I think I would like to install a supercharger to my BMW. I have a few queries and concerns about the setup I'd like to address before I do indulge myself in such a kit.
My car is a 1999 E46 328i, which has done 145,000 miles. It has a full BMW service history. Will the engine/transmission be up to taking that much more BHP (190 to 320!!). What precautions can I carry out to make sure the engine is in top notch condition before adding all this power? (I bought a Haynes manual yesterday and would be willing to do the work myself). Will the transmission also take that much power?
Will I need to uprate the cooling system on the car? (bigger rad)
The supercharger kit itself makes 8psi of boost... which is a hell of a lot for an unmodified, normally aspirated vehicle to take. The C/R of the cylinders are for normally aspirated operation. Will 8psi of boost not just cause the engine to pre detonate and destrey itself without lowering the compression ratio? The kit in question doesnt even have an intercooler.
Will I not have to subsititue the existing sparkplugs for colder running ones?
Is the stock fuel pump up to the job?
If nothing has to be changed for reliable operation then BMW have really over engineered their car! None of the kit manufacturers mention any need for changing other components around.
I 90% finished a Zetec Turbo Project and I had to change all of the above, and then some (the other parts are included in the kit however, such as larger injectors, ECU tuning etc).
Last thing, I have found a few supercharger kits, most of which are on this website:
With a little more searching, I found another company, Active Autowerke, who also do supercharger kits:
This kit offers an 8psi supercharger for half the price of the other kits, with less boost, on the previous website. Whats the catch?
Thanks for your time