Why does my 5sfe cut out a lil after 5k Options

[YotaLover]

ok i've done a full tune up on my 95 gt and it still cuts out at 5grand and i was wondering if its just susposed to do that or what else could it be cause i cant figure it out and i was wondering if any one has had the same problem....PLEASE HELP ME!!!!!

[m4dm4n]

5SFE's aren't high revving engines, the head design is great for making gobs of low end torque but higher in the rev range it loses volumetric efficiency. I believe power starts falling somewhere after 5000 Rpms

Pretty much, yep.
Google a dyno chart for stock 5S engines and look at the curves. Without spending a few $$$ you won't get very much after just under 5K rpm.

There's heaps of info around about rebuilding the 5SFE engine to give more at the high end (read up some of the 5SFTE builds - some of the really serious guys that turbo these also go into cam regrinds, bigger valves etc) but by the time you've spent all that cash, you may as well have done a swap with one of the gruntier 3SGx(x) engines and maybe saved some bucks.

I've personally been considering setting up FI on mine mostly because it's easier in the sense that the parts are easier to get a hold of than a 3SGTE cut and so far the $$ difference between the two kinda pushes me more and more towards the mod and away from the swap.

Pretty sure I've seen a post or two about higher end power on here already...?