Supercharged 1993 500E

[gsxr]

Dyno figures were reported secondhand and were estimated crank HP, not rear-wheel HP. Some people use overly optimistic conversions to convert RWHP into crank HP, so I would much rather see the original graph with RWHP numbers. And also to see the shape of the curve, and to see the torque curve, etc. A dyno graph shows a LOT more than a single peak number. I always find it strange when people can't produce the graph.

 

[gerryvz]

That's a "he told me", followed up by an "I assume...". I meant the graphs

Dyno figures were reported secondhand and were estimated crank HP, not rear-wheel HP. Some people use overly optimistic conversions to convert RWHP into crank HP, so I would much rather see the original graph with RWHP numbers. And also to see the shape of the curve, and to see the torque curve, etc. A dyno graph shows a LOT more than a single peak number. I always find it strange when people can't produce the graph.

You guys who need to know the poor guy's dyno graphs, social security number and underwear size should call him up and ask for such.

Contact info is at http://www.t-g-a.com
http://www.t-g-a.com/team.html

hans@t-g-a.com

I suppose the next thing you're going to say is something like "Dyno graphs or it didn't happen!"

Cheers,
Gerry

 

[yao500e]

Cool! That car is well-known, Hans was the owner/founder of TGA (Texas German Autohaus), website here.

It's an Albrex supercharger setup. From memory it's low/medium boost (maybe 0.5-0.7 bar?) with slightly reduced compression. I think there's a piggyback ECU that fires a 9th injector under boost but otherwise retains all factory engine management. Hans claimed it dyno'd at 457hp when it was running properly but no dyno graph was shown, and I suspect that was based on an optimistic conversion from RWHP to crank HP.

More details in this thread.

BTW, congrats on the score, and welcome to the forum!

very cool. 457hp is quite optimistic.
0.5 bar is roughly 7 psi. a modest safe good boost in my opinion for a daily driver car
7 psi should probably at 60 to 70hp at most which is really great in my opinion. So my guess is probably 380hp to 390hp range?
again, we want to take into account longevity and daily comfortable drive-ability in an e500e car.

 

[nocfn]

Sadly that shop sold into new hands when Hans retired. I had work on mine done there as well and that is why I bought it. I have not been able to go to a MB Club for Houston in quite a long time, so I was surprised when that event took place.

 

[gsxr]

I think 457hp is possible, with fairly high boost (maybe 1 bar or so). But, anytime the dyno sheet is absent, I automatically question the accuracy of a random number provided. 457 at the crank is 375hp at the wheels, which is amazing if legit. I want to see the RWHP number and conversion factors used. Social security number and underwear size would add credence as well, as Gerry noted in post #52 in that thread.

That said, 400-420hp or so is definitely realistic, especially with reduced compression and higher boost. I think a stock 10:1 compression engine may be limited to ~400hp or so just because you will be somewhat restricted on how much you can increase boost while avoiding detonation. The inability to adjust ignition timing is another problem when retaining all factor ECU's.

 

[yao500e]

I think 457hp is possible, with fairly high boost (maybe 1 bar or so). But, anytime the dyno sheet is absent, I automatically question the accuracy of a random number provided. 457 at the crank is 375hp at the wheels, which is amazing if legit. I want to see the RWHP number and conversion factors used. Social security number and underwear size would add credence as well, as Gerry noted in post #52 in that thread.

That said, 400-420hp or so is definitely realistic, especially with reduced compression and higher boost. I think a stock 10:1 compression engine may be limited to ~400hp or so just because you will be somewhat restricted on how much you can increase boost while avoiding detonation. The inability to adjust ignition timing is another problem when retaining all factor ECU's.

my e500 is low mileage. I am keeping her as stock as possible.
The e50 amg is also low mileage, keeping her bone stock too.
My c36 is over 100k miles, that another story. its a drivers car so maybe a powerdyne low boost supercharger is in its future. an extra 40 to 50hp would be nice for a often driven car. Again, gotta balance reliability with extra performance.

 

[gsxr]

Again, gotta balance reliability with extra performance.

I am sure the M119 would be plenty reliable with the power level at 400-450hp. However, the cost and complexity of supercharging is substantial. Note the modifications needed to the PCV system... the passenger valve cover routes to the supercharger area, and driver side has a backflow valve added. Adding the crank pulley and supercharger belt may require eliminating the mechanical fan clutch, leading to cooling issues, especially in warm climates. Hopefully the new owner can provide better photos of what's going on up there. A skinny aftermarket electric fan/fans will not be adequate.