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  #1  
Old 04-08-2010, 03:27 PM
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intake plenums

ok so i am wondering if anyone has taken their stock intake plenums and increased the size of the inlet pipe on them? i am considering doing this to make them the same size as the e-99 spyder which is 2.75. does anyone know if this would be a worthwhile mod. I have an extra set of plenums off of a 7.3 to play with so it would not cost me anything but some new 2.75 boots and clamps and a lil pipe.
input and ideas are welcome
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Old 04-08-2010, 04:19 PM
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no one has any thoughts on this???
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Old 04-08-2010, 04:31 PM
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I have my intercooler setup with the E99 spyder and I just kept my stock plenums. Just played hell getting the smaller boots over the E99 inlets. I do have a set of SD 3" plenums sittin in the garage that I plan on using when I have the time to install them.
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Old 04-08-2010, 04:35 PM
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so this may be a worthwhile mod? i have the e99 plenums that came with my spyder
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Old 04-08-2010, 04:39 PM
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IIRC the e99 plenums are the same size outlet as the obs, or am I completely wrong? The only reason I bought the SD plenums is because it is a 3 inch plenum which is larger than the obs
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Old 04-08-2010, 04:39 PM
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got my 3" ones from beansdiesel.com. they were fairly cheap. the e99 spyder should be th same size as the OBS plenums. if i remember right the e99 spyder i used to hav necked down from 3" to 2 or 2 1/4" watever OBS is.
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Old 04-08-2010, 04:53 PM
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Why not just grab a set of SD ones and go to 3"?
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Old 04-08-2010, 04:57 PM
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iicr the spyder is 2.75 i will look for sure tom and yes the e99 ones are the same as the obs ones. and i have alot of time on my hands right now i got laid off and just spent a boatload of money on the truck trying to do cheap/free mods to it as of now lol so i figure i got time parts and soon a welder when it comes in lol so why not try to make em myself plus i like making things myself it is more rewarding i feel
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Old 04-08-2010, 04:57 PM
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Quote:
Originally Posted by DirtyDiesel View Post
got my 3" ones from beansdiesel.com. they were fairly cheap. the e99 spyder should be th same size as the OBS plenums. if i remember right the e99 spyder i used to hav necked down from 3" to 2 or 2 1/4" watever OBS is.
did you notice a difference at all?
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Old 04-08-2010, 04:58 PM
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long as u can weld i dont see a problem. dont want any ventalation holes in ur weld where boost can leak out
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