Guest

Stumbled across this on ebay looking for something else, a little different than ones I've seen in the past. Thought I'd throw it up here. Price seems a bit steep with the HSR out there, but obviously this thing sits a lot lower with a short plenum like that.

http://cgi.ebay.com/ebaymotors/ws/eB...m=170494647479

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iTrader: (14)

defiantly interesting. Wonder if it works

HCR13

iTrader: (5)

its ok, but I wouldn't pay that much for it, specially when they could have done alot better with the FPR instead of hacking up a stock tpi one...

anesthes

iTrader: (12)

While similar to the HSR, I'm guessing it probably gets pretty crappy air distribution.

-- Joe

Twin_Turbo

iTrader: (25)

It's an Edelbrock TR1 with a custom upper plenum and someone welded bellmouths/radiuses to the tops of the inside plenum.





Why would it get crappy distribution? For all you know it might work pretty damn well. There's plenty of height in the upper plenum box to unshroud the rears and the way the TB is attached a little higher in the front might give it some good distribution. Without testing there's no way to tell.

anesthes

iTrader: (12)

I'm not going to argue with you. But for the other readers, I've modeled many intakes and built my own. It's very hard to get any horizontal draw intake to produce even air distribution, and the way that lid is designed the rear is going to run rich.

Even GM realized this, which is why most modern (mid 90s onward) horizontal draw applictions have a cylinder injector pulsewidth offset to richen or lean out the effected cylinders.

I have some data I can provide showing how airflow rounds the curve on a horizontal draw and then down the runner under vac applied to the bottom of the runner. (Thanks MIT). Depending on the radius of the curve, the air tends to flow on the outside of the bend. The inside creates a void which reduces the flow.

A direct flow port intake (think singleplane) is the better route assuming you can supply an ample amount of air to the 'box' or general area above the throttle blades.

-- Joe

Twin_Turbo

iTrader: (25)

I know airflow favors the long side radius and how intake design works, I'm just saying that without testing there's no sure way to tell whether it works or not.

I have some pics somewhere of an old Ferrari F1 engine that used an air box much the same as that one, with the box front fed above the drivers head. Sure enough the throttle blades were located in each respective runner but with the blades open anddismissing the effect of them sitting in the bores, the setup is a lot like that (albeit a little taller) and for them it worked.

In this system it could very well be that the front cyls run rich and not the rears because of the angle of the TB and the angle towards the TB for the fronts in respect to the rears. Without testing it's just a debate and a matter of opinion.

Here's the pics from the ebay add so we don't have to surf there





Here's an intake from a Rover V8. Similar design w/ diff length tubes to tune for powerband/runner lengths. Note the cover lying next to it w/ side feed TB

Guest

You know, I saw one of these just a couple months ago... again, looking for something entirely different. Maybe I'm supposed to be looking for a TR1 instead.

BTW here's what the inside looks like before someone messes with it and fills it full of oil, gas, other debris

anesthes

iTrader: (12)

Do you think those horns are for runner length, or to deal with air distribution? It looks like the lid goes on and the inlet is in the center, where the taller more restricted tubs would be. yet the farther away tubes have a lower profile to aid in airflow transition.

-- Joe

Guest

The lid is behind it, its curved on the top. The clearance above the tubes should be close to the same, it appears.

Twin_Turbo

iTrader: (25)

Ever seen a calleope mech FI setup? Same principle. MadMax is right, the plenum cover is curved, same distance between bellmouth and plenum roof. The length diff is for tuned length runners.