fentin_fury Posted July 12, 2008 Share Posted July 12, 2008 Good day I require some help (put in your own joke here) I was tuning today and noticed my timing was not varying. The reason for this is the “expert†tuner I had taken my car to has messed up the timing curves. The baseline curve seems fine – ramps up from 14°at idle to 30° at 4000 rpm and then stays flat. However my MAP curve (which adds or subtracts timing from the base line) is all positive – and by a lot! At 20lbs boost I would have been running 38° total advance. I can’t believe that is correct. What has saved me is upon building the new engine I had set the max advance to 26°. Does anyone here have a curve that I could start with – timing vs. boost levels? 240ztt sent me one about 2 years ago – but I can’t find it and it is not posted. RB26 Tomei stage 2 cams Ported head Tomei pistons, rods 9.5:1 compresssion Hks GT-RS twins Any help appreciated. Q Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 If you are a member of the yahoo rb26 group i have a file in there from when i had stock turbos and 444cc injectors. it should be close i will see if i can hunt it down Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 Here ya go. This was pretty rough start. it made 320 to the wheels on the stock turbos and stock boost. once we got it to the dyno and cleaned it up some we made 352. What ems are you using?? rpm ign value ret man press 500///// 20 28.5 0 750//// 20 27.1 0 1000//// 20 25.7 0 1250 21 24.2 0 1500 23 22.8 0 1750 25 21.4 0 2000 27 19.9 0 2250 29 18.6 0 2500 31 0 0 2750 33 3.46 1 3000 35 4.16 2 3250 36 4.86 3 3500 37 5.56 4 3750 37 6.25 4 4000 37 6.95 5 4250 37 7.65 9 4500 37 8.35 10 4750 37 9.05 10 5000 37 9.75 11 5250 37 10.4 11 5500 37 11.1 11 5750 37 11.8 12 6000 37 12.5 12 6250 37 13.2 12 6500 37 13.9 12 6750 37 14.6 12 7000 37 15.3 12 7250 37 16 13 7500 37 16.7 17 7750 37 17.4 17 8000 38 18.1 17 8250 38 18.8 18 8500 38 19.5 20 8750 38 20.2 20 30 20 Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 well that is hard to read:x Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 see if this better map.txt Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 if that is too hard to read PM me your email and i will send the excel doc that has all the columns lined up and is allot easy to decipher Quote Link to comment Share on other sites More sharing options...
stony Posted July 12, 2008 Share Posted July 12, 2008 for those that may come across this later the first column is rpm second column of numbers is base timing at that rpm the third column is man pressure and 4th column is the amount of timing that is pulled or retarded at that specific pressure. Quote Link to comment Share on other sites More sharing options...
Careless Posted July 13, 2008 Share Posted July 13, 2008 The reason for this is the “expert†tuner I had taken my car to has messed up the timing curves. Mr. PN ? won't say anything, just wondering. Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted July 13, 2008 Share Posted July 13, 2008 Here is one I use... click it Quote Link to comment Share on other sites More sharing options...
jonnyringo Posted July 13, 2008 Share Posted July 13, 2008 what EMS is this for? Quote Link to comment Share on other sites More sharing options...
stony Posted July 13, 2008 Share Posted July 13, 2008 I had a friend ask me a question about my map that reminded me about something. That map was built in japan using hi oct pump gas. Some say their gas is in the 95-98 oct range. so if the timeing looks a little aggressive well that is why Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted July 13, 2008 Author Share Posted July 13, 2008 thanks everyone! Gives me a base to work with exactly what i needed. Q Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted July 13, 2008 Author Share Posted July 13, 2008 Mr. PN ? won't say anything, just wondering. yes and don't Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted July 13, 2008 Author Share Posted July 13, 2008 i've compared Stony's and J's - very similiar thanks again q Quote Link to comment Share on other sites More sharing options...
Careless Posted July 14, 2008 Share Posted July 14, 2008 yesand don't no worries. seems a little unlike him though, but what can ya dooooo. as long as no damage was done. Quote Link to comment Share on other sites More sharing options...
fentin_fury Posted July 26, 2008 Author Share Posted July 26, 2008 Well I was happy with the timing curve and did some more tuning today. Finally increased the boost. Adjusted from 9lbs (lowest boost I can have with the upgraded springs in the wastegates) to 20lbs. Now it hauls hard.... hunting for traction in 3rd with the RA1 245/45/16s. No indication of detonation so i am sure i could increase the boost some more but with the rubber i have there would be little point. will try to get to a dyno soon and post some numbers. Stony I will post the timing curve on here tomorrow. Q Quote Link to comment Share on other sites More sharing options...
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