Guest Geneb Posted April 8, 2007 Share Posted April 8, 2007 Thankyou very much bud it makes sense now:) Quote Link to comment Share on other sites More sharing options...
Guest 95tt Posted July 6, 2007 Share Posted July 6, 2007 Im bpu++. And I was wondering, My fuel pump is from 1995 so its getting old. but why replace something that works. Woud I see difference in my AFR readings when the pump starts to go bad ? or do i need to hook up a pressure gauge. My logic tells me that if my pump is starting to go bad i would read a leaning afr ? right or wrong ? Quote Link to comment Share on other sites More sharing options...
tDR Posted July 6, 2007 Share Posted July 6, 2007 Correct, you will see a lean AFR if your pump is dying but that one time on boost could be too late! Best replacing as a service item, most economical performance pump is the walbro 341 255 ltr/hr Cheers, Brian. Quote Link to comment Share on other sites More sharing options...
supra61 Posted July 6, 2007 Share Posted July 6, 2007 thanks homer it all makes more sence now.i'm just going bpu+ nice piece,many thanks. Quote Link to comment Share on other sites More sharing options...
Guest Geneb Posted July 6, 2007 Share Posted July 6, 2007 thanks homer it all makes more sence now.i'm just going bpu+ nice piece,many thanks. Will you shut up about your "BPU+" you old Tart:p im going "BPU+1" with shiny brass knobs on! Quote Link to comment Share on other sites More sharing options...
supra_surj Posted July 7, 2007 Share Posted July 7, 2007 A quick question about the decats for bpu....if i have a 3" cat back exhaust do i need to get a 3" decat or would a 2.5" fit ok? Quote Link to comment Share on other sites More sharing options...
Mas Posted July 7, 2007 Share Posted July 7, 2007 you would be ok with 2.5inch one Surj, although you usually need an adaptor, most of the members have such set up anyway Quote Link to comment Share on other sites More sharing options...
tDR Posted July 7, 2007 Share Posted July 7, 2007 Nah no adapter necessary - the flanges mate up fine 2.5" decats to 3" cat back system. I have 2.5" decats into my Blitz Nur Spec R. I'd always recommend 2.5" decats for J Spec owners on standard turbos - keeps a bit more backpressure meaning you don't need such a small diameter restrictor ring. Cheers, Brian. Quote Link to comment Share on other sites More sharing options...
supra_surj Posted July 7, 2007 Share Posted July 7, 2007 Thanks guys! Quote Link to comment Share on other sites More sharing options...
Mas Posted July 7, 2007 Share Posted July 7, 2007 Nah no adapter necessary - the flanges mate up fine 2.5" decats to 3" cat back system. I have 2.5" decats into my Blitz Nur Spec R. I'd always recommend 2.5" decats for J Spec owners on standard turbos - keeps a bit more backpressure meaning you don't need such a small diameter restrictor ring. Cheers, Brian. I used an adaptor maybe cos I have a 4" cat back!!! Quote Link to comment Share on other sites More sharing options...
tDR Posted July 7, 2007 Share Posted July 7, 2007 I used an adaptor maybe cos I have a 4" cat back!!! That'd do it! Quote Link to comment Share on other sites More sharing options...
Mas Posted July 7, 2007 Share Posted July 7, 2007 That'd do it! I'm sure I have 2.5" decats and Mark used an adaptor to fit them to my decat! I know its a different case but though same thing happeneds with 3" systems too! Quote Link to comment Share on other sites More sharing options...
Dash Rendar Posted September 29, 2007 Share Posted September 29, 2007 Like everyone has already said... This is a great article. I'm trying to find a thread that describes the difference between the various BPU+ levels (since a couple of people have already mentioned it in this thread). I'm sure I stumbled across one once, but I can't find it now. Quote Link to comment Share on other sites More sharing options...
Steve Posted September 29, 2007 Share Posted September 29, 2007 Theres a bit over on mkiv.com that has the differences between bpu+ and bpu++ Quote Link to comment Share on other sites More sharing options...
Homer Posted September 30, 2007 Author Share Posted September 30, 2007 In addition to Steve's post, the difference in the + and ++ terms of the orignal "BPU" packages marketed is explained here: http://www.suprastore.com/450hppackage.html I seriously doubt their claims of performance differences between BPU and BPU++. The HP claims are also not comparable, whether it be due to the US Spec difference or 'eager' dyno's, who knows... Quote Link to comment Share on other sites More sharing options...
Dash Rendar Posted September 30, 2007 Share Posted September 30, 2007 I see what you mean... How many BPU Supras out there have 430RWHP? Seems a bit optimistic to me! Quote Link to comment Share on other sites More sharing options...
amigo5 Posted October 26, 2007 Share Posted October 26, 2007 i have one question regarding the exhaust shall i fit the downpipe with the width of 3" and length of only 1 m and no more from the turbos till under the seat and the rest of the exhaust should be 2" after the down pipe Quote Link to comment Share on other sites More sharing options...
amigo5 Posted October 27, 2007 Share Posted October 27, 2007 ?? Quote Link to comment Share on other sites More sharing options...
carl0s Posted October 27, 2007 Share Posted October 27, 2007 i have one question regarding the exhaust shall i fit the downpipe with the width of 3" and length of only 1 m and no more from the turbos till under the seat and the 4rest of the exhaust should be 2" after the down p41ipe Most people fit 3" decat and 3" exhaust, or all 2.5". Quote Link to comment Share on other sites More sharing options...
Guest aussie_supra Posted January 13, 2008 Share Posted January 13, 2008 If I do a full BPU as said here and just remove one CAT will I still get around 400HP? Quote Link to comment Share on other sites More sharing options...
Guest aussie_supra Posted January 13, 2008 Share Posted January 13, 2008 And if I do remove both CATs how can I pass MOT? Quote Link to comment Share on other sites More sharing options...
AndyT Posted January 13, 2008 Share Posted January 13, 2008 Friendly MOT man or put one back. About 15 minutes work. Quote Link to comment Share on other sites More sharing options...
miko_supra Posted January 13, 2008 Share Posted January 13, 2008 If I do a full BPU as said here and just remove one CAT will I still get around 400HP? no both need removing. too restrictive otherwise. i think you can install a high flow performance cat if you wish Quote Link to comment Share on other sites More sharing options...
Guest aussie_supra Posted January 13, 2008 Share Posted January 13, 2008 If I install high flow performance cat will I pass MOT and get desired rwhp? or bhp Quote Link to comment Share on other sites More sharing options...
Guest aussie_supra Posted January 13, 2008 Share Posted January 13, 2008 And how did u guys pass MOT after decat? Quote Link to comment Share on other sites More sharing options...
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