Avinitlarge Posted November 11, 2018 Report Share Posted November 11, 2018 2 hours ago, lowkeyturbo said: Dont use the 540i 3.25 ID maf. It reads wrong for some reason 1.94 was giving me only 950 KG/Hr on a k24 at like 19 PSI.I put in the S90 MAF with 1.34 and same tune... was making 1070 kg/hr which is exactly what it should be making. BMW 540i Maf does not seem to read right. I noticed the same a few years ago, ive still been using the 540 maf though. Personally I think it would be impossible to get the exact calibration without the maf being tested with some sort of air flow testing equipment Quote Link to comment Share on other sites More sharing options...
wildstyle Posted November 11, 2018 Report Share Posted November 11, 2018 1 hour ago, Avinitlarge said: I noticed the same a few years ago, ive still been using the 540 maf though. Personally I think it would be impossible to get the exact calibration without the maf being tested with some sort of air flow testing equipment From what everyone, including Aaron, has said, it's because the sensor doesn't sit in the middle. I'm going to try to modify the placement of the sensor by removing material from the mounting point to center it better. Quote Link to comment Share on other sites More sharing options...
Dangerous Dave Posted November 11, 2018 Report Share Posted November 11, 2018 (edited) 10 hours ago, lowkeyturbo said: Dont use the 540i 3.25 ID maf. It reads wrong for some reason 1.94 was giving me only 950 KG/Hr on a k24 at like 19 PSI.I put in the S90 MAF with 1.34 and same tune... was making 1070 kg/hr which is exactly what it should be making. BMW 540i Maf does not seem to read right. I'll give it a go since I've already got it and see what results I get. Thanks for the heads up :-) Oblark had an issue with the sensor sealing in the 3.25 housing. http://www.vpcuk.org/forums/archive/index.php/t-54663.html Edited November 11, 2018 by bomb192uk Quote Link to comment Share on other sites More sharing options...
oblark Posted November 11, 2018 Report Share Posted November 11, 2018 4 hours ago, bomb192uk said: I'll give it a go since I've already got it and see what results I get. Thanks for the heads up :-) Oblark had an issue with the sensor sealing in the 3.25 housing. http://www.vpcuk.org/forums/archive/index.php/t-54663.html If I remember correctly the BMW housing doesn't have a chamfer were the sensor fits in to allow for the O ring on the Volvo sensor so I either fitted a thinner O ring or made a rubber gasket but I can't remember. 1 Quote Link to comment Share on other sites More sharing options...
Avinitlarge Posted November 11, 2018 Report Share Posted November 11, 2018 Shem uses instant gasket in them now and it works fine 1 Quote Link to comment Share on other sites More sharing options...
Fruwer Posted November 12, 2018 Report Share Posted November 12, 2018 Hi i have a problem with COP mod. i was running on other ecu for 4 years all was ok . Made new one for other car , now i have burning ignition coils.. i run car 15min coils gets very hot , i loose spark to cylinders ant coils melts. Anyone have some tips? checked SMD all looks ok. Quote Link to comment Share on other sites More sharing options...
Avinitlarge Posted November 12, 2018 Report Share Posted November 12, 2018 Did you fit all 12 resistors? Quote Link to comment Share on other sites More sharing options...
Fruwer Posted November 12, 2018 Report Share Posted November 12, 2018 15 resistors Quote Link to comment Share on other sites More sharing options...
Avinitlarge Posted November 12, 2018 Report Share Posted November 12, 2018 Only 12 are needed, the other 3 are for a 6th coil which we don’t need Quote Link to comment Share on other sites More sharing options...
Fruwer Posted November 12, 2018 Report Share Posted November 12, 2018 (edited) yes i look i see that 1(35) pin is not need , but i installed and there , never checked before. but i was running same in other car Edited November 12, 2018 by Fruwer Quote Link to comment Share on other sites More sharing options...
Avinitlarge Posted November 12, 2018 Report Share Posted November 12, 2018 It doesn’t make any difference if you fit them or not. I’ll help you via message to stop this thread being full of in needed posts Quote Link to comment Share on other sites More sharing options...
Piet Posted November 13, 2018 Report Share Posted November 13, 2018 are you using the same dwell tabels as before? Sounds like you aver overdwelling them. Quote Link to comment Share on other sites More sharing options...
Avinitlarge Posted November 14, 2018 Report Share Posted November 14, 2018 Just a little something Ive had made whist Im unable to do anything else. Based on Razorx's design from a few years ago 3 Quote Link to comment Share on other sites More sharing options...
Fruwer Posted November 19, 2018 Report Share Posted November 19, 2018 On 13/11/2018 at 1:00 PM, Piet said: are you using the same dwell tabels as before? Sounds like you aver overdwelling them. Yes. Problem was ecu. Bought another, soldered , all perfect now Quote Link to comment Share on other sites More sharing options...
oblark Posted November 26, 2018 Report Share Posted November 26, 2018 Hi, As the weather getting colder here in the UK I've noticed when the car is started from cold it runs very rich (AFR of 10) When rev'd it doesn't pick up and when it does black smoke comes out of the exhaust, after 5 minutes of idling it runs fine. So I'm thinking as it's now a 2.5 ltr the warm up tables need tweaking, so which warm up table needs adjusting ? Thanks Quote Link to comment Share on other sites More sharing options...
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