i also have the blitz controller, you can set the gain real high and the boost climbs like a banshee, it goes from 1 to 12 in a split second, or you can turn it down for a slower build, its pretty cool.

 

whoa, joe dirt how come your st spools so slow? It uses almost the same sized turbo as TN. 4200RPM it looks like, if im reading it right.

NVM, only taurens spools like that . And the scaling fooled me.

 

Remember that just because your power levels off at 4000 rpms doesn't mean that's when you reach full boost. Just like an NA car, you will still continue to build power as RPMs rise. I think many of these people build full boost well before 4000 rpms, and the dyno sheet is a bit deceptive.

 

^^what he said

 

Depending on how the operator starts a load based dyno, the boost curves and trq buildup can vary dramatically. One trick that some shops use, is to load up the engine, and generately nearly full boost, then release the dyno. The results is a massive trq spike and boost buildup at very low RPM. We dont do that, becuase it not indicative of a real world trq curve.

This trick is not possible with a non-load based DynoJet, FYI,

And you guys are right...different types of boost controllers and settings, can result in different boost curves.

 

Sharif-so some of these TQ happy JWT dyno's could be guilty of that huh?

 

Ouch

 

Comparing dyno's are useless. i could make my NA 350 put down 400whp! They are a tuning tool guys :P

 

I'm pretty sure everyone knows this, so that didn't really contribute anything.

They do give a GENERAL idea of power output and also power delivery (area under the curve), so you can't say they are completely "useless".

 

Different dynos in different locations are different, but you can still compare a graph to itself. You can look at 3000 rpms and 4000 rpms and note if there's a difference of 40tq or 80tq or what % increase it is and compare that to your own dyno chart in a relative way.

and then there's also equations to factor in elevation and the approx ambient temp difference that you can use to help kinda normalize graphs somewhat.