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| 10 Degree Advanced Camshaft Pulley | |
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| Tweet Topic Started: Nov 4 2009, 09:55 AM (6,121 Views) | |
| Hilltopcycleatv | Nov 4 2009, 09:55 AM Post #1 |
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Has anyone ever installed a 10 degree advanced timing sprocket/pulley onto a stock cam ? What was the result ? Thanks, |
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| Cobb | Nov 4 2009, 10:25 AM Post #2 |
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BANNED
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In the famous words of Tim Allen, MORE POWER!!!!!!!!!! I have no idea on fuel economy, but doing 70+ and getting 43mpg cant be bad, but my car was also lower half a coil as well. Keeping it under 70mph, I got 47mpg. I am sure if I kept it at 60 or less it would break 50mpg. Id do it, its the best 40 bucks you can ever spend for a new performance part on your car unless you get a used mos system in working order. |
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| Hilltopcycleatv | Nov 4 2009, 11:17 AM Post #3 |
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Where do i get one ? |
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| Hilltopcycleatv | Nov 4 2009, 11:19 AM Post #4 |
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I am just thinking I should change the timing belt as I don't know when it was last changed and figured while I was in there I might as well do this if it made a difference . But I am more interested in MPG than power. Anyone have any input on MPG ? Thanks, |
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| Bad Bent | Nov 4 2009, 11:57 AM Post #5 |
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Facetious Educated Donkey
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Click on this: 3Tech. My understanding, in short, is that the cam gear advances timing of the opening and closing of the valves. Granted your timing is still 8 deg. BTDC; the +10 will open/close the intake a few milliseconds sooner and thus allow for a little more compression. The same goes for the exhaust valves. It will not change the duration of the valve timing which would allow more/less air/fuel in. For better gas mileage you would want 3Tech to mill you a cam for "economy." My Wife has the "econo" cam and she can drive all day at 1500 rpm in 4th or 5th with power. Johnny Mullet has one. I mention this ONLY because you have to take the valve cover off to get the cam gear bolt off. You'd lock the cam by inserting a rod/screwdriver through the cam to lock it. If you have the valve cover off it takes removing 6 more bolts to remove the cam. That's all. Oil the new cam and evenly torque the 6 bolts to 97 inch pounds or get a deep socket and torque wrench. The cam gear bolt is torqued 44 ft. lbs. IMHO well worth the extra money if you want great MPG and intend to keep the car for years. 3Tech may do a gear swap, depending on what is in stock. The trick on gas mileage will be keeping your foot out of it as Cobb suggests. However, it will act more like a well tuned 4 cylinder engine, which the 3 cylinders are more than capable of. |
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| Hilltopcycleatv | Nov 4 2009, 05:09 PM Post #6 |
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Like most others on here, I am out to get MPG . I am getting 46mpg average per tank right now with a 00' 3/5 . If I got the economy cam and pulley what would be my gains ? I have accomplished the 46 with the help of a Scan Gauge . Just wondering if the price is worth it ? I didn't see the price of an economy grind on the link. |
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| Johnny Mullet | Nov 4 2009, 08:39 PM Post #7 |
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Fear the Mullet
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The cam and gear will net you a 5 MPG increase right off the bat. My 1998 has the econo cam and 10 degree gear. It has great low-end torque and is ideal for my driving technique. The econo cam does lower the powerband, so it's not ideal if you drive 60+ MPH. The Wife's Metro has a stock cam and a 10 degree advanced gear. This car has more power through the whole power band and is quite peppy compared to mine. She does not drive conservatively and like to wind the engine out between gears, so she got just the gear. |
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| Coche Blanco | Nov 4 2009, 09:49 PM Post #8 |
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Troll Certified
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What gas do you run with the gear? |
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| Johnny Mullet | Nov 4 2009, 10:18 PM Post #9 |
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Fear the Mullet
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I run premium fuel, but regular 87 octane works also. |
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| Dallas | Nov 4 2009, 11:32 PM Post #10 |
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the cam gear is worth it, its like bringing your whole powerband down, so if you notice a gain at the 2000rpm ish point, expect a loss up higher (6000ish) unless you put a better flowing cam in there too. otherwise, putting just a gear on there is still worth it. dont put a bigger cam in there if you want to save fuel, the bigger the cam the more the fuel. its pretty much linear |
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| Cobb | Nov 5 2009, 12:06 AM Post #11 |
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BANNED
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For 40 bucks, you cant go wrong. Just remember the best way to increase your fuel economy is to adjust the nut behind the steering wheel. |
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| mwebb | Nov 5 2009, 12:42 AM Post #12 |
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FOG
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1996 5sp HB 3cyl with 87 octane e10 NON top tier but also not from a "NON attainment location" in NYS base ignition timing at 9 degrees btdc with a 3tech economy cam and +10 advance cam wheel at about 45mph 2 ways 2x speed controlled by foot of mike at 46f at night low beams on heater blower on low speed firestone 155 80 13 tires at 40psi average both ways about 52mpg but the software maxes out at 60 mpg and it averages in 60 mpg when the actual MPG is above 60 mpg thus lowering the actual real average ... but for consistency , that is what i am using, the next update will max at 75 mpg ![]() right click on image- select view image - to expand image in this car with the piss NYS top tier fuel E10 there is NO as in LESS THAN ZERO benefit to using premium top tier fuel . fuel mileage suffers compared to 87 octane E10 NYS top tier fuel. no one has provided test results to disprove that , yet Edited by mwebb, Nov 5 2009, 12:50 AM.
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| wikityler | Nov 5 2009, 03:14 AM Post #13 |
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Some say...
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On these advanced sprockets, is the hole for the camshaft's pin just in a different position? Any reason why someone couldn't just drill a second hole in one of the stamped type sprockets? |
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| Hilltopcycleatv | Nov 5 2009, 08:21 AM Post #14 |
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Why not just figure out how many "teeth" on the cam sprocket is 10 degrees and advance it that far when replacing the timing belt ? |
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| Cobb | Nov 5 2009, 09:57 AM Post #15 |
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BANNED
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Yes, the hole is in a different spot. A tooth is 17 degrees, so thats impossible to just realign it for 10. I personally have not notice any difference in reg vs pre gas and fuel economy, but I do winter vs summer grade and those who add at least 10% ethanol in the city vs county. |
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