Skeptical of "blade" exaust tip FE / emissions claims

[diesel_john]

Well the 1/4 NPT hole is in the other side. Here shown with a gage in the hole. Had a helper hold the flapper valve shut and could only get 1 psi pressure in the exhaust system before the engine became noticeably loaded. O2 sensor is in the crossover. So far seems to give good bottom end torque. Haven't got data on a try at lean burn. (Gas got too high to test)

H pipe

A restriction should decrease volumetric efficiency. right. i want to make my engine smaller not bigger.

[jpgmtech]

Originally Posted by Duffman

So does opening up the VVT result in less boost then or more?

Open VVT creates less boost, allows more total exhaust flow. But the turbo also works off of heat, so high fuel rates=more boost as well.

[jpgmtech]

Originally Posted by tasdrouille

Who's got a dual exhaust on his N/A daily driver and can keep it below 3000 rpm and light/mid loads most of the time?

Could you please plug one of the ends real good and drive for a while like that? Then report back with results on low end torque (seat of the pants) and FE.

Thanks

And note the type of dual exhaust too, H-pipe, X-pipe, common muffler, or isolated full dual exhaust.

[tasdrouille]

Well, I researched this a bit and there is sound theory behind this thing.

Ehxaust throttling have been shown to increase FE and reduce emissions at low rpm / low loads by increasing internal EGR, that is having an increased residual gas fraction staying in the cylinder taking up space that would otherwise being filled by fresh air. The residual gas fraction being gas products of late combustion, they contains the most NOx and unburnt HC.

Exhaust throttling also increase the pressure and temps in the exhaust system. This could probably also help getting your cat to efficient operating temp more quickly.

The downside is the increased risk of knock as the residual gas fraction increase.

[LostCause]

First off, this thing is pure BS (rational response, I know...).

Secondly, I don't know why anyone would want to pay $150 for a stainless steel tube with a bunch of fiberglass mesh wound up inside. The profit margin that thing must command keeps me disinterested, even if did what it claims.

Exhaust throttling sounds interesting, but can't the same be done through the EGR valve? Causing a restriction in the exhaust line is going to increase pumping losses.

I'm also lost as to how a restriction will increase VE. The only theoretical way would be utilizing Helmhotz resonance, but the catalytic converter already creates significant backpressure and the constriction would have to be sized ("tuned") to every vehicle individually. Generally, scavenging is already done through early opening of the exhaust valve.

If you want your catalytic converter to heat quickly, hack it off and reweld it so the intake tube is positioned obliquely. An angled intake tube will increase the surface area the exhaust gas strikes as it first enters the converter.

- LostCause

[ankit]

The offspring of the blade and turbonator....
http://cgi.ebay.com/ebaymotors/Exhau...ayphotohosting

This tornado like vortex causes a powerful vacuum inside the exhaust system which helps expel your exhaust gases faster and more efficiently.

[8307c4]

Ohhh yeah but you see my Furzelarator solution gives you 100% better mpg by reducing your car's fuel consumption to ZERO and I only want $10 for mine!


NO installation required!
Nothing to do, ever!
Ships as soon as you pay!

[ankit]

Originally Posted by 8307c4

Ohhh yeah but you see my Furzelarator solution gives you 100% better mpg by reducing your car's fuel consumption to ZERO and I only want $10 for mine!


NO installation required!
Nothing to do, ever!
Ships as soon as you pay!

Can I have your paypal address, I would like to send payment asap for this product.

[RH77]

Dual feature action!

Full-throttle operation results in "Ninja Star" action! Be your own neighborhood's 007 with this option!*

*May result in replacement of device. Not legal in some states. The blade-O-nator and it's parent company, Exxon/Mobil, is not responsible for any damages.

[Cd]

Hey folks : I've been really lazy lately.
I will try to contact these people for any follow up info.
It's on my 'to-do' list.