95SupraTT Posted October 9, 2009 Share Posted October 9, 2009 What is the stock boost level of a stock tt? And when i get a boost controller,, whats the safest but most effective level to go??? Quote Link to comment Share on other sites More sharing options...
heckler Posted October 9, 2009 Share Posted October 9, 2009 What is the stock boost level of a stock tt? And when i get a boost controller,, whats the safest but most effective level to go??? stock is approx 0.8 bar, max boost with controller is 1.2 bar Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 So i have a greddy boost gauge in bars.. So can i check for a boost leak by seeing if it taps 0.8? Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 1.2bar is the highest boost level achievable on stock turbos with both cats removed and 1.2bar restrictor ring in place in the exhaust. Do you have both cats removed already bud? Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 I dont think so..i bought the car literally two weeks ago.. It has a hks super drager exhaust... But when you look under i dont see any cats... Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 I need alot of help with alot of things.. I know diddly squat about the car !!.. I ran 15.1 with it.. And i got so depressed lol... I cant launch it.. Its auto.. Fitz i believe told me to just punch it off the line.. Or brake boost.. But i tried them both without success.. So im thinking i have something wrong.. And also i looked under the car and the oil pan location looks like its leaking.. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 I dont think so..i bought the car literally two weeks ago.. It has a hks super drager exhaust... But when you look under i dont see any cats... Ok i would check between the first two sections of the exhaust if you have a 1.2bar restrictor ring fitted without this your turbos could spool up to 1.6bar and literaly blow up this ring provides sufficient back pressure to hold your boost to a safe level. I would check before using a boost controller to raise your boost levels above stock 0.8. Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Will dooo thanx man.. And i am installing one tomorrow.. You saved me a couple of grand Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Ohh what does this 1.2 bar ring look like??? Quote Link to comment Share on other sites More sharing options...
Nic Posted October 9, 2009 Share Posted October 9, 2009 is yours a US spec Supra? Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Yeah it is... Im from new york.. Just moved to dallas.. Supra is us spec.. Automatic tt.. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 (edited) Will dooo thanx man.. And i am installing one tomorrow.. You saved me a couple of grand You may want to check if the car has an after market fuel pump too walbero is a decent make. More boost equals more fuel needed mate use the search button on here and do a search for bpu it has a list of all your necessary modifications needed for running 1.2bar safely. Wabero fuel pump colder grade spark plugs double de-cat pipes restrictor ring 1.2bar in size a good induction kit (not hks there crap) boost controller some supras will run higher boost on their own without this but some need a little help. boost gauge & air/fuel gauge. fcd (fuel cut defender) I may have missed something so check out bpu using the search button theres a guide there to help. All the best. Nic will know better than me hes a world of knowledge mate. Edited October 9, 2009 by tony tt (see edit history) Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 So far the car has a hks super drager..im pretty sure no cats.. Hks bov.. It has a greddy boost, exh temp and oil pres gauge.. So maybe itll be running a bit higher than 0.8? So all i will need is a boost controller (with 1.2 restrictor) plus.. Walbro fuel pump and a intake?.. And thats it.. Thatll be bpu level??? Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Tomorrow i will have somebody check for the 1.2 bar ring.. Because im getting a boost controller.. And next week i want to install a fmic with piping... Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 is yours a US spec Supra? are u.s supras different to the j spec? If they are i wasnt aware of that. Quote Link to comment Share on other sites More sharing options...
pistonbroke Posted October 9, 2009 Share Posted October 9, 2009 You say you've looked underneath and not seen any cats. The first cat is right below the turbos so you'll not really see it from underneath. Double check the first cat is not still fitted. Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Well i just read that great article you gave me for bpu.. And according to that guide i wont have to worry about the restrictor ring.. And it said j-spec turbos cant withstand boost as good as us/uk .. It said 1.4 is possible,, but its pushing it.. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 So far the car has a hks super drager..im pretty sure no cats.. Hks bov.. It has a greddy boost, exh temp and oil pres gauge.. So maybe itll be running a bit higher than 0.8? So all i will need is a boost controller (with 1.2 restrictor) plus.. Walbro fuel pump and a intake?.. And thats it.. Thatll be bpu level??? Click on the bpu part mate it should be here in blue it will take you to a thread that will provide all you need to do for raising your boost to 1.2bar mate. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 Well i just read that great article you gave me for bpu.. And according to that guide i wont have to worry about the restrictor ring.. And it said j-spec turbos cant withstand boost as good as us/uk .. It said 1.4 is possible,, but its pushing it.. 1.4bar is possible on uk turbos not j spec mate its not recommended to push them to 1.4! Im not sure what the difference is on a u.s spec supra mate i hope someone can clarify that first. Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 If the first cat is there.. How would i go about getting it removed.. And will i pass emissions inspection?.. And if i leave it,, can i not go bpu?.. Nice vids .. Heres my supra doing horrible .. I race first.. And then a couple races again.. Couldnt launch for shit.. Ran 15.1 both runs.. Quote Link to comment Share on other sites More sharing options...
Nic Posted October 9, 2009 Share Posted October 9, 2009 (edited) Ok forget about the restrictor ring in that case, they are only needed on JDM Supras. The US Supra has different turbos to the JDM so raising the boost is a little different. Does the car still have the 2 catalytic convertors fitted? If you're not sure have a look under the car, pic below shows the first small cat. and the second longer cat. The 1st cat. is located closest to the engine, the 2nd cat runs under the front section of the car. The cats, especially the 1st one, are very restrictive, upping the boost with the cats in place will generate high exhaust temperature that could potentially be damaging to the engine. A common modification is to replace 1 or both of the cats with a straight through pipe, known as a 'de-cat' pipe(s). You can either replace each cat with a separate decat pipe or replace both with one decat pipe. Note you will need decat pipes specifically for the US Supra, the JDM ones are a different fit. The stock boost is around 0.8bar/11.6psi, to raise this you will need a boost controller (either mechanical or electronic). A generally accepted safe boost pressure to raise to is around 1.2bar/17.5psi. The stock ECU (engine control unit) has a safety feature that will cut fuel to the engine if it sees over 1bar/14.5psi, to get around this you will need to fit a FCD (Fuel Cut Defencer) this is wired into the ECU to fool it so it doesn't cut the fuel. You will also need a set of cooler grade plugs and some way of monitoring boost levels, this can either be with an electronic boost controller or a boost gauge. Have a read of this thread it explains in more detail. http://mkivsupra.net/vbb/showthread.php?t=94705 Anyway have a check on whether it still has the cats fitted and we can take it from there. Edited October 9, 2009 by Nic (see edit history) Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 http://www.youtube.com/watch?v=GiA5kQSZLco Quote Link to comment Share on other sites More sharing options...
Nic Posted October 9, 2009 Share Posted October 9, 2009 are u.s supras different to the j spec? If they are i wasnt aware of that. Yes different turbos, bigger injectors and higher flowing fuel pump are the main differences. Quote Link to comment Share on other sites More sharing options...
95SupraTT Posted October 9, 2009 Author Share Posted October 9, 2009 Nic.. I believe that is not in my car.. So i guess its decatted.. Lolol.. Quote Link to comment Share on other sites More sharing options...
tony tt Posted October 9, 2009 Share Posted October 9, 2009 Yes different turbos, bigger injectors and higher flowing fuel pump are the main differences. I see i didnt know that nic thanks. Quote Link to comment Share on other sites More sharing options...
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