I've found this on ebay: http://cgi.ebay.com/ebaymotors/ws/eB...spagename=WDVW

Assuming there isn't a bidding war on this item in the last few minutes and the price doesn't skyrocket, I will be purchasing this blower. It should bolt up with little difficulty being that it's for the Merc. 3.2L V6.

The plan is to find a larger pulley for the unit in an effort to lower the stock boost produced by this unit. If I can keep the boost under control I should be able to tune with either an S-AFC or AFR... We'll see.

 

Good Luck man! I hope you don't blow up your car. I also hope you now how to install superchargers, beacuse it is a very tricky science.

 

Installing wouldn't be a problem. I'm mechanically inclined enough to get the job done. The only real question is how well the stock engine takes to boost. As far as I can tell, no one has done anything quite like this before.

 

"You are correct Sir." The added boost could be a potential problem. I too have been on the search for Superchargers, and Turbo's. I have a couple of new small companies that have interest in building a Turbo. Hopefully one of them will pan out. And I know someone who has test car for them.

 

only 100 bucks, damn. id been on it but i dont wanna steal it from you. good luck.

 

Well you can bid if you like. garybayless (current high bidder) seems to have put a massive bid on the thing and the price is dangerously close to go above what I would expect to pay for a used supercharger off a wrecked car. If you get to the auction in the next hour and 49 minutes, and have the cash, go for it.

 

A friend of mine has a turbo on his 350Z, and that engine has a 10.3:1 compression ratio. I know his turbo produces a lot of boost, because he's dyno'ed the thing at over 400 hp. I've emailed him about the issue of boosting a high compression ratio engine, to see if he's had any issues or knows of other turbo Z owners with issues.

 

wow, it was 108 when i saw it last. Now its 280. at 108 its a steal, at 280 i dunno.

 

It's not so much the compression ratio I'm concerned with - it's the integrity of the pistons and rods. The AMG Kompressor engines typically use a higher compression than the standard Merc engine and are still able to run high boost. The AMG internals, however, are strengthened to accomodate the boost.

It looks like Kleeman installs their superchargers (bolt on 400hp) without any internal modifications. I could be wrong on that, but based on the vague description on their site, it looks like the $22,000 kit is just for the blower, after cooler, assorted intake bits, and labor. They make no mention of internal engine upgrades.


Yeah, x'ed, someone was watching that auction carefully and was purposely outbidding every potential bidder in an effort to raise the final price. I have no proof of this, but that's what it looked like to me. There are currently two more auctions for AMG blowers listed now and I've emailed one seller offering to purchase his out right. We'll see what happens.

 

Incase you aren't familiar with Ebay. You can set a max price that you are willing to bid on an item, and if someone outbids you, it automatically up's your bid to beat theirs. It will keep doing this until your maximum bid price is reached. It is likely that this "careful watcher" had done this and that was why his/her bid was always higher, until is reached $275

 

Yeah, I know. There was at least two instances that I witnessed where that "careful watcher" person was, in fact, out bid on the item by a second person who surpassed his max bid. The first person immediately entered another, higher bid, though. It's probably more likely that this person is like me and was bored at work and had nothing better to do than watch that auction and was just outbid at the last second.

 

If you look at the bid history, it gives the time and date of the bids. The $275 bid was placed two days before the auction ended and before anyone else had bid on the auction. Every bid after that, except for the winning bid would have been automatically outbid by the first bidder. The winning bid and several others were placed within minutes of the auction ending. I've seen that a lot on Ebay auctions. People wait until the last minute to place a higher bid hoping that the previous high bidder either won't be watching or won't have time to place another bid.

 

I see now. thanks for the clarification. regardless, I still don't have a blower.

 

This could be a good way to go about getting a blower and seeing the results with pretty minimal initial expense. It would definately be beneficial if someone had mechanical knowledge and did step by step. I have a friend who could probably do it but he mostly does honda's so I don't know if i'd let him. Anyways, good find Tsaxman, hopefully you'll win next time a bid like this comes around, because I trust your judgement on the process.

 

Thanks, x'ed. I've employed the help of a friend of a friend who knows even more than I do about FI, and he's a Mercedes buff, to boot. We're in the process now of locating all the parts. The guy I'm working with knows of a distributor that will sell me a rebuilt AMG blower for $250. This is a steal considering the unit will be in certified, working order.

There are quite a few more parts necessary to get the car up and running than I had originally thought, but I figure the entire project can be completed for under $1500. Of course, you'll have to run low boost without an engine rebuild, but my research tells me that there's no reason you shouldn't be able to tack on an addition 60whp or so without any problems.

 

I'm probably displaying a lot of ignorance here, but wouldn't a 5-7psi boost be enough to get our cars around the magical 300hp mark, without stressing our engines? I don't see any reason why we couldn't run a supercharger with 6psi pushing an extra 80-100hp, which would bring us somewhere between 298 and 318hp (assuming the car is still stock - my hp figures are a rough estimate of 15hp per 1PSI, with a little bit of play on either side).

I'm also curious if adding a blower would effect those of you who have aftermarket chips in your car?

Thanks for doing all this research for us - You got a fan club watching to see how it turns out!

--X

 

Nah, you're not displaying ignorance at all. Taking into account the parasitic loss of a supercharger, 7psi would probably net you somewhere around 80hp above stock (maybe a little less, but for the sake of this post, 80 is good enough). That puts the car at around 295bhp. I'm being a bit optimistic with this next number, but if you factor in 15% power loss through the drivetrain (on a manual gearbox, at least) you'll arrive at right around 250rwhp. That would make for a very quick Crossfire.

I'd be a bit leery of going much higher than this, though. Being that no one has converted a NA Crossfire to FI before, there isn't any background information on how much boost the stock engine can handle. You've also got the rest of the drive train to worry about. Everything from the gearbox back seems pretty sloppy, so I don't know how well it would hold up to the added power.

Of course, you've also got to worry about fuel delivery and tuning. Being able to bolt on boost isn't any good if you can't supply the fuel to accomodate it. Odds are, however, that the stock fuel pump and injectors are sufficient for low boost and AMG parts can be swapped in should you need more. I just don't know how well the ECU will adapt. You might be able to get by with a S-AFC or similar tuning device, but again, I just don't know.

Then there's the exhaust. The stock manifolds might flow well enough for low boost, but might prove to be restrictive north of 8psi. Again, AMG manifolds can probably be swapped in here.

I've been reading the Mercedes forums a bit, but that hasn't proven to be too helpful. The friend of a friend I mentioned in a previous post actually worked on the Crossfire before its release. I guess he would know as much as anyone about the inner workings of the system and should prove to be a very useful source of information in my little project.

 

yeah the merc forums aren't real helpful. I posted about my little "head swap" topic over there to, and didn't even get one response.

 

Oh yeah, and if this things ends up working out and is easy and inexpensive enough to be duplicated, all those "i dont need anymore power guys" are going to start asking how they lived without it......hahaha. I really hopes this works out, good luck TSax

 

I own a 96 corvette LT-1 supercharged, it has 10.5:1 compression ratio. I'm pulling close to 9 pounds of boost and it is giving me an estimalted 480 horse. As mentioned above. The supercharging part insnt' a problem, the timing , the fuel and you definaltely need some sort of intercooling once you get above 5 pounds of boost. and a data logging software to check Air fuel ratios...

A quick rule of thumb for rough estimates...

14.7 + boost /14.7

14.7 + 8 /14.7 = 1.54

If you take the 1.54 * 215 horse you would get about 332

6 pounds of boost gives you a 1.40 * 215 = 302 horse. going past 6 pound you would need to go with larger injectors and possibly a new or accessory fuel pump.

If anyone has any other questions feel free to contact me...

my vette site www.ndneyes.com/mo

Mo