also doing a coil over kit integrating the electronic shocks, along with tubular adjustable sway bars.
BimmerBoost: Do you have any dyno numbers to corroborate the intake, tune, and exhaust horsepower claims? Any pricing info as well?
Dinan: All the power numbers are targets for development. There are no completed products (production versions) to measure, so we do not have any dyno graphs. There isnít pricing available as of yet, since we don't have the completed products.
What is very interesting is that with the upgraded turbochargers Dinan is planning upgraded internals. Due to the higher compression of the S63TU (10.0:1 for the S63TU versus 9.3:1 for the S63) and the higher boost pressure at 22 psi versus versus 17.4 psi in the standard S63 V8 Dinan believes stronger pistons and rods will definitely be necessary. Additionally, a drop in the compression ratio. They also hinted at a displacement increase but it is unclear if it will come from bore, or stroke, or both. The motor features a stock bore and stroke of 89x88.3mm.
BimmerBoost: Why rebuild the motor for only 750 horsepower which the stock internals can handle?
Dinan: Different connecting rods and pistons for sure. They arenít strong enough to handle that power and the compression is too high for a lot of boost. Possibly a displacement change as well.
Expect 750 plus horsepower. There is no timetable for this and Dinan obviously has a lot of work ahead of them. Still, very exciting times ahead for the new twin turbo V8 motors. It will be interesting to see if any of this development carries over to the N63 V8 as well which would make it a tuning bargain especially if built motor N63's matched the S63's which are based on the same basic design.