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#16
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Re: Tomsvx Intake for Dummies
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#17
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Re: Tomsvx Intake for Dummies
Don't quote what I said lol, I was just trying to clear up what was said for someone else when I posted that.
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#18
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Re: Tomsvx Intake for Dummies
In theory the exhaust resonator shouldn't affect the performance, only the sound. The tuned length is determined by the cats, anything after that as long as it is not a restriction is only affecting sound. Once again, though, only testing will tell the real tale.
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#19
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Re: Tomsvx Intake for Dummies
The resonator being discussed is the Helmholtz resonator in the intake.
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Disclaimer: The above post is on the internet. |
#20
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Re: Tomsvx Intake for Dummies
oh ok I see
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#21
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Re: Tomsvx Intake for Dummies
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I was referring to Williaty's thread on the 4 cylinder inlet resonance problem. They have overlapping inlet phases, that form a long inlet pulse that is hard to smooth out for the MAF to read properly. To smooth it they use two dead end interference pipes attached to the inlet air pipe. This reduces the amplitude of the main pulse and inserts smaller pulses between them ,to smooth the reading. Removing the standard air inlet pipe and replacing it with a straight pipe, has the two inlet pulses from each side combining into two long pulses like a twin cylinder. To upset the MAF reading at low speed. The SVX has evenly spaced inlet pulses ,that the MAF can read easily. The inlet resonator just removes the last of the sound waves. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#22
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Re: Tomsvx Intake for Dummies
That seems to make sense. Just like we have a nice smooth exhaust note we have smooth intake pulses, thanks to being evenly spaced. Sweet.
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#23
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Re: Tomsvx Intake for Dummies
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Harvey, the first reason to respect williaty's threads and information is that all of his statements are backed up with experiments. I'd love nothing more than to see evidence that the intake resonator is exclusively for our ears, and not for the MAF.
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Disclaimer: The above post is on the internet. |
#24
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Re: Tomsvx Intake for Dummies
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Tom |
#25
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Re: Tomsvx Intake for Dummies
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Quote “ due to the firing order, that has overlapping intake pulses on each side. ”Quote. You say” The exhaust on the 4 cylinder engines is more rumbly due to its exhaust pulse collisions” I don't follow this, you may want to explain that in some technical terms. Also that “as the cylinders on each bank fire following each other”. The cylinders on each side not only follow each other, they have a combined exhaust phase. The exhaust valve on No.1 cylinder opens its EX valve for 240*, when 180* later, the No.3 cylinder next to it opens its EX valve. So, as the first cyl. has 60* of its EX stroke left to go, the No.3 starts its 240* opening. As both of these cylinders exhaust into the same manifold, we end up with one exhaust phase that is 420* long with two peaks in it. This can only be corrected by fitting a header with long branches to separate the two exhaust phases. All flat fours have the same problem. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#26
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Re: Tomsvx Intake for Dummies
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Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#27
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Re: Tomsvx Intake for Dummies
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Maybe if I make it less personal, it'll be clearer? Quote:
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Disclaimer: The above post is on the internet. |
#28
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Re: Tomsvx Intake for Dummies
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I agree removing the SVX inlet resonator that it will not have the same effect that removing the 4cylinder one has. It will only affect the noise level. Harvey.
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One Arm Bloke. Tell it like it is! 95 Lsi. Bordeaux Pearl, Aust. RHD.149,000Kls Subaru BBS wheels. 97 Liberty GX Auto sedan. 320,000Kls. 04 Liberty 30R Auto Premium. 92.000kls. |
#29
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Re: Tomsvx Intake for Dummies
I guess we'll never know until it is tested though.
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Kevin Thomas 1997 2.2ltr Subaru Impreza Outback Sport Wagon (AWD/Auto) 13.03@100mph 1989 2.7ltr Subaru XT6 (AWD/Auto) 15.912@85.93mph 1996 3.3ltr SVX (AWD/Auto) 15.070@91.38mph ***R.I.P*** 2010 RAV4 AWD Sport (13.717 @ 99.19mph ) 2015 Honda Fit LX CVT (15.2 @ 90mph) |
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