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Forum: Hot Heads Tech Talk

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on: Wed 31 of Dec, 1969 [23:00 UTC] reads:

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sebspeed
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354 conrods
on: Fri 20 of Mar, 2020 [19:30 UTC] score: 0.00
there seems to be two different part numbers for 331/ 354 conrods-1324222 & 1821345.can you use a mixture off them to make up a set.thanks for your replies.

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Jack
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Re: 354 conrods
on: Sat 21 of Mar, 2020 [15:08 UTC] score: 0.00
The 1821345 are truck rods and probably heavier.

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luckylindy
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DeSoto Intake
on: Wed 18 of Mar, 2020 [00:31 UTC] score: 0.00
Has anyone modified a Chrysler Hemi intake to work/fit a DeSoto tall deck engine? I own a Chrysler 300, 2X4 intake that I would like to have reworked to work on my DeSoto 330 tall deck motor. I would welcome any and all help you may have had trying/doing this. As you can understand I know next to nothing about DeSoto motors, because of their size difference the intakes may not work for a host of reasons. Please forgive my ignorance of DeSoto motors, this is my first one. Thanks in advance - Ted

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DaveBlakeman
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Re: DeSoto Intake
on: Wed 18 of Mar, 2020 [14:37 UTC] score: 0.00
The Chrysler head is about two inches longer than the DeSoto head. You can buy a Manifold from Bob for $495 and be done with it .

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George
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Re: Re: DeSoto Intake
on: Thu 19 of Mar, 2020 [22:58 UTC] score: 0.00
> The Chrysler head is about two inches longer than the DeSoto head. You can buy a Manifold from Bob for $495 and be done with it .



Yup! OEM intakes show up on E Bay, a lot cheaper than before the Great Recession hit 10 years ago.

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ron37
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Hydraulic Roller Lifters
on: Sun 01 of Mar, 2020 [17:25 UTC] score: 0.00
A buddy just bought a rebuilt 330 Desoto engine. It has a hydraulic roller cam and lifters. The seller said the lifters are Max Speeding Rods brand. The cam was made by Johannson from California. So the cam should be okay, as I have one of his cams. I have no idea about the lifters. Has anyone else used this brand or heard any negatives or positives about them?

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30redram
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241 max bore?
on: Fri 28 of Feb, 2020 [03:17 UTC] score: 0.00
Back in the mid 60's my Dad took a '53 241 Red Ram(3.4375 bore) and bored it .125(1/8 inch) to 3.5625 and installed '55 Plymouth 259 pistons. It worked fine and had no valve clearance problems. I still have the engine and am wondering if it can be bored another .060 so it can take 270 pistons. Does anyone have experience on boring a 241 to a 270? Are the water jacket cores the exact same or does the 270 have a different core which yields a thicker cylinder wall? Thanks.

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George
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Re: 241 max bore?
on: Fri 28 of Feb, 2020 [11:08 UTC] score: 0.00
.125 is considered max.

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JesseFringer
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330 desoto
on: Wed 12 of Feb, 2020 [22:34 UTC] score: 0.00
Why does my 330desoto smoke after winning g shutoff for 30 min ? After sitting for several weeks it really smokes for about 5 minutes,is it valve seals( if this motor even has them) and is it difficult to repair?Thanks,Jess

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George
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Re: 330 desoto
on: Thu 13 of Feb, 2020 [16:54 UTC] score: 0.00
Ex seals were never used by the OEM. There have been reports of ex valves galling when seals were put on during rebuilds.

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JesseFringer
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Re: 330 desoto
on: Wed 12 of Feb, 2020 [22:40 UTC] score: 0.00
> Why does my 330desoto smoke after being shutoff for 30 min ? After sitting for several weeks it really smokes for about 5 minutes,is it valve seals( if this motor even has them) and is it difficult to repair?Thanks,Jess

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30redram
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Re: Re: 330 desoto
on: Thu 13 of Feb, 2020 [02:57 UTC] score: 0.00
Some of the early hemi's I worked on years ago did not have seals on the exhaust valves. It seems the factory's logic was the exhaust valve stems were so close to horizontal that any oil on the stems would drip off before flowing into the exhaust guides. While the engine was running, exhaust pressure would keep oil out of the guides. My first hemi, a 241 Red Ram bored out .125 so it could take 259 Plymouth pistons, would blow some smoke only when it was initially cranked. The smoke ended in a few seconds. It had no exhaust seals.

I've always pulled the heads to change seals. I've heard of guys not pulling the heads; they used compressed air in the cylinders to hold the valves shut and various levers to compress the springs.

Have you run a compression check on your cylinders to check for ring wear?

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30redram
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Oil Filter Adapters?
on: Sat 08 of Feb, 2020 [03:40 UTC] score: 0.00
New questionNew to the site. Thanks for having me. I recently bought a 30 Plymouth truck with a 241 which was rebuilt about 10 years ago and had a new serial number stamped over the original one. Records indicate the engine originally was in a 54 truck. It has what appears to be an original remote oil filtering system. The filter canister is holding a large sock-like filtering element. The factory appearing adapter bolted to the block seems to route the oil in a manner where only oil pressure by-pass oil flows through the filter and then dumps back into the crankcase. It's been 55 years since I built a 241, so my memory is rusty. Does the original oil pump have a pressure relief? Can I convert over to one of the modern adapters without any problems? Does this engine need the "Full Flow Oil Block #20120"? Thanks.

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30redram
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Re: Oil Filter Adapters?
on: Wed 12 of Feb, 2020 [00:58 UTC] score: 0.00
> New questionNew to the site. Thanks for having me. I recently bought a 30 Plymouth truck with a 241 which was rebuilt about 10 years ago and had a new serial number stamped over the original one. Records indicate the engine originally was in a 54 truck. It has what appears to be an original remote oil filtering system. The filter canister is holding a large sock-like filtering element. The factory appearing adapter bolted to the block seems to route the oil in a manner where only oil pressure by-pass oil flows through the filter and then dumps back into the crankcase. It's been 55 years since I built a 241, so my memory is rusty. Does the original oil pump have a pressure relief? Can I convert over to one of the modern adapters without any problems? Does this engine need the "Full Flow Oil Block #20120"? Thanks.

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30redram
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Re: Re: Oil Filter Adapters?
on: Wed 12 of Feb, 2020 [01:10 UTC] score: 0.00
As an update, I connected an old time oil pressure gauge in place of the sending unit. It read 60 psi at crank-up. It remained at 60 psi when I rev'd it up. I believe the builder left the oil pump bypass in working order at 60 psi.

Now all I need is to get the sending unit and gauge to read the same. The Autometer BO182-1300 0-100 gauge is reading about 15 psi below the actual pressure on the sending unit. Adding a resistor between the sending unit and gauge makes it worse, so I either need a sending unit with less resistance or a different gauge with a smaller range. The current sending unit reads .257 ohms with no pressure on it. Has anyone inherited a similar arrangement? Thanks.

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George
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Re: Re: Re: Oil Filter Adapters?
on: Thu 13 of Feb, 2020 [16:55 UTC] score: 0.00
> As an update, I connected an old time oil pressure gauge in place of the sending unit. It read 60 psi at crank-up. It remained at 60 psi when I rev'd it up. I believe the builder left the oil pump bypass in working order at 60 psi.
>
> Now all I need is to get the sending unit and gauge to read the same. The Autometer BO182-1300 0-100 gauge is reading about 15 psi below the actual pressure on the sending unit. Adding a resistor between the sending unit and gauge makes it worse, so I either need a sending unit with less resistance or a different gauge with a smaller range. The current sending unit reads .257 ohms with no pressure on it. Has anyone inherited a similar arrangement? Thanks.

I tend to use copper line & a direct pressure guageā€¦..

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George
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Re: Oil Filter Adapters?
on: Sat 08 of Feb, 2020 [18:21 UTC] score: 0.00
Not sure about one in the O/P, I believe there may be 1 in the OEM filter base. The spring loaded ball is an anti-drain back check ball. Typically it is replaced by the full flow oil block, makes sure no oil gets through, probably not much gets around the ball. Besides the 3 sold by HH, there's one that seems to be a modified Ford FE.

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Merkleyperformance
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Egge Pistons dome volume
on: Thu 30 of Jan, 2020 [04:21 UTC] score: 0.00
Egge pistons part# L2014-8.000 Std bore 392 being used in a .060" over 354 what's the dome volume?


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DaveBlakeman
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Re: Egge Pistons dome volume
on: Thu 06 of Feb, 2020 [15:06 UTC] score: 0.00
You take modeling clay and put it into a small cookie tin ,then press the piston dome into the clay and use a CC tube to measure the volume.
>

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Eltyboy
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Need help with a 276 Desoto
on: Wed 15 of Jan, 2020 [01:51 UTC] score: 0.00
I aquired a 195r Desoto 276 hemi, it has been completely rebuilt but not assembled. I need to find a flexplate/flywheel that I can use to start it once it is assembled. I know they sell aftermarket adapters/flexplate, but I would like to find a easily attainable flywheel for a few starts before I decide what transmission I want to put behind it. Is there an easy crossover available?


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