forcedinductiongt Posted October 7, 2013 Share Posted October 7, 2013 Today I installed a 2007 STI uppipe and invidia catless dp into my 2006 LGT 5EAT. I'm 17 years old, it took about 7 hours doing it alone on axle stands lol. I have Cobb v3 to go along with it, and when I reflashed to stage 2 and drove it (no problems, smoke, leaks etc.) It seemed faster than stage 1, but not as much as I was expecting. My question is: does the ecu take time to get used to and adjust to the new mods? Link to comment Share on other sites More sharing options...
PtPixel Posted October 7, 2013 Share Posted October 7, 2013 Not really, as with any time you reset the ECU it will start with an IAM (ignition advance multiplier) of 0.5-0.75 then after a bit of driving it will rise to 1. So there is a slight difference in ignition advance until the multiplier reaches 1. Also any time you reset the ECU the computer will relearn the fuel trim adjustments. Unless you've got something wrong with your intake then these will be minor adjustments (+ or - 1%) and unnoticeable. The map that is flashed on by the AP is used by the ECU immediately to control the engine, so the IAM and fuel trims are the only part that the ECU will adjust to. A dyno/e-tune will always be better (in terms of power and reliability) than the off the shelf cobb maps as they're tailored for your specific car and engine. That might get you a bit more power but nothing amazing. TL;DR - No the ECU doesn't really need to adjust. Stage 2 isn't hugely powerful (although compared to stock it is a big improvement), it is just a retune of your stock parts + new DP Link to comment Share on other sites More sharing options...
forcedinductiongt Posted October 7, 2013 Author Share Posted October 7, 2013 Not really, as with any time you reset the ECU it will start with an IAM (ignition advance multiplier) of 0.5-0.75 then after a bit of driving it will rise to 1. So there is a slight difference in ignition advance until the multiplier reaches 1. Also any time you reset the ECU the computer will relearn the fuel trim adjustments. Unless you've got something wrong with your intake then these will be minor adjustments (+ or - 1%) and unnoticeable. The map that is flashed on by the AP is used by the ECU immediately to control the engine, so the IAM and fuel trims are the only part that the ECU will adjust to. A dyno/e-tune will always be better (in terms of power and reliability) than the off the shelf cobb maps as they're tailored for your specific car and engine. That might get you a bit more power but nothing amazing. TL;DR - No the ECU doesn't really need to adjust. Stage 2 isn't hugely powerful (although compared to stock it is a big improvement), it is just a retune of your stock parts + new DP Thanks a ton, I'll definitely consider a professional tune...but who knows, maybe a vf39 is in my future Link to comment Share on other sites More sharing options...
McDowell Performance Tunin Posted October 7, 2013 Share Posted October 7, 2013 VF-52 would be a much easier swap www.facebook.com/mcdowelltuning [sIGPIC][/sIGPIC] Click Here for Stage1, Stage2 and Stage3 Tuning and eTuning Info Link to comment Share on other sites More sharing options...
PtPixel Posted October 7, 2013 Share Posted October 7, 2013 aren't the 39,48 and 52 essentially the same turbo? 52 is the latest revision so more reliable, have heard of waste gate cracking issues with the 39 Link to comment Share on other sites More sharing options...
McDowell Performance Tunin Posted October 7, 2013 Share Posted October 7, 2013 aren't the 39,48 and 52 essentially the same turbo? 52 is the latest revision so more reliable, have heard of waste gate cracking issues with the 39 The 39 in the 48 are sti fitment. The 52 is for the 09 and newer WRX which has the same basic intercooler/bpv configuration as the 4th gen LGT Sent from my SAMSUNG-SGH-I747 using Tapatalk now Free www.facebook.com/mcdowelltuning [sIGPIC][/sIGPIC] Click Here for Stage1, Stage2 and Stage3 Tuning and eTuning Info Link to comment Share on other sites More sharing options...
PtPixel Posted October 7, 2013 Share Posted October 7, 2013 Oh right, VF52 is flanged on the discharge side, 39 and 48 aren't Link to comment Share on other sites More sharing options...
iNVAR Posted October 8, 2013 Share Posted October 8, 2013 The difference from bone stock with no tune at all to Stage 2 with a tune should be a pretty good jump. If you're saying it didn't feel that much faster, either 1) you're used to faster cars 2) your sense of speed is out of wack 3) something is wrong How much boost are you making according to the AP? Better yet, pull a datalog. Link to comment Share on other sites More sharing options...
forcedinductiongt Posted October 8, 2013 Author Share Posted October 8, 2013 I could feel a significant difference from stock to stage 2...it's stage 1 to stage 2 that I'm referring to. Don't get me wrong though, I definitely feel and hear a difference, it just wasn't as big of a power jump that I felt from stock to stage one...and let's definitely keep this turbo conversation going haha would the vf52 be a direct bolt on swap followed by a pro tune? Link to comment Share on other sites More sharing options...
iNVAR Posted October 8, 2013 Share Posted October 8, 2013 Stock to stage 1 isn't really a power upgrade. It's more of a driveability upgrade. Stage 2 should've been a bigger jump from stage 1 as far as feel goes. You really should pull that datalog to be on the safe side. Link to comment Share on other sites More sharing options...
Berzerklo Posted October 8, 2013 Share Posted October 8, 2013 Stock to stage 1 isn't really a power upgrade. It's more of a driveability upgrade. Stage 2 should've been a bigger jump from stage 1 as far as feel goes. You really should pull that datalog to be on the safe side. This. Stage 1 was only noticeable to me since I drive it everyday. Stage 2 should feel substantially different. Link to comment Share on other sites More sharing options...
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