CFM intake for 7.3
Post Fiend
Joined: Sep 2006
Posts: 5,584
Likes: 0
From: Millbrook Alabama
Exactly what I was thinking Ryan. Chris and I talked about this last week and agreed we'd find a used one and put it on the band saw and cut it apart. If Joe has already done that and will show us some pics then it could save me some hunting for free used pieces.
Postmaster
Joined: Jun 2006
Posts: 2,647
Likes: 0
From: Fulltime RVer
Here's some diagrams and pics of the turbo part, and this is where you should install the MAP sensor so that it reads a higher value sooner to add the fuel quicker for faster spool up of the turbo!
I think someone could fabricate a prototype and test it, and then go into production and sell them.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
I will try and get some pictures this weekend of the one I just cut apart. I am sure you could save the hot side if you wanted, I just start cutting some relief cuts in it when I cut them... Here is the finished product...
Postmaster
Joined: Jun 2006
Posts: 2,647
Likes: 0
From: Fulltime RVer
It won't increase your "steady state maximum HP" but Jody said he noticed a SOP increase in his throttle response.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
I have a bit of lag due to a TC that is too tight... Might help with that. I should be able to swap it tomarrow.
Postmaster
Joined: Sep 2008
Posts: 3,220
Likes: 0
From: VA
Well....I got a final retail price on these babies....
Its a little small....
http://i378.photobucket.com/albums/o...it16/price.jpg
Its a little small....
http://i378.photobucket.com/albums/o...it16/price.jpg
Postmaster
Joined: Sep 2008
Posts: 3,220
Likes: 0
From: VA
Dont worry bout looking at the pic....
399 is one color option
429 is 2 color options
total of 3 color schemes...
399 is one color option
429 is 2 color options
total of 3 color schemes...
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Posting Guru
Joined: Jan 2008
Posts: 1,661
Likes: 0
From: Bridgewater, VA
Also subscribing for the info. Gene, i love your formulas and such... when i get done with undergrad and into engineering and then diesel tech school, i hope for you to be one of my mentors lol.
Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
That looks pretty dang good!! If you could get another one cheap, use one for the hot and one for the cold sides.
What did you use to cut, grind, smooth? I'm stoked for mor pics!!!
Fleet Mechanic
Joined: Dec 2007
Posts: 1,766
Likes: 8
From: Hutchinson, KS
Dumb question, but what is SOP?
I copied Kris and drilled/tapped my hot side for my MAP sensor line. Haven't driven the truck much since and when I did the roads where horrible, so I don't have any good results to share.
Thread Starter
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Posting Guru
Joined: Jul 2006
Posts: 1,515
Likes: 0
From: Jonestown PA
Well go touch a hot stove for a split second and then read it again! Never trust anyone's "yes" or "no" answer without at least making an attempt to understand for yourself if it's correct or not! In other words don't be like Congress and write blank checks just because someone says "yes" a blank check will "fix" the problem!
Right now I'm working on the "heat transfer" issue, and then I'll take a stab at the "flows more" issue. However both issues are actually interrelated because if the "heat transfer" of the improved spider vs the OEM spider is less the MAT is reduced for a given VAF ft^3/min and this in turn increases the AD=Air Density lb/ft^3 and therefore the MAF={(AD)(VAF)} lb/min into the cylinders.
On the other hand if the improved spider vs the OEM spider has less PD=Pressure Difference psi for a given VAF ft^3/min this increases the MAP psi which in turn increases the AD lb/ft^3 and therefore the MAF={(AD)(VAF)} lb/min into the cylinders. So the improved spider can potentially increase the MAF by deceasing the MAT and/or by increasing the MAP.
To make more HP you need to increase the MAF into the cylinders and then add more fuel. If you just increase the MAF into the cylinders without adding more fuel you might still get a tad more HP due to the enhanced combustion of the same amount of fuel, and you'll also get lower EGT because the additional air mass filling the cylinder gives more total "heat capacity" for absorbing heat ENERGY from the fuel at a lower CAT=Cylinder Air Temperature.
Right now I'm working on the "heat transfer" issue, and then I'll take a stab at the "flows more" issue. However both issues are actually interrelated because if the "heat transfer" of the improved spider vs the OEM spider is less the MAT is reduced for a given VAF ft^3/min and this in turn increases the AD=Air Density lb/ft^3 and therefore the MAF={(AD)(VAF)} lb/min into the cylinders.
On the other hand if the improved spider vs the OEM spider has less PD=Pressure Difference psi for a given VAF ft^3/min this increases the MAP psi which in turn increases the AD lb/ft^3 and therefore the MAF={(AD)(VAF)} lb/min into the cylinders. So the improved spider can potentially increase the MAF by deceasing the MAT and/or by increasing the MAP.
To make more HP you need to increase the MAF into the cylinders and then add more fuel. If you just increase the MAF into the cylinders without adding more fuel you might still get a tad more HP due to the enhanced combustion of the same amount of fuel, and you'll also get lower EGT because the additional air mass filling the cylinder gives more total "heat capacity" for absorbing heat ENERGY from the fuel at a lower CAT=Cylinder Air Temperature.
Its not that I didn't understand the whole touching the stove part it was all the math stuff. I have no clue on all your mathamatics eqations stuff.