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Old 11-25-2012, 07:16 AM
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Question on Adjusting valves.

Ok guys. I am getting ready to adjust the valves on my stroker. I am going to go the engine off technique starting at #1 TDC and follow the firing order. My question is I have only done this before with brand new lifters that weren't pumped up yet. I know when you are adjusting the valves with the engine running when you go to put preload on you have to turn slowly and let the lifter catch up.

So when you do this with the engine off should I loosen all the valves and give the lifters time to come up? If so how long should I wait?

This is the last thing I am going to try before I pull the Edelbrock heads and XE cam and replace with stock heads and an RV cam.

Thanks for your help.
Bret

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Old 11-25-2012, 07:34 AM
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You can loosen all the valves/rocker nuts, the lifters should loose there preload, you can then adjust the two valves per cylinder right away. There is no need to wait more than the time it takes to spin off the preload if all is well with the lifters. If the lifters are "pumped up" solid then you have an issue.

What is the reason for swapping the heads and cam?
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Old 11-25-2012, 08:01 AM
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Having alot of problems with the engine. It is not driveable. The C/R is too high. Having alot of detonation problems.

Bret
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Old 11-25-2012, 08:21 AM
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Question on Adjusting valves.

Here is an article explaining how to adjust valves with the engine off. Engine Valve Adjustment Procedure - The Right Way. I always print a copy to take with me to refer to as I am making adjustments. Here is an article from WIKI explaining how to adjust both valves on each cylinder in two rotatations of the crankshaft. To me it is the easiest way to adjust the valves. http://www.crankshaftcoalition.com/w...stment_SBC/BBC
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Old 11-25-2012, 08:26 AM
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Question on Adjusting valves.

What is the compression ratio of your engine. Is it a sbc or bbc engine. You do have aluminum heads on it now right?
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Old 11-25-2012, 08:31 AM
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Originally Posted by bj383ss View Post
Having alot of problems with the engine. It is not driveable. The C/R is too high. Having alot of detonation problems.

Bret
OK, I was thinking that we had another XE cam valve train noise issue here. Went through this my self and no matter how many times I set the valves or at what preload I could not stop the chatter, out came the cam and lifters. Some of them were so pumped up that I needed a vice to sqeeze them down.
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Old 11-25-2012, 08:32 AM
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Thanks Cdminter59. That article is great will help alot. Yes I do have aluminum heads and C/R is 10.83. It is a 388ci
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Old 11-25-2012, 08:58 AM
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Question on Adjusting valves.

Ok, Have you had the heads milled. What cc are the chambers. When you do have it running what is the engine temp? Do you remember what cam you have?
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Old 11-25-2012, 09:06 AM
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The heads were slightly surfaced. The heads are 64cc. It does not run hot. Stabilizes around 175 when warmed up. I have the Comp Cams XE268 which have learned recently is a very noisy cam. I originally posted about my problem in this thread for more info.

Detune 388 Stroker

Bret
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Old 11-25-2012, 09:21 AM
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Question on Adjusting valves.

After adjusting the valves set the timing so your total is around 32 degees. What is the highest octane gas you can get in your area. We have some gas called turbo blue which is 104 octane i think might be more. Get a couple of gallons of the high octane gas and put in the tank. If you hear any noises it will not be detonation.
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Old 11-25-2012, 09:41 AM
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Quote:
Originally Posted by bj383ss View Post
The heads were slightly surfaced. The heads are 64cc. It does not run hot. Stabilizes around 175 when warmed up. I have the Comp Cams XE268 which have learned recently is a very noisy cam. I originally posted about my problem in this thread for more info.

Detune 388 Stroker

Bret
I read through the other thread. Not to beat a dead horse but did the motor rattle allot less with the 3000 stall?. The carb did you clean and adjust with rich jetting? for timing you should be concerned with the total amount, set the thing to 30-32 total at 3500 rpm and dont worry about where the initial is once the thing is at idle as long as it is not less than 14, hook up the vacuum advance to manifold and hopefully you will have 28-32 at idle.

For an over-all solution I think the different pistons idea would be the answer at -18CC D dish KB's, leave the cam and heads alone

2 more of my cents
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