dyno tuning trouble
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dyno tuning trouble
my turbo n/a project is done and i have had lots of problems at the dyno.
ok i have been to the dyno twice and both times the Afc has worked backwards. the wiering is all in line so i dont know what the deal is there but to day we started to tune and for some reason it would not hold boost. so may be there is a boost leak some where in the system or the boost controler is bad or the wastgate is opening. what is the stock spring in that wastegate? the car would make boost to about 4.2 psi and then at 5 thousand rpms it would dye off completly. any input would be a great help. every thing is S5 including the turbo.
ok i have been to the dyno twice and both times the Afc has worked backwards. the wiering is all in line so i dont know what the deal is there but to day we started to tune and for some reason it would not hold boost. so may be there is a boost leak some where in the system or the boost controler is bad or the wastgate is opening. what is the stock spring in that wastegate? the car would make boost to about 4.2 psi and then at 5 thousand rpms it would dye off completly. any input would be a great help. every thing is S5 including the turbo.
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how are the setting wrong i diid every thing to the book. does any one know what the stock wastegate spring is? i pinched the W/G hoes to the boost controler and it boosted over 4 psi after that it never went over that before.
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#9
spending too much money..
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I've heard of the safc being *** backwards like that on more than one occation. Do a search for it and see if you find out what the other people did. Mine worked fine when I had it so when I would do searches and see that I would just kinda skip over it but it has deffinatley happend more than once and has been covered on this site.
#12
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i'm not sure, i only helped do some minor tuning though it still has some issues. i personally did not like the manifold design(2 exhaust port runners facing the other 2 then a 90 degree out the exhaust seemed inefficient) i didn't drive it and he was rather babying it until we got to cruise and did some 4th gear pulls and the wideband was giving me some irregular readings so i told him to repair a few issues and we will try again. i guess time will tell how well it will be, til then he needs to do some more work on it, it doesn't seem like an easy setup to me because the Z32 MAF was fighting us as well the a/f readings but i did not do the install so i can't comment on whether it is setup correctly or not.
my engine now is torquey enough for me, it has good low and and good turbo and throttle response. i hardly work on anything other than 7s so it is hard to compare unless vs a V8 and there is no comparison between the 2 power curves then.
my engine now is torquey enough for me, it has good low and and good turbo and throttle response. i hardly work on anything other than 7s so it is hard to compare unless vs a V8 and there is no comparison between the 2 power curves then.
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ok the afc is stright now but still the boost dies at 6 thousand RPMs. there is plunty of fuel its like the redline is set at six grand its very strange. anyone know why it would do this?
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it seems like it has something to to with the electronicts because it dies right around 6000 rpms at any boost. i did put in a new larger muffler, wounder if that would do it? but i love how the car sounds with it, nice and slient.
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