Hey all, fitted a supercharger kit that came with my mini last weekend and to say I'm disappointed with the results is an understatement. I know it needs to be set up on a rolling road for maximum performance but because I'll need to travel a long distance to get to one plus everything else I'm trying to get it running well enough that it's acceptable to drive but really there is very little difference in performance between now and before I fitted the charger. There is slightly more oomph esp low down and I'm getting a little bit of torque steer but I wanted overtaking power.
Ok the facts, the engine I think hasn't been rebuilt but it is under 40k miles. Compression is slightly low, all 4 are around 110 but within 10% of each other and oil down in each cylinder increases compression by 10-15 on all 4. I'm not sure if my compression gauge might just read low tho as I did a test on another vehicle and it read low as well but she starts fine, doesn't miss a beat and drives fine before and after charger.
Engine tune, assume internals and cam are standard for a 93 BOC (1275cc). Fitted 1.5 rockers and adjusted them after I put decompression plate (I know a bodge, if I need to rebuild engine I'll get dish pistons) between head and block. Head is a big valve modified to stage 3 spec I believe. 1.75 LCB and exhaust system, HIF44 carb with BDK needle in it. Tried BCA but way too rich, BDK still goes slightly rich down to about 12:1 on full throttle, Aldon mappable ignition and supercharger is M45 but don't know boost it's pushing.
Here's what I've set map at currently, low down pull is not bad but don't want to go crazy with the advance. Think the standard turbo is set to go to 32 degrees?
Surely I should be getting decent power out of it, for reference I'd be happy if the acceleration was on par with my 1.9td pug 306 which has 90bhp but is a big fat ass.