ok i know that the rotary increses rpms when u modify, i got a turbonetics 62-1 94 ar with a haltech f10 on a streetported motor how should i fine out my redline

 

Rev it as high as it'll go

</sarcasm>

S4's redline at 7k, S5's redline at 8k due to lighter internals.

You don't need to go higher then 8k, there should be fuel cut somewher eon s5 it's 9k i believe, engines not gonna blow if you go past the redline it's just not good.

and when you modify a rotary like you have, it doesnt raise the redline lol.

 

No point of raising the redline if the car doesn't make anymore power past 8k

 

No. The S5's redline is higher because it makes it's top power higher. It has much more to do with the improved manifold than the internals.

Rotary + Maxed injectors duty cycle = Very bad stuff.

I agree. Pretty much the only times someone will need a significantly higher redline would be with very large porting jobs (bp, pp, jp, etc.)

 

You're confusing redline and peak power. The S5 makes its power up higher mainly due to the different manifold, but the redline has NOTHING to do with that and EVERYTHING to do with the engine internals. Redline is the maximum speed that the engine can do without risk of permanent damage.

Unless you're upgrading engine INTERNALS, your redline doesn't change.