Competition O-ring question

[ThrottleJockey]

I want to go to Van Haisley Machine in Fairmont, In for an O-ring job to my 24 Valve head. Do I take them the head AND the block, or just the head?



Thanks in advance!

Brian

 

[01smokinram]

If it's just an o-ring job,take the head but if you want fire rings you'll have to take the head and block.

 

[Huff N Puff]

Fire rings work in either head or block

From what I understand you can cut the groove in either the the head, or you can groove the head, and the block combination. It depends on how much boost you intend on running. For up to 80psi you can cut a . 032 deep and . 120 wide in the head. Studs are required for either. If you plan on running more than 80psi you need to groove the head and the block, but you also have to install bigger studs that involves honing out the head bolt holes in the head, and redoing the threads in the block. I personally think the bottom end would need beefing up over 80psi of boost. I have installed Van Haisley's fire ring set up in my truck. I opted to just groove the head. The system has only been in for a week so I can't comment on the dependability. So far so good. Merv

 

[ThrottleJockey]

Fire ring and O-ring and C-ring?



Please explain the differences?

 

[jwilliams3]

You do not need studs to run an O ringed head.

But, if you are going to go above 60 psi (opinion) on a regular basis you might as well get them.

But, I have seen trucks using stock bolts and holding up with 60+psi on a daily basis. (dual O ring setup).



Haisley's does an excellent job O ringing heads, I run one of their O ringed heads on my truck.

Have them deck the head while your at it (looks great!)



--Justin

 

[propuller]

From what i understand Enterprise Engine cuts the block & leaves the head alone. Is there a reason for doing only the block & what is the advantage of this. I understand that the head can lift & warp causing the gasket to blow. Enterprise told me they use the stock head bolts as long as they are within specs & they havnt had any problems by o ringing the block & using stock bolts & a stock gasket. Anybody know anything about this procedure let me know. Kurt.

 

[F8LDOSE]

I just had my block bored, the cylinders were perfectly round, installed studs, then torqued down the head. Out of curiosity we checked the cylinders from the bottom and now their out of round by . 0035. From what i hear nobody has ever bothered to check this before, studs will be more prone to twist the block like this. I have to wait to get my head back to check with stock bolts. This may be a problem for some people in the future who are installing studs on motors with mileage on them in their trucks. If anybody else has ever checked this I'd like to hear, I can't believe that nobody has ever gave this consideration before.

 

[Battering Ram]

BDoty, This should answer yours or anyone elses questions about the Haisley Fire ring setup.



http://www.dieseltruckresource.com/yabbse/index.php?board=7;action=display;threadid=18103;start=75

 

[JohnE]

Originally posted by F8LDOSE

I just had my block bored, the cylinders were perfectly round, installed studs, then torqued down the head. Out of curiosity we checked the cylinders from the bottom and now their out of round by . 0035. From what i hear nobody has ever bothered to check this before, studs will be more prone to twist the block like this. I have to wait to get my head back to check with stock bolts. This may be a problem for some people in the future who are installing studs on motors with mileage on them in their trucks. If anybody else has ever checked this I'd like to hear, I can't believe that nobody has ever gave this consideration before.

That's why high performance engines are usually bored with a torque block installed. It replicates the distortion caused by a fully torqued head so you get a truer bore. I don't know if 35 tenths is a problem or not.

 

[F8LDOSE]

It's 3. 5 thousanths. EVERYBODY i talked to said i didn't need a torque plate for the B series. I hunted for one anyway and nobody had one, i could have one made but it was $1000, and i couldn't find a peice of two inch thick cast iron to make my own. I could'nt justify the cost for one or two rebuilds. Now if this block is trash, it would of been worth it.

 

[jwilliams3]

How much torque is used on the typical 24 valve stud nut?

How much is too much?

By the way, B series blocks are machined using a deck plate.



--Justin

 

[JohnE]

Sorry, old machine shop terminology.

35 ten thousanths (or tenths) is the same as 3&frac12 thousanths.

 

[JB @ C and L Machine]

Originally posted by F8LDOSE

It's 3. 5 thousanths. EVERYBODY i talked to said i didn't need a torque plate for the B series. I hunted for one anyway and nobody had one, i could have one made but it was $1000, and i couldn't find a peice of two inch thick cast iron to make my own. I could'nt justify the cost for one or two rebuilds. Now if this block is trash, it would of been worth it.

Wow. . 1000 bucks... I could of made ya one for at least half of that. . JB