Hi guys, me and my friend Hybridchemistry we intend to run an old busted 1981 200sx (s110) in the 24 hours of lemon. (http://www.24hoursoflemons.com/). If you've missed my "hello" thread, I am new here and I shall post all about this fantastically stupid project in the project thread very soon. So far we've been rebuilding the engine and are looking for ways to cheaply increase power a bit.
Since the 24 hours of lemons rules are very strict on prep budget ($500 max for car + prep) and since we spent already $250 for the car and about as much for gaskets + rings + misc stuff to rebuild the engine, we're looking at um... not much left. :D So when I say "cheap ways of improving performance" I should really say $0.00.
As you all probably know the s110 has the Z20E (lame), NAPZ (LAME!), engine *WITH* injection (SUPER LAME!). To me the thing is a testament to overly engineered, overly complicated, early 80's injected non-sense. But maybe someone in here can prove me wrong? Now if I had more money than sense I would probably buy some mikunis side draft carburetors, rip out the ECU + injectors, add the Z18ET turbo and exhaust, etc... but that would never fly with the lemons judges at the BS inspection and they would slap me 1,000 laps. (and that would be generous of them).
SO! Since this car is NOT intended to be street legal, my idea for now is to take out as much as possible of the emission control system + increase air flow. Now the following is going to give some peoples a heart attack. Keep in mind that I know next to nothing concerning emission control so this is NOT what I actually plan to do. This thread is mainly aimed at getting constructive comments from knowledgeable peoples who know way more than I do and tell me whether those mods are realistic or not. The schematics are taken from the shop manual for the specific year and model for the car and the Haynes manual.
Crankcase Emission Control System.
This mod seems like a no brainer. I am not too sure about the idle screw. It is not present in the 1980 model for some reason...
EGR
This also looks like a no brainer.
Fuel evaporation system
WHY can't the fuel system be simpler? Fuel in, fuel out, done? no?
Vacuum control valve
This is really meant to minimize back firing... do I care?
Vacuum switching valve
WTF is this for??? Both the Haynes and the shop manual are very terse about this little guy. delete?
Catalytic converter + muffler
Delete, replace with straight pipe + glasspack. yes?
Thanks!