Quote:
Originally Posted by diss7
Some okay information there, but left out some key points.
In the example comparing the avo kit at 8pai at different static compressions, the one at stock compression will be much more responsive and nicer to drive. Both on and off boost.
Another argument is that, why not just run ethanol? If it's not available in your area, but it in buy the barrel and keep it in your garage. Have a pump map, and a ethanol map.
You're not using more than 300whp on the street anyway. If you think you are, you probably have TRC on and don't realise that you're not actually using all the power.
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I'd have to disagree on both those points unfortunately.
Not many people want to be rolling barrels of fuel in and out of their garage and refueling like that. I don't have ethanol available, and quite a few places don't (sadly).
As for static compression, I disagree. High compression and running boost is just asking for trouble
ESPECIALLY running e85 where the blends change. You have no idea how many engines I've seen go because tuning on e85 with the blends changing throughout the seasons causing knock and detonation. Running a static 12.5:1 engine with an 8psi turbo running 19-20 compression ratio at full boost is a dangerous game IMO
On top of that, most of the available turbos are so small that they spool EXTREMELY quickly. You wouldn't notice any lag or difference whatsoever. Now, if we're talking some HUGH turbo then yes, but you would have to have lower compression pistons to do that anyways.
Also, using fuel power on the street, I always use full power lol What's the point of having it if you're not using it? haha
Ultimately, these internals are customizable as well and one does not have to go as low as 9.0:1 either. I just used some basic ideas to convey their use. They're even useful in N/A applications. I was just trying to make a point.
IMO, this car needs a turbo. I've driven many and the FI are totally a different beast. It just seems right. Now, on a stock engine that is 12.5:1 non-FI from the factory, that's pretty sketchy so enter aftermarket internals. You can keep boost lower for quick spool and good response with a smaller turbo like the AVO for example, but keep the full boost compression in a much safer zone also allowing you to potentially use non-93 octane (but always ideal for FI).