Originally posted by HighPSITalon:
A friend of mine has owned/driven Contours for a while now and has just recently purchased a used 99 SVT Contour with a few mods. He's interested having me install a Vortech on his new SVT. I'm not new the world of forced induction but he is and I don't think he understands why his 10:1 compression ratio scares me.

My questions are:
1) With the high CR on the 2.5L how long do the stock pistons last? Has anyone cracked/melted a stock piston yet at 8-10psi?

2) Does a SVT 2.5L have a knock sensor?

3) How long for an install time? Did it take the advertised 10-14 hours?

4) What is the CFM rating for this blower @ 8-10psi?

5) Anyone have any after install dyno numbers WITH wideband air/fuel ratios?

Thanks for your time!:)



1) A high CR alone does not crack/melt a piston, detonation does that. A proper a/f ratio for the fuel used will prevent that. A higher CR does make the potential of detonation much more likely though, it just makes the tune that much more important.

2) Yes.

3) Dunno for sure, since I don't own one, but from what I hear, significanttly longer than the advertised time, unless you are very familiar w/ the setup, and on a mission to complete it quickly.

4) Check Vortech's site for thier compressor map on the unit included w/ the kit, that should tell you more than I could in this limited space.

5) Can't help you w/ this one, but I would be interested to see them if you do find them.

Balance is the Key. rarasvt@comcast.net