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joes68340s
Modifying 241 poly


Hi, I am new to early hemis and polys. I have a 55 Plymouth Belvedere with a 241 2 bbl and powerflite. I am looking to change over to a 727 torqeflite and I want to know if the engine can be converted to hemi head with 4 bbl. Is this even worth it. Also whats the best way to get power steering in this car. Thanks Joe
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on: Tue 27 of Jan, 2009 [21:53 UTC] reads: 3789

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George
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Re: Modifying 241 poly
on: Tue 27 of Jan, 2009 [23:58 UTC] score: 0.00
> Hi, I am new to early hemis and polys. I have a 55 Plymouth Belvedere with a 241 2 bbl and powerflite. I am looking to change over to a 727 torqeflite and I want to know if the engine can be converted to hemi head with 4 bbl. Is this even worth it. Also whats the best way to get power steering in this car. Thanks Joe

You have to change pistons, & the complete head assymbly including push rods & ex mans. Check for push rod clearance where they go through the block. A 4bl intake for the 270 will work. The tranny adaptor for the 392 will work. As tiny as the 241's displacement is I'd use a 904 instead of the 727, it'll use less power to operate.

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joes68340s
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Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [00:20 UTC] score: 0.00
> > Hi, I am new to early hemis and polys. I have a 55 Plymouth Belvedere with a 241 2 bbl and powerflite. I am looking to change over to a 727 torqeflite and I want to know if the engine can be converted to hemi head with 4 bbl. Is this even worth it. Also whats the best way to get power steering in this car. Thanks Joe
>
> You have to change pistons, & the complete head assymbly including push rods & ex mans. Check for push rod clearance where they go through the block. A 4bl intake for the 270 will work. The tranny adaptor for the 392 will work. As tiny as the 241's displacement is I'd use a 904 instead of the 727, it'll use less power to operate. Thanks , Is there any special head i need to look for. Thanks Joe

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George
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Re: Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [04:19 UTC] score: 0.00
> > > Hi, I am new to early hemis and polys. I have a 55 Plymouth Belvedere with a 241 2 bbl and powerflite. I am looking to change over to a 727 torqeflite and I want to know if the engine can be converted to hemi head with 4 bbl. Is this even worth it. Also whats the best way to get power steering in this car. Thanks Joe
> >
> > You have to change pistons, & the complete head assymbly including push rods & ex mans. Check for push rod clearance where they go through the block. A 4bl intake for the 270 will work. The tranny adaptor for the 392 will work. As tiny as the 241's displacement is I'd use a 904 instead of the 727, it'll use less power to operate. Thanks , Is there any special head i need to look for. Thanks Joe

Heads for the 315 & 325 are best, but 241/270 will work.

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George
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Re: Re: Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [04:22 UTC] score: 0.00
> > > > Hi, I am new to early hemis and polys. I have a 55 Plymouth Belvedere with a 241 2 bbl and powerflite. I am looking to change over to a 727 torqeflite and I want to know if the engine can be converted to hemi head with 4 bbl. Is this even worth it. Also whats the best way to get power steering in this car. Thanks Joe
> > >
> > > You have to change pistons, & the complete head assymbly including push rods & ex mans. Check for push rod clearance where they go through the block. A 4bl intake for the 270 will work. The tranny adaptor for the 392 will work. As tiny as the 241's displacement is I'd use a 904 instead of the 727, it'll use less power to operate. Thanks , Is there any special head i need to look for. Thanks Joe
>
> Heads for the 315 & 325 are best, but 241/270 will work. You might want to look @ the 315 build @ www.webrodder.com ignoring the exotic cam & crank used.

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ron37
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Re: Re: Re: Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [17:24 UTC] score: 0.00
The 241 is okay, but a 315 or 325 will have a lot more torque and move the car better. One of the guys that comes to our local rod runs has a 315 and it fits nicely. It is probably about 1" wider, but not that much heavier. He has a set of the smooth truck valve covers on it. They are chromed with big red and gold decals the say PLYMOUTH. Looks cool like it came from the factory that way. You can get some horses out of the 241 and 270 engines, but it is easier to build an almost stock 315 or 325 and get more. You could use a 330 Desoto. That is about a little over an inch wider than the 315/325. With the 241 and 270, you have to get forged pistons to get the compression up to 9 or 9.5. It will cost about the same to build a low or high deck, so I am partial to the high decks, even though I have a 241 and a 270. Any hemi is great from a 241 to a 392, but in some car the Chrysler gets crowded in the engine compartment. If I am remembering right, the Plymouth's of the 50's had enough room for any hemi, although the Dodge worked best. If you special ordered a Plymouth with a hemi, you got a Dodge hemi. They did a few in the local factory in the 50's.

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joes68340s
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Re: Re: Re: Re: Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [23:08 UTC] score: 0.00
> The 241 is okay, but a 315 or 325 will have a lot more torque and move the car better. One of the guys that comes to our local rod runs has a 315 and it fits nicely. It is probably about 1" wider, but not that much heavier. He has a set of the smooth truck valve covers on it. They are chromed with big red and gold decals the say PLYMOUTH. Looks cool like it came from the factory that way. You can get some horses out of the 241 and 270 engines, but it is easier to build an almost stock 315 or 325 and get more. You could use a 330 Desoto. That is about a little over an inch wider than the 315/325. With the 241 and 270, you have to get forged pistons to get the compression up to 9 or 9.5. It will cost about the same to build a low or high deck, so I am partial to the high decks, even though I have a 241 and a 270. Any hemi is great from a 241 to a 392, but in some car the Chrysler gets crowded in the engine compartment. If I am remembering right, the Plymouth's of the 50's had enough room for any hemi, although the Dodge worked best. If you special ordered a Plymouth with a hemi, you got a Dodge hemi. They did a few in the local factory in the 50's. Thanks good info I now am trying to decide if it is worth changing over to another Hemi. Or just convert over to a more modern drivetrain. Money is now an issue Thanks Joe

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George
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Re: Re: Re: Re: Re: Re: Re: Modifying 241 poly
on: Wed 28 of Jan, 2009 [23:28 UTC] score: 0.00
> > Thanks good info I now am trying to decide if it is worth changing over to another Hemi. Or just convert over to a more modern drivetrain. Money is now an issue Thanks Joe

Hemis are expensive. Be a lot cheaper to just convert what you have, vs buying a different one. A 318/904 would be much cheaper, not sure on oil pan sump match up.


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