turbo performance Options

[nsyr]

I know there a few people out there with turbo 4's. Does anybody have any performance or reliability figures.

[fiid]

I think there is some truth to what my source is saying, although I don't think he's an expert on the topic.
Please bear in mind the the "keeping the heads on" problem is related to 12 or more psi of boost, which is quite a significant amount, and more than most people in this thread seem to be talking about. I am certain that lower boost pressures - 4-8psi can be run without too many problems, although that also means you aren't going to get giant horsepower.

Some people believe that the word turbo means 20psi boost, and to others it means no boost at all and atmospheric compensation (Read: so your performance doesn't go to crap in denver). Similarly, people have different ideas about what a good power output is.

I think you can make a 914 significantly quicker using a mildish turbo setup without too many problems. When you feel the urge to get the boost beyond 9ish psi, I think it will start to get difficult. This is all my opinion and is no way backed up by testing or real world knowledge - apart from the people having different ideas thing.

I wanted more than 200hp, and to never (or very rarely) do valve adjustments on my car. This, plus the cost of performance tweaks on the type IV engine (I have $1000 or so in my 1.7 already - just to get it running at a reasonable temperature and to get FI bugs worked out). means that a T-IV solution isn't going to work for me. I do ffeel bad about creating another hybrid, but I don't care about it as much as my local PCA does.

At least the Subaru engine is also derived from the Type I! So it shareas a great great grandaddy with all the porsche motors.