Re: Shaker Hood, CFM Comparisons, Questions..Sorry Long

From: durling@ibm.net
Date: Mon Aug 30 1999 - 10:03:58 EDT


For a guy that's doing all of the work himself at home you have come up with a pretty
decent hood. Keep up the good work and keeps us posted. BTW, that is another similar
design that I would consider. The only problem though is that down the road I might put
an SC in and the hood would be useless. I still like the look of a custom hood but not
sure what the future may bring. No offense, but since there is already a proven use of
Terry's hood for the '91-'96 daks if I get one I'll probably go there if I decide on the
hood route.

I also have to ask, Weren't you also involved in the discussion about drawing the heat
out of the engine compartment a couple of weeks ago. I was wondering about grafting the
vents from I believe a '96-'97 Grand Cherokee 5.9 would work. The '91-'96 daks had a
flat hood like the Cherokee and they are already proven to work by DC engineers. Unless
they were fake but I remember readung that they were added because the engine produced
more heat than the 318 so they had to get it out of the engine compartment. Sorry for
the long post just looking for yours or anybodys opinion on this.

Jeff Durling
'96 RC Sport

KURTZ ERIC wrote:

> Check out the nasty pics of my ram air hood. Until paint gets on it
> you wont be able to see the details, but check out the pictures that Jon
> so graciously put on the pic list for me.
> erics5.9@home.com/">http://www.cs.fredonia.edu/~stei0302/www/dakota/attachments/erics5.9@home.com/
> Eric
>
> Jeff Durling wrote:
> >
> > I would also be interested in a somewhat guess for Terry's ram-air hood for the
> > older daks (I know some DML'ers have these). I currently run a 14x3 setup and like
> > the ram-air hood but I am also looking at a quick-d intake. From the chart I would
> > have to go with a 8" cone. If there is not very much difference in the 14x3
> > ram-air hood and the quick-d intake then i'm going with the quick-d only because
> > it's cheaper. Either setup would go well with the stage I tb but I just want the
> > best possible setup for the money. I think that some of the other genII owners
> > would probably be interested to right?
> >
> > GS- wrote:
> >
> > > For those of us seriously considering a shaker hood
> > > in the future. I thought it might be wise to pull in
> > > as many FACTS as possible on the shaker hood design.
> > > Mainly CFM and compare them with say the newer FIPK
> > > (large cone and tube).
> > >
> > > I know there has already been some discussion on looks
> > > and earlier Cuda shaker design efficiency. Some were
> > > a little vague. Basically we can't compare the cone
> > > and the 14x2.5 element because of the different environment
> > > the shaker offers (Ram Air). I'm not trying to scare everyone
> > > away. If its to early to get the facts, I'll settle for a
> > > little theory and or experience. Here are some basics to
> > > start out with anyway:
> > >
> > > 14" K&N 2 1/2" tall: 109.9 Square inches (662.7 CFM)
> > >
> > > 8" cone 138.16 Square inches (833.1 CFM)
> > >
> > > (Cudos to Charles Smith, I'm borrowing his calculations)
> > >
> > > The question now is "What is the CFM (14x2.5)when RAM AIR is added?"
> > >
> > > There has to be tons of variables involved in this question.
> > > so I'll take an average "best guess" from some of the gurus.
> > > Frank, BruceB, Eric, Patrick, Bernd, Shaun?, Charles, Jon?
> > > Bill (Tier), Bob, Doc ? Hehe....Jules...?(shocker!)
> > >
> > > thanks
> > >
> > > GS -
> > >
> > > PS
> > > Just for grins, heres the great post of CONE, FABM's CFM from Charles:
> > >
> > > >
> > > > I have done calculations of a bunch of air intakes. Using info found here:
> > > > http://www.knfilter.com/affacts.htm#SELECT
> > > >
> > > > Here are my findings:
> > > >
> > > > Stock paper filter: 71.875 Square inches (355.78 CFM)
> > > > K&N Drop in filter: 71.875 Square inches. (433.40 CFM)
> > > > 10" K&N 2" tall: 62.8 Square inches (378.84 CFM)
> > > > 10" K&N 2 1/2" tall: 78.5 Square inches (473.35 CFM)
> > > > 10" K&N 2 3/4" tall: 86.35 Square inches (520.69 CFM)
> > > > 10" K&N 3" tall: 94.2 Square inches (555.97 CFM)
> > > > 14" K&N 2 1/2" tall: 109.9 Square inches (662.7 CFM)
> > > > 14" K&N 2 3/4" tall: 120.89 Square inches (728.96 CFM)
> > > > 14" K&N 3" tall (needs mod to rad hose to fit):131.88 Square inches (795.23)
> > > > 6" cone (The one I have) 103.63 Square inches (787.7 CFM)
> > > > 8" cone (I will buy if the need arises) 138.16 Square inches (833.1 CFM)
> > > >
> > > > Here are some more interesting numbers:
> > > >
> > > > (CFM ratings on Bruce and Frank's Throttle Bodies)
> > > > Stage II is around 700cfm. Stage one is around 640cfm. factory is around
> > > > 565 cfm... Havnt been back to ;the bench" in a while, but thats what I
> > > > recall as the breakdown...
> > > > BKB
> > > >
> > > > Charles smith
> > > > 1999 Dakota R/T RC
> > > > 15.0@95 mph (g-tech)
> > > > Ican2u7176@aol.com (or) Dak99rt@aol.com
> > > > http://hometown.aol.com/ican2u7176/index.htm



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