Yea, I already did the 248/248 cam setup and personally it drives okay but is amazingly slow in the low rpms...FEELS like crappy V-tec. But yea Im going to do the intake cam swap...I believe replace both of my cams with the intake cams. Im running a 1992 Nissan 240sx with a KA24DE.
How many teeth must I rotate on both? Or just the exhaust.
Oh when I do the cam swap must I also get a timing gun and adjust my timing? And how much do I advance or retard?
240/240 CAM SETUP HELP. AND MORE
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Silvia_Freak
- Posts: 203
- Joined: Mon Mar 21, 2005 3:21 pm
- Car: 1992 NIssan 240Sx KA24DE
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DjPantsSpecR
- Posts: 1711
- Joined: Fri Jan 14, 2005 12:49 pm
- Car: 93 Nissan MS13
92 Nissan RMS13
okay. i'll start out by saying that 240/240 sucks. something jsut isnt right with it, and 240/248 is better, but its up to you to try it.
im gonna assume you have little to no bolt ons too, becasue that measn losses everywhere with 248/248.
but to get 240/240 to work, you set up the intake cam like normal, because it is a normal intake cam. makes sense. then to make a 240 into an exhaust cam you must rotate it 4 teeth clockwise. CLOCKWISE. you'll know you've done it right becasue your cams will face pretty much directly away from each other.
you dont have to adjust your timing. honestly, ive never put my 240 under a timing light, i just know where it feels right to me, adn i adjust accordingly. however, with 240/240 i would use base timing, then advance a few degrees if you want some more top end.
now, im going to crunch some degrees wheels and i'll write something else later to people looking to try 240/240 with an adjustable cam gear.
im gonna assume you have little to no bolt ons too, becasue that measn losses everywhere with 248/248.
but to get 240/240 to work, you set up the intake cam like normal, because it is a normal intake cam. makes sense. then to make a 240 into an exhaust cam you must rotate it 4 teeth clockwise. CLOCKWISE. you'll know you've done it right becasue your cams will face pretty much directly away from each other.
you dont have to adjust your timing. honestly, ive never put my 240 under a timing light, i just know where it feels right to me, adn i adjust accordingly. however, with 240/240 i would use base timing, then advance a few degrees if you want some more top end.
now, im going to crunch some degrees wheels and i'll write something else later to people looking to try 240/240 with an adjustable cam gear.
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DjPantsSpecR
- Posts: 1711
- Joined: Fri Jan 14, 2005 12:49 pm
- Car: 93 Nissan MS13
92 Nissan RMS13
Re: (DjPantsSpecR)
im still pretty skeptical about your theory on the coolant temp sensor.
i understand where you are comming from, you are trying to say that it is falsely telling the ecu that it is running hot, thus the ecu uses the strategy burning way rich to lower cylinder temps. but i do believe this is highly unlikely based on the fact that an ecu of older vehicles like this isnt likely to use this sort of strategy, and secondly that is only one of MANY possible scenarios.
i also have the same problem with mine (91 ka24de), and my temp gauge itself is fine, always has been. no engine light or false codes show with a scantool.
i understand where you are comming from, you are trying to say that it is falsely telling the ecu that it is running hot, thus the ecu uses the strategy burning way rich to lower cylinder temps. but i do believe this is highly unlikely based on the fact that an ecu of older vehicles like this isnt likely to use this sort of strategy, and secondly that is only one of MANY possible scenarios.
i also have the same problem with mine (91 ka24de), and my temp gauge itself is fine, always has been. no engine light or false codes show with a scantool.
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DjPantsSpecR
- Posts: 1711
- Joined: Fri Jan 14, 2005 12:49 pm
- Car: 93 Nissan MS13
92 Nissan RMS13
well if youre skeptical, i welcome you to be, as you should.
the only way to tell if this is true, and your KA just isnt in horse**** shape, is to go out, and unplug the CTS.
im not telling you to buy anything, im just saying, because ive had this problem, you can go out and unplug your CTS, drive it around, let it warm all the way up to temp.
if your car isnt really slow, except a burst of power at around 5500 rpms, then your CTS is probably fine.
or you can spec it with a multimeter
im not saying its telling the ecu anything, im saying its behaving as an out of spec sesnor, and the ecu switches fuel maps. a guy on zilvia or FA had a dyno showing the losses from having / unplugging the CTS.
and i dont think the scantool would fine the cts, and the cts is different than the temp gauges sensor, they sit right next to each other.
so i pointed out a very common problem, that i too have had experience with, and its very easy to test out/ cheap to replace/ easily searchable.... so you really cant complain
the only way to tell if this is true, and your KA just isnt in horse**** shape, is to go out, and unplug the CTS.
im not telling you to buy anything, im just saying, because ive had this problem, you can go out and unplug your CTS, drive it around, let it warm all the way up to temp.
if your car isnt really slow, except a burst of power at around 5500 rpms, then your CTS is probably fine.
or you can spec it with a multimeter
im not saying its telling the ecu anything, im saying its behaving as an out of spec sesnor, and the ecu switches fuel maps. a guy on zilvia or FA had a dyno showing the losses from having / unplugging the CTS.
and i dont think the scantool would fine the cts, and the cts is different than the temp gauges sensor, they sit right next to each other.
so i pointed out a very common problem, that i too have had experience with, and its very easy to test out/ cheap to replace/ easily searchable.... so you really cant complain
Re: (DjPantsSpecR)
i get some of what your saying, but if it were out of whack then i would be burning richer. which i am not.
and you know what i meant when i said that the sensor would communicate the problem, just not all that familiar with how it does it yet in these old nissans.
i think my problem err.... discovery would be pulling off the cover and checking cams. i believe my case is i may have aftermarket cams of some sort, being that i nearly hung with an is300 the other day... which if it is the case i might need help identifying cams :s
Modified by ka24dave at 1:38 PM 11/6/2006
and you know what i meant when i said that the sensor would communicate the problem, just not all that familiar with how it does it yet in these old nissans.
i think my problem err.... discovery would be pulling off the cover and checking cams. i believe my case is i may have aftermarket cams of some sort, being that i nearly hung with an is300 the other day... which if it is the case i might need help identifying cams :s
Modified by ka24dave at 1:38 PM 11/6/2006