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inefficient tranny

Old Mar 24, 2009 | 10:29 PM
  #11  
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Originally Posted by xfeejayx
I don't rmr where I saw 270. that isn't from personal experience though, someone mentioned it on this site.

I stated that the Ram gets 240-270rwhp in the "I hate mustang" thread. I was comparing the mustangs puny hp to the Rams.
Anyways, there are a few diff style Dyno machines. 2 main one's out in shops... Dyno Jet(inertia) and Mustang Dyno(load-bearing)
Inertia type dyno machines give high reading " false" numbers. That is why i stated 270.
Mustang or Load bearing Dyno's tend to be lower output or "real" numbers. That would be the lower hp of 240. Generally a Mustang Dyno is about 5-8% lower hp output than a DynoJet. Some can read high, some can read extra low. it all depends on how it is calibrated when set-up, but never will you get a Mustang Dyno reading that is higher than a Dynojet reading.
Ford utilizes the same concept in Torque converters and it eats up some HP. I found an article regarding higher stalls and Dyno outputs. Here ya go:
http://www.forcefedperformance.com/TechDynamometer.asp
 
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Old Mar 24, 2009 | 10:34 PM
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Originally Posted by HammerZ71
Where are you seeing bone stock dyno's in the 270 range? I've personally seen about a half dozen being performed on 3rd Gen Hemi trucks and have yet to see one break 250, and the only 2500 truck I've seen done was in the 230s!
I've posted links in the past of stock dyno runs on youtube. Only way I can see a hemi ram putting down 240 is on a mustang dyno...dynojet no way. 240ish on a stang dyno I completely believe.

Here's one with just a flowmaster muffler...279rwhp http://www.youtube.com/watch?v=ZIj3Oa4eDC8

Speaking of mustang dyno...here's a ram that put down 245rwhp on a mustang dyno. http://www.youtube.com/watch?v=ds4sRcJELnU Here's the dyno from the link on youtube http://www.big3racing.net/chassis_dyno I'm thinking those half dozen you saw were stang dynos...stang dynos are pre-loaded so you get lower numbers.
 
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Old Mar 24, 2009 | 10:36 PM
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Nevermind...dirty already said it
 
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Old Mar 24, 2009 | 10:51 PM
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i would say it's impossible that the Ram has 30% drivetrain loss. I just don't believe that. Most rwd cars are losing anywhere from 12-16% w/manuals and 16-20% w/auto's.

The Ram is rated at 345 from the factory. In which the factory rates on a DynoJet over inflated scale generally speaking. Some cars are underrated. Now the Dynojet number being 270ish would make the Ram have a 22% drivetrain loss resulting in a 75hp loss through the drivetrain BASED on manufacturer numbers. The Ram doesn't lose over 100rwhp. It's just an OVERRATED engine and it should be rated at a realistic 320hp at the flywheel and not 345.
 
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Old Mar 24, 2009 | 10:52 PM
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Originally Posted by SeVeReDiStOrTiOn
Here's one with just a flowmaster muffler...279rwhp
Do you know what flowmaster muffler it is? It sounds pretty good for just a muffler.
 
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Old Mar 24, 2009 | 10:55 PM
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Originally Posted by xfeejayx
you got a big *** sponsor ad right on top, SunCoast. also a link on the right. I think they're a little on the expensive side though.
Certain ad companies are blocked by our router, They must have been one of them as I never actually saw the ad until I turned it off for a few.

I repeat my previous question, Does anyone have a Dyno results with a TC replaced.
 
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Old Mar 24, 2009 | 10:57 PM
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Originally Posted by taker24
Do you know what flowmaster muffler it is? It sounds pretty good for just a muffler.
Nope...it just says in his comment box that it's a flowmaster dumped at the axle
 
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