Duncan Posted February 17, 2014 Share Posted February 17, 2014 BTW I just wanted to clarify something from earlier in the thread. Choices made during tuning won't give you more responsive motor, or at least there is no compromise to be made between power and response in tuning. The tuner is either making all available power at a given load cell or they are not, the only option is less timing or more fuel which are safety margins - they won't increase response. Any gain in the response is in the mechanical setup, not the tune. Smaller turbo Lighter turbo rotating mass More capacity Shorter intake Smaller Cams Cam timing Smaller, shorter exhaust manifold Free flowing exhaust Smaller intercooler Holding wastegate fully shut until it opens 3 Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202523 Share on other sites More sharing options...
XKLABA Posted February 17, 2014 Share Posted February 17, 2014 BTW I just wanted to clarify something from earlier in the thread. Choices made during tuning won't give you more responsive motor, or at least there is no compromise to be made between power and response in tuning. The tuner is either making all available power at a given load cell or they are not, the only option is less timing or more fuel which are safety margins - they won't increase response. Any gain in the response is in the mechanical setup, not the tune. Smaller turbo Lighter turbo rotating mass More capacity Shorter intake Smaller Cams Cam timing Smaller, shorter exhaust manifold Free flowing exhaust Smaller intercooler Holding wastegate fully shut until it needs to open exactly !!! Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202542 Share on other sites More sharing options...
Wongy Posted February 17, 2014 Share Posted February 17, 2014 it's more the way the cams are set, making better use of the air it gets meaning the turbos don't have to working as had a good quality boost controller doesn't hurt either what mods have you got done ?, cause yeah that's not great at all, what boost is that ? cam gears ? if not get some It has a bosch fuel pump, -5's, came with the car, so i got tomei cam gears, Tomei poncams(gotta confirm which one i'm receiving), Valve springs, ARP head studs and on the hunt for decent priced nismo AFM, then hopefully a good tune at JEM. Hopefully looks better than the last tune. Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202553 Share on other sites More sharing options...
Wongy Posted February 17, 2014 Share Posted February 17, 2014 And a Greddy boost controller too,but last tune the guy didn't do anything to boost controller Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202665 Share on other sites More sharing options...
XKLABA Posted February 17, 2014 Share Posted February 17, 2014 What boost are you running, from your graph it looks like your on the wastegate and its creeping like hell Their is deffenintly something not right in your setup Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202745 Share on other sites More sharing options...
Wongy Posted February 17, 2014 Share Posted February 17, 2014 I got told I was running 18psi cuz he didn't want to go any further incase he blows a head gasket. Not knowing much I just said ok o_0any ideas what might be wrong? Sorry,I have no clue haha Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202824 Share on other sites More sharing options...
XKLABA Posted February 17, 2014 Share Posted February 17, 2014 What exhaust have you got ? If you are after response you want stock cams or type R 250 Poncams and have them dialed in for response, I have settings for most cams, anything bigger in the poncam range will lose you response -5s on 18psi should be making a lot more then that even on a stock motor providing it can breath Save your money on the Nismo AFMs and put it towards a good computer that uses map Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202836 Share on other sites More sharing options...
Wongy Posted February 17, 2014 Share Posted February 17, 2014 HKS hi power silent, i want the amuse r1 thats for sale but old man doesn't like a loud car =[, its got a pfc, and it has stock cams in it at the moment. Previous owner had cams listed on ad as well, but wasn't informed what cams i was running, so could it be possible that i might have cams not suited for response or not dialed in for response? but either way, when i get new cams put in, i'll see what my old cams were, see if they were stock or aftermarket. Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7202886 Share on other sites More sharing options...
JimmyRickard Posted February 18, 2014 Share Posted February 18, 2014 Thanks for the post Duncan. As for as your list goes, there's a couple of things here I am curious about: Smaller turbo - I'm assuming -7's are the 'smallest' turbo one can buy, since ceramics go pop at the race track. Lighter turbo rotating mass - as above More capacity - It's going to have to make do for now Smaller Cams - smaller than factory? Free flowing exhaust - I have sidepipes, not sure about the manifold though Smaller intercooler - I'm assuming there's no use in going smaller than factory? Holding wastegate fully shut until it opens - I'm still using standard wastegate. Is there any reason to switch to something else? Cheers Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203070 Share on other sites More sharing options...
XKLABA Posted February 18, 2014 Share Posted February 18, 2014 HKS hi power silent, i want the amuse r1 thats for sale but old man doesn't like a loud car =[, its got a pfc, and it has stock cams in it at the moment. Previous owner had cams listed on ad as well, but wasn't informed what cams i was running, so could it be possible that i might have cams not suited for response or not dialed in for response? but either way, when i get new cams put in, i'll see what my old cams were, see if they were stock or aftermarket. What front pipe and cat have you got ? Can you contact the old owner and see if you can find out what cams are in it, I know if I got some cams in then payed a workshop to change and found out I put in exactly what I pulled out I'd be pissed, and that is a clean and clear waste of money Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203200 Share on other sites More sharing options...
Super Drager Posted February 18, 2014 Share Posted February 18, 2014 BTW I just wanted to clarify something from earlier in the thread. Choices made during tuning won't give you more responsive motor, or at least there is no compromise to be made between power and response in tuning. The tuner is either making all available power at a given load cell or they are not, the only option is less timing or more fuel which are safety margins - they won't increase response. Any gain in the response is in the mechanical setup, not the tune. Smaller turbo Lighter turbo rotating mass More capacity Shorter intake Smaller Cams Cam timing Smaller, shorter exhaust manifold Free flowing exhaust Smaller intercooler Holding wastegate fully shut until it opens This....i hate hearing "i tuned it for response bro, not top end".... makes me want to slap people. Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203308 Share on other sites More sharing options...
Wongy Posted February 18, 2014 Share Posted February 18, 2014 What front pipe and cat have you got ? Can you contact the old owner and see if you can find out what cams are in it, I know if I got some cams in then payed a workshop to change and found out I put in exactly what I pulled out I'd be pissed, and that is a clean and clear waste of money The funny thing is the owner i bought it off bought it off another guy who said he had done it all at Croydon race dev, so the owner i bought it off has no clue lol, so what im thinking is when i come to installing my new parts, and the old parts come out, i'm going to make a record of what comes out =\ as for the front pipe, i have to double check what is there, i don't remember what it was when it was inspected by mechanic before i bought the car xD not a very good memory =[ Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203354 Share on other sites More sharing options...
XKLABA Posted February 18, 2014 Share Posted February 18, 2014 This....i hate hearing "i tuned it for response bro, not top end".... makes me want to slap people. Haha yeah right, I say my car was tuned for response and what I mean by it is I have chosen all the parts on my car for response and dialed in the cams to give better low which helps the responsiveness of the turbos, which is a form of tuning Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203357 Share on other sites More sharing options...
Piggaz Posted February 18, 2014 Share Posted February 18, 2014 This....i hate hearing "i tuned it for response bro, not top end".... makes me want to slap people.So saying you have turned the cams in a way which promotes more low end twist at the sacrifice of top end power (say it rolls over at 7500 instead of 8500-8800) means nothing? Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203365 Share on other sites More sharing options...
Hadouken Posted February 18, 2014 Share Posted February 18, 2014 If you are so response driven. then why not just get a small single that pits out 300kw Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203377 Share on other sites More sharing options...
XKLABA Posted February 18, 2014 Share Posted February 18, 2014 The funny thing is the owner i bought it off bought it off another guy who said he had done it all at Croydon race dev, so the owner i bought it off has no clue lol, so what im thinking is when i come to installing my new parts, and the old parts come out, i'm going to make a record of what comes out =\ as for the front pipe, i have to double check what is there, i don't remember what it was when it was inspected by mechanic before i bought the car xD not a very good memory =[ That does make helping harder, where are you located What you might have to do is rip off one of the cam covers and get the part number off the end of the cam cause if their not poncams but full aftermarket then poncams may not be "boltin" any more in which case you may as well go the 260 x 10.8 procam or better yet the unigroup cams Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203378 Share on other sites More sharing options...
zebra Posted February 18, 2014 Share Posted February 18, 2014 If you are so response driven. then why not just get a small single that pits out 200kw fyp Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203380 Share on other sites More sharing options...
Super Drager Posted February 18, 2014 Share Posted February 18, 2014 So saying you have turned the cams in a way which promotes more low end twist at the sacrifice of top end power (say it rolls over at 7500 instead of 8500-8800) means nothing? No no no, not talking about anything mechanical. People go in with a car that has boltons and say the ECU was tuned for response....no camgears, cams, etc. Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203383 Share on other sites More sharing options...
Piggaz Posted February 18, 2014 Share Posted February 18, 2014 No no no, not talking about anything mechanical. People go in with a car that has boltons and say the ECU was tuned for response....no camgears, cams, etc.Ah. Fair enough then . Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203395 Share on other sites More sharing options...
Hadouken Posted February 18, 2014 Share Posted February 18, 2014 fyp Lol. Was meant to say 300hp. I don't see what all the fuss is. Its proven that 7's with cam gears 20 pound of the boost is responsive and puts out a nice linear power delivery Or if you don't car about power and just super response then you should have bought something else. Link to comment https://www.sau.com.au/forums/topic/219857-building-an-rb26-for-response/page/6/#findComment-7203419 Share on other sites More sharing options...
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