Fabio421

I think you made the right choice.

Imo000

I tell you what...... if you can market the setup I have (feel free as I don't have any intentions to do so)....you will sell a buch for sure. I'll save you most of the R&D and will even provide you with scaled pictures of the suaprcharger mounting bracket. The rest of the build link is in my signature. If you can, let's say, sell them for $2500/kit and I think it's totally possible, it will sell like hotcakes. $2500 for a 400crank HP (~+110hp) is cheap and cheap sells.....as long as the quality is there.

Fabio421

Imre, I give you props for what you made. But most people want their A/C. Down here in FL we NEED our A/C.

Roy928tt

Fair dues, I'm sure it could be done.

I feel that any single turbo set up is going to be a compromise for response time and packaging within the engine bay. John Kuhn makes a perfectly good kit, nicely packaged with twins that honestly I really think fits the bill perfectly.

I chose to fabricate my own, and even then ended up with a slightly flawed design. Thats not to say I'm not happy with ther resultant performance increase, I still firmly believe Twin turbos are the way to go for horsepower augmentation in these vehicles.

Cheers Roy

entropy_engineering

The two pipes fit fine I've already done it. I'm not worried about response time too much. I've built other turbo cars (Mitsubishi, Bimmer, blah blah). Four cylinders are boost dependant just to pull decent. Incredibly fast boost response in first gear is pointless unless you have gumball tires and parts will be breaking. Again, please read slowly, my horsepower estimates are extremely conservative for justifiable reasons (I don't get on a forum saying, "I'm going to build this 1000hp car...). A 70mm turbo is borderline too big not too small. I read compressor maps like a chef with a cookbook. It is expensive. The output WILL trump SC kits; it's basic physics why. I still like the SC kits and am not flaming them. Easier to install, less expensive, I know. I'm a turbo addict with what I feel justifiable reason. I'm staying tight lipped on details mostly to keep from getting flamed on a forum. I will show more when I have proof. The twin turbo kits from Kuhn are phenomenal. I think I can do a 16 valve cheaper and better. Time will tell if I'm accurate. I don't like having turbo's where I can't see them or I'd buy a TT 300zx. I like taking 30 mins. to change mine. Lol for that matter I like opening my hood and feeling righteous (I swear my turbo looks back at me). Besides lower cost, I'm thinking about servicability and ease of upgrading. I agree that patenting is probably a waste of time. Noone else is dumb enough to try to pull all this off this cheap anyway probably. Anyone truly interested in details let me know I will post my heart out. Call me crazy, but I plan to severely break the dyno record for a 16 valve. I'm aware of the issues with oiling, block strength, etc.

Kevin Michael

I think you sound intelligent and capable. I too am a turbo guy at heart and didn't know a thing about SC's till a few years ago. There is NOTHING like the onset of hi boost from an exhaust driven compressor! Turbo'ing a 928 is extremely expensive and time consuming therefor I've never tried it. I am in the process of twinning a flat-six right now and so far I have maybe 3g's in it and 90% done. SC's for the 928's though!

entropy_engineering

Oh, I reponded to one person here wrong. The two pipes down the back DO fit round, but I have considered slightly ovaling (is that a word) the three inch one a little so their will be less heat transferred to the firewall. Part of my temperature measuring will be behind the fuse box. I hate melted fuseboxes. It's funny how much easier it is to snake that three inch pipe down with the fitting for the cold start injection removed. It's friday night no comments about my three inch pipe damnit! (It was cold that day)

RicerSchnitzzle

That's a tall claim. Love to see more details. I'm a big fan of high HP 16v's. I also want ot do a DIY boost set up soon. Giggle gas is fun but it not on tap like boost is. But with even 600 crank HP you still haven't caught several 16v's yet. With Meth injection, I plan on dumping a 300-350RWHP shot of giggle gas into my Hybrid 16v. I've run up to a 250RWHP shot with lots of retard and no meth up to now. That put's me about 550RWHP and north of 600hp at the crank under spray.

Shark Attack

I would like to see a kit for 1500-2000. I can not see putting a 7000.00 SC on a 3000 car. I had a discussion with the nice boy that has that turbo kit. I saw him last year at the PVGP. He was complaining he was not selling many. After some thought I came up with a few good points.
1. Most of the cars are not worth the amount of money people want for these kits.
2. You have a very small potential market.
3. A lot of people got into the 928 because they thought they were getting a "Bargain Porsche", This mentality is a little on the "cheap" side. ( no, not everyone and the people that are not already have a SC or turbo, Note, I dont have one)
4. The cars are slowly disappearing. Your market shrinks a little bit everyday.
5. You have some stiff competition already. People that know and love the cars.
In my opinion, for someone ( an unknown) to come in now and attempt to sell an SC or turbo kit is a very poor business choice unless you have something to offer over the current units. It is my opinion 928gt has the edge on performance. That other guy who just straps a pancake SC on the front has a little price advantage. I think it would take a HUGE price advantage to make a go of it. Best of luck. But I think you would be better off trying to mod the new mustangs.

entropy_engineering

You sir are correct. To safely say I set a record I need to jump up to 800ish at the crank or more. Now we're talking about epoxy filling parts of the block and all sorts of goodness. Can't wait to see what I do with the driveline.

Kevin Michael

Is there an advantage with the epoxy over concrete?

entropy_engineering

I agree the turbo kits are a poor financial decision. I just thought I might whip up a few more while I do mine. Their is a special industrial epoxy for aluminum. You mix in aluminum flakes with it. That gives the proper heat transfer rate. Concrete is too stiff and can crack a block. You fill the bottom inch and a half and let it try. You insert small tubes thru the drain holes so the water can be drained. Then, pour in hot paraffin unitl about three quarters or half an inch from the top and let it cool. Next, put the epoxy in the top and smooth it to just barely below the deck. When it's all dry take it to a machine shop to be hot-tanked to remove the paraffin. Oh, drill the water holes before the machine shop. I had a friend that did this to a Honda the held up into the high nines low tens before a cylinder split. Got a little respect back for hondas. His name was Joe Demaree and his car ran 8.64 at Nopi. The weld-in aluminum deck plates are too stiff and will crack the cylinders.

Fabio421

Good luck. I'd love to hear and see more details.

Imo000

Do you think this is the "original" twin turbo guy trying to post again here?

I do miss the days of the boosted arguments!

Fabio421

Nah, I still talk to him from time to time. I'm pretty sure that this isn't him.

The boosted arguments were good until they turned into real arguments.