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      12-19-2014, 09:44 PM   #1
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Official Harrop TVS1740 Supercharger Thread

Because the last thread was extremely long and convoluted, I thought it would be a good idea to start a new thread with more concise information on the kit, and ongoing developments.



Harrop Engineering: TVS1740 E9X M3 Supercharger Kit


Designed and manufactured by Harrop to OE standards specifically for the E9X M3, utilizing the latest generation Eaton TVS supercharger technology. Installation is of OE appearance and fitment leveraged from designing and supplying OE customer supercharger programs, including Ford and Lotus.

The first positive displacement supercharger manufactured for the S65!
The TVS1740 makes full boost at low RPM’s, providing more low-end torque versus other supercharger kits on the market. Regardless if you daily drive or track your M3 regularly, you will enjoy the additional power on tap.

BPMSport is proud to be direct calibration partners with Harrop on this project. The factory MSS60 Digital Motor electronics unit works seamlessly with Harrop’s revolutionary electronic by-pass control system, providing instantaneous power and torque delivery.

Features:
• World first positive displacement supercharger for S65 engine
• World first front inlet front drive Eaton TVS 1740 supercharger
• Full Boost at low RPM’s
• Latest intercooler system technology
• Unique bypass actuation control
• OE appearance and operation




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Last edited by Mike Benvo; 12-19-2014 at 09:49 PM.
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      12-19-2014, 09:45 PM   #2
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Official Stage I Dyno Chart has been released:



We've had a lot of inquiries about Stage II and will be sure to update this thread with any developments. There is no estimated release date as of yet.
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      12-19-2014, 09:46 PM   #3
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      12-19-2014, 10:08 PM   #4
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Damn that area under the curve... This kit is beast.
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      12-19-2014, 10:19 PM   #5
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Looks pretty cool! Does this have the laminova core intercooler like some other E46 twinscrew kit had? I thought those were pretty cool!
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      12-20-2014, 12:18 AM   #6
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My only concern with this is IAT. Other than that solid kit.
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      12-20-2014, 12:41 AM   #7
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Quote:
Originally Posted by Eazy-E90
My only concern with this is IAT. Other than that solid kit.
IAT's are actually pretty respectable for a positive displacement kit. The intercooler works quite well. With the pump off, the highest I was able to get it was 176F after a number of pulls.

In normal operation, the IATs are within 30 - 40 degrees of ambient temperature. Because of the electronic bypass design, you'll actually see the IAT drop once you get into boost as it gets air from the supercharger instead of from the plenum inlet. I will follow up on this with some logs of IAT next week.
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      12-20-2014, 03:20 AM   #8
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Mike,
Is this still a shop oriented install or has it been documented for a self install?
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      12-20-2014, 07:13 AM   #9
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good god id kill for something similar on the s54. literally kill. lol. Best FI kit in general I've seen in a long time, let alone on this platform, looks totally oem.
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      12-20-2014, 08:26 AM   #10
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Here is to hoping a pricing drop, but damn great looking kit. Thanks for the update Mike.
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      12-21-2014, 06:33 AM   #11
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Solid. If i wanted to go FI this would be the one.
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      12-21-2014, 07:24 PM   #12
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530-ish RWHP isn't bad for stage 1.

Any plans for a TVS2300 or maybe a whipple 4.0L ?
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      12-21-2014, 08:33 PM   #13
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Quote:
Originally Posted by Disturbed View Post
530-ish RWHP isn't bad for stage 1.

Any plans for a TVS2300 or maybe a whipple 4.0L ?
That is not on a dyno jet in sae. One dyno jet dyno in sae was posted and showed around 500 rwhp if I remember correctly. The big advantage is the low end -- it did 300 lbs rwtq at 2500 rpm. That is impressive on one of these motors.

Last edited by pbonsalb; 12-21-2014 at 10:01 PM.
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      12-21-2014, 08:41 PM   #14
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I am extremely interested, but it all hinges on the price for me. Technology aside, unless it comes close to the price of a ESS vt2-595, I can't see me spending the money on it, as I can get the ess installed brand new for under $10k
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      12-21-2014, 10:10 PM   #15
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Quote:
Originally Posted by ssabripo View Post
I am extremely interested, but it all hinges on the price for me. Technology aside, unless it comes close to the price of a ESS vt2-595, I can't see me spending the money on it, as I can get the ess installed brand new for under $10k
You get what you pay for. Centrifugal is cheaper to make, cheaper to fabricate hardware for, and cheaper to tune. It also delivers less torque in the rpm range in which you spend 95% of your driving time. The ESSVT595 won't equal the torque the Harrop stage 1 makes at 2500 rpm until 6000 rpm. Centrifugals are great -- I have had one, but they are nothing like a turbo or positive displacement supercharger in terms of power delivery. If it is all you can afford, though, get one. Still a lot more power than stock and if you wind it up, it will go pretty well.
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      12-22-2014, 03:23 AM   #16
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Quote:
Originally Posted by Mike Benvo View Post
IAT's are actually pretty respectable for a positive displacement kit. The intercooler works quite well. With the pump off, the highest I was able to get it was 176F after a number of pulls.

In normal operation, the IATs are within 30 - 40 degrees of ambient temperature. Because of the electronic bypass design, you'll actually see the IAT drop once you get into boost as it gets air from the supercharger instead of from the plenum inlet. I will follow up on this with some logs of IAT next week.
is this alot higher compared to a centri or turbo setup??
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      12-22-2014, 12:18 PM   #17
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Quote:
Originally Posted by pbonsalb View Post
You get what you pay for. Centrifugal is cheaper to make, cheaper to fabricate hardware for, and cheaper to tune. It also delivers less torque in the rpm range in which you spend 95% of your driving time. The ESSVT595 won't equal the torque the Harrop stage 1 makes at 2500 rpm until 6000 rpm. Centrifugals are great -- I have had one, but they are nothing like a turbo or positive displacement supercharger in terms of power delivery. If it is all you can afford, though, get one. Still a lot more power than stock and if you wind it up, it will go pretty well.
Oh I know! But again, with a smaller market (how many e9x M's are realistically left in the market that would be willing to spend the money for any kit?), and with a price point that may be much higher than an ESS for example, how many units do you foresee being sold?

I've been holding off on a kit for almost a year due to various circumstances, including potential turbo kits and positive displacement SC's, but from early indications on this kit, it may be cost prohibitive for many of us.
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      12-22-2014, 08:24 PM   #18
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Quote:
Originally Posted by Beedub
Quote:
Originally Posted by Mike Benvo View Post
IAT's are actually pretty respectable for a positive displacement kit. The intercooler works quite well. With the pump off, the highest I was able to get it was 176F after a number of pulls.

In normal operation, the IATs are within 30 - 40 degrees of ambient temperature. Because of the electronic bypass design, you'll actually see the IAT drop once you get into boost as it gets air from the supercharger instead of from the plenum inlet. I will follow up on this with some logs of IAT next week.
is this alot higher compared to a centri or turbo setup??
A replacement twinscrew blower cost me about $2k. I believe a centri blower is a couple of hundred. Looks like both kits use a custom intake manifold so I would guess wildly that most of the cost difference is hardware related.

But eaton/roots type blowers can also last a real long time.
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      12-22-2014, 08:54 PM   #19
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Quote:
Originally Posted by ssabripo View Post
Oh I know! But again, with a smaller market (how many e9x M's are realistically left in the market that would be willing to spend the money for any kit?), and with a price point that may be much higher than an ESS for example, how many units do you foresee being sold?

I've been holding off on a kit for almost a year due to various circumstances, including potential turbo kits and positive displacement SC's, but from early indications on this kit, it may be cost prohibitive for many of us.
i was real interested in this kit. but i would just grab a ESS or VF 620 kit inter cooled for cheaper. Been on the market longer also. So what if it doesn't make the torque. i get a lot more power for the highway runs.

Overall though this harrop kit is great and sounds great. not trying to knock it.
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      12-22-2014, 09:16 PM   #20
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Quote:
Originally Posted by bigjae1976 View Post
A replacement twinscrew blower cost me about $2k. I believe a centri blower is a couple of hundred. Looks like both kits use a custom intake manifold so I would guess wildly that most of the cost difference is hardware related.

But eaton/roots type blowers can also last a real long time.
No doubt that the cost of production on this kit is higher than the others - not to mention the electronic bypass system and hardware controller as well.

Each supercharger is dynoed by Harrop on a supercharger dyno, and has a factory fill of oil with recommended service intervals of 100,000 miles.

The manifold on this kit is a fantastic piece, have a look at some of these cutouts from SEMA this year:

http://www.bpmsport.com/blog/labs/20...kit-sema-2014/



Quote:
Originally Posted by Beedub View Post
is this alot higher compared to a centri or turbo setup??
Fortunately not much higher. The IC setup is very efficient and also does not block the factory oil cooler. The other kits on the market do block air to the factory oil cooler, causing an increase in oil temperatures that this kit will not see due to lack of airflow. The front mount heat exchanger on this kit mounts directly above the factory oil cooler, and even with a close inspection you can not tell that anything is different than stock.
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      12-22-2014, 09:19 PM   #21
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The intercooler is mounted inside the manifold???
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      12-22-2014, 09:23 PM   #22
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Quote:
Originally Posted by m3aviator View Post
The intercooler is mounted inside the manifold???
Yes, there is an intercooler core on each side, as well as a front mount heat exchanger. It's a really nice setup.
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