adjustable cam gear explanation..
not unless you add a good cam to it. but on our cars i dont think so...like i said its for tuning. you can have it set so it works better in either low, mid or high rpm range. by that i mean how early or late the valves close helps in a different rpm range.
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Originally Posted by someguy
not unless you add a good cam to it. but on our cars i dont think so...like i said its for tuning. you can have it set so it works better in either low, mid or high rpm range. by that i mean how early or late the valves close helps in a different rpm range.
The real trick to using adjustable cam gears is to do the tuning on a dyno. There is no way you can do it otherwise. The HP gains are smaller than you can feel so unless you are going to dyno tune them dont even bother to put it on.
When the factories set up the initial cam specs, their #1 criteria is tailpipe emissions. Performance may be second or third behind fuel economy, but it is NEVER #1. With that in mind, an adjustable cam gear will let you dial in the cam timing for a bit more performance. It will give gains with a totally stock motor, just not very much. And not enough to justify the dyno expense if all you are doing is tuning the cam gears.
I have some dyno data of cam gears on an 01 LX with just a cold air. It picked up 2 HP on the top end. if anybody cares to see it, I can look for it and post it.
btw, the potential gains of adjustable cam gears on a stock motor are much increased if the motor is a DOHC because in addition to advancing or retarding the cams, you can split them from each other and that can help HP alot. Also, if you have lots of mods, then the stock cam timing will begin to really hold you back. If you have a milled head, them you have to have them or you cannot dial in your cam to it's proper location and "wrong" cam timing can kill your power in a hurry.
When the factories set up the initial cam specs, their #1 criteria is tailpipe emissions. Performance may be second or third behind fuel economy, but it is NEVER #1. With that in mind, an adjustable cam gear will let you dial in the cam timing for a bit more performance. It will give gains with a totally stock motor, just not very much. And not enough to justify the dyno expense if all you are doing is tuning the cam gears.
I have some dyno data of cam gears on an 01 LX with just a cold air. It picked up 2 HP on the top end. if anybody cares to see it, I can look for it and post it.
btw, the potential gains of adjustable cam gears on a stock motor are much increased if the motor is a DOHC because in addition to advancing or retarding the cams, you can split them from each other and that can help HP alot. Also, if you have lots of mods, then the stock cam timing will begin to really hold you back. If you have a milled head, them you have to have them or you cannot dial in your cam to it's proper location and "wrong" cam timing can kill your power in a hurry.
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From: NV
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I ordered a new aem cam gear (5 bolt revised model) which is going on along with timing belt/crank pulley/waterpump in a few months. Camgear is getting tuned after that as well.
Here it is. 3 runs at each setting, standard, 2 degrees adv and 4 degrees advanced. All 3 runs combined for an average then compared to the averages of the other 2 settings.
btw, this is the only type of dyno comparison that you should accept. You will notice the variation run to run without any changes made to the car! averages of multiple runs when testing small gain components are required.
enjoy
btw, this is the only type of dyno comparison that you should accept. You will notice the variation run to run without any changes made to the car! averages of multiple runs when testing small gain components are required.
enjoy
Last edited by Mirage; Jan 31, 2005 at 06:39 PM.
Originally Posted by koolaidman
hondas r interferience fit to much or too little...time for a new head
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Originally Posted by Mirage
true, but you have to be some kind of dumbshit to go +/- 20 degrees on a cam gear! typical best power numbers are going to be within 5 degrees of base.
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Originally Posted by Chris3k2
gearbox i thought u didn't like crank pulley's??? are u getting an aftermarket one or just replacing the oem??
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From: NV
Rep Power: 812 um well doesn't raising compression increase power? As long as the cam gear does something...even if it's just making the valves at the right distance.
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Originally Posted by gearbox
um well doesn't raising compression increase power? As long as the cam gear does something...even if it's just making the valves at the right distance.
LOL and where do i my blinker fluid
yes raising compression will increase hp and tq
but the valve timming will make the bigger difference...advancing - hp + tq retarding + hp - tq...dont remember whats what but that what it could do
if u really want to gain power
balance ur pistons
get a new head
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From: NV
Rep Power: 812 okay thanks man. My head is okay, it's been ported and polished, with hi flow valves. Just want to make sure the cam gear will be useful. And how do you balance the engine?
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Originally Posted by gearbox
okay thanks man. My head is okay, it's been ported and polished, with hi flow valves. Just want to make sure the cam gear will be useful. And how do you balance the engine?
ur better off gettin high compression pistons with total seal rings
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From: NV
Rep Power: 812 What other mods can I do to make the car faster? I don't want intake and exhaust cause all it does is make noise and no gains. About engine stuff. I've already done accessory pullies, pnp head, valves, iridium plugs, now the cam gear, and vafcII for tuning.
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Rep Power: 380 [QUOTE=koolaidman]take out the pistons and weight them and drill somewhere on the skirt to balance...
Hmmm your acting like balanceing an engine is easy. Its not that easy to completly balance and engine and is definatly not for the avergae person. you really should be fairly experienced in building engines and how they work. I mean its not like yeah just pull them out, drill a little and boom. It takes precise machine work to do it right. And you would also have to balance each lobe and lifter of the cam, make sure all the rods are the same. It's one hell of a process. and is definatly not cheap. but how is that pnp head cause im thinking of milling it 3mm and doing a pnp, what kind of gains did you get?
Hmmm your acting like balanceing an engine is easy. Its not that easy to completly balance and engine and is definatly not for the avergae person. you really should be fairly experienced in building engines and how they work. I mean its not like yeah just pull them out, drill a little and boom. It takes precise machine work to do it right. And you would also have to balance each lobe and lifter of the cam, make sure all the rods are the same. It's one hell of a process. and is definatly not cheap. but how is that pnp head cause im thinking of milling it 3mm and doing a pnp, what kind of gains did you get?
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Rep Power: 0 [QUOTE=ajhdragon] ya its calle blue printing...
Originally Posted by koolaidman
take out the pistons and weight them and drill somewhere on the skirt to balance...
Hmmm your acting like balanceing an engine is easy. Its not that easy to completly balance and engine and is definatly not for the avergae person. you really should be fairly experienced in building engines and how they work. I mean its not like yeah just pull them out, drill a little and boom. It takes precise machine work to do it right. And you would also have to balance each lobe and lifter of the cam, make sure all the rods are the same. It's one hell of a process. and is definatly not cheap. but how is that pnp head cause im thinking of milling it 3mm and doing a pnp, what kind of gains did you get?
Hmmm your acting like balanceing an engine is easy. Its not that easy to completly balance and engine and is definatly not for the avergae person. you really should be fairly experienced in building engines and how they work. I mean its not like yeah just pull them out, drill a little and boom. It takes precise machine work to do it right. And you would also have to balance each lobe and lifter of the cam, make sure all the rods are the same. It's one hell of a process. and is definatly not cheap. but how is that pnp head cause im thinking of milling it 3mm and doing a pnp, what kind of gains did you get?
