[s-cars] RE: Dawson's Dreadnaught and FMIC Testing (and fire sale)

[CaptMagu at aol.com]

Gary, Gary, Gary

What are we going to have to do to convince you here.

In a message dated 11/9/04 12:45:45 PM, gary.m.lewis2 at boeing.com writes:


> Howintheheck(tm) do you test that?  Temp sensors on various points of
> the outside of IC?  Put your hand on it?  Straight test data, total
> input/total output? (pressure loss, cooling, etc...).  If your IC (vert
> or otherwise) has great efficiency and great pressure loss, how can you
> deduce that the flow isn't evenly spread?  I'm serious.  I believe you
> guys, but how do/did you figure this out?  Trial and error?  I mean you
> are introducing another flow impediment (vanes), so pressure loss goes
> up.(?)  I'd think bigger end tanks canted at a proper angle would be
> much more efficient (ala the RayT link).  This is what Spearco did, and
> he had flow benches.  Just talking out loud here.  This isn't a
> challenge, I'm really curious...
> 
Using a readily available infared pyrometer, of the type used to measure tire 
temps, the APR boys had empirical datat that they had a major hot spot and 
that the entire I/C was not being used. When they added the vanes, they had a 
much more even flow. Who cares if the restriction was increased when you get 
full use of the core?
> 
> > I think that side to side is still the way to go because it allows the
> 
> > largest cross section to be mounted given the limitations on top to
> bottom 
> > dimension. The end tanks on top to bottom designs is lost core cross
> section. You know 
> > aht they say about opinions? They're like belly buttons, everyone has
> one.
> 
> IMHBBO (IMHBellyButtonO), the RayT bumper solution really reduces this
> issue to a nit, as you can easily run a 21 x 6 x 3 (as he has done), or
> converting that to horizontal, something VERY similar to your IC, with
> at least a 12 in high core.  Either is more than adequate for +500 hp.
> 
Using your dimensions for Ray's core, I come up with 378 cubic inches. 
According to the Garrett I/C core spec sheet that I have that's only good for about 
250hp as I interpolate using 3" deep cores as a comparison. My core comes out 
to 960 cubic inches and that's good for about 500hp. Now this data is for 
Garrett cores that use bar-plate construction. As Dave Jones, Mike Pederson and I 
investigated various cores there was a significant diffence in quality and 
construction. Some of the fin and tube designs would obviously flow better but 
did little to apparently cool the charge air. The Garretts were significantly 
heavier with all the extra cooling fins inside the hot flow tracks as well as 
outside.
> 
> I'm dying to see the CO boys IC test results, see how
> accurate/inaccurate MY belly button is.  :^)
> 
More to follow. Dave's PBMAF should be ready to mount up sometime next week 
which will dovetail nicely with the completetion by Mr Stone of Will Griffin's 
side to side, STS(tm) FMIC.

Hap, wit moh dahkine than anyman should have in Evahboost, Maguire