Jamesy Posted July 25, 2009 Share Posted July 25, 2009 I am bpu running 407bhp and seem to be making 14psi / 1 bar max. I always thought bpu was 1.2 bar. Does this mean my cw restrictor ring must be the 1 bar one? And also is it just a case of if i buy a 1.2 bar ring i will automatically gain more boost and then some more power?? Quote Link to comment Share on other sites More sharing options...
R Black Posted July 26, 2009 Share Posted July 26, 2009 Every car is different, yes you could put a larger RR in to get to 1.2, but you should remember 1 bar is safer than 1.2 bar & your 1 bar on a cold moist day will rise, the same would be true of a car running 1.2 in summer then rising in perfect conditins. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 26, 2009 Author Share Posted July 26, 2009 So would a 1.2 bar rr car would rise to 1.4 occassionally? Think i mite try it. Any idea how much extra bhp that .2 bar will gain ?? Quote Link to comment Share on other sites More sharing options...
trinitom Posted July 26, 2009 Share Posted July 26, 2009 (edited) mea by 20hp more depending in your engine condition! 407hp at 1 bar is very good! mine is about 1 bar, on hot days i get around 0.98 on cold 1.08 edit-- but if you don't want to risk 1.2 rr you could always use a boost controller and raise it to 1.2 bar, i think it is the safest way! Edited July 26, 2009 by trinitom (see edit history) Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 26, 2009 Author Share Posted July 26, 2009 thanx! so even with a 1 bar RR u can still run 1.2 bar with a b/controller??? yeah i think 407 is good for 1 bar - and that was before the fmic was fitted.... ....do you think that maybe the turbos are hybrids? the previous owner thought it "might" be...is there anyway to tell? Quote Link to comment Share on other sites More sharing options...
trinitom Posted July 27, 2009 Share Posted July 27, 2009 thanx! so even with a 1 bar RR u can still run 1.2 bar with a b/controller??? yeah i think 407 is good for 1 bar - and that was before the fmic was fitted.... ....do you think that maybe the turbos are hybrids? the previous owner thought it "might" be...is there anyway to tell? yes with 1bar RR you can raise boost with an EBC, about the turbos i don't know, the stock system normally produce around 400 hp at 1.2 bar assuming engine and turbos are in good condition. I think the only way to know if they are hybrids is removing them and check if they have any steel components. “someone correct me if I’m wrong”. Quote Link to comment Share on other sites More sharing options...
jacko Posted July 27, 2009 Share Posted July 27, 2009 Im collecting all the BPU parts together and i went for a 1 bar RR and will use my Profec B to tweak that up to 1.2- as previously mentioned you dont want to be overboosting on a cold night Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 27, 2009 Author Share Posted July 27, 2009 i think i might go for a 1.2 bar RR then and just take it easy in the cold! Quote Link to comment Share on other sites More sharing options...
jamesmark Posted July 27, 2009 Share Posted July 27, 2009 i think i might go for a 1.2 bar RR then and just take it easy in the cold! Or swap it back to the 1 bar RR in winter. A lot of work but look at the alternative if you do not take it easy in the winter or you do get boost spikes! New set up tubbies and the labour to get them fitted. Or as mentioned bite the bullet and get a BC fitted then you have best of both worlds and are in control as much as you can be. (still no guarantee but better than slapping a 1.2bar RR and hoping for the best ) Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 27, 2009 Author Share Posted July 27, 2009 Or swap it back to the 1 bar RR in winter. A lot of work but look at the alternative if you do not take it easy in the winter or you do get boost spikes! New set up tubbies and the labour to get them fitted. Or as mentioned bite the bullet and get a BC fitted then you have best of both worlds and are in control as much as you can be. (still no guarantee but better than slapping a 1.2bar RR and hoping for the best ) yeah good point.... any suggestions or BC on a budget? but not a pony one "if" my turbos end up being hybrids then i guess it doesnt matter if they spike a bit over 1.2 bar right?? Quote Link to comment Share on other sites More sharing options...
jamesmark Posted July 27, 2009 Share Posted July 27, 2009 yeah good point.... any suggestions or BC on a budget? but not a pony one "if" my turbos end up being hybrids then i guess it doesnt matter if they spike a bit over 1.2 bar right?? That is the word.....budget. Unless a trader has one 2nd hand. Hybrids are usually rated to 1.4 bar. The hybrids on my old UK spec were Turbo Technics they were rated to 1.4bar. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 27, 2009 Author Share Posted July 27, 2009 cheers james... just a shame i dont "know" for sure if they are hybrids otherwise i could crank it up a bit more. Quote Link to comment Share on other sites More sharing options...
jacko Posted July 27, 2009 Share Posted July 27, 2009 Look out for a second hand Greddy Profec B- can be had for a good price *Edit- although looking on ebay they appear to have gone up in price a bit? Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 27, 2009 Author Share Posted July 27, 2009 yeah was thinking along the lines of a profec B mate - usually go for around a ton mark last time i looked for one in my skyline.... Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 31, 2009 Author Share Posted July 31, 2009 That is the word.....budget. Unless a trader has one 2nd hand. Hybrids are usually rated to 1.4 bar. The hybrids on my old UK spec were Turbo Technics they were rated to 1.4bar. just bought a Blitz SBC b/controller mate so will tweak it up to 1.2 bar. I have been told that "if" i am running 407 at 1 bar and pre the fmic going in its likely i have hybrids...however im gonna fit the ebc then get it on AFR's dyno to see what power its producing. Although the only way to be 100% is to have a look inside one - a cost and hassle i wont be bothering with just yet!! 1.2 bar will do fine...for now! Quote Link to comment Share on other sites More sharing options...
jamesmark Posted July 31, 2009 Share Posted July 31, 2009 Although the only way to be 100% is to have a look inside one - a cost and hassle i wont be bothering with just yet!! 1.2 bar will do fine...for now! Yeah, magnet on the turbines. Quote Link to comment Share on other sites More sharing options...
Jamesy Posted July 31, 2009 Author Share Posted July 31, 2009 Yeah, magnet on the turbines. if only it were easy to try the ol magnet trick with the bad boys still fitted to the car and not having to remove everything eh!! Quote Link to comment Share on other sites More sharing options...
Jamesy Posted August 4, 2009 Author Share Posted August 4, 2009 got the SBC fitted last night and the car is now making 1.2 bar (well actually 1.24 at first!) thanx for all the advice guys i am well chuffed with it and it feels much faster and responsive now Quote Link to comment Share on other sites More sharing options...
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