[SILVY968]

I saw these guys at the Las Vegas SEMA show.

The product sounds interesting. Has anyone heard of this system? Would it work on our cars?

Here is the web site:

http://www.electricsupercharger.com/eramspecs.shtml

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[flash]

it's an interesting idea, and one that has been discussed a bit before



i notice that it doesn't make a lot of power (6-8 hp), but then the "boost" is only 3psi, so i wouldn't expect a lot, but a normal supercharger at 3psi should make a good 30hp - it would be interesting to see what the difference is in how they make boost



i suspect, that as the name indicates, it's the same as a "ram-air" system in how it add power - it looks like it is basically creating the same effect as going 80mph with a ram air setup, but while sitting still



also, i notice that it requires 60 amps of power - this is a bit over a 1hp draw, but more importantly, i don't think we have the 60 amps of alternator to spare - it would likely require a change in the pack to bump the output up from the 105 to somewhere about 150 - i know i would have a real hard time running it right now, with the power pulleys - i don't have enough current to charge the battery at idle as it is

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[Greimann]

I have seen this web site before and without actually picking apart their technology, on the surface it looks - lets just say plausible. Certainly more credible than the E-bay scheisters that were selling marine bilge blowers.



They do at least illustrate the technical requirements that you need an efficient design and beaucoup power in to have any hope of adding just a small amount of positive pressure at speed. 833 watts is 1.11 horsepower, so it does draw a bunch of electricity. This kind of draw can only be sucked right from the battery and for short durations. 0-60 sprint. You certainly could not go for a top speed run where you are WOT for a minute or more.



Some large diesel busses have actually been fitted with the scroll type of electric supercharger to improve low RPM power and mainly emissions. They cut out after the initial run up.



I never have seen or heard of any non-biased review of this thing. Anyone want to volunteer?

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[flash]

oof - not me - as dave has pointed out, i'm already backed up on projects as it is



yeah, that power availability problem was my worry too - lol - i can just see my car dying already - also, with a current drop like that, i wonder what the efffect is on spark

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[chris]

It's almost too easy to be skeptical of this product....but I'd love to see what a dyno shows (after tuning I assume).

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[BruceWard]

If you look at the products section of the sight they only claim 1 & 1.7 psi for the products there. The Speed Force Racing & Ninemeister supercharger kits for the 968 are producing very close to 350 BHP.



Personally I think that the electric drain is too high and that you would be better off going with Dave's airbox modification. The airbox modification vs stock dyno charts look as good if not better than the eram dyno charts.

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[flash]

hmmmmm - loooks like maybe i misread "3.0 lbs. of thrust at 800cfm" to be 3 psi



i too found it odd that the airbox mod, that dave and i worked out together, produced significantly more than the e-ram unit, but it does raise the question of how much could be gained by a ram setup, and if it might be accumulative

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[Brian]

are you two getting along on this one?

sure would be nice.

<img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

happy thanksgiving!

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[S_Cal968]

After reading the FAQ page a couple of points caught my attention. First the wattage is figured at a voltage of 13.88v. That seems a little on the high side, most cars run lower than that. And, a 60A draw is not hard on a 500ccA battery, it's the duty cycle which is a longer duration than say a starter motor. As a result I bet battery life is shortened. I suppose one could employ a deep-cycle battery.

Second, I'm guessing that the flow increase is minimal because they don't mention if there's any fuel map issues with the A/F ratio change. Granted, the A/F mix will be adjusted, but does this device stay within a fixed map of the 968[?]. I would guess any serious forced induction system would require a special chip.



Why not just get one of them there ternado thing-a-ma-bobs... <img src="/forum/images/smilies/968/biggrin.gif" class="smilie" alt="" />

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[BruceWard]

This image





Is described as "e-RAM energized while mounted to a closed intake with a pressure gauge monitoring pressure. Note that the static pressure provided by the e-RAM reads 1 psi."



Eric S. will know better than I do but I believe the SFR and Ninemeister superchargers are configured for 4 to 6 psi and providing a 100+ horsepower gain.



This page is worth reading for any considering the purchase http://www.electricsupercharger.com/tech...view.shtml .



It is claimed to provide a 4% to 6% gain in BHP. Perhaps that is possible. Certainly it is better than some of the pure scam electric superchargers.

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[Greimann]

What that "lab" test doesn't tell you is at what throttle opening that measurment was taken. If this was at idle, the the e-ram was pushing against a closed butterfly. Easy as cake to generate positive pressure. Lets see a reading during a WOT dyno run. I would be willing to bet that the e-ram wimps out big time.



Perhaps one can just order the stickers, they are worth at least 2 hp. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

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[flash]

it says in the description that it is only active at WOT - i believe the dyno charts are also at WOT

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[SILVY968]

Anyone willing to be the test lab?



"Finally, unlike any other manufacturer of "bolt-on" performance additions, we GUARANTEE you will see AT LEAST a 4% increase in horsepower by adding the e-RAM on your intake or we will give you your money back!*"

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[BruceWard]

I believe where they say "closed intake" they mean that it was pushing against a closed butterfly.



It does "wimp out" or produce significantly less HP than one psi out of the belt driven superchargers. I am not sure if Colin is using 4 or 6 psi for the 348 BHP model. I believe it is 4 psi, but lets work with 5 to be safe. 5 psi from the Ninemeister produces a 110 BHP gain or 22 BHP per psi. Which is a 9.3% gain per PSI.



If this thing really could produce 1 psi at WOT it would provide much more than a 4% gain.

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[flash]

i seem to remember eric saying that it took 7 lbs to get 348 - gotta look that one up now



you can't do that kind of "insta-math" (it just doesn't work that way) but it does seem to indicate that it functions like the name calls it (e-ram) and not so much like a supercharger

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[rustech]

I recall Neinmeister stating that they use just under 7psi (6.7psi?).

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[BruceWard]

Lets revise the earlier numbers for 7 PSI.



Ninemeister produces a 110 BHP gain or 15.71 BHP per psi. Which is a 6.7% gain per PSI.



If this thing produces the 4% gain claimed that would be 9.44 BHP which is still significantly less gain than Colin is getting per PSI.



This dyno chart from the SFR website shows RWHP and RWTQ as well as boost levels. I am surprised they are running so much boost on stock internals.

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[flash]

again, the premise is flawed - you cannot apply linear math like that - it's not a simple matter of x hp per psi





this is a glorified ram air system, and should be considered accordingly

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[rustech]

OT, but I wonder why SFR's dyno chart ends at 6,400rpm? Is the car more limited in revolutions? How much boost would it be running at 7,000rpm (8psi?)?

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[SILVY968]

Does anyone know the correct model number Tornado Fuel Saver that will fit in our cars?

At $45.00 it seems like an effective power adder.



They can be found at:

http://nukethehut.zoovy.com/product/FRSHTO...?META=googleTFS



Mercedes calls them tumble flaps and uses them in their engines. Ford also uses them in their 3 valve Triton engines.

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