TehNoob New Member 4 Member For: 11y 4m 2d Posted 12/04/17 06:01 AM Share Posted 12/04/17 06:01 AM Not really sure where to post. To cut it short I have a GT3582 (FG F6 turbo) which I have ready to bolt onto my car. I was wondering if I should upgrade the compressor wheel or highflow the turbo to chase for that extra bit of power. I have been told that highflow'd turbos do not like back pressure and I plan on leaving my car with a stock catback (will have flapper mod and 4" dump etc) and in so was wondering if that would hurt the relibility or durability of the turbo. For details sake I have the following modifications on my FG MK2 XR6T: - Turbo side intake & battery relo - Process West Stage 2 Intercooler - 1000cc injectors - Walbro 460 Intank - 4" dump and cat (to be fitted currently have Venom bolt-in cat) - Flapper mod on rear housing - Valve springs - 12 psi actuator (to be fitted once the F6 turbo is fitted) I was chasing more of the 400rwkw (do not want to do head studs to my car). Otherwise I would be sort of happy having 360rwkw on the stock fg f6 turbo. Link to comment Share on other sites More sharing options...
masda74 To Loud Gold Donating Members 4,112 Member For: 13y 1m 1d Gender: Male Location: WA, Perth Posted 12/04/17 06:30 AM Share Posted 12/04/17 06:30 AM If I recall correctly, if you keep the stock cat and exhaust on the car, you are restricted to 350/360kw. Can the guru's of the forum confirm? You may want to rethink the cat and exhaust if you want to hit 400rwkw. Link to comment Share on other sites More sharing options...
discostig Manual mode ________________________ All day, erryday Donating Members 13,798 Member For: 17y 1m 8d Gender: Male Location: Probably above atmospheric pressure Posted 12/04/17 02:29 PM Share Posted 12/04/17 02:29 PM 8 hours ago, TehNoob said: - 4" dump and cat (to be fitted currently have Venom bolt-in cat) He's got a cat upgrade coming already, the factory pipes after the cat (cat back) will probably not help you getting 400 though being they are what, 2 x 2.25" still? Or are they larger twin pipes than the B series? Link to comment Share on other sites More sharing options...
grandpa_spec Member 52 Member For: 13y 2m 18d Gender: Male Location: Pakenham Posted 12/04/17 08:07 PM Share Posted 12/04/17 08:07 PM I got 366rwkw with same mods on stock exhaust hi flow cat, then I put full 3.5 stainless and intake got 454rwkw (e85) Link to comment Share on other sites More sharing options...
Christov Member 16 Member For: 13y 3m 24d Posted 12/04/17 11:46 PM Share Posted 12/04/17 11:46 PM Stock cat will start to restrict between anywhere from 270rwkw onward (as it did on my car). If you upgrade the turbo and high flow it, you should upgrade your exhaust at the same time. You don't have to do the dump pipe, the factory one can and has held it's own around 400rwkw with a high flow cat and cat pipe - as well as an upgraded cat back exhaust. It's horses for courses really. Car's on the same dyno, same day with exactly the same mods have made 25rwkw more than mine did. Link to comment Share on other sites More sharing options...
TehNoob New Member 4 Member For: 11y 4m 2d Posted 01/05/17 04:08 PM Author Share Posted 01/05/17 04:08 PM Okay just an update. I now have my hands on an XForce 4" turbo back SS system. 4" dump, 5" cat, 4" catback to big single 4" tip after the rear muffler. I also have dropped my FG F6 Turbo (GT3582R) off to get highflowed with a billet 61mm wheel while retaining the factory .50 AR. Hopefully this nets me 380rwkw or so I guess we'll see once I get the car retuned Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 12y 7m 28d Gender: Male Location: Central Coast Posted 02/05/17 12:51 AM Share Posted 02/05/17 12:51 AM Sorry to say bud the 61mm wheel on the f6 turbo isnt a "high flow" Its just a billet wheel, the 64mm-82mm and the 66mm-84mm are the proper high flow wheels. I Made 440rwkw on your exact turbo though so its a pretty good setup. 1 Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 16,012 Member For: 9y 11m 3d Gender: Male Location: South Australia Posted 02/05/17 12:55 AM Share Posted 02/05/17 12:55 AM That or a genuine gtx wheel. All of which are better suited to a .7 compressor housing.. 1 Link to comment Share on other sites More sharing options...
MattyP MattyP Cruise Control 6,317 Member For: 12y 7m 28d Gender: Male Location: Central Coast Posted 02/05/17 12:56 AM Share Posted 02/05/17 12:56 AM The gen 2 gtx wheel is a 64mm wheel now though, The gen 1 is a 62mm if I remember correctly? Link to comment Share on other sites More sharing options...
Puffwagon Puff Gold Donating Members 16,012 Member For: 9y 11m 3d Gender: Male Location: South Australia Posted 02/05/17 01:00 AM Share Posted 02/05/17 01:00 AM (edited) Gen 2 is 66mm. I think the gen 1 is 62.3mm 62.5mm. Edit: Looked it up and corrected it. Edited 02/05/17 01:03 AM by Puffwagon 1 Link to comment Share on other sites More sharing options...
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