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Old 09-27-2010, 11:51 AM   #1
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Ess power claims?

Hi,been told by a uk tuner that the power ESS claims for there supercharger kits are a bit down eg..cfr525=525bhp but its around 490-500bhp...but he said he can remap to the actual claimed figures or a little more? Is this true??
Anybody fitted a ESS kit but power is not what there quoted??
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Old 09-28-2010, 11:35 AM   #2
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Didn't you guys in UK invent english? Why don't you actually use it?
ESS is actually known to be honest about their HP claims (they calculate crank hp by assuming 15% drivetrain loss, where other companies work with 20%)
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Old 09-28-2010, 12:47 PM   #3
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He is absolutely correct. It is pretty well known that they their kits don't put out their advertised numbers, especially on the s65 platform.
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Old 09-28-2010, 01:32 PM   #4
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Old 09-28-2010, 03:13 PM   #5
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I thought this was kind of common of most (not all) tuners fact the same could be said of manufacturers claims in the first place.. there is a fair amount of rounding up and "ideal case" scenarios quoted all round..

I recon the power as posted (525 in this case) is a theoretical max for the kit but not necessarily achievable each time you dyno it.

Take a look at the old AA stage 2 gen 3.. it was punted as 520BHP but I doubt that was achieved often from the stock kits...

Not that I'm knocking them or any tuner.. just that I wouldn't be surprised if everyone "massages" the hp claims a little. Take a stock M3 from BMW themselves.... rated as 250 kw (335HP) but who actually gets that out of even a new one?


Last edited by Matt Q; 09-28-2010 at 03:15 PM.
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Old 09-28-2010, 07:08 PM   #6
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I would not suggest re-tuning the software that runs our superchargers as we spend hundreds of hours developing the files so that the kits perform properly.

When comparing numbers remember that it is delta gains you need to compare and not just absolute power as dyno's used and test conditions will always give you different numbers sometimes higher and sometimes lower than expected. A good example of this is a customer who recently installed our VT1-445 on his E46 M3. He did a proper before dyno and used the same dyno to do his after. This kit is rated to add 32% power to the car and his dyno shows he gained about 35% over his baseline.

This is a customer who also did a proper before and after on the same dyno with our E9X M3 VT1-535 supercharger. This kit is rated to add 30% power to the car and that is exactly what he made.

When this method of testing is used our kits will always make the power we rate them to make if the car is performing properly and the kit was installed correctly. We often see our products exceed our power ratings but we try to always rate expected gains on a worst case scenario. If you are ever interested in the power we rate our different kits at you can reference the product description sections on our website. Each product has a rating on what the proper gains will be over stock.
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Old 09-29-2010, 09:45 AM   #7
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That first graph is from my car and I gotta say I'm very pleased with this ESS system, it has performed flawlessly. My upgrade to VT2-500 is being shipped to my house, so I should have it installed soon. I'm looking forward to the additional power and will post the results afterwards.

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Old 10-03-2010, 06:23 AM   #8
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I will be going for the ESS VT2-500 kit once im done modding other stuff on my car.
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Old 10-06-2010, 12:21 AM   #9
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Actually I got a proof that ESS doesn't blow up their crank hp numbers sitting in my garage.
M54B25 with ESS TS1 is rated at SAE 285 (242whp based on 15% drivetrain loss). I put my car on a dyno today and it pulled 243 whp.
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Old 10-06-2010, 09:23 AM   #10
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A buddies ESS VT450 kit I put on his E46 M3 made a good bit OVER what ESS claimed. Almost made at the wheels what they claim at the crank on a MUSTANG dyno .
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