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Unit 5302 · 02-24-2006, 10:29 PM

I really doubt 1.7s are going to do anything for you. Those E7s may flow worse at max lift with the 1.7s than they would with 1.6s. The heads are just not designed with high valve lift in mind. Also, if you haven't changed the valvesprings, the 1.7s will exceed the maximum .500 lift your springs were designed to accomodate.

02-24-2006, 10:29 PM	#3
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Re: 1.6 rr's vs 1.7 rr's I really doubt 1.7s are going to do anything for you. Those E7s may flow worse at max lift with the 1.7s than they would with 1.6s. The heads are just not designed with high valve lift in mind. Also, if you haven't changed the valvesprings, the 1.7s will exceed the maximum .500 lift your springs were designed to accomodate.