TheBoostNazi Posted June 2, 2011 Share Posted June 2, 2011 So I was open source tuned stage 2 with an avo tmic/forge bpv, catless tbe. I'm going to a racer-x FMIC, is a retune completely necessary due to the potential response lag? I will be using the same bpv. thanks 08 LGT 5EAT Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 oh come on... Link to comment Share on other sites More sharing options...
Mega Users LieutenantDan Posted June 2, 2011 Mega Users Share Posted June 2, 2011 You and Payback45 should get a room, or perhaps your own forum... What is response lag? Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 my question is basically in regards to the tune itself, not the response... Link to comment Share on other sites More sharing options...
Mega Users LieutenantDan Posted June 2, 2011 Mega Users Share Posted June 2, 2011 I understand the question just fine... Now ask yourself this question. Do you honestly think your car's operating behavior will be unaffected by tripling our quadrupling the amount of charge space between your turbo and the throttle body? Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 I was suspect. Now, about the tune. What behaviors in the tune change with the increased charge space? Link to comment Share on other sites More sharing options...
Spec B Posted June 2, 2011 Share Posted June 2, 2011 I do not think a retune will be required, but you will probably not hit your target boost and I am guessing you will make less power overall. When I upgraded to a FMIC (from a perrin TMIC) I was able to add a little more timing and had to add more WGDC to hit the same boost. Not sure if that is normal, but that's how it worked for me. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 Any issues with knock? Link to comment Share on other sites More sharing options...
Spec B Posted June 2, 2011 Share Posted June 2, 2011 No, not in my case. You should log tho. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 I will, I figured the WGDC would need to be lowered for a given requested torque in order to push more through the system. I'm familiar with romraider and ecu edit, i wish i could make these adjustments myself....i just do not know what would have to be changed Link to comment Share on other sites More sharing options...
Spec B Posted June 2, 2011 Share Posted June 2, 2011 More WGDC (not less) = more boost. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 lol probably woulda caught on real quick if i did so... Link to comment Share on other sites More sharing options...
Spec B Posted June 2, 2011 Share Posted June 2, 2011 Check this out..good tuning guide. https://sites.google.com/site/asubienewbietuningguide/ver-1-0 Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 2, 2011 Author Share Posted June 2, 2011 just what i was looking for! thanks! Link to comment Share on other sites More sharing options...
bugblatterbeast Posted June 4, 2011 Share Posted June 4, 2011 http://legacygt.com/forums/showthread.php/fmic-vs-tmic-144786.html?t=144786&highlight=tmic+fmic the data speaks for itself..... and that's just the change in charge temps. tip-in will be totally off going from a tmic to a fmic. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 5, 2011 Author Share Posted June 5, 2011 interesting. so it seems you find the load increases by .3 from the increase in flow through a fmic? do you think the vf46 flows enough for a fmic? what kind of increases should i expect coming from an vo tmic? Link to comment Share on other sites More sharing options...
bugblatterbeast Posted June 6, 2011 Share Posted June 6, 2011 interesting. so it seems you find the load increases by .3 from the increase in flow through a fmic? do you think the vf46 flows enough for a fmic? what kind of increases should i expect coming from an vo tmic? fmic is probably not worth it on a vf40. depends on your budget I assume you were making reference to the plots I posted in the tmic vs fmic thread. the vf40 at ~6k is flowing about as much as the avo380 + fmic at ~ 4k.... which is roughly where the tmic and fmic plots for the 380 diverge. below that point there was little difference, so a vf40 below 6k won't really benefit much from the fmic. IIRC, the fmic makes a difference once the flows exceed the high 20s lbs/min if you really want to know for sure, attach a pressure gauge before and after the heat exchanger core and log the pressure drop as a function of flow. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 6, 2011 Author Share Posted June 6, 2011 I was reading some material on air density verse flow, obv the vf46 flows enough for a tmic but the outlet temps are higher than of a fmic, essentially its the opposite with a fmic, the flow is less but the outlet temps are lower, which would have more of an effect on power production, the air temp(density) or the flow? Link to comment Share on other sites More sharing options...
GTTuner Posted June 6, 2011 Share Posted June 6, 2011 temp compensation tables should be adjusted for timing and boost at minimum IMO. Link to comment Share on other sites More sharing options...
TheBoostNazi Posted June 6, 2011 Author Share Posted June 6, 2011 yeah I plan for a retune either way, the tuner still recommended the FMIC with the 46 at stage 2. I'm rather familiar with the tables in ECU editor, I'm slowly learning tuning theory and would like to get a grasp of the changes required with the changes in physics with a fmic. Link to comment Share on other sites More sharing options...
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