watda Member 40 Member For: 16y 7m 28d Posted 03/10/08 01:08 PM Share Posted 03/10/08 01:08 PM I'm trying to put together a package of modifications for my BF MKII XR6T that will provide an "easy" 350kw atw and potentially the ability to push the 400 mark.At this stage, the modifications being considered are:Flash box/tuneStage 2 intercooler from PW, Plazmaman or the like, including under battery air intakeSeimens injectors (62 lbs I believe)X force exhaust - 4 inch dump, 3.5 inch cat with twin 2.5inch systemBosch 044 Fuel pump12psi actuator and wastegate 'Flapper" mod.These seem to be the standard upgrades when looking for the 330-350kw atw mark. However what can be done to push this into the higher 300's/low 400's? For example, is an upgrade intake plenum going to help me or is there something else out there?? And is this power possible on 15psi, or is this the power level where internal engine modifications become a necessity?Most importantly the car must:- Produce excellent torque (eg 4th of 5th gear pull at 60km/h should be effortless)- Produce consistent power.Thanks in advance. Link to comment Share on other sites More sharing options...
DjGsTa Donating Members 944 Member For: 17y 8m 13d Gender: Male Posted 03/10/08 01:12 PM Share Posted 03/10/08 01:12 PM Bigger intake manifold would be a good option, get something better then an under battery intake, something like Rapids 4 inch intake. With those mods you've posted + a better intake manifold and a good CAI I dont see why you cant make close to the 400rwkw mark?Although I could be wrong. Link to comment Share on other sites More sharing options...
rhys86 Donating Members 443 Member For: 17y 11m 25d Gender: Male Location: Wollongong Posted 03/10/08 01:31 PM Share Posted 03/10/08 01:31 PM The under battery intake has a limit of about 350rwkw although a few people have gone above with this. It would be better if you used a 4inch intake of one of the advertisers. The only other mod that I would add to the ones that you have already listed is a plenum of some sort. Than you should safely see 400rwkw easily. Link to comment Share on other sites More sharing options...
Buf-Phoon loitering with intent Lifetime Members 13,318 Member For: 21y 4m 6d Gender: Male Location: Zombie Birdhouse Posted 03/10/08 01:35 PM Share Posted 03/10/08 01:35 PM I'd also suggest a surge tank in conjunction with the 044 pump to provide an added margin of safety, providing the intank pump is up to the task in keeping the juice up to the surge tank. Process West have a nice surge tank set up Link to comment Share on other sites More sharing options...
typhoon_freak Cryptic Clothing Company Donating Members 4,556 Member For: 16y 5m 15d Gender: Male Location: Brisvages, Capalaba Posted 03/10/08 07:56 PM Share Posted 03/10/08 07:56 PM im not sure what stage, but you have to start looking at some internal work to keep up with the upgrades. Link to comment Share on other sites More sharing options...
watda Member 40 Member For: 16y 7m 28d Posted 04/10/08 04:51 PM Author Share Posted 04/10/08 04:51 PM The 4 inch intake sounds like a good idea. Is there anyway to retain the factory battery position and have the larger intake? Link to comment Share on other sites More sharing options...
Tree Monkey Member 685 Member For: 17y 16d Gender: Male Location: brisvagas / Manly Posted 04/10/08 11:16 PM Share Posted 04/10/08 11:16 PM (edited) Not realy. I have a 3" ub intake, hot side piping, cooler, coldside piping (all RAPID gear) 60lb injectors, in tank pump, 4"dump and cat in to twin 2.5" redback runing 15lb makes 350 rwkw with flash tune and profec b boost controler. The next mods needed are flapper mod and plenum. Not to make more HP but to make the same at lower boost (13lb) and more control over the boost but can wind it up if needed. I have used the 3" intake to restrict to amount of power I can make as it is a ba bottem end but if I had the bf2 or poon one I would have gorn for a 4" intake. Edited 04/10/08 11:16 PM by Tree Monkey Link to comment Share on other sites More sharing options...
MRDOSE Member 1,195 Member For: 16y 11m 26d Gender: Male Location: Sydney Posted 04/10/08 11:24 PM Share Posted 04/10/08 11:24 PM The 4 inch intake sounds like a good idea. Is there anyway to retain the factory battery position and have the larger intake?plazmaman do a 3inch with the battery hidden inside the airbox simmilar to this but I think this one is for the battery relocated bellow the airbox.http://cgi.ebay.com.au/XR6-Turbo-Cold-Air-...1QQcmdZViewItem Link to comment Share on other sites More sharing options...
watda Member 40 Member For: 16y 7m 28d Posted 05/10/08 02:02 AM Author Share Posted 05/10/08 02:02 AM What exactly is involved in the "flapper" mod and is this a costly change to make to the wastegate?The 3 inch airbox + hidden battery sounds ideal given the short pipe length directly into the turbo. The 4 inch intake would be great though.After upgrading the plenum and intake, does this take the engine to its limits before much bigger boost and stronger internals are necessary? Link to comment Share on other sites More sharing options...
BFHOON Donating Members 1,932 Member For: 18y 9m 1d Gender: Male Location: nsw Posted 05/10/08 03:14 AM Share Posted 05/10/08 03:14 AM (edited) look at a full plazmaman 800 hp kitadd a set of siemens injectors big cat centre muffler removed, fuel pump and surge tank, 350 easy, I would not go past 350 on a stock bottom end.then you can get a waste gate port job actuator and a big custom zorst for more power later. Edited 05/10/08 03:16 AM by BFHOON Link to comment Share on other sites More sharing options...
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