Home Made Supercharger?? Need Advice

[sabbath]

I posted over on the list. Trying to figure out what the deal is with this thing:

Home made supercharger someone posted on 924:
http://www.924board.org/viewtopic.php?p=120595#120595

I posted on the list, some people say its the real deal?
http://forums.rennlist.com/rennforums/showthread.php?t=208763

I emailed the guy and got some information that I posted, but I am just having trouble sorting this all out. Real, fake, etc... I have trouble getting around the math and concept. Opinion so far seems to be its the real deal... but I mean how do you build such a thing in your garage? I have seen the cut aways of various superchargers, gears, bearings, pulleys, seems very complicated.

Not only that the guy seems a little less than friendly in his reply to me.

Can anyone comment on this? Math? Details..? I mean it sounds like this Home made thing could work on anything of less than V8 in size? Could this be a cheap solution?

[Wolf1]

Yes, it can be done. In fact it has been done before. The question with turbo's retro'ed to belt driven s/c is longevity. If a proper nose support is designed to handle the load applied by the belt and the gearing is adequate it works fine.

However, Paxton, Vortech, and ATI offer head units fairly cheap and all you need to fabricate is the brackets. Or used head units can be bought on Ebay for even less. Now what you do for fuel, timing and detonation control is up to you. And no matter what type of power adder you use you will have to contend with this.

Can it be done???? Absolutely.

[bigyagi]

fitting one in your vehicle, is not the main problem. as wolf 1 says, its all about the correct fuelling, and timing, and avoiding detonation. you could spend lots of cash getting a viable management system. almost anyone with an engineering background, and access to machinery, is capable of building a supercharger/turbocharger. the trick is management.
i notice also that most aftermarket supercharger kits, because of the placement, means that you have to remove your a/c system. not good in my location!.
now, getting two people involved in this project, one for the s/charger, and the other for the management system would be a great project!
i read this post because i work in engineering, and i'm always interested when someone comes up with something like this, that if done correctly, would give yet another "boost" to the low power n/a. at, hopefully, a reasonable price! interesting!
bob.

[sabbath]

Well from what I gather he has the fuel delivery issues covered.

From the dyno runs, apparently he didnt exactly blow up the engine.

I gather that he has solutions for both the DME and CIS systems. In fact I read a post where he apperently has his own EFI conversion setup for both the 2.0 and 2.5. I gather that his kit will be complete and less than other kits on the market.

I am still unsure, but if it works as well as it seems and its as cheap as he claims... this could really end up being something for the NA owners....

[PhillysMostWntd]

i know if it costs anything between the 2-3k range im sold

anything below that and... ill have to buy another 944

[bigyagi]

hey sabbath, thanks for bringing a very interesting post. i look forward to seeing if a kit becomes available, and maybe reading a review, when someone does fit it!
bob.

[Brando]

LMFAO...

Originally posted by FR Wilk
Do not try this at home. He is a professional!

[Rmills944]

It's a hard kit to make, but it can be done!

[PhillysMostWntd]

lmao, supercharger in a box?.. er supercharger is a box? you guys are too harsh, i know im gonna buy a kit if he makes one.. and they dont cost to much

[my924gtc]

Since I am the 'other half' of the SC development team on this I'll clear up a few things...

If someone working on something like this seems 'unfriendly' it is because not everyone here (or on "the list") can be trusted, and some people like to use guys like us to figure things out for them, and then they make their own system. Which is fine but do not expect me, or my partners, to hold your hand while you do it.

Also, let me say this...it is real, it is going to resolve a bunch of debates, and it will be half the cost of other SC kits on the market.

The 2.0L kit will be ready for testing in a month or so, the 2.5L kit will be available for sale around the same time. Look for the website to launch sooner than that.

[bigyagi]

well, congrats to you and your fellow partner. i'm sure that there are many people just waiting to see your product hit the streets. i'm certainly interested in your project. i have to admit that i do copy other ideas, that i find, such as klain ind. they have a neat sway bar bracket , that for me , is easy to make. also, a strut brace. i'm not going to get involved in making such a project, like yours, as i dont have the time, and as far as engine management systems go, i'm not even in the game, but if your system comes to fruition, then i'm interested!
its refreshing to see someone get up and do it!
regards, bob.

[my924gtc]

bigyagi - thanks for the interest and the encouragement.

I see that you are Windsor, just across the river from me (well I'm a good hour outside of Detroit) but still close enough to come see the system once it is complete.

Keep in touch, and maybe the next time we get the SE Michigan Porsche guys together you can make a commute to join us.

To all interested in affordable power: Look for the website to be made public soon, and all the goodies to be there.

[CJFusco]

This is very interesting. I currently have the 'more power' itch, and this seems like a very reasonable solution.

Please keep us posted.

[bigyagi]

my924gtc, thanks for the offer! i would jump at the chance to view your system, once its up and running. nothing like "hands on" to get a feel for something like this. i know the 928 guys meet in royal oak 3rd thursday/month, but always looking to meet other enthusiasts/drivers in detroit/windsor area! look forward to your site!
regards, bob.

[CJFusco]

by "928 guys" do you mean the guy with the yellow 928 that has a huge blower sticking out of the hood?

[my924gtc]

Originally posted by CJFusco
by "928 guys" do you mean the guy with the yellow 928 that has a huge blower sticking out of the hood?

Not sure about that, but there is a group of 928 owners in SE MI that get together via the 928 board on the list.

FWIW One of them does have a 75 shot of NOS installed on his 928 though. I have yet to make it to this gathering but met him Memorial Day at a BBQ GTG.

[sabbath]

So your the other half... hemm care to clear any of this up? I understand you can't walk me threw building one or some such, but what about bearings, gears, pulleys, heat, fuel delivery, durability, a lot of unanswered questions and of course my biggest one "How is that some can build one of these in their garage?"

The math alone and pulley size to turbo wheel size, air flow, surge, etc... its a lot to swallow. I get that procharger, powerdyne, paxton, rotrex, vortech all built units, but the only one that looks like a turbo is the rotrex. It's just hard to swallow and seems like it made a lot of power on a 944 for a home made anything. That can't be a stock 944 it was tested on.

I am not the only one thats skeptical and some people even think its total BS, your are saying its not? I dont care if it takes 3 months for you to bring it to market, I will be impressed to see it on the market.. I would love one for my car... but if its cheaper to buy, does that mean it will be cheaply made?

[my924gtc]

sabbath: you said it yourself..."it is a lot to swallow" That is engineering for you.

Show me one of your skeptics that has actually done anything remotely like this and I will be happy to hear his arguement. Since countless other individuals have boosted and customized their 2.0L and 2.5L cars so it should be fairly simple to find one to undermine our processes. But if what you call a skeptic is actually someone who is merely confused by mathematics and physics then I prefer not to read what they have to say.

To be honest I did not want this to even be mentioned on the forums until it was done. I prefer to work in peace, and not have to explain things to people while I develop them. Doubles the work load.

Bottom line here is we build things for ourselves and our race cars. If, when we are satisfied with it, people want us to build more we will. We will have a website just like everyone else and it will have specs and data galore so you feel warm and fuzzy about buying the supercharger kit. I will not put any numbers out there before I am satisfied with our system though.

Performance cars are funny...you can tell people what you are doing, or you can show them what you have done. I prefer the latter.

Thanks for the interest guys.

[sabbath]

well atleast their is some intellignet commentary on this board.. the guys on the 'list dont have much to say.

I appreciate you atleast responding. I get the idea of boosting a car, I have a turbocharger in my ranger. So no issues their, its the homemade and the low price that wows me. I am sorry if I sound like I am putting it down or letting the cat out of the bag. I saw it on the 924.org site and wanted to get other people to comment outside of that group... just seems like to good to be true. I am sure you guys are doing some serious stuff, I am excited about the possibilities for my 924S but still skeptical. Sorry if that sounds like half the people on the 'list or something.

Guess I will put a cork it in, sure wish other people would have talked about the concept and possibilities... maybe thats better left for talking over with a group of friends and some cold beer.

[sabbath]

OF course FR WILk and others didnt help much... lots of joking, pics... funny yes, but still where is the meat of a good debate instead of pointless jokes that dont help.

I was hoping to get into the meat, like do I keep my AC? I guess I just have to wait.