http://cgi.ebay.com/ebaymotors/2004-...02048035QQrdZ1


I do not see how a spacer could give any of the stated performance gains.

 

If it sounds too good to be true.........It's probably is :D

Listen too your gut....if Mazda could get HP with something simple like that....don't you think they would use it :D

 

sure...22HP...and if you bolt on a huge aluminum spoiler and a coffee can muffler can, you get another 50 HP!!!! :D lol

 

i just think it is criminal to post stuff ads like that.

 

I do not see how a spacer could add any value

 

maybe someone step up, be brave, be a lab rat ... I mean a tester for all of our 8s? :D

 

i don't understand what the spacer would do to add the hp? they don't even explain it on the site they just say adds hp and all that other stuff

 

it cant.
caviat emptor.

beers

 

About as effective as a tornado (which is not at all).

 

Look at all the complexity of the intake system Mazda engineers designed in order to tune the path lengths to optimize resonance charging. Then ask yourself if altering that with a spacer is a good idea. Hint: NO!

 

THis is what Ford would reference as HSC.....High Swirl Combustion. This was on some of the 2.3L inline 4 engines in the mid 80's or so. The HSC is "suppose" to allow for better air~fuel mixture. Does it do anything...doubtful. I would surmise that the Swirl affect will be lost because it is placed to far from the intake ports and the swirl inducers are to small.

 

This from the ebay posting makes me sick:
Look At These Benefits: Up to 22 hp gains* Up to 4 miles per gallon gains*
Up to 25 ft lb gain in Torque*

Damn, why didn't racing beat figure this mod out 1st?

 

Actually, phenolic spacers, between the block and the intake manifold, have been used on piston engines with success for some time now. The idea is that the phenolic material reduces the heat transfer from the block to the manifold, lowering intake temps. I have also heard of these spacers being used on throttle-bodies with somewhat less success.

That being said, this certainly doesn't look like that type of spacer, plus the intake runners are plastic anyway.

 

"The High Swirl Combustion came from a design in the cylinder head that compressed the air/fuel mixture into a rapid swirl and directed it right to the spark plugs. This design allowed for the engine to receive more kick out of each droplet of fuel."
from http://www.wu-wien.ac.at/usr/h97d/h9750559/tempohis.htm

This spacer has nothing in common with Ford's HSC

 

The only reference is that Ford's HSC and this spacer are both attempting to do the same thing, provide a more erratic air flow for better fuel atomization.

 

These have some applications that these can be helpful. If the intake manifold is pretty small, and you lack low end torque (like Honda engines) you can add a TB spacer to give it a bit more mid range, at the expense of some top end I believe....

 

Sure. Its well-understood that changing the length of the intake maximizes power at one particular rpm point. The 787b had telescoping trumpets to take advantage of that. But we already have a variable length intake system that is well optimized. The only advantage I see to a spacer is reduction in heat transfer from the block to the manifold.

 

Some Mazda 6 guys pointed out to me a hot water line that runs from the block to the throttle body. I suppose this is for cold weather purposes, but restricting this would be a better start at reducing heat transfer.

 

If any of you guys buy this thing, let me know. I'll sell you a c an of audiophile transparency spray that will enhance the soundstage of the Bose audio system. It pulls back the veil of cloudiness masks the sonic transcendences in the car. It offers a more realistic open tonal reference for just $200 per application.

 

These Spacers are good for the MACH mustangs...they add some HP...from what i hear on the forums...i doubt any gain will come from it on a rotary engine

 

Anybody wanna buy a bridge?

 

The thoeries about spacers and fuel atomization don't make much sense to me when talking about port-injected engines where fuel vapors are not making the full trip through the manifold. Spacers like the one from E-Bay and the one made for the 350Z typically show benefits at higher RPM's due to larger plenum volume. As others have stated in the past, engines(most especially rotaries) depend on intake charge velocities to assist in achieveing maximum volumetric efficiency at a predetermined RPM. As I currently have a project going where the intake manifold is involved I have paid close attention to the way the Renesis's plenum size/runner length varies throughout the RPM range thanks to the vacuum diaphragms and solenoids. I can see where the spacer works for the Z as the top of the plenum is limited by the hoodline. On the RX-8, however, I doubt a small spacer will show any gains because of only incremental gains made in overall plenum volume. One thing I find curious about the import industry with regard to intake-related matters is that the value of velocity stacks and smooth transitions is only lately being discussed when we domestic guys have known this for 25 years when K&N firat made their "Stub Stack".
CRH