1sik33 Posted March 31, 2009 Share Posted March 31, 2009 Hi guys, What do you think is the maximum horsepower which is safe to run at without disaster on my daily used Nissan Skyline 1997 GTS25T. looking at upgrading to reach max potential through upgrading fuel pump, injectors, regulator and a Link g4 storm computer. What size pump and injectors would you recommend? i was thinkin 500hp pump with 650cc injectors. Currently has a T3/to4e turbo with 40mm external and a intercooler around 700x300x70 (not too sure about the size will have to check). Was aiming for about 400hp realistic? Anyways apprieciate any help! Cheers Lionel Quote Link to comment Share on other sites More sharing options...
240Z_Master Posted March 31, 2009 Share Posted March 31, 2009 I think you'll be jsut fine. 400HP with a huge turbo and some tuning is very obtainable. Especially if you're upgrading injectors and taking care of good fuel delivery. Quote Link to comment Share on other sites More sharing options...
Canadianz Posted March 31, 2009 Share Posted March 31, 2009 I'm interested to hear how the link ecu works out for you, Im looking at o one as well. I have heard that the rule with RB injectors is that basically a cc per hp... so theoretically 550cc injectors should be able to power about 550 horse power. I think alot of the fellas around here until they get into the really big numbers are just running the walbro 255 pumps. From the experinces of people on the board it seems that around 500 hp things start breaking on the stock engines. Check out James Thagards build for more info on that ... oh yeah and you might want to look into an alkymeth kit, there good for suppressing dedonation. Quote Link to comment Share on other sites More sharing options...
1sik33 Posted April 1, 2009 Author Share Posted April 1, 2009 Thanks for the help guys. Intercooler is infact a 700x300x70 and turbo is a t3/t4 to4e. The RB25s have side feed injectors correct me if im wrong? so 550 cc injectors would be big enough to see me into the 400hp range? i was thinking 650cc just to be sure fuel supply would be excellent and not lean out on me in the top end but if 550cc is enough i wouldnt want to go overboard with 650cc when i dont intend on replacing internals with forged anytime soon. Anyone roughly know how many PSI of boost to make 400-450 hp?? Quote Link to comment Share on other sites More sharing options...
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