1. i heard that the n/a compression is different between s4's and s5's (s5 being slightly higher). is this true? i searched it and all i can find is that the s4 n/a is 9.4:1



2. does anyone know of a writeup for the m90 t-bird supercharger onto an n/a? i found a thread where a kid did it but it didnt have a writeup so i was wondering how difficult and what all he really did



thanks

 

Only thing I can answer from your questions is yes, s5 has lighter faster spinning roters and higher compression

 

It can be done but you are probably better off buying on of the atkins kits, and ditching the efi and going with a carb.

 

The kit would be a one off that you would essentially have to make yourself. If you od go that route may I suggest you look into the blower off of 04 and later GTPs. THey are series 5 Eaton M90's that have a significant improvement in efficiency over the series 3 blower that was on the Tbird.





BC

 

s5 na rotors are 9.7:1