SPOHN'S Journal II Track Demon Reborn

Megan370z · 06-03-2013, 11:29 AM

Quote:

Originally Posted by Sh0velMan

Well, maybe you can measure the primary size and report back? I head always hard they were 1 5/8ths primaries, which IMO is a bit small.

The PPE's and momentums are (at least) 1 3/4. I know that seems like a small difference, but small changes like that make big differences.

That and I'm not crazy about the FI's collector design.

yeah me too I was told it was 1 5/8 on the PPE but after mesuring it it was in deed 1 3/4 steped to 1 7/8 ( all Outside Diameter )
there was probably a confusion at Inside and outside being told
since 1 3/4 OD is 1 5/8 ID .....

being steped to 1 7/8 from 1 3/4 will result in a slightly better breathing at HIGH Rpm (6000+) but at the cost of a very small lost in the lower powerband.

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