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 Posted: 06-21-2019 01:34 am
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Esprit2

 

Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 512
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LOTUS Cam ID . . . C . . . . . . D . . . . . . E . . . . . . . . 107 . . . . . 104
Marking . . . . . . . . None . . . 1 Groove . 2 Grooves . . 7777 . . . . 4444
Lotus Lift (inch). . . 0.340" . . 0.350". . . 0.344". . . . . 0.378" . . . 0.420"
JHPS Lift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.387" . . . 0.428" (what else is different ?)
Delta Motorsports'. . . . . . . . . . . . . . . . . . . . . . . . . . 0.361" . . . 0.416" (what else is different ?)
Int. Opens, BTDC . 26°. . . . . 25° . . . . . 27.5° . . . . . 22° . . . . . 32°
Int. Closes, ABDC . 66°. . . . . 65° . . . . . 52.5° . . . . . 50° . . . . . 60°
Exh Opens BBDC. . 66°. . . . . 65° . . . . . 52.5° . . . . . 50° . . . . . 60°
Exh Closes ATDC. . 26°. . . . . 25° . . . . . 27.5° . . . . . 22° . . . . . 32°
Overlap . . . . . . . . 52°. . . . . 50° . . . . . 55°. . . . . . . 44° . . . . . 64°
Duration. . . . . . . . 272°. . . . 270° . . . . 260°. . . . . . 252°. . . . . 272°

Besides lift, what else about the JHPS & Delta versions of the 104 & 107 cams is different from the Lotus versions? Lotus coined all the original cam names. For JHPS, Delta, or any other cam grinder to use the same names without clearly noting any differences only adds confusion. That's not a 'service'.

Regards,
Tim Engel

Last edited on 02-01-2020 10:05 pm by Esprit2