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Go Back   Dodge Cummins Diesel Forum > 2nd Gen. Dodge Cummins 94-98 12V Forums > 94-98 Performance Parts Discussion
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Old 05-15-2012, 03:57 AM   #1 (permalink)
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66/s4t twin set up?

Is anyone running this set up? What is your set up with it, how does it spool, and hp numbers?

Thank you for comments!
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Old 05-15-2012, 10:16 AM   #2 (permalink)
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66 is relatively big for a primary, most likely a slow spooling set up on the street i'd say.
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Old 05-15-2012, 06:28 PM   #3 (permalink)
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I have a 66 on it now so by putting a big bottom turbo on would it make it spool slower?
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Old 05-15-2012, 06:28 PM   #4 (permalink)
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To the top
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Old 05-15-2012, 09:08 PM   #5 (permalink)
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Yes it has been done many times, I plan on doing the same thing on mine. I wouldnt think that spool is going to be that big of an issue with the right injector, converter, and AFC setup. Right now I love home my 66 spools so with a S4 under it it will be killer!
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Old 05-15-2012, 10:44 PM   #6 (permalink)
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That is what I wanted to hear thank you and what size stick are you think I have a set of 5x.018 from industrial and planning on sending my pump out to get benched so I am hoping it will all come together and work well
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Old 05-16-2012, 08:52 PM   #7 (permalink)
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I have 5x20's and I am planning on going to a 13mm pump.
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Old 05-16-2012, 10:32 PM   #8 (permalink)
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I am going with a s482 on bottom just talked to Mike Hallas and he said he ran that set up and it worked good so that's my plan!!
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Old 05-16-2012, 10:35 PM   #9 (permalink)
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That is a hellaciously huge setup lol. I hope you don't plan to street that thing
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Old 05-17-2012, 06:33 AM   #10 (permalink)
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Why not? A 13mm pump turned down does the same thing as a maxed out 12mm. It just does it smoother without as much strain on the pull. It just takes AFC tuning like anything else. The. 5x20s I already drive on the street with my single 66 with my full manual auto.
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Old 05-17-2012, 09:36 AM   #11 (permalink)
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66 over anything is going to spool up slower than a 66 by itself.

In my opinion, running a 66 over anything smaller than a 95mm atmosphere charger is a waste of spool-up for no gain in power. The only situation where it makes sense to me (66 over 82) is land speed racing running wide open throttle for a minute or more.
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Old 05-19-2012, 04:13 PM   #12 (permalink)
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not trying to hijack but we are on the same discussion here so what do guys think about my 64/74/.85 with a 74/84/1.15 is it going to be a complete waste of time or is it going to be beneficial i have both turbos so just need to build the pipes to complete it
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