 IR vs. Plenum?, Bonafide dyno tests anyone? |
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| jhadler |
 Jan 17 2006, 05:10 PM
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Long term tinkerer...  Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529  |
Hey all,
I realise that this may have been hammered at before, but I was currious if, on a stock 2.0L, there was any distinct advantage of going to IR throttles over the stock plenum (or some other single throttle plenum). I know that the stock cam will limit the amount of air the engine can ingest, and that IR throttles will definitely NOT be the limiting factor on the top end, but with tall manifolds, and IR throttles, can a stock 2.0L run better than it could with the stock intake plenum. Assuming that both are running a programable fuel injection system that has been optimized. Thought? Experiences? Test data? Dyno results? (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) -Josh2 |
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| Bleyseng |
Jan 17 2006, 09:19 PM
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Aircooled Baby! Group: Members Posts: 13,036 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I thought that only mattered at wide open throttle. I thought one of the benefits of a plenum was the other cylinders were keeping the air flow into the plenum so it is "forced into" past the valve some. You don't get that with IR so you lose some torque.
(IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) |
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Posts in this topic
jhadler IR vs. Plenum? Jan 17 2006, 05:10 PM
lapuwali Pure speculation and second guessing:
Several peo... Jan 17 2006, 05:20 PM jhadler Cool.
So, distilling this question a little more... Jan 17 2006, 05:45 PM DNHunt Josh
You say stock internals but, you didn't ... Jan 17 2006, 06:46 PM jhadler Yup, stock internals, but everything else (short o... Jan 17 2006, 07:04 PM Bleyseng Definately the cam would hold you back as its setu... Jan 17 2006, 07:05 PM jhadler ... Jan 17 2006, 07:10 PM Bleyseng atleast better valve springs?
valve stem keepers? Jan 17 2006, 07:27 PM Jake Raby I did this test in October. On a 2270 "Daily Drive... Jan 17 2006, 08:27 PM Brett W Josh
For what you are needing, IR will be much be... Jan 17 2006, 08:47 PM lapuwali However, the original point was that the cam could... Jan 17 2006, 08:47 PM Brett W Yes, IR will have it over the stock plenum. Measu... Jan 17 2006, 08:57 PM Dead Air <... Jan 17 2006, 09:23 PM jhadler ... Jan 17 2006, 10:04 PM Jake Raby 
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