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#3
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primary concern is fuel system.
conservatively, the stock fuel system is good for around 8, at which point the fuel pump becomes the weak link.
upgrade the fuel pump and then your good for 12, at which point the stock turbo is pushing hot air ...you can upgrade the intercooler or compressor to keep intake temps low
visit http://www.rx7.com/cgi-local/2ndgencalc.cgi to see your injector needs based on the power you want to make
also, timing is a concern after 8.6 psi ...anything after that and the stock computer doesn't retard timing ...and being that you also have higher compression rotors that is even more of a problem
some have pushed beyond the boost pressure i suggested ...but i am being conservative as mentioned ...too many things can pop a motor, better to be on the safe side. you can get a popoff valve as well
conservatively, the stock fuel system is good for around 8, at which point the fuel pump becomes the weak link.
upgrade the fuel pump and then your good for 12, at which point the stock turbo is pushing hot air ...you can upgrade the intercooler or compressor to keep intake temps low
visit http://www.rx7.com/cgi-local/2ndgencalc.cgi to see your injector needs based on the power you want to make
also, timing is a concern after 8.6 psi ...anything after that and the stock computer doesn't retard timing ...and being that you also have higher compression rotors that is even more of a problem
some have pushed beyond the boost pressure i suggested ...but i am being conservative as mentioned ...too many things can pop a motor, better to be on the safe side. you can get a popoff valve as well
#4
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Join Date: Aug 2005
Location: fort worth texas
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so should i stick with s4 rotors then, and upgrade my fuel system and and intercooler and get an aftermarket ecu? if so what am i lookin at running on stock rotors?
btw, what im doing is buyin an s4 tII missing the motor and tranny. im puttin in a new tranny and im gonnna buy a motor, rebuild it and port it (depending on how much it costs to get it ported cuz i cant do that myself). then, once its running my goal is to get it to14sec in the quarter, and still be driftable.
just in case anyone cared.
btw, what im doing is buyin an s4 tII missing the motor and tranny. im puttin in a new tranny and im gonnna buy a motor, rebuild it and port it (depending on how much it costs to get it ported cuz i cant do that myself). then, once its running my goal is to get it to14sec in the quarter, and still be driftable.
just in case anyone cared.
#7
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a stock TII runs 14"s?
and i can definitely afford 350 for a street port.
ive got a few more questions about boost and compression ratios so im makin a new topic
thanks guys
and i can definitely afford 350 for a street port.
ive got a few more questions about boost and compression ratios so im makin a new topic
thanks guys
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