[DeTomaso] COOK ENT EFI INDIVIDUAL BILLET AIR FILTERS

[Paul Timko]

What size are your throttle bodies 48mm or 50mm?  I have a set of the 
wide roll stacks in the 48mm size.

Paul
#9270

Daniel C Jones wrote:
>> Now you might understand my struggle with compromise.  If I'm quoted
>> on something, please understand that it is probably out of context.
> 
> Nice post Mike.  Thanks for taking the time to reply.
> 
>> The velocity stacks that are on Dennis's system are 2" tall in an
>> effort to keep the total length of the system as short as possible
>> and provide the requested "bling".
> 
> Another difference between my set-up and the one you put together for
> Dennis is I'm using the low profile throttle plates and manifold mounted
> injectors.  That's another compromise.  Using the taller TWM throttle
> bodies with injector pockets puts the injector closer to an optimal
> placement for power but the TWM units are considerably more expensive
> and require notching of the decklid.  I was actually leaning towards
> notching the decklid as I like the look of the stacks in the rear view
> mirror.  I changed my mind after running the simulations.  Even with
> the short stacks, the low and mid range torque was better than a plenum
> intake and sufficient for my use on street tires.  I suspect the shorter
> stacks are a better match to my short tube headers as well.  Of course,
> graphs on the computer screen are one thing and seat-of-the-pants is
> another thing entirely so it might be worthwhile to leave the decklid
> off and run with a couple of different stack heights to see how noticeable
> the difference really is.  I'm surprised at the height of some of the
> sprint car stacks.  They are taller than I expected, given the RPM range
> they operate in but they run much larger area throttle bodies which would
> require a taller stack for the same resonant RPM.
> 
>> The large radius velocity stacks like on Dennis's system will not
>> fit inside any of the weber style filter assembles.
> 
> I have Larry's Weber set up here to test.  It has very tall filters
> but they actually trimmed off the bellmouth on the end stacks to get
> them to fit.  Doesn't look like a good thing to do but my guess is
> they needed to trim the overall length of the filters so the decklid
> would clear when raised.
> 
>> The units like Kelly has and the Cook units look great but have
>> performance problems.  I'm stuck in the middle trying to come up
>> with a compromise. Have I mentioned that I hate compromises?
> 
> Any chance we'll be able to test some of this when you come up for
> the dyno runs?  I've got the different stack heights and can run
> with and without the filters in place but I don't have any stacks
> with a larger bellmouth radius.  Given our different diameter
> throttle bodies, our parts won't interchange.  I recall pictures
> you sent with a very fat lip bellmouth and a narrower one.  Were
> those for the same or different applications?
> 
> Dan Jones
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