GTP091 Posted April 13, 2011 Report Share Posted April 13, 2011 i'm in the process of gathering parts for a turbo system for my 91 DOHC GTP . My next purchase will be the waste gate. what size would be good for this setup? 50mm 40mm 35mm?? i imagine that the larger diameter allows better response from the turbo system but is to large a back pressure problem with the drop that would happen when the waste gate opens?? I can't seem to find much discussion about this. any insight is appreciated>. I will be using a T04E .85/3 turbine 60 trim in a twin scroll (maybe a B but not likely)- HKS blowoff valve - intercooler - catch can - and FMU. thanks, Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 13, 2011 Report Share Posted April 13, 2011 large wastegates = better for controlling boost at lower levels. and the opposite is true for smaller WGs. how much pressure are you looking to run? Quote Link to comment Share on other sites More sharing options...
GTP091 Posted April 15, 2011 Author Report Share Posted April 15, 2011 8 PSI max with the FMU maybe more if I can get tuning figured out later. Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 15, 2011 Report Share Posted April 15, 2011 8 PSI is a little over ~50% more fuel delivered than compared to WOT while N/A, are you sure a FMU can support that? Quote Link to comment Share on other sites More sharing options...
GTP091 Posted April 16, 2011 Author Report Share Posted April 16, 2011 8 PSI is as far as most will take a FMU. It seems they get less accurate after 6-7 PSI. Anything beyond 8 and I'd lose the FMU and go with raw tuning. OBD1 says I will be on the FMU for awhile though... There are a couple guys that ran FMU's up to 8 with no issues; they're on 60degreeV6 Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 16, 2011 Report Share Posted April 16, 2011 seems i should get going on the A1 boost code then.... Quote Link to comment Share on other sites More sharing options...
GTP091 Posted April 17, 2011 Author Report Share Posted April 17, 2011 seems i should get going on the A1 boost code then.... I take it A1 code would be suitable for a LQ1 on OBD1? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 17, 2011 Report Share Posted April 17, 2011 A1 was originally only used on the 91-94 3.1 cars(without 4T60E), but i've been adding in stuff to make it a bit more flexible to deal with anything from metro 1.0 and iron dukes to northstars. making a LQ1 run on A1 is cake, i just need to write the algorithm to deal with boost yet. Quote Link to comment Share on other sites More sharing options...
GTP091 Posted April 27, 2011 Author Report Share Posted April 27, 2011 In a year or so I would likely pay for that... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 27, 2011 Report Share Posted April 27, 2011 it's an open project on 60V6. Quote Link to comment Share on other sites More sharing options...
GTP091 Posted April 29, 2011 Author Report Share Posted April 29, 2011 i will go check that out. name of the thread?... Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted April 29, 2011 Report Share Posted April 29, 2011 http://60degreev6.com/forum/showthread.php/48100-nAst1-Progress-and-Concepts-Thread Quote Link to comment Share on other sites More sharing options...
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