What is the best value? both power and reliability? I was all about the KW kit but now I see that Greddy and HKS have bolt-ons too that are a little cheaper (maybe initially) idk...any input is appreciated, thx

 

Ultimately, a Turbo engine will make more power but an engine using a centrifugal supercharger will be superior in traction limited applications as there won't be any sudden jolt of power like a turbo engine is known to have! As for the Reliability thingie, both can be very reliable if tuned correctly and considering you're not going crazy on boost... I don't think a stock L15A1 will take 15Psi too long...

Marko!

 

There is no boost limit for *any* engine. Boost isn't even a universal measure for comparison across compressors let alone platforms. 15psi on a GT2554R is nothing like 15psi on a Rotrex C15 or 15psi on my 16G or 15psi on my S259 or 15psi on my HX35... etc.

Longevity depends on the tune and the owner. Run fat, low timing and fill the gap with boost. Use appropriate fuel and oil, and maintain that sucker.

This is a really complex question, but to keep it short and sweet:

If you want the sensation of speed, and the ability to change things later on, your best bet by a mile is to go turbo. Especially with the issues people are having with contacting Kraftwerks/Jackson Racing and lets not forget their complete abandonment of the Fit community...

Not only that but if you ever want to upgrade or even something as simple as turning up the boost your options with a turbo set up are nearly unlimited with a bit of research.

Merely turning up the boost on the S/C requires a whole new pulley, bigger injectors and since the KW Hondata tune is not end-user adjustable you have to have them send you the re-flash.

The only (meager, imho) advantage to the S/C is ease of install.

With the turbo among other advantages, you get the torque from spool and full boost coming on early and holding to redline, with maybe a slight taper off depending on the compressor/turbine combination.

With the Rotrex S/C you slowly pick up boost till it peaks near redline.

 

Thanks for all the feedback. Yeh the only thing really making me hesitant with the turbo route was all the extra moving pieces I'd have to acquire...like u said the s/c is a much quicker install... But I think u all made some good valid points and I think that turbo boost will be the best bang for the buck, thx again

 

Plus I like the flexibility of a turbo that I can adjust the boost for both power when i want power and fuel economy when i don't more or less boost... Rather a sc is 10psi all the time

 

Actually the SC in this case is only 10psi near redline. It has a curvilinear boost gain starting low in the rev range.

So you won't have nearly the peak torque or power under the curve you would see on a comparable turbo set up.

But yes, more complex system.

 

Personately, i like the way the power is delivered on a Centrifugal S\C system! Less potential power on the table but the fact that there is not a lot of boost on the lower revs can almost act as a traction control on a traction limited application...

Marko!

 

You can do boost by gear and have the best of both worlds.

 

Why not do your own build instead of the bolt on kit?