Ok.... Finally got everything running right, now it seems like there is no more power after like 4500, just revs, but no extra power, is it possible that my apex seals are bad?

Thanks

 

S4 or s5? Na or tii? Seriously doubt its your apex seals. They would cause less power everywhere if bad, or just blow, like mine. Could be secondary injectors, but they come on at 3800, not 4500. If you have an s5 it could be the VDI, but I'm not familiar with that too much. More info on your car would be helpful.

 

Looked on your past posts and saw you have an s5 na. I'd say its probably the VDI not operating properly and not opening when it should, thus giving you the same amount of air throughout 4500 rpm and above. That's my guess honestly. Hopefully someone else can chime in that is thoroughly experienced with s5 n/a's.

 

^this, something isn't working properly and opening the 5th/6th ports like it should

 

Yay I kind of know what I'm talking about. :P

 

if your RPM is going up but your speed isn't then I would be looking at the Clutch,maybe slipping or not doing it's job.