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  #41  
Old 02-20-2018, 09:25 PM
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Quote:
Originally Posted by golfer View Post
on our cylinder head flow bench, a 6.4L head flows about 60% more CFM than a 7.3L head...stock to stock

HEUI is definitely an issue wrt to performance...but unless you want to run a solid/no coolant (7.3L) head, going to common rail isn't a gain.

if you want to run coolant in your 7.3L heads (ie, our CNC ported), you'd still be short on CFM compared to a stock 6.0/6.4L

it's a real nut kicker.
How would a set of stage 2 ported heads from y'all compare to stock 6.4 heads?
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  #42  
Old 02-21-2018, 01:41 AM
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The guys who are using P-pump set-ups they have developed log style intakes, with individual runners, take a look at Smokin Addictions engine build.. Now that is way out of most individuals range of nature, but I've wonderered for quite some time what would some runner style intakes do for head flow and remote mount the turbo (much like the 6.5 diesel) and see what it does. I think some custom log style intakes would drastically improve head flow on a 7.3..
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  #43  
Old 02-21-2018, 05:36 AM
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I wondered the same thing about how they achieve more flow for the mechanical setups.

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  #44  
Old 02-21-2018, 08:18 AM
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Quote:
Originally Posted by Timmy View Post
How would a set of stage 2 ported heads from y'all compare to stock 6.4 heads?
very close. within 5CFM
  #45  
Old 02-21-2018, 04:08 PM
C'roy78stroker C'roy78stroker is offline
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Funny you mention that elrodalexander, that's my plan is to remote mount the turbo to passenger fender well. Much like Duramax setups. Then try to come up with a large capacity intake manifold. I've just finished removing the manifolds today. I'll be ordering the flanges and tubing soon.
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  #46  
Old 02-21-2018, 08:58 PM
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Quote:
Originally Posted by golfer View Post
very close. within 5CFM
Have y'all ever dyno tested the hp gain going from stock heads to your ported heads?
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  #47  
Old 02-25-2018, 04:20 AM
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Quote:
Originally Posted by elrodalexander73 View Post
The guys who are using P-pump set-ups they have developed log style intakes, with individual runners, take a look at Smokin Addictions engine build.. Now that is way out of most individuals range of nature, but I've wonderered for quite some time what would some runner style intakes do for head flow and remote mount the turbo (much like the 6.5 diesel) and see what it does. I think some custom log style intakes would drastically improve head flow on a 7.3..
Technically, it won't change cfm in the head at all. But it may force more air through with boost, you would still have to clean up the flow IN the head.
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D3leted 6.0's are the best. D3lete them and replace with a Cummings.
  #48  
Old 06-11-2018, 08:21 AM
C'roy78stroker C'roy78stroker is offline
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I'll be looking into this in case anyone was remotely interested in the original idea. If the stock crank rod journals can be destroked .250, a longer custom rod would be built, combine that with a .010 overbore, displacement would come out to a 6.9L ironically. I also ran numbers on the rod/stroke ratio (1.88) and bore/stroke ratio (1.04) with the altered setup. If the general ratio rules of thumb apply to any internal combustion engine then these numbers make it seem plausible. Plus with a longer rod, there would be more dwell time for the Piston near TDC which would also aid in the fuel injection window problem that we start to face with large fuel at higher rpm's. I'd like to get input about whether or not these calculations could be applied to diesel short block assemblies or not. Seems to me that rod ratio was a reason 6.7 Cummins crowd we're destroking down 6.4 liters.
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  #49  
Old 06-18-2018, 09:32 AM
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Quote:
Originally Posted by Timmy View Post
Have y'all ever dyno tested the hp gain going from stock heads to your ported heads?
Thatís the real question, Iím sure they have, they have their own engine dyno.

Iím 100% sure they make more power, Iíve just never seen any dyno results between 100% stock heads, a mild port job, and Swamps heads.

Iíve also not seen an insane rwhp gain between trucks with stock heads vs trucks with ported or Swamps/Crutchfield/Mondello heads.

There is a gain, but I donít see it taking my breath away
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  #50  
Old 06-18-2018, 10:56 AM
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Quote:
Originally Posted by emev0l View Post
Thatís the real question, Iím sure they have, they have their own engine dyno.

Iím 100% sure they make more power, Iíve just never seen any dyno results between 100% stock heads, a mild port job, and Swamps heads.

Iíve also not seen an insane rwhp gain between trucks with stock heads vs trucks with ported or Swamps/Crutchfield/Mondello heads.

There is a gain, but I donít see it taking my breath away
117hp

back in 2013 we did 280 something dyno runs, changing from stock heads/manifolds to CNC heads and headers, and tested about 6(8?) different cam profiles (with each inj/head iteration) we worked on with our cam manufacturer.
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