I would like some advice on how to add more power to my car without having to spend more than $5K. HPS advises against modifying/changing the ECU, Headers, Exhausts, Intakes or just about anything else.

What are Green Filters or K&N Filters? Will they help. What about LSD? Any other suggestions.

I'm happy with the HPS system because I don't want to spend over $10K on the Charger. I know that roots blowers are not quite as powerful as Twin-Screw blowers but power kicks in earlier (lower RPM) I also heard they are a bit more reliable and simpler. Can anybody tell what else separates the new Eaton Roots blower from the Lysholm?.

I just needed a little differentiation from all the others and the extra kick when changing lanes. I'm too old (45) to track the car or set any records but if the value is there I would consider adding a few more performance options just for fun.

If want to keep it at 5k, go buy a set of Kleeman headers and an ecu. This should get you above the 400 mark. Plus, you can always add more later (i.e. supercharger, LSD, etc.)

Filters will add a nominal amount of power (if any). LSD is a big plus, especially when you supercharge the car (then it actually becomes a necessity).

Use search the function, there is a plethora of information on all the recommended tuners (i.e. Kleemann and Renntech).

Actually I've already supercharged my car with the HPS system. I've gained an initial 147hp without any ECU, Headers, Exhausts, Downpipes, etc..They told me I should some additional HP after a few thousand miles because the engine only had 800 miles on it when I did this. HPS does not offer other stuff I mentioned above so I was wondering if anyone has tried adding these to the HPS system and what were the results. Effective or not?

Here is my dyno chart. Adam told me that this should get better after a month or so of driving to loosen the brand new engine and also for the Car to adapt to the new SC.

That is a huge gain, with only a S/C. Mind you, this is RWHP we're talking about here. How are you not running a new ecu program with a s/c setup? Did you modify the fuel delivery?

Bennyz is running the Renntech s/c setup with almost every mod in the book and you're putting down 13 more HP than him on just a HPS s/c

Post some pictures of your setup.

Congrats on your HPS kit. I see you're in LA maybe we could meet up and compare notes or even do some test runs? Let me know or PM me your info.

This would be quite interesting to see.

Kleemann vs RennTech vs HPS! Do it!

yeah,
not to be an *** but all I have to say is suspect!
That is one hell of a S/C you got there.
Josh, for a stock S/C only, this upgrade is better than both our setups! And probably cheaper, I just don't get it

and for the record - rwhp and dyno does not tell how fast the car is!

Benny

Ya... no kidding. In terms of power, I was thinking the same thing. But there's definitely something to be said for the workmanship, reliability, prestige, exclusivity, etc. that Kleemann offers.

and i would thing that the ECU would have to be reprogrammed

If you spent 10K on the SC and now you want to spend 5K more for more power, why didn't you just get the Kleemann SC to begin with.

The HPS is a great setup. Only draw back i've heard is that HPS doesn't advise their customer to add other additional aftermarket mods (ecu, headers etc..) to their kit or they won't support it.

I'm no expert at this stuff and that's obviously why I choose Kleemann... but, I definitely agree... that just doesn't make sense. To add to that point, if it wasn't reprogrammed and the fuel setup / FMU wasn't changed, how could it run efficently and safely for that matter? How can you just slap a s/c on a car and not tune the car?

Guys I know you are all wondering how HPS is doing this. Working on cars I can say that Factory ECUs are very smart they can easily adopt themselves for slightly larger injectors and target A/F especially in open feedback loop. From what I can tell they use a black box which modifies timing and fuel trim and is actually laptop programmable.

So what upgrades would work with this kit and that I am currently considering it myself.

Thats a good question small upgrades like air intake, headers, high flow cats, and exhaust sytem. But I would take a preactive step and tune before upgrade and after.

Ideally I would like to see a custom ECU program for the car that retards a bit of timing for under load application, and softens A/F open loop target range, and modifies the pulsewidth for the injectors, and also gets rid of that annoying speed limiter

As far as your question "Eaton Roots blower from the Lysholm"

The Lysholm Blowers are similar to the Helical Roots blower however the rotor themselves are twisted a bit and have a conical taper. Which means these screw type compressors have an internal compression, making them more efficient in high boost applications. Because of the more efficient design of the screw you tend to see more boost in lower RPMS which means more power.

Whipple Superchargers are a good example of Lysholm Superchargers. And they give you info on them.
http://www.whipplesuperchargers.com/....asp?PageID=79

If had the supercharger installed already and wanted to spend another 5K I would probably get a Thicker headgasket made and installed and put a slightly smaller pulley made and have boost increased a bit :-P But then again you are probably asking the wrong person LOL.

At one point in time, I was interested in supercharging with Kleeman. Even with Kleeman, the supercharger could have been added as the sole mod. Reprogramming the ECU was an extra option that costed a bit more.

please post pics of new S/C, me wants to see!!!!

BTW, how much for the HPS system?

HPS has a special till Feb '06 $7500

I tried to upload 5 pics but the 1260 x 820 pixel files were too large. I will try to reduce the file size and upload again. There is one lower resolution one that was just added to the MYHPS.COM web sight GALLERY. It is the 1st pic (2006 C55 with the RUSNAK dealer plates.

The entire system cost me $6800 Materials + $1500 Labor to install and tune. But I got a further discount for waiting until after Thanksgiving Holiday. I can't give you the final discounted price since I doubt Adam can offer this price again.

I reduced the resolution and pixels. So here are a few pics.

.........s/c technology has been available for decades. There isn't really a big seceret that one company knows that the other is blind to. HPS gen s s/c was discussed about a year ago as being quite superior gen one and offering equal HP as Kleemann. Plus, you have no warranty from Kleemann and HPS offers a warranty. Kleemann has very good products obviously, but as you can see others do too. Obviously, his s/c is running efficiently in order to produce 414RWHP. Hero worshipping one company leads to lack of objectivity. This is not specific to Kleemann, as there are members of this forum that think Brabus and Jesus mean the same thing.

.........HPS does not have ECU, headers etc. A friend of mine was actually working to develop that part of HPS's business, including K1 mods for AMGV8K, but he left the car business. In just few years, HPS has markedly improved their s/c at half the cost of other tuners.

Ted

Interesting.... pretty cool man... 414 rwhp on $8,600... can't beat that.

For the pure enthusiast your money is well spent. For a little extra power without breaking my budget my money was also well spent. Your car is definitely the gold standard.

But I'll definitely consider some upgrades and will continue reading everyone's suggestions to determine the order of instalallation and the value of each.

I hope HPS begins developing complementary power boosting components soon as well.

Keep the suggestions coming! Thanks

how is the supercharge whine? Loud?

They tell me that this is a second generation Roots SC which has twisted rotors similar to the twin-screw types. As for the Whine, I cannot detect any until I hit 4000rpm but it sounds pretty quiet to me. It actually sounds a bit like a Jet "shoosh". Maybe it has something to do with the fact the SC sits on top of the engine instead of being bolted on like HPS's first gen. Another fact is that the HPS SC is not casted but billet machined from a single block of Aluminum so if there was any noise it would have been muffled by the Block. The overheating problem caused by the escaping air being re-pushed back into the engine a second or even third time has also been addressed because the gaps where the air escapes has been sealed/eliminated with much tigher tolerances. The machined Aluminum block head with the verticl grading also dissipates heat better than a casted SC according to several engineers and mechanics I spoke to and also read on the net.

All these supercharged C55's are making me droooooL

i heard about HPS a while back but never considered it since no1 every tried it. it is my mistake i believe - the s/c technology is not a secret in this industry... its the brand name that most of us care about =P If your HPS system works fine and you can really feel a difference, I'm really gonna go for it. 414 RWHP in an SLK55.. good lord...

=D
keep us posted!