Exhaust Cam Modification
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Joined: Aug 2006
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Vehicle: 2001 hyundai tiburon
intake cam have a cam sensor , not the exh cam
exh cam have cam gear and a cam sproket , the intake cam only a cam sproket
So it will cost you less to buy a cam gear a do the modifiation you whant
exh cam have cam gear and a cam sproket , the intake cam only a cam sproket
So it will cost you less to buy a cam gear a do the modifiation you whant
Thread Starter
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Joined: Jun 2007
Posts: 225
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From: Costa Rica
<div class='quotetop'>QUOTE (daoust @ Aug 24 2007, 01:55 PM) <{POST_SNAPBACK}></div><div class='quotemain'>intake cam have a cam sensor , not the exh cam
exh cam have cam gear and a cam sproket , the intake cam only a cam sproket
So it will cost you less to buy a cam gear a do the modifiation you whant</div>
Yes, but you can take the cam sensor from an intake cam and eliminate the cam gear of the exahust...
exh cam have cam gear and a cam sproket , the intake cam only a cam sproket
So it will cost you less to buy a cam gear a do the modifiation you whant</div>
Yes, but you can take the cam sensor from an intake cam and eliminate the cam gear of the exahust...
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Joined: Nov 2001
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Hey Mauricio, how are things going!
I missed this thread when you originally posted it... it can be done, as a matter of fact, it is a pretty common mod in Korea, this is something they do to get a more agressive intake cam for a bargain price.
I myself was about to do it, the only reason I didn't is because the guy who was getting it for me in Korea disapeared (fortunately I think because he was later involved in a scandal for not getting the parts he promissed) and because he never confirmed if modification to the ECU was mandatory or if it could still run with OEM Ecu.
I don't know the details on how this is done, the position sensors and all, but it's do-able.
Si lo haces pasa la voz de cómo hiciste y comparte la experiencia!
I missed this thread when you originally posted it... it can be done, as a matter of fact, it is a pretty common mod in Korea, this is something they do to get a more agressive intake cam for a bargain price.
I myself was about to do it, the only reason I didn't is because the guy who was getting it for me in Korea disapeared (fortunately I think because he was later involved in a scandal for not getting the parts he promissed) and because he never confirmed if modification to the ECU was mandatory or if it could still run with OEM Ecu.
I don't know the details on how this is done, the position sensors and all, but it's do-able.
Si lo haces pasa la voz de cómo hiciste y comparte la experiencia!
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Joined: Feb 2007
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Vehicle: 1999 Hyundai Tiburon SE
ahh.... i was going to post after I had it installed - I did this a couple months ago to a spare exhaust cam i have laying around I just have not installed it yet - I thought I would be the first one. mad.gif
I'll try and post pics later.
I'll try and post pics later.
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Joined: Nov 2001
Posts: 1,269
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Hey you had it all kept for yourself!
But you are not the only one who knew the secret... nana.gif
Well guys, this would probably be the cheapest performance intake camshaft we can get (bang for the buck I mean) or you could pay the $400+ for a brand new 268+ cam....
When I changed from the OEM 2.0 cam to the 1.8 cam the difference was really noticeable, specially after 3000rpm; and it was +8° duration and +0,4mm lift, I know performance increase is not linear and there are other factors, but changin from the 1.8 cam to the exh-->int cam would mean an additional 8° duration and 0,6mm more lift; so I guess this would be again something super noticeable? (Well, for you guys with the OEM 2.0 cam, the difference would be day and night because you would be gaining 16° duration and 1mm lift...)
Do you know if it needs ECU programming changes? I know it is better to do it, but supose you don't have the abilities/facilities to do it; can you still put this cam and benefit from it?
(I guess I am going to be able to still get away with it; as I have mentioned before my Ecu is a factory Siemens with open loop; no cat, no O2 sensor, so basically the Ecu timing and fuel maps are preset at factory levels and it keeps them regards of emissions).
Maybe this question is for Mad_john.... if you change pistons for the 1.8 pistons, can you still use this camshaft? (Because our engines are interference engines, however I suspect tolerances are not as tight as we first thought as to not permit 1mm more lift with slight advance...)
But you are not the only one who knew the secret... nana.gif
Well guys, this would probably be the cheapest performance intake camshaft we can get (bang for the buck I mean) or you could pay the $400+ for a brand new 268+ cam....
When I changed from the OEM 2.0 cam to the 1.8 cam the difference was really noticeable, specially after 3000rpm; and it was +8° duration and +0,4mm lift, I know performance increase is not linear and there are other factors, but changin from the 1.8 cam to the exh-->int cam would mean an additional 8° duration and 0,6mm more lift; so I guess this would be again something super noticeable? (Well, for you guys with the OEM 2.0 cam, the difference would be day and night because you would be gaining 16° duration and 1mm lift...)
Do you know if it needs ECU programming changes? I know it is better to do it, but supose you don't have the abilities/facilities to do it; can you still put this cam and benefit from it?
(I guess I am going to be able to still get away with it; as I have mentioned before my Ecu is a factory Siemens with open loop; no cat, no O2 sensor, so basically the Ecu timing and fuel maps are preset at factory levels and it keeps them regards of emissions).
Maybe this question is for Mad_john.... if you change pistons for the 1.8 pistons, can you still use this camshaft? (Because our engines are interference engines, however I suspect tolerances are not as tight as we first thought as to not permit 1mm more lift with slight advance...)
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Joined: Jul 2007
Posts: 43
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From: Orlando
2.0 exhaust cam swapped for the intake, and another exhaust in the regular exhaust cam location or 1.8 litre exhaust cam in intake locaiton.
i know HOW to make it work, i just wanna make sure it WILL work and what model cam i need.
thanks
awsome thinking, mad peops to you.
i know HOW to make it work, i just wanna make sure it WILL work and what model cam i need.
thanks
awsome thinking, mad peops to you.
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Joined: Feb 2007
Posts: 763
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Vehicle: 1999 Hyundai Tiburon SE
Ok, I snapped a couple pics last night. Its really simple to do - drill a hole behind the magnet in your intake cam like so:
Tap the magnet out with a hammer and punch.
Then, chop the end of your spare 1.8L or 2.0L exhaust cam. I was worried this would be dificult if it was hardened, but it sliced like a piece of cake. Just use a bandsaw or electric hacksaw (or a hand hacksaw if you have a lot of time on your hands). Drill a hole 1/4" that lines up with the last lobe on the cam. (i used a 15/64, but my bit was bent slightly. You want this hole to be tight) Drill all the way through so if you ever need to get the magnet out you can.
Then just tap the magnet in so it sticks out the right amount. (you measured your intake cam with a caliper when you did this)
sorry for the really bad pictures, I had some good ones but I couldnt find them so I snapped a few quick ones with my wifes digicam.
Tap the magnet out with a hammer and punch.
Then, chop the end of your spare 1.8L or 2.0L exhaust cam. I was worried this would be dificult if it was hardened, but it sliced like a piece of cake. Just use a bandsaw or electric hacksaw (or a hand hacksaw if you have a lot of time on your hands). Drill a hole 1/4" that lines up with the last lobe on the cam. (i used a 15/64, but my bit was bent slightly. You want this hole to be tight) Drill all the way through so if you ever need to get the magnet out you can.
Then just tap the magnet in so it sticks out the right amount. (you measured your intake cam with a caliper when you did this)
sorry for the really bad pictures, I had some good ones but I couldnt find them so I snapped a few quick ones with my wifes digicam.