Quote:
Originally Posted by KingLT1
Mike, Thanks for posting that. Paints a much clearer picture. The torque looks low on both units. So I am not sure if that is Dyno or tuning related but none the less it at least shows the 2650 gives up nothing down low and nets a much stronger top end. In that case it's a win win. 
Just curious if they both were dyno'd at the same boost level? |
Its the dyno here, and has always been like that, its a mustang 250 piece with a Superflow controller that has fantastic repeatably and good power numbers up top, but never gives a high low speed torque like some of the other brands.
No, not the same boost level, both tunes are done to achieve the highest possible power on 91 octane pump fuel. The boost pressure that made the highest power level on the TVS2300 was about 7.2 psi. With the TVS2650 we are able to run about 8.5 psi and still hold close to 20 degrees of timing - which is the magic point on these engines.
If you're below about 16 degrees you're running too much boost, you'll make more power by lowering boost and increasing timing and vice versa, if you're getting up to 22 degrees, and you have enough fuel, power is yours by adding boost and lowering timing. While there's a bit more to it than just that to make big power on these DI engines, that's a good rule of
