eyefi Posted August 10, 2004 Share Posted August 10, 2004 what is this quirky peak & dip at 4k on these single turbo dyno graphs? cheers. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 another Quote Link to comment Share on other sites More sharing options...
michael Posted August 10, 2004 Share Posted August 10, 2004 Odd, dips look just like the one you get on twins Quote Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted August 10, 2004 Share Posted August 10, 2004 What ECU is that running though?? Is it a standard ECU or an aftermarket unit? Ben.. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 eyefi it will be the ecu. you could tune it out with a standalone, but it will be the fueling on the stock ECU at the change over point. Quote Link to comment Share on other sites More sharing options...
Soonto_HAS_soop Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by Terry S eyefi it will be the ecu. you could tune it out with a standalone, but it will be the fueling on the stock ECU at the change over point. That's exactly what I was thinking that it was, but I wasn't sure of what ECU he was using. Ben.. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 bloody 'el. thats about a 50hp / 30ftlb drop on the 2nd graph. i wouldnt have expected to see such a big difference. i can understand it on the stock turbos because of what is physically happening with the prespool. man that would anoy the hell out of me. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 here's one with a VPC it still has the "wiggle" but not as pronounced and the AFR doesnt shift much at that point. its a shame there is no ignition timing graph on there too. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 here's another that has "untuned fuel" that does not have the wiggle but it looks like a highly averaged graph Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 doh! Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 10, 2004 Share Posted August 10, 2004 eyefi all this research and development, wheres it all going. are you writing a book? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 Eyefi I am not sure exactly how a VPC works. Generally things fudge the stock map. We have seen a car with an e-manage run Mad rich at this point which will lose lots of power, I have also seen a SAFC car run lean there both with singles. As I said a standalone will tune it out. Quote Link to comment Share on other sites More sharing options...
SimonB Posted August 10, 2004 Share Posted August 10, 2004 Surely you could also tune it out with an Emanage by adjusting the fueling at that point? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by SimonB Surely you could also tune it out with an Emanage by adjusting the fueling at that point? Doesn't seem so, we have it much better but not completely lineargoes 11.3>10.5>11.3. It is a Mines ECU though and does some very weird things. Will need to try a bog stock ecu and see. Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 cheers guys. monkey, its for my pamphlet "come on, lets tune the fuck out of it!" Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by eyefi cheers guys. monkey, its for my pamphlet "come on, lets tune the fuck out of it!" Put me down for 1 Quote Link to comment Share on other sites More sharing options...
eyefi Posted August 10, 2004 Author Share Posted August 10, 2004 would u like it laminated? Quote Link to comment Share on other sites More sharing options...
Lewis Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by eyefi would u like it laminated? That means he'll lick it till it shines A metaphor for life for us all? Quote Link to comment Share on other sites More sharing options...
MONKEYmark Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by stealthhosts That means he'll lick it till it shines A metaphor for life for us all? i once seen a metaphor shoot out the sky it had a flaming tail and landed next to my astra when i was in macdonalds drive through, the thing left a bloody great hole in the ground and scorched all the paint on my astra, it made all the paint loose its colour and turned it pink. it was like a mach 3 a bloody close shave. maybe i should write a book of my life Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 10, 2004 Share Posted August 10, 2004 I've got a power dip around 3750 to 4000rpm thanks to the transition point and it goes lean for me. I've got it fattened up but then the areas either side go rich. It is, in my opinion, tuneable with an E-Manage but I'm still working on it on mine. (brace yourself Terry) it's tricky with an AFR adjustment piggyback because of the extrapolation performed between load sites, if there is a small area where things go strange then not only do you need a start and end load site but also a lead-in lead-out site as well to counteract this extrapolation by flatlining it. As there are some very linear areas of the map and the E-Manage has 16 rpm sites, I reckon sacrificing some resolution at linear parts of the rev range is worth it so you can cluster four load sites around the 3500-4000rpm area to tune this behaviour out. So there -Ian Quote Link to comment Share on other sites More sharing options...
Miguel Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by Ian C I've got a power dip around 3750 to 4000rpm thanks to the transition point and it goes lean for me. I've got it fattened up but then the areas either side go rich. It is, in my opinion, tuneable with an E-Manage but I'm still working on it on mine. (brace yourself Terry) it's tricky with an AFR adjustment piggyback because of the extrapolation performed between load sites, if there is a small area where things go strange then not only do you need a start and end load site but also a lead-in lead-out site as well to counteract this extrapolation by flatlining it. As there are some very linear areas of the map and the E-Manage has 16 rpm sites, I reckon sacrificing some resolution at linear parts of the rev range is worth it so you can cluster four load sites around the 3500-4000rpm area to tune this behaviour out. So there -Ian Jezus you swallow an E-manage book Ian. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 Freak Seriously sure it can be done and it may just be the non stock ecu. Not many people have your time, patience or ability Chis Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by MONKEYmark i once seen a metaphor shoot out the sky it had a flaming tail and landed next to my astra when i was in macdonalds drive through, the thing left a bloody great hole in the ground and scorched all the paint on my astra, it made all the paint loose its colour and turned it pink. it was like a mach 3 a bloody close shave. maybe i should write a book of my life That wasn't a metaphor. That was a comment. -Ian Quote Link to comment Share on other sites More sharing options...
Ian C Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by migster Jezus you swallow an E-manage book Ian. No, but I'm writing one lol. Sometimes I wish I didn't know what I know because most of what I know I had to find out because the bastard car didn't work for some spurious reason that's never, ever the simple reason -Ian Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted August 10, 2004 Share Posted August 10, 2004 Originally posted by Ian C No, but I'm writing one lol. Sometimes I wish I didn't know what I know because most of what I know I had to find out because the bastard car didn't work for some spurious reason that's never, ever the simple reason -Ian You are just plain lucky..............jonah Quote Link to comment Share on other sites More sharing options...
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