No, you're not the only one... many people have pointed it out in the past and have been attack by VRT for not being educated or openminded...

 

A torquey, small turbocharger is going to exhibit this behavior.....its not uncommon at all.

Also keep in mind, that the DynoPak operates the runs differently from most dynos. When you start the dyno run on a DynoPak, the dyno has to "settle" for two-five seconds.....someones longer depending on how the operator sets it up. The settling or loading, causes a pretty big boost in pressure at the onset of the run. So the trq curve ramps up much more aggressively that it would no a DynoJet or Dyno Dynamics....or the road...for that matter.

 

Yes, but a turbo only capable of making maybe 250-300hp CFM worth of airflow, is not going to produce 630+ TQ numbers over 500-600 rpms sooner than the engines natural peak TQ curve, like all ov VRT's Dyno's.
I mean cmon already with these guys and their dynos..somebody call them out and shut them up already..

 

A smaller turbocharger will generate a tremendous amount of airflow at low RPM, which will radically change the engine's VE, which will completely change the engine's trq peak and shape. I have seen trq peak between 3700rpm, and 4800rpm, depending on the type of turbocharger used. I imagine you have seen the same thing on your dyno.

I call it like i see it. The JWT cars are making really good trq down low, but lack the airflow to keep things moving in the higher RPM ranges...at high boost.

 

IIQuicksilverII is just a *****! Try to ignore him if that's possible. Hi vagina is probaly iritating him.

JET

 

Copy and paste as its applicable:

Sharif is absolutely correct. The ramp up time on the Dynapack is being modified to produce extremely high load on the hubs as soon as the run begins. I am not knocking VRT here. I have repeatedly told Mike and Scott they do great work and give them props for running their cars at the track as much as they do and running a returnless fuel system to do it. What I am calling into question is the way in which these dynos portray the power delivery. As Philthy mentioned the one curve that is valid on that attached dyno crosses well before the 5252 it should be crossing at. The HP and TQ scale are WAY off which also leads to misinterpetation. But what really caught my eye was the amount of boost these cars are building during the run. I was at JWT when they dyno'd Mike Bonnanis car. I watched the attached boost gauge hit 20 PSI the instant the run began. This was at 2000-2200 rpms as indicated on the tach. I don't care what kind of magic dust you put into the car those turbos aren't going to make peak boost the minute the rollers start turning unless the ramp up time is set so that the rollers are overloading the car. he was still running the Injen exhaust and I know for a fact it was hurting boost threshold due to back pressure. Now I am not saying that the run I witnesses was the dyno that was posted. Only Scott and Mike could answer that. And I know that there are reasons to ramp the dyno up like that. But all of those reasons are for tuning. You over load the car to simulate an extremely high boost situation at very low RPMs to make sure the cars tune is capable of dealing with that should it ever occur. However the ramp up rate I saw that dyno set to would only be replicated in the real world if you were driving at a 75 degree incline at full throttle in 2nd gear...In the end as Sharif said and USN dynos proved the peak numbers will likely be very close if not the same. So its not that the cars don't make the power they say they do. More so its that the cars to produce the power in the manner that is shown. I was at Stillen the day Mike dyno'd his G and the tires were spinning the whole time on the dyno in 5th. But on the one semi clean run they had the torque was MUCH more realistic from what I could see ont he flat panel they had set up. In the end its up to the customer to decide what they want to do and VRTs track presence at Willow and other tracks is not unnoticed. The same VRT cars are there day in and dayout and consistently run fast times there without mechanical failure and that is to be commended. I just personally think that the ramp rate used for the "peak power" run needs to be a bit more realistic.

 

So we are all in agreement then, the VRT Dynos aren't realistic... Kudos to them for tracking their cars and building some fast cars - they're just stretching the truth with the power levels...

 

Well I would say the curve is not realistic IMHO. Based on the ramp rate and boost threshold at the beginning of the run. The numbers may be real but the curve does not appear to be realistic.

 

I dont know why everyone is coming into my thread and arguing. I was just putting up 3 different charts from 3 different shops on MY car.

It looks to me like I am making lots of TQ really quick on this DD in Virginia


I honestly could careless what I put down on JWT's Dyno. I did the DD run just for ****s and giggles.

Please dont start bashing on me, because I would hope you can see I am not really backing any claims that VRT is making on any of the other cars they built. You should also notice that I am looking for a tune from places other than VRT now. I will post up more dynos once I find a good shop to do some work for me and retune my car. I might just be heading up to see Sam at some point.

please stick to Bashing on VRT in the orginial thread it started in so I can keep mine civil.

Thanks guys

 

IMHO i think that would be your best bet.

 

how the hell did i came here in an thread that just got revived after a month?

grow up Jet, stop chasing me around if you felt offended by pointing out you attitude problems you've been having lately thats your problem

i did have a lil argument over a month ago with doug on this thread but its all good, we cooled it off, unlike you and your childish attitude. I know you are old and "mature", so behave like that foolio

 

Who cares about your thread staying on topic, your dynos have already been discussed what else do you want people to say about them? No one is bashing on you or VRT, they are simply stating facts that needs to be stated. I find it a very good and educational discussion (not argument) and hope it continues.

 

I never experienced this on my dyno..The APS kit and the Greddy kit with larger turbos both make peak TQ at around 4700-4800ish, we never have had the pleasure of Dynoing a JWT kit, despite the many free offers I threw out there to the smack talkers, such as Rob Patel and Noah . Do you really think a turbo as small as the base JWT turbos are capable of producing over 600ft lbs of TQ on a properly loaded DD dyno? Cause I dont.. There was one Dyna Pack dyno out there where the car started at 150 TQ and 1800-1900 RPM's later was over 500 the dropped drasically to 150 again by redline..Dont you think something is amiss in that situation??
I honestly would love to do a Dyno of a JWT kit so I may compare HP and TQ curves myself...You yourself know that Dynapacks are easily manipulated and can be loaded to porduce such a freakish looking graph, without the risk of wheel spin.
Im not knocking JWT or their kits, just the way VRT is representing their Dyno Graphs..You yourself know what it takes to make over 650whp and do you think for a split second VRT has done over 700 with 800 ft lbs of TQ with their set up?If you do, I have a bridge to sell you..VRT is making 570-600whp at the most.Period, end of story..I would have more respect if they came clean.

 

I care about MY thread staying on topic, but your right its been discussed so now the thread is closed. Thanks for your input.