hmmm... i've seen corolla's with stickers tath say "20 valve". how exactly is that supposed to work. i know a regular twin cam 4cyl. engine is a 16. but 20 valve, is the engine supposed to be a 5 cyl. or something? someone plz explain.
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20 Valve?
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Actually in the toyota engine its 3 intake valves. and 2 exhaust. See ultimately you want to let as much air into an engine as possible so you want a huge intake valve, but the bigger the valve the slower the air moves threw it, so they went to dual intake valves and exhaust valves. Basicly the 5 valve per cylender is a further take off on that. Im sure some 4age guys could give you a more detail and better to how it works and how its superior. but it seems to produce similar power per displacement as Honda's Vtec motors.
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Originally posted by nissanguy_24
Actually in the toyota engine its 3 intake valves. and 2 exhaust. See ultimately you want to let as much air into an engine as possible so you want a huge intake valve, but the bigger the valve the slower the air moves threw it, so they went to dual intake valves and exhaust valves. Basicly the 5 valve per cylender is a further take off on that. Im sure some 4age guys could give you a more detail and better to how it works and how its superior. but it seems to produce similar power per displacement as Honda's Vtec motors.
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Re: 20 Valve?
Originally posted by Ripper
hmmm... i've seen corolla's with stickers tath say "20 valve". how exactly is that supposed to work. i know a regular twin cam 4cyl. engine is a 16. but 20 valve, is the engine supposed to be a 5 cyl. or something? someone plz explain.
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Yeah, most engines that have 20 valves I think are 3 intake and 2 exhaust, but I have seen a few that are the other way around. VW even had a comercial a year or so ago that had a whole 3d engine, and they explained how 5 valves work, instead of 4. It was suppposed to be some new thing I guess for VW.
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Re: Re: 20 Valve?
Originally posted by CRASHDRIVE
http://www.club4ag.com/faq%20and%20t...ifications.htm
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