So I just had an Edelbrock supercharger installed on my 2009 Ram 1500. Left it for 5 days with Performance Improvements here in Toronto.
　
　
They also did a custom tune. The "before surgery" dyno numbers were 322 RWHP and 339 Torque. That's not totally bone stock though - K&N CAI, JBA Headers, Flowmaster Super 44 exhaust and running the Diablo 91 Octane canned tune.
　
　
After install I'm at 445 RWHP and 443 tq on 5 lbs of boost. I'm guessing that means I'm somewhere around 525 hp at the engine.


So far so good - I got one check engine code indicating it was running rich. That was after a temperature swing here and I cleared the code and haven't seen it again.


Two questions I have, both from the dyno read:


1. Why does the blower only start to make boost above 3000 rpm? (see the bottom chart on the dyno picture) I thought the ability of a supercharger to make boost early on was one thing that separated them from turbos.


2. Why is the dyno info all haywire at the end?


Thanks -


KDubya

 

At 2600 RPM you have double the torque. That's pretty significant to me.

Also, the new setup provides measurable power at about 2100 RPM, which is 500 less than the stock engine did.

Finally, you aren't comparing to a turbo dyno chart. I would bet that the torque starts out quite a lot lower and flatter, and then ramps up pretty steeply. As it is, I think that torque curve looks really good. Starts out pretty high and just keeps climbing.

 

Thx Dwaldmann.

Correction - the guys at Authentic Performance did the work. Performance Improvements had nothing to do with this mod.

KDubya