# KA24DE Cams **URL:** \ **Category:** SON240sx Automotive\ **Created:** [May 19, 2004, 1:09pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006 "2004-05-19T13:09:51Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 19, 2004, 1:09pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/1 "2004-05-19T13:09:51Z")
Well doing some research I found out that the Cams are different in the 1991 engine from the 1992 and 1993 engine. What I would like to know from someone with a 1991 FSM and a 1992 or 1993 FSM what the actual difference is. No electronic FSM’s please because who knows if they are a 1991, 1992, 1993, or 1994. They are all the same except for the cam page. The information can be found on page EM-52 looking Valve Timing Section “a” and “b” -Thanks ---
**Author:** ![jjm\_240sx](https://avatars.discourse-cdn.com/v4/letter/j/b77776/32.png) [@jjm\_240sx](https://forums.speedlife.net/u/jjm_240sx)\ **Post date:** [May 19, 2004, 1:45pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/2 "2004-05-19T13:45:20Z")
1993: A 240 B 248 it was EM-47 for me ---
**Author:** ![Axlerod](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@Axlerod](https://forums.speedlife.net/u/Axlerod)\ **Post date:** [May 19, 2004, 2:31pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/3 "2004-05-19T14:31:01Z")
I think the 91 has a 248/248. I can also tell you there is no noticeable difference. The 91 has a slightly more open top end… but for example, a 92 in better shape will have more power. If you are thinking of swapping… not worth the trouble imo. ---
**Author:** ![yashin](https://avatars.discourse-cdn.com/v4/letter/y/aeb1de/32.png) [@yashin](https://forums.speedlife.net/u/yashin)\ **Post date:** [May 19, 2004, 3:43pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/4 "2004-05-19T15:43:17Z")
I don’t think any year had 248/248, the only way to get this is to repin the exhaust cam off of a 91. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex034/uploads/speedlife/original/2X/b/b7170c8eddc0b95ece6b88172b2f416a08489a45.png) [@system](https://forums.speedlife.net/u/system)\ **Post date:** [May 19, 2004, 6:13pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/5 "2004-05-19T18:13:50Z")
I thought 91 cams were 240/248, and all other dohc cams were 232/232 ---
**Author:** ![yashin](https://avatars.discourse-cdn.com/v4/letter/y/aeb1de/32.png) [@yashin](https://forums.speedlife.net/u/yashin)\ **Post date:** [May 19, 2004, 6:18pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/6 "2004-05-19T18:18:25Z")
My understanding is that all s14 KA’s were 232/232. I’m not 100% but I think that all 91-93 KA’s are 240/248 Someone please clear this up ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 19, 2004, 7:06pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/7 "2004-05-19T19:06:55Z")
> [@yashin](#): > > My understanding is that all s14 KA’s were 232/232. > > I’m not 100% but I think that all 91-93 KA’s are 240/248 > > Someone please clear this up Well I know forsure all S14 Cams were 232/232 And I know forsure that all S13 1992 - 1994 cams were 240/248 But rumor has it that 1991 cams are differnt, both of them. I need this info from someone who has a 1991 FSM? ANYONE? ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [May 19, 2004, 8:08pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/8 "2004-05-19T20:08:32Z")
Missin that page ☹ EDIT i do not think the duration is any different it is the lift of the exhaust cam that does it 🙂 ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 20, 2004, 7:57am UTC](https://forums.speedlife.net/t/ka24de-cams/81006/9 "2004-05-20T07:57:52Z")
I though the lift on all DOHC motors was 42 but I could be mistaken. ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [May 20, 2004, 7:08pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/10 "2004-05-20T19:08:07Z")
> [@philip\_240sx](#): > > From a ‘paper’ version of the 1991 240SX FSM: > > Intake Duration: 240 deg > Exhaust Duration: 248 deg > Cam lobe height: 42.415mm > > I’m still not sure about the later year’s (92-94). I’ve read many conflicting bits of info. Well Philip if thats what it states then thats what it must be. So to clear things up all S13 Cams are 240/248 w/ 42mm Lift? ---
**Author:** ![Sm0ke](https://avatars.discourse-cdn.com/v4/letter/s/ce7236/32.png) [@Sm0ke](https://forums.speedlife.net/u/Sm0ke)\ **Post date:** [May 20, 2004, 9:53pm UTC](https://forums.speedlife.net/t/ka24de-cams/81006/11 "2004-05-20T21:53:21Z")
I don’t see why they would be different for 1991 compared to the rest of the s13 years. Rumors are rumors and to me have no point until PROVEN correct, and Phil’s FSM just reassures that they are the same. Unless of course you have a spare '91 cam around and are so inclined to measure the duration.