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| Joined: | 05-01-2005 |
| Location: | Minneapolis, Minnesota USA |
| Posts: | 575 |
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What is the "wildest" cam spec's, heard of, for a racing 907 ? Thanks, roverman.There are a lot of aftermarket cam grinders offering street, rally & race cams for the 9XX engines. You'll just have to shop around. Start with Cosworth, Dave Bean, Dave Smith, Elgin Cams, Garry Kemp, Kent Cams, Paeco, Piper Cams, etc...
Note that "104" has become synonymous with "hot-street", and there are a number of aftermarket "104" cams available that don't match the factory specs for a Lotus 104 cam. Do your homework before buying.
For Lotus factory cams, it's:
Cam ID Part No ...... Old Part No ... Lift .... Duration.. MOP ......... Use
101 (C) F907E0101, C907E0351Z... 0.340 ... 272° .... 110° ......... 907 Lotus Fed & J-H
102 (D) G907E0102 D907E0351Z... 0.350 ... 270° .... 110° ......... 907 Lotus Euro
103 (E) J907E0103.. E907E0351Z... 0.344 ... 260° .... 102.5° ...... 907 Late & 911 Talbot
104 .... A912E0104 ...................... 0.420 ... 272° .... 104° ......... 912HC Lotus (Inlet only)
105 .... A908E0105 ...................... 0.433 ... 296° .... Per event... 911 Sunbeam Rally
106 .... A908E0106 ...................... 0.450 ... 320° .... Per event... Motorsport Cam
107 .... A912E0107 ...................... 0.378 ... 252° .... 104° ......... 911, 912 & 910
108 .... A908E0108 ...................... 0.460 ... 304° .... Per event... Motorsport Cam
101, 102, 103, 104 & 107 are Lotus street cams, used in series production engines.
105, 106 & 108 are Lotus Motorsport cams. Good luck getting your hands on one of them... it probably won't happen.
Cam Names:
The old letter names (C, D & E) come from the old Lotus part number's letter prefix.
The number names come from the last three digits of the new Lotus part numbers.
Last edited on 06-19-2014 05:45 pm by Esprit2