Farlane92 Posted April 21, 2015 Share Posted April 21, 2015 Hi folks, was looking into gradually working my supra to bpu. Unfortunately can't afford to buy a kit in a oner so will be doing it a piece at a time. My question is will 3 inch 1st and 2nd decats fit fine with the TRD exhaust? As pictured below the first section cat back appears to be the standard 2.5 inch pipework then the rear back box section looks the widen to 3 inch. Also are the TRD cat back system quite rare? Haven't seen them for sale before. Quote Link to comment Share on other sites More sharing options...
mattdavies Posted April 21, 2015 Share Posted April 21, 2015 The Answer is yes they should be fine. For reference, if you fit a Second Cat and leave the First cat in you will be running just shy of 1 bar of boost, on a cold night you will hit fuel cut though. Do you have an order of going BPU ? what are you going with first as you can fit it in stages Quote Link to comment Share on other sites More sharing options...
Farlane92 Posted April 21, 2015 Author Share Posted April 21, 2015 Didn't have a particular order in mind but thought of a FMIC or decats first but what would you recommend being best? Have a set of ngk iridium bkr6eix-11 on order for running stock at the moment but will look at just bkr6eix once I'm nearer bpu in reference to the guide on here Quote Link to comment Share on other sites More sharing options...
mattdavies Posted April 21, 2015 Share Posted April 21, 2015 Logically to keep everything safe I would go Fuel Pump Boost Gauge ( even if its a temp cheapy ) Second Decat ( As long as you fit a FCD before the colder nights ) FCD Plugs First with RR Then a boost controller if you want more boost. A FMIC may not be needed initially and it is a big outlay, if your current SMIC and piping is in reasonable condition then I would leave the FMIC or Up-rated SMIC to last. Quote Link to comment Share on other sites More sharing options...
Farlane92 Posted April 21, 2015 Author Share Posted April 21, 2015 Ok thanks mate. The car has came from Japan with a set of three defi gauges already(boost, oil pressure and oil temperature) The side mount and pipework is in really good nick so will hold off on that for the time being and get the other essentials together. Any recommendations on fuel pumps? Walbro seem the popular choice Quote Link to comment Share on other sites More sharing options...
Nic Posted April 21, 2015 Share Posted April 21, 2015 My question is will 3 inch 1st and 2nd decats fit fine with the TRD exhaust? As pictured below the first section cat back appears to be the standard 2.5 inch pipework then the rear back box section looks the widen to 3 inch. The exhaust and decat flanges are the same whether the piping is 2.5" or 3" so no problem fitting 3" decats to a 2.5" exhaust. Quote Link to comment Share on other sites More sharing options...
Nic Posted April 21, 2015 Share Posted April 21, 2015 Any recommendations on fuel pumps? Walbro seem the popular choice On a J-spec TT the GSS342 Walbro fuel pump is a straight swap. Quote Link to comment Share on other sites More sharing options...
Farlane92 Posted April 21, 2015 Author Share Posted April 21, 2015 The exhaust and decat flanges are the same whether the piping is 2.5" or 3" so no problem fitting 3" decats to a 2.5" exhaust. Would this be the same for a 4 inch system also? Sometime in the future may look at swapping out the TRD cat back if more horse is required Quote Link to comment Share on other sites More sharing options...
Nic Posted April 21, 2015 Share Posted April 21, 2015 Would this be the same for a 4 inch system also? Sometime in the future may look at swapping out the TRD cat back if more horse is required It depends on the exhaust, some 4" systems use V-band flanges, in which case you'd either need an adapter between the standard 2 bolt flange and v-band flange or weld a v-band flange onto the decat pipe. Quote Link to comment Share on other sites More sharing options...
mattdavies Posted April 21, 2015 Share Posted April 21, 2015 Would this be the same for a 4 inch system also? Sometime in the future may look at swapping out the TRD cat back if more horse is required Generally 4" are V-Band, there for you would need an adapter. Quote Link to comment Share on other sites More sharing options...
Farlane92 Posted April 21, 2015 Author Share Posted April 21, 2015 Generally 4" are V-Band, there for you would need an adapter. It depends on the exhaust, some 4" systems use V-band flanges. 4 inch is a little down the line but a definite possibility. Thanks for the info guys [emoji1] [emoji106] Quote Link to comment Share on other sites More sharing options...
MattP Posted April 21, 2015 Share Posted April 21, 2015 This Device will stop you hitting Fuel Cut it is a BPU requirement... Cheap Cheap and its brand new. http://www.mkivsupra.net/vbb/showthread.php?321542-Brand-New-Unused-Genuine-HKS-FCD-with-Reciept-From-Sumo-Power-(HKS-UK) Quote Link to comment Share on other sites More sharing options...
Justin Bieber Posted April 21, 2015 Share Posted April 21, 2015 If you ever fancy selling that trd exhaust let me know! Quote Link to comment Share on other sites More sharing options...
Farlane92 Posted April 22, 2015 Author Share Posted April 22, 2015 If you ever fancy selling that trd exhaust let me know! Haha be keeping a hold of it for the time being mate Quote Link to comment Share on other sites More sharing options...
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