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Veteran
Posts: 118
Location: Maryland | All,
I'm planning to do a 413 long ram swap on my Poly 318 powered '61 Plymouth Wagon. Rumor has it that it would be a good idea to upgrade the torsion bars. I was told to either find a pair of big block bars, or use Imperial bars. If true, do they sell them new? Where can you get them used? Any info or input would be appreciated.
Rob |
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Expert 5K+
Posts: 8444
Location: Perth Australia | Not sure if you really need to.
The 318 poly is quite a lump of an engine, I don't think the BB was that much heavier
Just check the weights, but this is all said without checking a parts book which is where the answer lies
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Veteran
Posts: 118
Location: Maryland | Thanks for the info! Yeah, it looks like the 413 is about 70lbs heavier than the poly 318...... according to the internet! |
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Expert 5K+
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| yeah i am using 326 torsion bars on my dodge for the 392 hemi. Its only 100 lbs heavier but I easily took 100 lbs off(intake, starter, manifold, water pump) others...
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Expert 5K+
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Location: northern germany | pistolgrip - 2018-07-03 10:50 AM
Thanks for the info! Yeah, it looks like the 413 is about 70lbs heavier than the poly 318...... according to the internet!
Do you have a link? Actually a B is lighter than a 318 and a B is only 10-15 pounds heavier than a RB. Also the Polys used more cooling water and aluminum parts for BB's are readily available.
I'd be surprised if a RB is much heavier than a Poly. Of course a BB is making more power and if you want to use it, heavier T-bars and sway bars are required. |
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Location: WHEELING,WV.>>>HOME OF WWVA | poly 318 bare block with bearings and caps = 192 lbs
413 @ with same added = 220
but thats just part of it . all the ancillary parts gotta be added in but i'd run the same t bars with out a second thought as long as they aint ate up or damaged ---------------------------------------------------------later |
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Veteran
Posts: 118
Location: Maryland | 1960fury - 2018-07-03 2:40 PM
pistolgrip - 2018-07-03 10:50 AM
Thanks for the info! Yeah, it looks like the 413 is about 70lbs heavier than the poly 318...... according to the internet!
Do you have a link? Actually a B is lighter than a 318 and a B is only 10-15 pounds heavier than a RB. Also the Polys used more cooling water and aluminum parts for BB's are readily available.
I'd be surprised if a RB is much heavier than a Poly. Of course a BB is making more power and if you want to use it, heavier T-bars and sway bars are required.
http://www.hughesengines.com/TechArticles/5engineweights.php
Edited by pistolgrip 2018-07-03 3:22 PM
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Location: northern germany | pistolgrip - 2018-07-03 3:21 PM
1960fury - 2018-07-03 2:40 PM
pistolgrip - 2018-07-03 10:50 AM
Thanks for the info! Yeah, it looks like the 413 is about 70lbs heavier than the poly 318...... according to the internet!
Do you have a link? Actually a B is lighter than a 318 and a B is only 10-15 pounds heavier than a RB. Also the Polys used more cooling water and aluminum parts for BB's are readily available.
I'd be surprised if a RB is much heavier than a Poly. Of course a BB is making more power and if you want to use it, heavier T-bars and sway bars are required.
http://www.hughesengines.com/TechArticles/5engineweights.php
It says "Estimate" 600 PLUS for the Poly. According to a Magazin article from 57 or 58, quoting Mopar engineers, the Poly is heavier than a low deck big block. A couple of years ago a Mopar magazine bought various B/RB engines and weighed and measured them. There wasn't much difference between a B and RB angine and if I remember correctly some B/RB even weighed about the same. Also keep in mind that the Poly uses a lot more cooling water.
Edited by 1960fury 2018-07-03 6:27 PM
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Expert 5K+
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Location: northern germany | 60 dart - 2018-07-03 3:01 PM
poly 318 bare block with bearings and caps = 192 lbs
413 @ with same added = 220
but thats just part of it . all the ancillary parts gotta be added in but i'd run the same t bars with out a second thought as long as they aint ate up or damaged ---------------------------------------------------------later
weigh the assembled heads of a poly and the 413. I wouldn't be surpises if the Poly heads would weight twice that of the 413's. |
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