Jarrid,
You stand corrected, was not me. Jim
Jarrid Gross wrote:
>Jim,
>
>I am running cast Iron guides on both my engines.
>
>I did find some time back, a company that showed
>silicon bronze guides avail for the chrysler engine.
>I'll have to look into that and see if they are actually available.
>
>Jim, correct me if I'm wrong, but was it not you who had some valve
>guides in development?
>
>Jarrid
>
>
>ellis838@concentric.net wrote:
>
>> Another thing to look at is the rocker assembly. The last head I did
>>for my car I took a close look at the rocker tips and did not like what
>>I found, they were all worn and there was no way the valve adjustment
>>could have been right. The feeler gauge would bridge the wear and the
>>gap was off. I think this is what lead to my constant valve adjustment
>>problems. I ended up with a couple of sunk valves which I think was
>>caused by the loose adjust from the worn rockers and it just beat the
>>seats down. I went through my pile of rockers and picked the best set.
>>Then when I looked at the rocker shafts they were badly worn also, I put
>>the best shafts I had in but still think a new set is in order. I went
>>through parts from a half dozen or so heads to come up with the best
>>bits so I think this is a wear issue that most cars have and is over looked.
>> I built a Datsun valve head for my big motor and it cost big money,
>>parts and labor over $700 with stock Datsun valves, Crane springs and
>>retainers. The parts are not all that costly but the machine work to get
>>them in the head is. Jim
>>
>> Jarrid what are bronze guides are you using, are they off the shelf?
>>
>>Jarrid Gross wrote:
>>
>>>Eric,
>>>
>>>Your machine shop is right, unleaded has nothing to do with the bent
>>>valve.
>>>What did? The fact it was en exhaust valve tells a story in itself.
>>>Perhaps lack of proper adjustment, burned the valve, then it stuck
>>>and got struck by the piston?
>>>Or perhaps you overreved the engine and bent a valve.
>>>
>>>
>>>On valve size, forget what the girls tell you, size DOES matter.
>>>The question is, how much coin you got floating round in your pocket?
>>>You wont be able to open the valves up to a considerable improvement
>>>without spending some serious money.
>>>
>>>On titanium, get out cubic coin here.
>>>
>>>On grind, a nice 3 angle valve job is nice.
>>>Wont make a big improvement, but is an inexpensive way to get another
>>>pony.
>>>
>>>New guides are reccomended as are new valves.
>>>Upgrading to guide seals is fine, but only if the guides are silicon
>>>bronze, not the cast iron originals.
>>>
>>>Thats all I can think of for now.
>>>Good luck
>>>
>>>Jarrid Gross
>>>
>>>
>>>SerIIAlpine@netscape.net wrote:
>>>
>>>>Having bent the #1 exhaust valve on my 3000mile young engine I was wondering
>>>>what my options are regarding upgrading my head. I've already portmatched
>and cleaned up my head as per serII special tuning guide recommendations and I
>just wanted to know what I could do to make the head better and more durable.
>ie:larger valves(titanium?), what type of grind, what type of guides to insist
>on etc.
>>>>
>>>>I beleive the valve failure(It's stuck halfway down) may have been due to
>using unleaded even though the machine shop that did the head said it wasn't
>an issue.
>>>>
>>>>As always, thanks for any and all help.
>>>>
>>>>Eric
>>>>'62 serr II
>>>>
>>>>__________________________________________________________________
>>>>The NEW Netscape 7.0 browser is now available. Upgrade now!
>http://channels.netscape.com/ns/browsers/download.jsp
|