Quote:
Originally Posted by beepbeep
It doesn't quite work that way. Turbo sucks trough barn door so CIS doesn't know/care about turbo efficiency. It just dispatches fuel according to air inhaled.
I believe you raised AFR's by new turbo "missing" to hit the fat range by developing boost later. also, you might have corrected previous boost leak which might have contributed to overrich condition.
Better efficiency will develop more power though. So will "less fat" AFR's.
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Boost now kicks in a little later thats correct, with headers and decat I see boost around 300rpm later now compared to the 7200.
Thinking of boost leak, how could I have fixed a boost leak by just changing the turbo? I didnt touch the intake or took off the intercooler. Just took off the rear bumper and swapped the turbos... left L shaped inlet pipe was tight aswell as hose to intercooler. Car ran great with the 7200 stock turbo apart from the typical too rich condition.
Maybe the car is not running pig rich in midrange now because the boost kicks in later, but it is really not a big difference compared to stock, just a slight moment later.
Performancewise with the 7006 it is far better than before, absolute digital powerdelivery, thats what I like! First almost nothing, then all!!
As far as I know the stock WUR starts to enrich when it sees a certain amount of boost, the 7006 spools later so the fat midrange almost got deleted, could this be the cause? Before I saw low to mid 10s up to 4400rpm, now only 10,8 very short and after that mid to high 11s.
It wasnt my intention to cure the fat AFRs by swapping the turbos, I just wanted some more punch up top thats why I took the 7006. But I really like what my AFR gauge is telling me since the new turbo is installed.
Here is a video of my AFR gauge with the stock turbo installed:
http://www.youtube.com/watch?v=wINZmmarzsw
You can see the 10s for quite a while up to 4300-4400rpm.
It is not the best video because I used the 2nd gear, 3rd or 4th starting from 2000rpm would have been better.
I am not selling my stock 7200 turbo btw, but might change my mind in the near future and will let you know, thanks for the PMs and for your interest.
