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Forum: Hot Heads Tech Talk

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on: Thu 01 of Jan, 1970 [00:00 UTC] reads:

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podunk
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spark plugs
on: Thu 14 of Feb, 2019 [17:42 UTC] score: 0.00
what spark plugs are recommended for 1955 Chrysler 331 engine

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steve392
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392 exhaust valve stem seals
on: Tue 12 of Feb, 2019 [18:39 UTC] score: 0.00
I'm using positive valve stem seals on my intake valves, but unsure about the exhaust valves. Umbrella or no seal at all? I seem to remember that it's best not to run any seal on the exhaust valve, but not sure. What has everyone used on the exhaust side?
Steve

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DaveBlakeman
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Re: 392 exhaust valve stem seals
on: Sat 16 of Feb, 2019 [16:50 UTC] score: 0.00
You will make more power with seals on the exhaust guides . Seals are cheap !

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George
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Re: 392 exhaust valve stem seals
on: Thu 14 of Feb, 2019 [17:32 UTC] score: 0.00
Normally none are used on the ex side.

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DaveBlakeman
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Re: 392 exhaust valve stem seals
on: Wed 13 of Feb, 2019 [19:45 UTC] score: 0.00
I was reading {possibly on the Hastings Rings website] That it has been proven during overlap the oil is sucked hard by the exhaust guide therefor requiring seals on both intake and exhaust guides. Seals are cheap.

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ChevJerico
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I'm surprised Scat or Eagle hasn't made Hemi cranks yet?
on: Tue 12 of Feb, 2019 [11:23 UTC] score: 0.00
You think someone would have made one offering? At a minimum.

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Hoosier667
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241 cam change
on: Tue 12 of Feb, 2019 [01:01 UTC] score: 0.00
I'm new here guys but I have a question for you. I have a couple 241 Hemis I bought at an auction. I would like to build one to put into a 1941 Plymouth 1/2 ton pickup. My question is can a Polyhead camshaft be re-ground to place into the 241?

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leorob51
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1956 D500-1
on: Thu 31 of Jan, 2019 [18:41 UTC] score: 0.00
While rereading an article from the May 1956 issue of Hot Rod magazine, I noticed that there were part numbers for the carbs and camshaft for the 1956 D500-1. They are as follows:

FRONT carb Carter WCFB #2476-S
REAR carb Carter WCFB #2445-S
Camshaft, "racing" 1732555

Hope this helps, Leo

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George
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Re: 1956 D500-1
on: Mon 04 of Feb, 2019 [18:01 UTC] score: 0.00
Thanks!biggrin

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steve392
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392 Head Gasket Recommendaton
on: Tue 29 of Jan, 2019 [17:02 UTC] score: 0.00
I have a 392 that I'm currently using the SCE solid copper head gaskets. This past year, I experienced a very small (weeping) coolant leak at the head gasket. I currently have the heads off of the motor, and I am looking for some options on other head gasket styles. This is a street rod blower motor, boost is limited to around 6 pounds, so I need a gasket that wll be okay with forced induction.
Has anyone used the Best Composite/Copper gasket? I called Best, but they couldn't give any information regarding using their gasket with a blower. Their gasket is also thicker than the SCE, .052" compressed vs. .032" for the solid copper.

If anyone has used this gasket or if there are other options, I like to know what others are using in their Hemi.

Thanks,
Steve

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Webmaster
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Re: 392 Head Gasket Recommendaton
on: Thu 31 of Jan, 2019 [22:08 UTC] score: 0.00
Steve,
We have had great service out of the Best head gaskets and have customers running that standard gasket with no problems with blower engines. I asked Bob if he has ever heard of anyone having a problem with them and he hasn't either. Thanks,
Eric


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steve392
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Re: Re: 392 Head Gasket Recommendaton
on: Mon 04 of Feb, 2019 [13:41 UTC] score: 0.00
Eric, thanks for the information. I'll be going with the Best Graph-Tite gasket. Is that Hot Heads part #90300?
Thanks
> Steve,
> We have had great service out of the Best head gaskets and have customers running that standard gasket with no problems with blower engines. I asked Bob if he has ever heard of anyone having a problem with them and he hasn't either. Thanks,
> Eric
>

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Jack
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Re: 392 Head Gasket Recommendaton
on: Thu 31 of Jan, 2019 [16:22 UTC] score: 0.00
Nothing special about them.
Bought the sets off of EPay.


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hemihotrod
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Re: 392 Head Gasket Recommendaton
on: Wed 30 of Jan, 2019 [17:35 UTC] score: 0.00

I use the stock Felpro gaskets...on my blown 392...never had a problem.....It is 6% under driven....Compressed thickness is .040....

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steve392
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Re: Re: 392 Head Gasket Recommendaton
on: Thu 31 of Jan, 2019 [14:13 UTC] score: 0.00
Thanks for the information.....hemihotrod, are the Fel-Pro gaskets put on "dry" or did you use a sealant like copper coat? Checked the Fel-Pro catalog and they list a Permatorque gasket #7908-PT. Looks like the gasket has a coating and goes on dry?

Jack, the Best gasket that you used, was that the Copper composite or the plain graphite gasket? Might want to try the copper again, but generic Fel-Pro looks good also.

Bob, what does Hot Heads recommend?

Thanks,
Steve


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hemihotrod
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Re: Re: Re: 392 Head Gasket Recommendaton
on: Thu 31 of Jan, 2019 [20:09 UTC] score: 0.00
> Thanks for the information.....hemihotrod, are the Fel-Pro gaskets put on "dry" or did you use a sealant like copper coat? Checked the Fel-Pro catalog and they list a Permatorque gasket #7908-PT. Looks like the gasket has a coating and goes on dry?
>
> Jack, the Best gasket that you used, was that the Copper composite or the plain graphite gasket? Might want to try the copper again, but generic Fel-Pro looks good also.
>
> Bob, what does Hot Heads recommend?
>
> Thanks,
> Steve
> I use copper coat sealer on the metal side of the gasket..I don't have my block cut for o--rings either just use the Felpro gasket and have never had any issues..


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Jack
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Re: 392 Head Gasket Recommendaton
on: Wed 30 of Jan, 2019 [15:36 UTC] score: 0.00
I have used 'Best' gaskets on a couple of 392s with no problems.
Not blown however, but being a composite gasket I would think they would be better than solid copper.

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MrFroggy
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Valve covers for adjustable rockers??
on: Mon 21 of Jan, 2019 [17:26 UTC] score: 0.00
Awhile back a friend found a set of Imperial valve covers at a swap meet that had dimples along the edges. He sent me a picture but I told him to pass on them as I thought it was something someone had done at home (even though they looked concentric)! Then recently I found a picture of the old Surfers dragster engine with the same type of dimples. I always thought the relief dimples were in between the spark plug holes. Is this a factory version? If so what did they come on? I wish I could attach the picture!

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ron37
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Re: Valve covers for adjustable rockers??
on: Mon 28 of Jan, 2019 [01:43 UTC] score: 0.00
I have been is somewhat the same spot. I have a couple 325 Dodge Hemi engines with adjustable rockers. I have the old hump type with no names. I made aluminum spacers to raise a set of the old 53-54 RED RAM type for clearance. They were chrome, so didn't want to mess up the chrome. Had to splice in a piece on each sparkplug tube. That was fun. Have a set of SUPER RED RAM type. Trying so figure out if I want to go that spacer and tube extension way again or try putting bumps in the covers. They are not chrome yet. I have seen on industrial 315 with SUPER RED RAM covers. They had humps and were galvanized. Only type I ever saw like that.

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George
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Re: Valve covers for adjustable rockers??
on: Tue 22 of Jan, 2019 [16:04 UTC] score: 0.00
I believe all "Imperial' covers were smooth. The dimpled Firepower ones were used on the 300s.


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