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raceman raceman is offline
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Join Date: May 2004
Location: washington,DC
Posts: 1,087
Hmmm,you seem set on using the high-comp pistons for some reason. l`m guessing you hope your off-boost performance will be better with the 10.5`s? On paper that may be true but the reality is that your car will be much faster when you can dial the boost up and that will only happen running a lower compression ratio. My 3.2 running stock pistons gets full boost before 2000rpm, l seriously doubt l could expect noticably better performance with the euro-pistons. l had a chance to buy a set of the 10.5`s and l passed for one reason- l intended to boost the car. lf you truly intend to turbo your car the bottom line is that 10.5 pistons are the worst choice you could make for the pistons.The stock pistons will work but why bother? you`ve got the motor apart ,do what any experienced builder would do when building a turbo motor: install FORGED turbo pistons with a lower compression ratio. The 3.2stock cast pistons tend to break the ring lands under excessive boost, a far greater fear with the euro 10.5`s. While you have pistons out send them to Swain-tech for coatings
http://www.swaintech.com/ you`ll be glad you did. l realize not everyone has $10-k laying around to spend on a motor which is probably the best reason yet not to use high-comp pistons in a turbo build. Some people report detonation using the euro slugs with our gas,imagine how they are under boost...
Old 02-10-2008, 11:26 AM
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