Is NA better with a turbo or the turbo 2 engine is better? or what performance could get that kind of power im still new on the rotary even tho i own 2, n own one of them for a 1 year and 5 months

 

For 380 to the wheels, you need a turbo engine.

 

Why a fascination with 380hp? Why not 379?

To start, about $5-10k to throw at it
Big turbo & manifold
Standalone EMS
Better fuel pump
Bigger injectors
Aftermarket FPR
FMIC
Bigger wheels and tires
Odds and ends to make it work

 

Don't forget the AI injection.

 

brakes, suspension, clutch, etc.

 

all i got is tokico Suspension

 

Basically I'm asking if it's better to turbo the NA engine or the Turbo 2 engine, some shop around here told me it's better to boost the NA motor instead bc it runs a lower compression ratio. I was under the impression that NA engines run a higher compression ratio than a turbo'ed one, or does rotary engines have an exception.

 

The turbo versions run a lower compression, which is why the redline is lower on a turbo than an N/a engine. Modify a factory turbo engine.

 

Never go to that shop again. Ever.

 

The compression difference doesn't dictate the redline. S4 TII and N/A were 7k redline, S5 TII was 7k redline, and S5 n/a was 8k redline. That is probably due to differences in intake design.

 

Redline indicates mechanical limits of the engine. Passing them would damage the engine. The intake has nothing to do with this.

S4 and earlier rotors are cast iron. (Note the sandy, grainy texture of the surface of the rotor surface as well as the wide variances in weight.

S5 rotors are cast, then machined. (Note the milling lines in the dished area of the rotors.)


The S5 rotors have much better tolerances and therefore more predictable clearance between the rotor and housing. They are also more consistent in weight, and therefore more balanced. This results in less strain on bearings and less lateral loading on the eccentric shaft.

With S5 rotors, it's just a little closer to having a blueprinted and balanced engine.

This is what makes it more tolerant of the higher RPMs.

However, it should be noted that the Apex seals will chatter against the rotor housings at as low as 7000-7500 RPM... While short stints at this speed are okay, sustaining it will cause excess flaking of your chromium plating and low compression. Solution would be to use carbon, ceramic, or other composite apex seals. (However these are light weight and will not seal as well, resulting in low compression at low engine speeds. They also wear out faster. Pick your poison)

 

this setup will push over 400 +

http://s45.photobucket.com/albums/f58/MFRX7FAN/Blue/

 

400hp in a SA, what kind of rear are you using and are those panasports I see.
Do you have traction issues?

 

you can make 380 easily on pump gas and stock ports.. just gotta get a decent sized turbo and a good tune

 

I disagree.

I say again that the S5 TII was a 7k redline vs the n/a 8k redline. If what you say is true, why the 1 k difference using the same rotors (of course the compression difference)? Plus the S5 n/a has the VDI system which shows power through the whole range of the engine.

I am willing to bet that the S5 TII intake isn't designed for flow over 7k, making a higher redline useless. I do know that the S5 TII intake is starting to restrict my air flow at 4k rpm or so when run as an N/A.

 

Forget the intake, stock ports make the high redline useless.

Perhaps the turbo redline was lowered to protect the turbocharger?

 

well good luck im building an N/A as powerfull as i can.RX8 rotors,shaft,going carb,wild porting,blah blah.lol.n/a r fun.more of a challenge and last longer so the forum says.

 

im still kinda confuse so which one would give me a great engine reponse?

 

i have been fighting about this with my s4 friends for awhile now lol... thanks for clearing it up for me

 

na there not panasprot