Originally posted by Lance Kinley:
Originally posted by SVT PETE:
Originally posted by Lance Kinley:
One reason might be that the E0's were only single-pass extrude honed. The second pass done on E1's and later does open up the runners a fair bit.
Incorrect!
Discussed thoroughly when the Extrude Hone Group Buy came about.
To summarize, all SVT UIMs were passed the same number of times - same flow for 98, 99 and 00.
Confirmed by Extrude Hone and Terry Haines. I also took measurements of all runners between a 98 UIM and a 00 UIM and there was almost no difference between the two in the measurements.
Ok, so the whole 'dual hone' bit a while back was a crock?
-Lance
As discussed in this thread...
Rick Miller of Extrude Hone - all SVT UIMs are the same.
Rick Miller Voicemail
Terry Haines -
The 5 extra horsepower is a result of:
- later heads being ported, early not
- later heads have a revised/added intake port hone
- .25 compression ratio increase in later years
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