HKS 272 cam timing
Aug 31, 2006, 06:57 PM
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HKS 272 cam timing
I'm new to the forum. I bought pedalpushers very well built 03 EVO. Buschur short block, Buschur head, HKS 272, 680cc, S-AFC2, White Rabbit Turbo, Buschur Stages 1-4.
The car does not idle well, even had to add 20% fuel at idle, and still runs lean. Check out the cam timing picture attached.
Looks to me like +1/+3. Any suggestions on a good setting with these mods for a street car? -3/-3? Also, can anyone positively identify the brand of these cam gears? I believe they were bought from Buschur.
TIA,
Bob
The car does not idle well, even had to add 20% fuel at idle, and still runs lean. Check out the cam timing picture attached.
Looks to me like +1/+3. Any suggestions on a good setting with these mods for a street car? -3/-3? Also, can anyone positively identify the brand of these cam gears? I believe they were bought from Buschur.
TIA,
Bob
Aug 31, 2006, 07:27 PM
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those are fidanza cam gears, I have the same ones in silver, try setting them to -2/0 (-2 = exhaust cam gear which is closest to the front of vehicle)(0 = intake cam gear which is closest to the firewall)
This should help with the idle but you could possibly lose a little torque down low. I had my 280's set to 0/+3 and my idle was terrible, tried 0/0 and it was better but not great, then somebody suggested -2/0. Tried it and left it at that, have never looked back.
*EDIT* - stupid me had the i/e backwards
This should help with the idle but you could possibly lose a little torque down low. I had my 280's set to 0/+3 and my idle was terrible, tried 0/0 and it was better but not great, then somebody suggested -2/0. Tried it and left it at that, have never looked back.
*EDIT* - stupid me had the i/e backwards
Last edited by ries; Aug 31, 2006 at 07:54 PM.
Aug 31, 2006, 07:36 PM
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Originally Posted by ries
those are fidanza cam gears, I have the same ones in silver, try setting them to -2/0 (-2 = exhaust cam gear which is closest to the firewall)(0 = intake cam gear which is closest to the front of the vehicle)
I have the Buddy Club 272's which are suppossed to be identical to the HKS cams. I am set at -3I/-2E. Try checking all the timimng marks to make sure evrything is installed right
Aug 31, 2006, 07:38 PM
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Originally Posted by ries
those are fidanza cam gears, I have the same ones in silver, try setting them to -2/0 (-2 = exhaust cam gear which is closest to the firewall)(0 = intake cam gear which is closest to the front of the vehicle)
This should help with the idle but you could possibly lose a little torque down low. I had my 280's set to 0/+3 and my idle was terrible, tried 0/0 and it was better but not great, then somebody suggested -2/0. Tried it and left it at that, have never looked back.
This should help with the idle but you could possibly lose a little torque down low. I had my 280's set to 0/+3 and my idle was terrible, tried 0/0 and it was better but not great, then somebody suggested -2/0. Tried it and left it at that, have never looked back.
Aug 31, 2006, 07:39 PM
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Ries - firewall side is intake cam, radiator side is exhaust cam. This I am fairly confident about, as the exhaust manifold is closer to the radiator.
Do you have the torque spec for the Fidanza cam gears?
Testudo - are you sure that the exhaust is -3 not +3? If you imagine the outer gear being steady, turning the center clockwise advances the cam earlier in the cycle, which should be +.
Do you have the torque spec for the Fidanza cam gears?
Testudo - are you sure that the exhaust is -3 not +3? If you imagine the outer gear being steady, turning the center clockwise advances the cam earlier in the cycle, which should be +.
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Aug 31, 2006, 07:39 PM
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Originally Posted by cpoevo
You need to take another look at your engine. The intake cam is the one closest to the firewall and the exhaust cam is the one closest to the front. Obvious signs are intake manifold is against the firewall and the turbo, exhaust side is on the front of the engine.
I have the Buddy Club 272's which are suppossed to be identical to the HKS cams. I am set at -3I/-2E. Try checking all the timimng marks to make sure evrything is installed right
I have the Buddy Club 272's which are suppossed to be identical to the HKS cams. I am set at -3I/-2E. Try checking all the timimng marks to make sure evrything is installed right
Aug 31, 2006, 07:49 PM
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The cam settings shown are 0,+3. All engines run anti clockwise. Think you should run the car back at 0/0 like what the rest have said earlier, and try possible -1 or -2 on the intake and leave the exhaust at zero. The 272's seems to work best at 0/0 for allrounder.
Aug 31, 2006, 07:56 PM
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GTREVO - thanks for the confirmation on the cam timing. I was 90% sure it was +1/+3 or +0/+3 (hard to get an exact reading on the exhaust cam because of the angle of sight).
Honda B series and older still run counter-clockwise. I searched for "EVO cam gear" and found pictures of AEM cam gears. Must've been B series cam gears, as the "A" and "R" markings are opposite of what I had in my mind for the EVO. So, I thought I'd double check.
Honda B series and older still run counter-clockwise. I searched for "EVO cam gear" and found pictures of AEM cam gears. Must've been B series cam gears, as the "A" and "R" markings are opposite of what I had in my mind for the EVO. So, I thought I'd double check.
