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Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno
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56D500boy
Posted 2020-02-15 11:33 PM (#594342)
Subject: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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Lots of screwing around but worth watching if you are a 241, 270, 315 or 325 Dodge hemi owner (in my opinion). I learned a few things for sure.

This:

https://www.youtube.com/watch?v=kafSJu-eYFE



Edited by 56D500boy 2020-02-15 11:34 PM
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Brushwolf
Posted 2020-02-25 7:29 PM (#594829 - in reply to #594342)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno


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Yep, good info.. Regarding the bellhousing.. I have an engine test stand and figured to use a truck stick hemi bell and flywheel for starter provisions. What I wonder though is whether the aluminum plate for auto transmissions was used on the sticks too? I got a 315 truck hemi and parts along with the 325 factory hemi and it was a basically a load of parts, so I didn't remove the truck bell myself, so idk.. Or does a truck bell bolt direct to motor on the big iron truck bellhousing? Guess I will find out when the snow melts..
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58coupe
Posted 2020-02-26 11:49 AM (#594850 - in reply to #594342)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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The standard trans. bellhousings bolt directly to the block without the aluminum spacer plate.
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Powerflite
Posted 2020-02-26 1:02 PM (#594856 - in reply to #594342)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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I agree. My truck with 4-speed has no adapter either.
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Powerflite
Posted 2020-02-26 1:20 PM (#594857 - in reply to #594342)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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I was mildly impressed with it until he said he built it to stock specs. He even admitted that the compression was only around 7.5:1. Why would you keep such a crappy compression??? Bump it up to around 10.5:1 with a decent cam & shorty headers, and you would see what it could really do. The poor motor can barely keep running with that crappy compression level. I really don't understand why people want to build a motor with the same crap specs that it came with from the factory. Sure, custom pistons cost money, but an extra $400 is well worth it to get a motor that can really perform like a hemi should. If you're not willing to do that, why rebuild it at all?? I didn't listen to the whole thing, so maybe he didn't build the bottom of the motor and left it as it was. That would be the only good excuse for that.

Edited by Powerflite 2020-02-26 1:23 PM
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Mopar1
Posted 2020-03-01 5:28 PM (#595046 - in reply to #594857)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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Powerflite - 2020-02-26 12:20 PM

I was mildly impressed with it until he said he built it to stock specs. He even admitted that the compression was only around 7.5:1.
Advertised C/R was 7 or 7.1:1. On Doc Fromader's old Webrodder site they built a 241. The OEM C/R measured out at 6.19.

Edited by Mopar1 2020-03-01 5:29 PM
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wayfarer
Posted 2020-03-01 7:58 PM (#595051 - in reply to #594342)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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Yeah, gotta agree with Powerflite, why bother to do all of the work for only half of the potential benefits?
We haven't sent an engine out of the shop without 10:1 forgings in over 20 years.
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Powerflite
Posted 2020-03-01 8:16 PM (#595052 - in reply to #595046)
Subject: Re: Nick's Garage tries a 54 Dodge 241 4bbl hemi (Indy Pace Car clone) on their dyno



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Mopar1 - 2020-03-01 2:28 PM
Advertised C/R was 7 or 7.1:1. On Doc Fromader's old Webrodder site they built a 241. The OEM C/R measured out at 6.19.


Wow, that really sucks. That's my experience too, that the actual compression is typically lower than what's advertised. That makes this combo extremely lame. Built right, that motor should easily put out 250 hp or more.
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