jevansio Posted April 18, 2009 Share Posted April 18, 2009 Not that I thought something was wrong before, but since I got that exhaust valve thing in and the quiet backbox my car would never hold boost to the redline. I just put up with it, had a little play in the boost my myself & gave the wastegate extra duty at high RPM which helped a little. Any yesterday I got the vavlve removed & the original HKS Ti box put back on. Straight away it was overboosting so I took it easy until I could have another look at the map. Today I dropped 10% off the entire duty map, brilliant, it wasn't overboosting, but it was still a bit high, dropped another 10% off and got this run, it holds 22 PSI spot on in 5th, need to do some more tweaking but I think I can have it running 1.6 BAR perfectly to 7k Here's the graph, gears are 3rd, 4th & 5th, graphs are RPM, Boost, Duty Quote Link to comment Share on other sites More sharing options...
Kev.O Posted April 18, 2009 Share Posted April 18, 2009 Great News Jay Quote Link to comment Share on other sites More sharing options...
JamieP Posted April 18, 2009 Share Posted April 18, 2009 Nice, 1.6bar in 5th must be fun:cool: im still only at 1.3bar in the last 3 gears but hoping Ryan is going to sort that for me tomorrow. Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 21, 2009 Author Share Posted April 21, 2009 Cheers guys, it always felt a little lacking in the upper rev range, now it pulls like something not normal all the way It is pretty mental Jamie, it doesn't take long to get to the top of 5th, God help your passengers at 1.6 BAR Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 21, 2009 Share Posted April 21, 2009 Cheers guys, it always felt a little lacking in the upper rev range, now it pulls like something not normal all the way Right missus, I want a go in a couple of weeks when I'm over again Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 21, 2009 Author Share Posted April 21, 2009 Sure thing bud Quote Link to comment Share on other sites More sharing options...
supra_aero Posted April 21, 2009 Share Posted April 21, 2009 Sure thing bud That car must be mental - my old rx7 only did 0.8 bar and it felt like a rocket. Mind you they are lighter. Quote Link to comment Share on other sites More sharing options...
johnny g Posted April 21, 2009 Share Posted April 21, 2009 A couple of hundred kilo's lighter... What turbo was on it? Quote Link to comment Share on other sites More sharing options...
supra_aero Posted April 21, 2009 Share Posted April 21, 2009 A couple of hundred kilo's lighter... What turbo was on it? Stock twins with power fc & commander. Had been decatted etc. Quote Link to comment Share on other sites More sharing options...
Mike B Posted April 21, 2009 Share Posted April 21, 2009 how are the afr's? - couldn't see them on the chart and do you use a 3" box? Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 21, 2009 Author Share Posted April 21, 2009 They're low 11's Mike, I think Ryan likes to air on the side of caution (which is fine by me ) 3" DP/MP with 4" full exhaust, I've got a 4" DP/MP combo to go on though Quote Link to comment Share on other sites More sharing options...
Mike B Posted April 21, 2009 Share Posted April 21, 2009 3" DP/MP with 4" full exhaust, I've got a 4" DP/MP combo to go on though I'm having trouble living with a 4" system. Peak noise is not too bad but the motorway drone is too much. Was thinking of ways to silence it, but there is no room in the front half of the exhaust...... Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 21, 2009 Author Share Posted April 21, 2009 My tolerence for noise is quite high Quote Link to comment Share on other sites More sharing options...
Dash Rendar Posted April 21, 2009 Share Posted April 21, 2009 So this was basically all down to have an exhaust that was too restrictive? Quote Link to comment Share on other sites More sharing options...
jevansio Posted April 21, 2009 Author Share Posted April 21, 2009 So this was basically all down to have an exhaust that was too restrictive? Partially true. I only swapped the rear muffler (both were 4" but one was longer). My main exhaust was the same before and after (3" DP/MP & 4" cat back exhaust). The thing I think made the biggest difference was removing the 4" butterfly valve I had in to control noise. Quote Link to comment Share on other sites More sharing options...
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