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wideband on stock viggen Posted by jak [Email] (#195) [Profile/Gallery] (more from jak) on Tue, 18 Oct 2005 11:23:19 Members do not see ads below this line. - Help Keep This Site Online - Signup |
these cars run damm lean under boost till about 5000RPM & go into closed loop realy fast on cold start up as well
they start off at stoich around 2000RPM WOT & thru the meat of the pull up to 4500RPM are 14:1 - 13.5:1 it not till after about 5000RPM that they start to taper things down to where Id like them to be pretty well across the board at full boost which is around 11:1
I can see clearly how adding an intercooler to this would only make it even worse with stock SW
it seems as though the stock SW was trying to make moderate power while keeping emissions under full boost as low as possible without killing the engine & then to keep high speed pre ignition down they richen it up late in the pull
it seems to me no wonder they broke some pistons
my plan of atack is to keep AF ratios totally stock part throttle, idle & cruise but get things a fair amount richer then stock at WOT full boost
I plan to use biger then stock injectors to help with this on higher stages
Ill post more on this later
take care
JAK
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