smaller ports, better?
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Re: Re: smaller ports, better?
Smaller ports are the way to go, unless your running WOT 98% of the time, and only using the car for drag racing.
The smaller the port the higher the volumetric effiency, thus more power @ lower rpm compared to the same engine with large ports. The smaller port will give more of a useable power band.
The smaller the port the higher the volumetric effiency, thus more power @ lower rpm compared to the same engine with large ports. The smaller port will give more of a useable power band.
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Re: Re: Re: smaller ports, better?
Originally posted by Levi
Smaller ports are the way to go, unless your running WOT 98% of the time, and only using the car for drag racing.
The smaller the port the higher the volumetric effiency, thus more power @ lower rpm compared to the same engine with large ports. The smaller port will give more of a useable power band.
Smaller ports are the way to go, unless your running WOT 98% of the time, and only using the car for drag racing.
The smaller the port the higher the volumetric effiency, thus more power @ lower rpm compared to the same engine with large ports. The smaller port will give more of a useable power band.
:sigh: you post a LOT of crap...
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Basically you want the most flow with the smallest ports you can get. If you have two heads that both flow 300 cfm...but one is a 200 cc port and one is a 230 cc port. Tha smaller port should make more power throughout the rpm range.
But to say smaller is better in general is somewhat misleading. It all depends on the apllication, target rpm range etc etc.
But to say smaller is better in general is somewhat misleading. It all depends on the apllication, target rpm range etc etc.
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Basically what I got from the article was that some ports come oversized from the factory- then people run out and oversize them even more...assuming that it's going to improve performance. But what happens is they figure since they are doing the porting...might as well do the other internal performance stuff at the same time. Then they attribute the net increase in performance partially to the larger ports, when in fact, they may have reduced performance. But it's masked by the other work done.
He had taken stock heads and reduced port sizes, and got improved performance. That's all I was getting at (:
He had taken stock heads and reduced port sizes, and got improved performance. That's all I was getting at (:
teh clit wiggler
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correct me if im wrong...
so to better use the available power during normal driving in a 6port..... leave it the way it is and port the auxiliaryport bigger so to have more power at WOT?
lets have more info on this thread please
so to better use the available power during normal driving in a 6port..... leave it the way it is and port the auxiliaryport bigger so to have more power at WOT?
lets have more info on this thread please
teh clit wiggler
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Re: Re: Re: Re: smaller ports, better?
Originally posted by PseudoRealityX
and you came up with this logic where?
:sigh: you post a LOT of crap...
and you came up with this logic where?
:sigh: you post a LOT of crap...
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Originally posted by HybridSS
Basically you want the most flow with the smallest ports you can get. If you have two heads that both flow 300 cfm...but one is a 200 cc port and one is a 230 cc port. Tha smaller port should make more power throughout the rpm range.
But to say smaller is better in general is somewhat misleading. It all depends on the apllication, target rpm range etc etc.
Basically you want the most flow with the smallest ports you can get. If you have two heads that both flow 300 cfm...but one is a 200 cc port and one is a 230 cc port. Tha smaller port should make more power throughout the rpm range.
But to say smaller is better in general is somewhat misleading. It all depends on the apllication, target rpm range etc etc.
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This guy is right on. First generation 4g63 motors have intake ports that are too large. The second generation motors have ports that are about 35% smaller. all the material was added on the port floor. The small port heads are also on the EVO cars.
Funny that most 2g guys think they are upgrading trading for 1g heads.
Funny that most 2g guys think they are upgrading trading for 1g heads.
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Naturally Al (Hybrid SS) is correct.
But PappaSmurf saying velocity is king, especially with forced induction.
You DO realize that forced induction by its very nature increases velocity and usually on a forced induction setup erring on the side of large ports is better, because you have a compressor to fill up that port and maintain a decent velocity.
But PappaSmurf saying velocity is king, especially with forced induction.
You DO realize that forced induction by its very nature increases velocity and usually on a forced induction setup erring on the side of large ports is better, because you have a compressor to fill up that port and maintain a decent velocity.
