ripped6 Donating Members 246 Member For: 13y 5m 24d Gender: Male Posted 24/10/12 12:08 PM Share Posted 24/10/12 12:08 PM didnt realise the plenums were so expensive! I'm not sure if the gains will be that great from an upgraded plenum, would need to ask someone who has changed one (could be 20rwkws). I still think you will make good power with your mods, however that intank pump has to go, walbro, bosch or even an FG pump will be a good replacement. there are still other options for more power such as a 0.7 cover for your current turbo ($800-$1000) and a tune on e85. but if you can get full boost around 3000-3500rpm and can hold it to 6000+rpm then it wont matter if you make 350 or 400rwkw as you are going to have a mad time in the car. but I'd be having a good chat with simon, he should be able to give you a ball park figure of what kinda of power to expect and a list of mods that he would recommend in order to increase that figure. 1 Link to comment Share on other sites More sharing options...
josh_hammy Member 192 Member For: 13y 1m 29d Gender: Male Location: Perth, WA Posted 24/10/12 12:21 PM Author Share Posted 24/10/12 12:21 PM Yeah plenums Arnt cheap. And as far as I knew they barely gain more power, just faster spool time and better throttle response? I could be very wrong though.Yeah there are way to many options for my average car knowledge to help me choose the right one.. Haha will chat to Simon shortly and he can let the light shine down on the subject... Thanks for the info ripped definitely got me thinkin! And excited to have power to playyy!!! Lol 1 Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 2m 1d Gender: Male Location: Probably above atmospheric pressure Posted 24/10/12 12:59 PM Share Posted 24/10/12 12:59 PM (edited) Pretty sure you get same power on less boost with the fancy plenums as they flow in better.PS maybe discuss with Simon the GTX on special in Crescent MS thread. Edited 24/10/12 01:00 PM by -SteveR- Link to comment Share on other sites More sharing options...
josh_hammy Member 192 Member For: 13y 1m 29d Gender: Male Location: Perth, WA Posted 24/10/12 01:07 PM Author Share Posted 24/10/12 01:07 PM Yeah that too Steve. And I just saw that thread this arvo which is why I asked if I should bite the bullet or not lol Link to comment Share on other sites More sharing options...
XYZ Donating Members 1,171 Member For: 15y 4m 8d Posted 24/10/12 01:08 PM Share Posted 24/10/12 01:08 PM I would check your exhaust size too.. 3 inch is pretty small for 500rwhp Link to comment Share on other sites More sharing options...
BigAl's04 Special needs member. Bronze Donating Members 690 Member For: 14y 4m 19d Gender: Male Location: gold coast Posted 24/10/12 01:36 PM Share Posted 24/10/12 01:36 PM I wouldn't bother with a plenum for 500hp. Should def go the GTX though. You will still need the exhaust housing ported as they use your factory housing on the GTX. Even if the exhaust is the Xforce 3 1/2" which splits into 2 x 2 1/2" pipes in the rear muffler you may want to replace the rear muffler with a straight through 3 1/2" as where it splits can be a restriction. 1 Link to comment Share on other sites More sharing options...
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