turbo install, For the 3.0 Options

[iamchappy]

I am at this time considering a turbo install on my 3.0 engine, I would be using the guts of a used bae turbo kit for the 911sc. I know that I will have to do a lot of fabricating and loose some useable storage space in the trunk. I have enough support from those who have had the turbo kit installed on there cars for 20 years, and have sorted all the little problems out.
I now have to justify the need for 300hp, when my car runs great as is, but lacks a little heart pounding thrill.
I like the idea of turbocharging as it is all external, biggest hp gains without internal modifications, and I have the capabilites of fabricating the plumbling. Plus it can be done for less than a pair of carbs.
Someone twist my arm, it's a turbo or it's a new paint job for the car. (IMG:style_emoticons/default/confused24.gif)


Chappy

[Sammy]

All Porsche 930 turbos from 1976 thru the later part of the 80s had CIS injection and it works very well with boost.
Up to at least 5 psi a stock N/A CIS system compensates for boost with no other modifications needed. It is after all an air flow sensored system that adjusts for air density and temperature by design. The stock CIS injection on a 3.0 is said to be capable of supporting well over 300 hp.
The reason for the extra injector is not so much to prevent a lean out but more to provide "extra" fuel as a safeguard and to aid in cooling. I could dial the CIS so that it would maintain at least 13 to one at 7# boost, but with a compression ratio of over 9 to one and the crap they call pump gas now days I would feel better having it down around 12 to one while under boost. I know that's a little too rich but it is also safer for the motor.

IMO a DIY fuel injection "kit" is much, much more prone to an OOPS than CIS with an extra injector.

Same goes for aftermarket fuel injection systems. They work great after they are dialed in and the bugs are out, onlyest problem is those bugs can fry an engine before they are sorted out.

To me the CIS route makes much more sense. It's been done many thousands of times with turbocharging.

When the same thing can be said about megasquirt I'll buy it.
I know of two people who have installed megasquirt on a Porsche and have it dialed in. Sure there are more but I only know of two. Neither of the cars are turbocharged.

This megasquirt thing is all fine and dandy but it seems like there are way more people talking about it but very few doing it. I'm a little sceptical. I also don't have time to go around re-inventing the wheel. If I have something that doesn't work I look for a better solution. If I have something that works very good I look for something else to worry about (IMG:style_emoticons/default/beerchug.gif)