Guest 93mk4_2jz Posted January 17, 2012 Share Posted January 17, 2012 hello everyone, im wondering if a greddy boost cut controller (bcc) for a jza70 (1j) would work for my 2j jza80? im sure the anwser is no but im just wanting to make sure. and if it wont work does anyone have any ideas were i could find one due to them being discontinued? thanks for any ideas!! Quote Link to comment Share on other sites More sharing options...
SupraAyf Posted January 18, 2012 Share Posted January 18, 2012 It should do but you will need to use the dial on the BCC to help adjust the signal intercept voltage of the BCC to the designated level for the JZA70. As an example but the signal intercept voltage is 4.1v and 4.3v on a JZA80. In this case, the voltage variations depends on whether it's a pre-facelift or a facelift variant. You will require a steady power source, a good connection between the wires, the actual voltage figure for the JZA70 and a reliable voltmeter in order to fine tune the output reading. As a warning but please ensure that your BCC is grounded correctly or else it can work fairly erratically indeed. Quote Link to comment Share on other sites More sharing options...
Guest 93mk4_2jz Posted January 19, 2012 Share Posted January 19, 2012 Ok thanks alot, and would you just recommend trying to hunt the proper one down for my jza80? And I'm installing this because I'm about to bpu my Jdm supra and they don't recommend running more then 15psi and the stock turbos so I'm thinking I'm only gunna run 13psi to be safe, so would I still need a boost cut/fuel? Because the factory ecu cuts at like 14.**psi? Quote Link to comment Share on other sites More sharing options...
SupraAyf Posted January 19, 2012 Share Posted January 19, 2012 Ok thanks alot, and would you just recommend trying to hunt the proper one down for my jza80? And I'm installing this because I'm about to bpu my Jdm supra and they don't recommend running more then 15psi and the stock turbos so I'm thinking I'm only gunna run 13psi to be safe, so would I still need a boost cut/fuel? Because the factory ecu cuts at like 14.**psi? It's probably easier to buy a designated BCC if you're not sure. It's also not something you want to get wrong! The standard pressure is 0.7bar on a TT but the fuel-cut kicks in at 1.0bar. Ideally speaking, once you've added your BCC, you should set your boost controller to a maximum of 1.2bar. Also, make sure to fit a restrictor ring in the exhaust or else your turbo will spool until it pops. Quote Link to comment Share on other sites More sharing options...
Guest 93mk4_2jz Posted January 20, 2012 Share Posted January 20, 2012 Yea I think I'll just search for the correct bcc, and I've done a ton of research on bpuing and restrictor rings and I've came up empty on a size of hole to start with for the restrictor ring. Because its just a flat plate with a hole in it placed between the downpipe and midpipe correct? And will I have to be conserned with humidity and temperature drop? (I live in canada) summer nights get chilly. And as bpu goes this is what I have so far: autobahn88 downpipe, custom midpipe to run Hks super dragger exuast, Hks type 1 turbo timer, Hks evc gen 6, greddy bcc, and apexi intake. And one day a greddy front mount, and blitz bov. Is there anything else I will need? Quote Link to comment Share on other sites More sharing options...
SupraAyf Posted January 20, 2012 Share Posted January 20, 2012 Is there anything else I will need? A quick engine health check, Walbro fuel pump upgrade and a check of your SMIC. If the SMIC is damaged in anyway or is past its sell-by date then replace it. The fuel pump, if original, could do with a change anyway if it has been on the car for umpteen years so an upgraded high-flow Walbro will do the job. Here's some bedtime reading for you: http://mkivsupra.net/vbb/showthread.php?97235-Boost-FCD-advice-with-JSpec&highlight=restrictor+ring http://mkivsupra.net/vbb/showthread.php?101216-Decat-problems-can-anyone-help&highlight=restrictor+ring http://mkivsupra.net/vbb/showthread.php?95437-1-1-bar-restritor-ring&highlight=restrictor+ring Quote Link to comment Share on other sites More sharing options...
Guest 93mk4_2jz Posted January 28, 2012 Share Posted January 28, 2012 thanks alot for all the advice Quote Link to comment Share on other sites More sharing options...
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