How can a spacer give this type of performance
#1
How can a spacer give this type of performance
http://cgi.ebay.com/ebaymotors/2004-...02048035QQrdZ1
I do not see how a spacer could give any of the stated performance gains.
I do not see how a spacer could give any of the stated performance gains.
#10
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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!
#11
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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.
#12
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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?
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?
#13
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.
That being said, this certainly doesn't look like that type of spacer, plus the intake runners are plastic anyway.
#14
He's as bad as Can
Originally Posted by Jaguar_MBA
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.
from http://www.wu-wien.ac.at/usr/h97d/h9750559/tempohis.htm
This spacer has nothing in common with Ford's HSC
#15
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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.
#16
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....
#17
Originally Posted by Beodude123
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....
#18
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Originally Posted by tuj
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.
#19
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.
#20
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Originally Posted by tuj
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.
That being said, this certainly doesn't look like that type of spacer, plus the intake runners are plastic anyway.
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
#22
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
CRH
Last edited by Charles R. Hill; 01-02-2006 at 05:28 PM.
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