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      04-09-2014, 10:06 PM   #419
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It's time to have a little fun.

I wanted to know how well the Harrop TVS would perform on the street and what it would take to get equal performance from a centrifugal supercharger. So I fired up CarTest to see how the Harrop would perform, then I went to the Dyno Database to find a dyno that would give equal performance. I think I found a pretty good match (it took a few tries).

According to CarTest, these are about as equal as I could make them. The Harrop slightly outperforms on the 60-130 by 0.10 second, while the ESS 625 I used outperforms on the 1/4 mile by 0.10 MPH and 0.18 second. I'd call that pretty equal and looks like I found a good comparison.

To visually see what that looks like on the dyno charts, here's the dyno of each kit that gives equal performance.



Finally, here's the CarTest results that show equal "street" performance based on these dyno charts above. Interesting to say the least.

1. BMW M3 2008 ESS VT-625, 545 WHP SAE, DCT 3.15
Dyno Database: http://www.s65dynos.com/showDyno.php?recID=636

2. BMW M3 2008 HARROP TVS-M3, 514 WHP SAE, DCT 3.15
Dyno Database: http://www.s65dynos.com/showDyno.php?recID=688

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      04-09-2014, 10:17 PM   #420
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Quote:
Originally Posted by SickeM3 View Post
So you are, otherwise you would not have taken the time to say that your not at liberty to discuss something you have no part of.

Regardless, goodluck, we are all awaiting feedback
Lol there doing tuning on there own I've been down there a few times
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      04-10-2014, 12:55 AM   #421
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Quote:
Originally Posted by regular guy View Post
It's time to have a little fun.

I wanted to know how well the Harrop TVS would perform on the street and what it would take to get equal performance from a centrifugal supercharger. So I fired up CarTest to see how the Harrop would perform, then I went to the Dyno Database to find a dyno that would give equal performance. I think I found a pretty good match (it took a few tries).
Nice comparison. I have not been following the entire thread, perhaps this has already been addressed. Does the Harrop system redline, as according to the diagram you used and I assume your input to CarTest, at 8100 rpm?
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      04-10-2014, 07:35 AM   #422
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Quote:
Originally Posted by Roman@ESS View Post
The VT2-625 dyno is wheel also. It is the same dyno "dynopak" and correction as the other. It was used for comparison I'm sure to show the difference using the same testing method.
Ah, I stand corrected. Thanks.
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      04-10-2014, 07:48 AM   #423
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Quote:
Originally Posted by kitw View Post
Again, that's not boost control

Audi's sueprcharged 3.0t motor (both the lower power one and the S4 motor) actively bleeds off boost ~4700rpm on up, even with the throttle closed. That's why you can make power with just a tune on those cars.

Do you have a bypass as well, for light throttle applications? Seems that fuel economy would suffer badly without.
I'm familiar with how the 3.0 TFSI works. I was just implying without the dump valve controlling your boost, you can't run a positive displacement supercharger on our cars.
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      04-10-2014, 08:00 AM   #424
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Quote:
Originally Posted by regular guy View Post
It's time to have a little fun.

Based on your data, i'm impressed with this kit! With less hp and less boost (im assuming?) it appears to have more "area under the curve" then the centrifugal SC. If we had a dyno that showed the TVS to redline (i'm assuming it goes more than 8100) then it can even be more impressive imo. The drivability of the TVS has to be pretty good based on your comparison.
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      04-10-2014, 08:45 AM   #425
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Quote:
Originally Posted by BobS View Post
Based on your data, i'm impressed with this kit! With less hp and less boost (im assuming?) it appears to have more "area under the curve" then the centrifugal SC. If we had a dyno that showed the TVS to redline (i'm assuming it goes more than 8100) then it can even be more impressive imo. The drivability of the TVS has to be pretty good based on your comparison.
And the tune isn't finished yet, I believe?
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      04-10-2014, 10:14 AM   #426
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Quote:
Originally Posted by Jonjt View Post
And the tune isn't finished yet, I believe?
If true.... even more impressive
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      04-10-2014, 05:51 PM   #427
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Quote:
Originally Posted by Veritable View Post
"mere" 500bhp max output but over 400ft.lb. available at between 3000-4000rpm?*

*PS, just talking out of my arse there so don't believe those numbers for a single second; it's just an example.
Looks like I wasn't too far off Except to stretch the torque range from 3000 - 6000rpm.

I do drive a similar setup every day in the CTS-V, and it's quite nice. Makes power differently for sure, but quite nice nonetheless.
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      04-11-2014, 03:04 AM   #428
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      04-11-2014, 09:10 AM   #429
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Quote:
Originally Posted by biglare View Post
So you are not involved in this initial tuning, however you will be involved with the "retuning" after their initial tuning has been completed. Is this correct? I'm just trying to get an idea who is tuning this S/C.


Your determination in making shit in threads is beyond disgusting. Guess recently which company made a software for another company's hardware? The one you love. Not questioning anything, just trying to put an end this your crap.

Oh and
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      04-12-2014, 07:19 PM   #430
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"Ive got nothing to do with it" or some variation of that, is vastly different than "Im not at liberty to discuss"

#hujan - Im confused on your comment, mine has a REAL application here; dont you have more butt dynos and "+1's" to post and review with..?
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      04-13-2014, 03:21 PM   #431
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IN-4-UPDATES.

Max torque at 5.3K RPM looks very good. Torque falling off at higher RPM is expected for this type of kit. After the tuning dust settles I hope peak power stays near 8K.

Will this car be ready for Bimmerfest-2014 happening next month? Are we going to see the finished product by then? I still remember their head research guy from about a year ago saying that their plan was to get this kit out in the fall of 2013. Why is it taking so dam long and why are they not reporting their progress directly on this forum instead of getting 3rd-party comments? I hope they realize that this is where their future customers will likely come from.

Last edited by Top_Gear; 04-13-2014 at 03:36 PM..
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      04-14-2014, 09:40 AM   #432
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I want this right now!!!!
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      04-16-2014, 02:43 AM   #433
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Just received this Update via Email, I cannot wait for the Release!

Quote:
Hi Guys

Updating development of our TVSM3 Supercharger kit, we currently have a number of kits installed on Australian cars undergoing road testing in different states and enabling refinement of the calibration.

See attached a recent Stage 1 Development Calibration vs. Stock. Our development car retained the standard mid-section exhaust with primary & secondary cats in place and an Akrapovic slip-on rear section.

All the latest new development images and video are now available on the TVSM3 minisite (tvsm3.com).


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      04-16-2014, 02:59 AM   #434
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Found this on Youtube

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      04-16-2014, 04:03 AM   #435
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Ashtaron- any talk regarding release dates?
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      04-16-2014, 04:09 AM   #436
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Originally Posted by Acap14 View Post
Ashtaron- any talk regarding release dates?
Nay
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      04-16-2014, 10:37 AM   #437
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Listed at $13k USD MSRP on the website so we have a price point now.

This kit is getting more interesting all the time.
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      04-16-2014, 12:19 PM   #438
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Only 6psi peak boost.... thats pretty low for the dyno they posted! Then again, who knows how that dyno reads
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      04-16-2014, 02:00 PM   #439
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Quote:
Originally Posted by BobS View Post
Only 6psi peak boost.... thats pretty low for the dyno they posted! Then again, who knows how that dyno reads
The important metric we need to know is what the Supercharger RPM is. This will determine how much more 'room' there is with the TVS1740.

Since this a positive displacement supercharger (Eaton TVS), the manifold pressure readings are a measure of the engine's efficiency (or inefficiency).

The more inefficient the engine, the more boost will be achieved at the same blower RPM, and less HP/TQ.

If, for example, the blower RPM is maxed out on this application and the S65 is only generating 6psi of manifold pressure, that is excellent!. That means the engine is consuming the extra air (re: oxygen) and making very efficient power. If, at the same blower RPM, the S65 was generating 10psi of manifold pressure, the horsepower would be lower, as the extra air is turning into pressure, and not being consumed.
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      04-16-2014, 03:17 PM   #440
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Loving the stories - ie old info from months ago dated as new; and engine theory.. Would be a shame for them to oversell and under-deliver. Lets just wait and see what some 3rd parties can pull out with it
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