Dyno Numbers

[Justheman80]

Looking at this dyno chart, would I really gain that much TQ from 2,700 to 3,00?  Or is that just a shock load on the dyno and thats why the numbers go up so fast?  I guess is what I am asking are they dyno that accurate in the low rpms when they start rolling on the power?

 

I am considering the 6.2 intake swap on my L83 as the low end gains look impressive for towing at a light throttle crusing.

[M1ck3y]

Increasing plenum volume shift the power band, increasing low end power at the expense of top end power.

 

So if you have the same modifications including the aftermarket cam, you would see similar results.

Edited October 25, 2021 by M1ck3y

[lucas287]

@Justheman80when's the last time you were at 100% throttle at 2700-3000 RPM? The only time that happens is when you're quickly sweeping past that range when you floor it at a stoplight from a dig. In any other real-world scenario, I'm not seeing where that could happen. 

 

Dyno graphs can be a bit misleading for those looking at gains in driveability. People see gains down low and think that translates to part throttle transient gains, but in reality, they are two very different things. 

 

I'd buy a Soler Ported throttle body before touching the manifold. He specifically (and scientifically) increased flow in the low throttle input areas (5-30% throttle). He even says that a dyno wouldn't reveal much about what his porting does. 

 

Taking it a step further - I'd use his throttle controller too. I can mimic what a throttle controller does with tweaking the Driver Demand tables in HPTuners and you can make the bottom end feel VERY torquey (which just means it's opening the throttle more) down low. You would need to run 91+ octane though as it will attempt to advance ignition timing to the max to make that demanded torque.