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FAQ:  eRAM Electric Supercharger
Dyno Test

Report by Bob Forrest

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The eRAM is a lightweight but powerful Electric Supercharger by eRACING of San Jose, CA. It's a 700 watt, 50 amp axial-flow compressor that puts out 3 lbs. of thrust at 750cfm. That translates to a 1 psi gain, and with two in series, net gain in pressure is about 1.5 psi. (One eRAM alone is .5psi but also relieves about .5psi of restriction, in most cases. A second eRAM adds another .5psi on to that number.)

eRAM with K&N, 10k JPG Super-eRAM with K&N, 10k JPG

I got together with Mark Kibort, designer of the eRAM and Super eRAM Electric Superchargers on Tuesday, 7/29. We installed (rigged with gaffer tape) an eRAM electric supercharger on my '94 Stealth base NT (which already was slightly modded with K&N FIPK and resonator removed), doing before-and-after dyno runs to determine if it does yield any real world HP gains. Well, it works, and even with a less than optimal 'quickie' install, (blowing air at around 40 degrees angle at the MAS honeycomb, instead of straight-on), we got a real 5 HP in the entire range of 3000 through 5500 RPM. We had clear repeat readings (3 runs each on the dyno at Frey Racing in Mountain View) of 170 HP before, and 175 HP after installing the eRAM.

{{{IMPORTANT NOTE: This is the HP gain 'Over and Above' the combined K&N FIPK & resonator-removal gains over stock... The Stealth base is rated at 164 HP, so the actual gain of the eRAM over stock is *unknown*-- it's somewhere more than 6 and less than 11 HP!!!}}}

Unfortunately, we couldn't get the Super eRAM to fit in the limited dyno time available, so no test was done on that model. I'm very encouraged that, at least for the non-turbos, this is a viable way to see almost double digit HP gains for under $300, since I think with a proper in-line install, we will see gains of at least their claimed 4% to 6% (8 to 10 HP for a base Stealth, 9 to 14 HP for a 3000GT SL or Stealth R/T). I'm envisioning 50% better numbers (or more) from the Super eRAM... There's already been some debate on the list about whether the eRAM will be effective on the TTs and VR-4s, but I'm hot on this being a good add-on for the non-turbos, once we figure out how to fit them in without trashing the stock intake 'hose'. Pictures are up on Mark's eRacing website: eRAM Installations

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Stealth NT Test, 15k JPG

We met at 'The Dyno Room' at Frey Racing, which is a company that's been around for 40 years and have respect in the racing community. Judging from a dozen or so NASCAR types and SCCA entries in the shop, I'd venture that these guys know what they're doing. All they do is try to squeeze every available horsepower from the cars they work on. Our little test on my car (with roughly 1/3 the HP of any of the other cars in the shop) was treated with great respect by their dyno guy, a soft spoken ex-racer named Terry Barnard (who had some interesting suggestions for us...). He had me start at 2000rpm, then take the car through 2nd & 3rd to 4th gear and hang at 2000rpm... When he said "go", I banged it to WOT through 5500rpm, then backed off and threw it in neutral. It really felt like driving at 120mph (what it said on the speedo), between the engine noise with the hood open and an humongous fan blowing cool air over the engine (the fan was as wide as the Stealth)!

Just an aside (for you Bay Area folks)-- Frey Racing will take a group of our Team3S S/3ks on one of their weekend "Dyno Days" and dyno your car for $60!

Although the eRAM was impressive as hell, I'm almost as excited by what Terry, Mark (and Mark's dad Bob, a former aeronautical engineer) had to say about the segmented intake 'hose' on our cars:  It steals horsepower! The friction created by all those segments, nooks and crannies is slowing us down. My summer project (which has now turned into a 'following-spring' project!), will be to pull out all my old engineering books, and try to design a smooth intake tube that reduces some of the air resistance that our present system creates. Any and all input or assistance you folks can give me in this endeavor is encouraged!!!


The eRAM and Super-eRAM are available direct from eRACING, and for sale on their website. eRACING is one of the "Good Guys Vendors"...

They give Team3S members a 10% discount!

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eRAM Photographs 1998-2004 Mark Kibort, All Rights Reserved.
Other Images 1995-2004 Bob Forrest, All Rights Reserved.