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Old 10-23-2010, 03:41 AM   #26 (permalink)
max_frontal_area
EcoModding Apprentice
 
Join Date: Jun 2009
Location: pacific southwest
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Quote:
Originally Posted by aerohead View Post
The forward tilting hood is the ultimate objective.Right now I have to remove two handfuls of screws and the blister just to open the hood.Prototypes are like that.No convenience whatsoever!
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The cab/aeroshell gap allows clearance for frame flex inherent in the non-unibody trucks.I'll soften the leading edge of Poco-Loco at some point to help in yaw conditions but I've got bigger fish to fry first.
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The 'cone' inside the grille-block inlet is actually a 'valve' to help regulate airflow volume especially in the winter,when it will actually fully close when the truck is parked.I thought it might help conserve some engine heat,reducing 'cold-start' issues.The inlet to the radiator is air-tight and the engine runs at normal temp,although at lower load do to the reduced drag of the grille-block.So far the computer appears to be smart enough to keep the BSFC fairly constant,where a carburetored truck might suffer.
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I'm not going to be much help to you on the turbo.I'd be looking at serious race cars on that one.You almost need to get a static pressure probe and a good manometer and locate your highest pressure,whether at the forward stagnation point,or maybe even inside a wheel well.Don't know.
I think the bigger issue is rejecting the heat of compression from the compressor section.Does anyone mist the inter-cooler itself? De-ionized/de-mineralized water so zero salt buildup on the core? And no risk to the turbo if there is a plumbing problem?

10-4 on the hood, for me that would be a pita, sompin is always being tweaked under there...

cab/aeroshell gap, yes the flex was ovious, but with your clever sourcing of materials i recon you could have come up with something there as well!?

the grille-block inlet valve is manually adjustable from the driver seat?
you might find that at just the right setting it will cool your intake air
like a carburetors venturi.

on my turbo... it seems most streamliner designers haphazardly place engine air inlets figuring at over 200 mph there will be plenty of air for the engine
only to find they are starving it. some of the brighter teams look into tuning their scoops to work like venturies, effectively cooling their intake charge
and packing more air in the engine.

and that is what i am hoping to achieve but with a vehicle that is not quite as sexy.
yes, i intend to mildly dimple (golf ball) the compressor involute of my turbo
with a small ball nose end mill to introduce xtra mass, and fit it with a housing and duct which will supply cool air from the stagnation point.
i have read that pre turbo water injection is supposed to be quite effective,
however too much water won't flow well through intercoolers!!
yes ppl spray their intercoolers with water although i doubt they are using distilled h2o.
the hip way for racers is to blast it with bottled co2 - much more effective.
but no chance of gettin into green heaven with that method.
traditionally, the additional cooling of the IC is only needed during continued
boost.
i have a slightly different twist in mind, the idea is to supply a the max cool air to the turbo and keep it cooled along the way to the combustion chamber thus maxing out volumetric efficiency (on a 30some yo engine design) so that the turbo is always producing boost. secretly hopin for 5 psi.
the idea is to significantly lower rpm's therefore increase mpg by buring fuel more completely as well as reducing recipocating and parasitc losses - all the while extending engine life. best of all i can go to work without having to fool
computers or sensors

forgot to ask, on your grille-block inlet are you using airflow straightners
between the inlet and the radiator or is the air wild? takes lots of energy
forcing dirty air through lil fins. main reason why i dislike pusher fans.
also is your radiator sealed on its outer periphery, lots of cooling air is wasted
flowing around it, if you adress that you could effectively close your "valve" a bit more.
never cared for the looks of the t-100. i do now!

Last edited by max_frontal_area; 10-23-2010 at 03:55 AM.. Reason: forgetfulness
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