Dirty32 Legendary member!! Donating Members 1,739 Member For: 17y 10m 23d Gender: Male Location: Dianella, West Oz Posted 10/06/08 02:48 AM Share Posted 10/06/08 02:48 AM Hey all - Just a quick question to help me make a decision on an upcoming purchase.I have had a look through the last 9 or so pages in the induction section and havent been able to find anything except the "which one is best" threads.My question is - At what level does an aftermarket plenum become a worthy addition to our cars?Is there a point in running an expensive plenum with a stock bottom end (not F6 rods)? Is it pointless if im not looking to run over 14 psi?Iv been told by a tuner that if im not looking to run 15psi or more, the plenum chamber wouldnt be filling with enough air...Id like to hear a response from those that have first hand experience and have invested in a plenum and can provide results!Cheers guys!! Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 17d Gender: Male Location: @ my laptop Posted 10/06/08 03:20 AM Share Posted 10/06/08 03:20 AM Iv been told by a tuner that if im not looking to run 15psi or more, the plenum chamber wouldnt be filling with enough air... It is wasn't filling with air, your motor would be running with vacuum............No boostA plenum is normally used in higher horsepower levels, but just by fitting the plenum, you will be shorteneing the charge piping which means the car should spool up a bit quicker Link to comment Share on other sites More sharing options...
Dirty32 Legendary member!! Donating Members 1,739 Member For: 17y 10m 23d Gender: Male Location: Dianella, West Oz Posted 10/06/08 03:47 AM Author Share Posted 10/06/08 03:47 AM Hahaha - ratter... I thought he was trying it on, at least it would be filling with some air but might not be so efficient running on low boost...I understand the shortening of the inlet tract and the benefits of this and paired with a good cooler setup it will always have a benefit over the stock setup.I guess what im asking then is would you deem the mod worth the money if you are running 14psi or under or only running stock internals...Is the money spent better elsewhere (again depending on mods that you already have).Cheers though. Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 18y 6m 17d Gender: Male Location: @ my laptop Posted 10/06/08 04:30 AM Share Posted 10/06/08 04:30 AM Hahaha - ratter... I thought he was trying it on, at least it would be filling with some air but might not be so efficient running on low boost...I understand the shortening of the inlet tract and the benefits of this and paired with a good cooler setup it will always have a benefit over the stock setup.I guess what im asking then is would you deem the mod worth the money if you are running 14psi or under or only running stock internals...Is the money spent better elsewhere (again depending on mods that you already have).Cheers though.Probably better off spending money elsewhere, but get a few other opinions first Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 10m 7d Gender: Male Location: SW Sydney Posted 10/06/08 04:34 AM Share Posted 10/06/08 04:34 AM I've managed 300+ on the stock plenum os it depends on th epower you are after and how easy you want your engine to do it. I would onlny get it if you are looking to expand in the future. Myabe you start with 300, but want to go to 350-400+ in the future, this would save time and money. Link to comment Share on other sites More sharing options...
AzMahoony Hench, but no longer shredded or tanned. Member 3,343 Member For: 17y 8m 17d Gender: Male Location: Canning Vale, W.A Posted 10/06/08 04:35 AM Share Posted 10/06/08 04:35 AM (edited) Plenums are wank factor unless you're looking for 400+ rwkwCheck Muaz's F6 for instance. stock plenum and it's got the 1/4 record Edited 10/06/08 04:36 AM by AaronXR Link to comment Share on other sites More sharing options...
veczar Gold Platinum Member Member 1,081 Member For: 20y 5m 18d Gender: Male Location: Victoria Posted 10/06/08 05:02 AM Share Posted 10/06/08 05:02 AM (edited) I don't know at what levels most tuners would ask you to buy one but a lot of guys are happily running well over 300rwkw without one. Edited 10/06/08 05:03 AM by veczar Link to comment Share on other sites More sharing options...
turbotrana Member 2,586 Member For: 21y 8m 14d Gender: Male Posted 10/06/08 05:13 AM Share Posted 10/06/08 05:13 AM I think most people get them cause they look nice and are shiny and they like to get people to look at their engine bay and get them to say Holy deary me, you must have a fast engine cause you have this shiny thing sitting on top of here and it looks like it was expensive and a big machine had to make and sh*t like that.It would be good to do a comparison and there are certainly advantages even at sub 400kw power levels, but I think most that I have seen for the XR6T are using old tech theories in their design and whilst they work well (but not optimal), there has been no real R&D behind them. IMO the Nizpro one would be ranked the highest in the design aspect. Link to comment Share on other sites More sharing options...
Dillz Three pedals are better then two.. Donating Members 15,637 Member For: 17y 6m 19d Gender: Male Location: Melbourne Posted 10/06/08 05:21 AM Share Posted 10/06/08 05:21 AM I've managed 300+ on the stock plenum os it depends on th epower you are after and how easy you want your engine to do it. I would onlny get it if you are looking to expand in the future. Myabe you start with 300, but want to go to 350-400+ in the future, this would save time and money.Had a few brews mate? Or maybe reading to many posts by the Chief, lolAlot of people are running over 300 with the stock plenum's aren't they? I like the idea of swapping the throttle body over to the other side but that never really took off. Link to comment Share on other sites More sharing options...
senna_T Forged Member Lifetime Members 15,818 Member For: 17y 10m 7d Gender: Male Location: SW Sydney Posted 10/06/08 05:24 AM Share Posted 10/06/08 05:24 AM fark that was a shocker! I've had 3 days off ya know... Link to comment Share on other sites More sharing options...
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