Went to the site
I went to the Honda North America Website, and they don't have an e-mail link, so we'll have to draft a letter as a collective site, or even better, use your connections if you can work them.
One problem -- they'll want you to buy OEM equipment because that's what they designed for the vehicle, and the dealer repair/parts network is important to the organization -- so it might get political. RH77 |
exhost
Well guys it works in a couple of ways - there are equations that calculate the length of the pipe to give proper tuning as a function of the cylinder displacement and pipe diameter to get proper extraction effect. Valve timing can really affect how it performs because back pressure with intake and exhost overlap vs no back pressure and valve overlap can cause different amounts of discharge gases remaining and different amounts of fresh charge getting into the cylinder thus affecting efficiency. Best to have very little restriction and the valves set to not allow intake charge from getting out the exhost before it goes through a power cycle and gets burnt. Big thing is to have the length and diameter correct so that you get an extraction effect from the prior exhost pulse helping the next exhost cycle pull the gasses out of the cylinder. Of course at low throttle this does not matter as much Oh and you can tune it for RPM so pick your operating speed!
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I think we could just
I think we could just inquire about the design choice and tie it into their environmental commitment and say we love your design, but we were wondering about a civic ex exhaust on our civic vx.
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Re: exhost
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RH77 |
Valve timing is a sticky
Valve timing is a sticky wicket.
Unfortuneately I can't do much on the front of calculating exhaust unless were talking about turbos, however, I can find us something out about cam timing. I have actually been thinking about that a lot lately and that's my next area of research, so we'll see. |
Re: Valve timing is a sticky
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RH77 |
VTEC
AS I recall the VTEC opens valves more and with different timing at higher RPM so just quit reving it (yeah like that will happen) and you should be able to get good economy. Make sure your header pipes are the same length for each cylinder and are free flowing and pick your muffler to suit your noise lever. My firent with the F150 also has a Honda and used to work for Honda so I will ask him about exhosts. He has the VTEC in his Prelude.
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You've got the concept of
You've got the concept of vtec pretty well. rh77 doesn't have it, :p, neither do I, though I will soon!
I'm excited, vtec is the shizzle, y0. |
Re: VTEC
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So my it's for the DOHC 1.8L Non-VTEC(B18B1) engine (Integra). So, there's the piping from the header, a CAT (which is still good -- gets to stay), a resonator, muffler, more piping. Smaller/larger diameter, replace the header (what style), muffler type??? I'd hate to spend the money on something that kills my gas mileage, because once it's installed, its in there until it breaks. RH77 |
Re: You've got the concept of
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RH77 |
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