Shelby Posted January 18, 2003 Report Share Posted January 18, 2003 just wondering if any one else had done a cam timeing check on their stock cam and what findings they had come up with Link to comment Share on other sites More sharing options...
ZPI28 Posted January 18, 2003 Report Share Posted January 18, 2003 I am pulling my head tomorrow, putting the 9116 Head set with new bolts and the JV elimination plugs in. What do you need me to check before I disassemble? Ill check it for ya and let ya know>> Link to comment Share on other sites More sharing options...
importwarrior Posted January 18, 2003 Report Share Posted January 18, 2003 yes i want to learn how i can check it. i have a 87 and 88 and am looking in to getting an adjustable timing gear for them and need to know how i can set the timing. is the timing setting, 25 deg before top dead center for the intake valves? thanks Shelby! Link to comment Share on other sites More sharing options...
Shelby Posted January 18, 2003 Author Report Share Posted January 18, 2003 the only spec's i can find for our stock cams is 25 BTDC intake valve starts to open, what we need befor guys start changeiing cam timeing is a number of finding from say a large enought number of cars to have a general idea of what the average car is running at, and also what the cam is at on some of the mod'd engines that have been dyno'd ,it's fine to say i'm gona advance my cam or retard it what ever , but with out deff infomation on how it effects our engines it'l be doing so in the dark the first couple of times you do this it is a pain in the rear but with pratice it gets real easy, just very time consumeing and sence theres no site that i have found or heard about that has any spacific info on our car's it's gona be up to us to build a referance libary of cam timeing findings and go from there , the first step is to record as many findings as posible to get a base line on where they are now i' go out on a limb and bet $5.00 not one engine will have the cam time'd to stock specs, so the first thing befor doing a lot of advanceing and so forth would be to dyno a few at stock timeing specs and then with diff advance settings to find the best setting for our engine mods and cam profiles and the 272 , 284, 292 etc you can bet the roller rocker guys are running late , but by how much and is this hurting them, thats what we need to find out piston stop , they can be made real easily, i have 4 or 5 that many yr's ago we knock'd the center out of spark plugs and weld'd in them bolts that i had ground the heads of nice and round, you use diff lengths of bolts for diff engines and diff plugs for what ever the engine takes, you need to find the exact TDC with out the t-chain install (or i've found it easier to do this way) but with the head on and tourqe'd down, the chain gears need to be on the crank so the degree wheel won't have to be undone to install them later this is because you'l need to be turning the engine in both directions as an alternate methoid, if the engine is assemble'd ,use a flat blade screw driver to maintain the chain tention on the tentioner side so the pull side of the t-chain never sees any slack when the engine is rotate'd backwards being exact when finding the TDC point is very important there are many ways of doing this , and a lot of diff site will have many diff ways of doing it, same with finding the cam center point, but with only one spec to go by the mic-ing of the intake valve start of opening can be measure'd at the spring retainer, to be able to measure the closeing point you 'l need a dial indicator that will read over 580 tho 600 or more would be best , with solid rocker arms, you'l need the clearance set to .006 just as it normaly runs at , hyd lifters need to be at normal preload and full of oil theres a lot of guys with the smarts to tell you a lot more then i can about degreeing a cam , i can only tell you it's very important if you realy want to get the most out of your engine Link to comment Share on other sites More sharing options...
dstar26t Posted January 18, 2003 Report Share Posted January 18, 2003 http://www.4x4wire.com/toyota/tech/cam_degreeing/ This will help give you guys an idea of what needs to be done...in addition to shelby's comments. I've got all the stuff so I'm planning on doing mine soon...it's 20 degrees out right now so it's gonna have to wait, lol. The car has all new timing components and a schneider 274 so it'll be interesting to find out where the centerline is. Good luck! Nate Link to comment Share on other sites More sharing options...
Shelby Posted January 18, 2003 Author Report Share Posted January 18, 2003 Nate finding the center line is great for cams with a spec sheet, but check the valve opening time to see if it is opening at the sepc settings , it takes like info to be able to compair one cam timeing against the others untill we can get a center line spec for the stock cams thanks for the contribution, it's all appr Link to comment Share on other sites More sharing options...
dstar26t Posted January 18, 2003 Report Share Posted January 18, 2003 No problem shelby. I'll be sure to post results. Link to comment Share on other sites More sharing options...
Tim_C. Posted January 20, 2003 Report Share Posted January 20, 2003 Well, a center line spec for the stock cams will help the stock cam people, but you need the spec for whatever cam you're running. The roller rocker used on the stock cam will definitely need advancing to take full advantage of the rollers. The stop is made easiest by using a spark plug non-fouler adapter, and threading the small end for a long bolt. You can use the dial indicator on the valvespring for that too, but it's more of a pain. I think most of ours will be very close to the same dgree retarded from chain slack. Getting a bunch of specs would be great, but I wouldn't trust someone else's reading for my reference. However, we can get close, and know what bushing to use that will help for sure. Link to comment Share on other sites More sharing options...
Edde Posted August 10, 2008 Report Share Posted August 10, 2008 (edited) See if this sounds right on a stock cam. Nope. Totally wrong. NVM Edited August 12, 2008 by Edde Link to comment Share on other sites More sharing options...
pagemo Posted August 14, 2008 Report Share Posted August 14, 2008 (edited) I have 4 or 5 unsold adjustable cam gears left from the GP (several people backed out)Check the GP section or send me a PM. Shameless Plug :hmm3grin2orange: Edited August 14, 2008 by pagemo Link to comment Share on other sites More sharing options...
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