Fast Intentions exhaust and header comparison. Before and after UPRev tune (Dyno)

XwChriswX · 04-09-2010, 12:18 PM

Quote:

Originally Posted by semtex

You want it to go up as early as possible to its peak level, then stay there. What that translates into is a car that pulls early and continues to pull all the way to redline. If you had a curve that went upwards, it would mean that the car only pulls as the revs get high (think Honda VTEC). And I don't think you'd want that with this car as people already complain about how there's a lack of grunt below 3k rpm.

OH ok. I thought you wanted it to 'keep' pulling, so going up on the scale. See like I said, I'm pretty low on knowlege of the science of dynos lol I just know higher numbers = good (minus practicality)

semtex · 04-09-2010, 12:28 PM

Quote:

Originally Posted by XwChriswX

OH ok. I thought you wanted it to 'keep' pulling, so going up on the scale. See like I said, I'm pretty low on knowlege of the science of dynos lol I just know higher numbers = good (minus practicality)

Right. A flat torque curve means that it keeps pulling. A torque curve that goes up means that as rpms build, it pulls at a higher rate. You'd see that with many turbo apps -- as the turbo spools up, the torque increases, but prior to the spool-up there's not much torque (aka turbo lag). Now, what concerns me about Pablo's curve is that, based on how the curve drops off at 5k, it means that as his rpms climb from 5-7.5k, his car is actually decreasing its rate of pull.

XwChriswX · 04-09-2010, 12:30 PM

Quote:

Originally Posted by semtex

Right. A flat torque curve means that it keeps pulling. A torque curve that goes up means that as rpms build, it pulls at a higher rate. You'd see that with many turbo apps -- as the turbo spools up, the torque increases, but prior to the spool-up there's not much torque (aka turbo lag). Now, what concerns me about Pablo's curve is that, based on how the curve drops off at 5k, it means that as his rpms climb from 5-7.5k, his car is actually decreasing its rate of pull.

Is that a 7AT problem? Or something specific to his runs? I hope all 7ATs arent like that... That would piss me off. lol

You Smoke a CRX to see him putt putt putt past you just before the 1/4 mile lol

semtex · 04-09-2010, 12:42 PM

Quote:

Originally Posted by XwChriswX

Is that a 7AT problem? Or something specific to his runs? I hope all 7ATs arent like that... That would piss me off. lol

You Smoke a CRX to see him putt putt putt past you just before the 1/4 mile lol

Well that's why I posted wstar's dyno sheet a couple of posts above. Did you miss that? lol

XwChriswX · 04-09-2010, 12:44 PM

Quote:

Originally Posted by semtex

Well that's why I posted wstar's dyno sheet a couple of posts above. Did you miss that? lol

I saw it, but i didnt remember it until after I posted mine.. and I'm too lazy right now to ninja edit... Need to eat, strength waining...

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