There will be intercooled and non-intercooled versions. When speaking with Sal from Evolve during development BimmerBoost put emphasis on creating a non-intercooled version. Salman stated that he believes the S65 is extremely temperature sensitive from what he has seen from testing and did not necessarily like the idea. However, BimmerBoost believes an entry level alternative is necessary to what is already on the market. After some debate Evolve decided they will offer a 4-5 psi non-intercooled entry level kit.
All Evolve kits use a Rotrex C38-91 supercharger. This is the largest supercharger in the Rotrex C38 range and it flows 11% more air than the C38-81. The RPM limit on this blower is 90,000 rpm, higher than any S65 V8 kit using a Vortech blower. No other kit features a Rotrex blower.
This is the C38-91 compressor map:
The C38-91 retails alone for $2595.
[email]Sal@evolve has made a big point about the cooling when supercharging with this motor. That is why the plenum design is innovative and features a larger volume than competitors. The design of the kit is built around intercooling and not charge cooling.
8 psi is good for the ~625 crank range. Here are dyno graphs at 7.5 psi on pump gas with the Evolve exhaust system:
Evolve has tested up to 9 psi but believes anything higher than 8 is pushing it on the stock internals with this blower. Production kits will feature 8psi for markets with fuel to support it. Here are graphs at 9 psi:
The kit will be available for export and will be available for 91 octane fuel like what is available in California. The kits for 91 octane fuel will feature about one pound less boost, so 7 psi. Here is a rundown of the currently planned kit offerings and specs:
Rotrex C38-91 Kompressor (1100CFM)
Self Contained Lubrication System with separate oil cooler
High Tension Belt System with 270 DegC Belt Wrap
Teflon Coated CNC Machined Billet Aluminium Bracket
Teflon Coated CNC Machined Billet Aluminium Bracket Kompressor Bracket Housing*
Teflon Coated CNC Machined Billet Aluminium Plenum with Optimised Velocity Stacks
Teflon Coated CNC Machined Billet Aluminium Lower Bank 2 VANOS Cover
Aluminium Crank and Water Pump Pulleys
Evolve/ITG High Flow Foam Maxogen Filtration System
8 x Bosch Motorsport Fuel Injectors
Front Mount Air to Air Intercooler
Engine Management System:
Calibration optimised both on dyno and road under various weather conditions
Recalibrated MSS65 DME with optimized
Calibrations for 91(US)/95(EUR) + Octane Fuel
Non Intercooled 500-530HP System @ 5 PSI ---- Not Sure we want to release this yet! This is the one that needs the most amount of testing. Not happy releasing anything non intercooled.
Air to Air Front Mount Intercooled 580-600 HP @ 7 PSI
Air to Air Front Mount Intercooled 600-630 HP @ 8 PSI
(Boost readings are taken at plenum)
(Note – Power will vary and will be heavily dependant upon ambient temperatures as the S65 is very dependant upon combustion temperatures)
*Reduces Stress on Tensioner Pulley and has a secondary function of protecting injury from belt
Below are some additional pictures. Keep in mind the bracket is engineered from high grade 6082 aluminum that will additionally be coated with xylon/teflon. It will be able to handle all the rigors of supercharging without flexing whatsoever. There are no spacers used in the bracket.
There is also no cutting required for the front mount intercooler.
Expect more details in the coming weeks as the kits near completion for production.