Adjustable cam discovered on 22re...
#1
Adjustable cam discovered on 22re...
I discovered an adjustable cam on recently acquired 93 22re. I understand that this will make my already oversized cam more aggressive. Right now I just want economy and a smooth idle. The rotor is rotated all the way to the left, in other words the bolts are all the way to the right of the slot on the rotor. Should I just leave it alone???
I just jumped my distributor a tooth so I could get my timing back to normal, but then I took off valve cover to adjust valve lash and here is this adjustable camshaft...WTF should I do? Should I readjust the distributor, then adjust the camshaft? Anyone with experience with this??
I just jumped my distributor a tooth so I could get my timing back to normal, but then I took off valve cover to adjust valve lash and here is this adjustable camshaft...WTF should I do? Should I readjust the distributor, then adjust the camshaft? Anyone with experience with this??
#2
Contributing Member
The involved process would be to adjust the cam to the cam manufacurers spec.
Involves a degree wheel on the crank and a dial indicator for the cam. The valves should have XXX lift at XXX degree on the crank. The engine will run best when set to the cam spec.
Note:
I ran a cam in my 327 for a year (stock timing gears) before I got a set of gears that were adjustable. Dialed it in, and it ran much better.
(edelbrock performer cam and intake)
Involves a degree wheel on the crank and a dial indicator for the cam. The valves should have XXX lift at XXX degree on the crank. The engine will run best when set to the cam spec.
Note:
I ran a cam in my 327 for a year (stock timing gears) before I got a set of gears that were adjustable. Dialed it in, and it ran much better.
(edelbrock performer cam and intake)
#3
Originally Posted by Yoda
The involved process would be to adjust the cam to the cam manufacurers spec.
Involves a degree wheel on the crank and a dial indicator for the cam. The valves should have XXX lift at XXX degree on the crank. The engine will run best when set to the cam spec.
Note:
I ran a cam in my 327 for a year (stock timing gears) before I got a set of gears that were adjustable. Dialed it in, and it ran much better.
(edelbrock performer cam and intake)
Involves a degree wheel on the crank and a dial indicator for the cam. The valves should have XXX lift at XXX degree on the crank. The engine will run best when set to the cam spec.
Note:
I ran a cam in my 327 for a year (stock timing gears) before I got a set of gears that were adjustable. Dialed it in, and it ran much better.
(edelbrock performer cam and intake)
#4
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There is no shade tree method. If you screw it up remember that this is an "INTERFERANCE ENGINE". You will be digging valves out of the pistons. Your ignition timing has no bearing on your cam timing. Ignition is based off TDC of the piston/crank position not the cam. But if you turn that adjustment you will have to adjust your distributor to put the timing back. SO I guess if you are going to move the cam ajustment do that first then set your ignition. If I were you I would get rid of that ajustable cam gear and put in a stock one. Unless you are racing the engine and have a particular RPM range that you want to make power in. Your fuel injection map will also work better with a standard cam timing.
IMHO
IMHO
#5
Registered User
Those cam gears are used when the deck height is changed (ie, when the engine is rebuilt, the head is milled) and the shorter distance causes a change in timing.
Here is a web site on degreeing the cam on a 22re engine.
http://www.4x4wire.com/toyota/tech/cam_degreeing/
Here is a web site on degreeing the cam on a 22re engine.
http://www.4x4wire.com/toyota/tech/cam_degreeing/
#6
Registered User
i don't think the cam gear allows enough adjustment to smack the pistons into the valves, but i'd still rotate the engine over by hand a few times after changing its setting to ensure that nothing is going to cause problems.
as a general rule of thumb, retarding the camshaft timing will move the powerband higher up, and advancing it will move it down.
as a general rule of thumb, retarding the camshaft timing will move the powerband higher up, and advancing it will move it down.
#7
Originally Posted by kyle_22r
i don't think the cam gear allows enough adjustment to smack the pistons into the valves, but i'd still rotate the engine over by hand a few times after changing its setting to ensure that nothing is going to cause problems.
as a general rule of thumb, retarding the camshaft timing will move the powerband higher up, and advancing it will move it down.
as a general rule of thumb, retarding the camshaft timing will move the powerband higher up, and advancing it will move it down.
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#8
Registered User
The adjustable cam gear should indicate the amount of "degrees" that is advanced and retarded. Adjusting it to "0" is where the factory setting is, which is typically in the middle.
#10
Originally Posted by 84sr5yoty
The adjustable cam gear should indicate the amount of "degrees" that is advanced and retarded. Adjusting it to "0" is where the factory setting is, which is typically in the middle.
Overall I am pleased because the idle did smooth out and I don't have anymore idle surge after I originally retarded the timing back to spec (5 degrees) with the jumper wire installed on the diagnostic terminal. It was only after this that I decided to adjust valve lash and discovered the adjustable cam.
My idle does go a real low now when I am slowing down or dropping it out of gear but it hasn't stalled like it used to and I don't get the surge so I think I will leave things alone for awhile.
#12
Originally Posted by Bumpin' Yota
as far as the idle dropping when slowing down check your dash pot if you have one....dunno if 22re's have em...lol
#13
Registered User
its a 1" diameter piece that has a small rod that impacts the throttle plate lever your throttle cable indexes. It's job is to keep the throttle plate ever so slightly open when you pull you foot completely out of the gas, this allows the mixture to lean out and lower emmisions. However it could theoretically have an impact on RPM too....
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