I want to know which is supposed to be better. I realize superchargers are powered differently than turbos, where supers are via a belt to the motor or motor of its own, and turbos are based from exhaust force to power them.... which is better? I still would like to go all motor on my car, but I am interested to understand which of these is more efficient, and why one would choose the other.

I want to know how each would effect the K20, i should have specified that one.

Anyone?

 

Supercharger: Instant boost, lower boost at higher RPMs, not as much engine heat.

Turbo: Lag, higher boost all the way up the powerband, more tunability, more engine heat, more parts required.

Id go with turbo myself. Just one mans opinion. I love the feel and surge of a turb'd car.

 

turbos are also cheaper, but like vtec/vvt its annoying as hell

 

I like the feel of Vtec, but it takes too long to get there... so a supercharge would be a better feel for me if i were to charge the engine?

 

think of a car u have driven in the past such as a cadillac or a truck of some sort., thats how a supercharger will be. lots of torque and power all the time. Turbo will drive just the same as it is now below about 3500-4000rpm or wherever your turbo is set to start spooling but once it spools its like triple time vtec for the feeling. Turbo are good for horsepower numbers and drag racing but superchargers are good for daily driving. If you are thinking of doing either to the new civic si, i would wait a year for alllll the testing to be complete. there isnt any turbo or supercharger out yet and the first ones will bound to have some bugs in them. also,....superchargers are cheaper,..not turbos. you are looking (by going off the previous rsx/civic si) 2500-4000,...the lower end of that price range being a supercharger and a complete turbo with intercooler and engine managment(k pro) being on the high end. Superchargers are also more reliable and less maint. than a turbo

 

your question can be better answered in the forced induction forum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pos_cd5 &raquo;</TD></TR><TR><TD CLASS="quote">your question can be better answered in the forced induction forum.</TD></TR></TABLE>

I think we handled it just fine. Made sense and was helpful. PLus the F/I forum probably doesnt know anything about the new Si's for the most part.

Helpful people,

 

yeah I asked in here because I wanted how it would effect the K20. I would definately need daily driver friendly... So if i ever decide to do forced induction, i suppose it will be supercharged. Thanks for the info guys.

 

I'd go the SC way if I had a k20 and didn't want to get too extreme. Can't beat torque for daily driving.

 

think about it this way.... your k20 in your si is high compression out the ***... if your not going to build the motor a supercharger with low psi against a turbo on low psi would kick its ***...

that granted is if you dont feel like rippin apart your motor n lowering your compression

if you do then turbo will be your choice

but for 6-8 psi on 12 compression i would go supercharger

just my opinion tho... if i had a brand new si i wouldnt want 2 rip apart the motor for turbo thats what b series is still for

 

6-8 psi on a 12:1 compression?...i personally wouldnt do it

 

i saw some tuner mag that had an article about a shop that turbo'd a bone-stock RSX-S with no problems. the shop even went so far as to say they were banking on the honda reliability. as for new stuff coming out, what's the big difference between the k20 in the si and the k20 in the type s? i know there's a lot less room in the si, and the si has electronic throttle, but isn't the motor essentially the same?!

 

Is the K20 in the type S the Z3? I'm not sure...?

 

na very different motors... head wise i think they are the same but block wise the si motor has a fully blueprinted and balanced crank i believe along with alot other things

 

my bad ballanced camshafts but theres a few things the si motor is much stronger tho the powerband is smoother maken it faster then the S if beat on right haha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Demonis &raquo;</TD></TR><TR><TD CLASS="quote">Is the K20 in the type S the Z3? I'm not sure...?</TD></TR></TABLE>

The K20 in the 05-06 Type S is the Z1, not the Z3. Z3 is what is in the new si.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GsrSiHatchie &raquo;</TD></TR><TR><TD CLASS="quote">.......but for 6-8 psi on 12 compression i would go supercharger.....</TD></TR></TABLE>

I am almost 100% sure that our motors are 11.0:1 compression, not 12.

Personally, I was going to go with a supercharger, but the more I thought about it, I wanted to go turbo. I just want to hear a damn BOV on my car.

 

I think you question was concerned with efficiency...what kind of efficiency? The most bang for your buck or what is most energy efficient for the engine? Thermodynamically, Turbos have a higher efficiency than a Supercharger. Honestly you really need to wait this one out for a little bit...nothing has been fully tested. I saw some guys Si with a Comptech Supercharger which looked pretty nice...and for daily driving...that would be pretty sweet. But if you want to race...I would be thinking Turbos and the Cam replacements in order to seek the high RPMs where all the power is hiding out waiting at your disposal.

 

I think I need to find out where I can get the most power out of, while keeping low stress on the motor, and retaining as much fuel efficiency for daily driving. Right now my future plans have ruled out turbo, but perhaps a built motor or supercharging would be better? I'm trying to learn something here.

 

and basic bolt-ons definitely won't cut it for you? the si is kinda quick right out of the box

 

I bet if you installed a supercharger you'd wet your pants in satisfaction. So just do that asap.

 

go test drive a saturn ion or cobalt ss to get a feel for it

 

if i did that..id have to sell my car. Not because I'd want an ion or a cobalt, but because the SI is just better. To me. Saturn and Chevy compacts can burn.

 

new si's have 11:1 compression, not 12.1:1. from what im told, u can go ahead and start building ur motor to an extent because i was told it is basically a tsx head and rsx bottom. so u can get basic parts (valve springs,retainers, etc) for a tsx and essentially they will work. i would not do this without doing alot more investigation and research. but the compression is in the packet at the dealership. with that high of compression though, i would go supercharged since u wont be able to safely boost the hell out of the turbo.

i dont know if this is an underlying part of ur question or not, but also keep in mind ur warranty. if u only have a 3 yr 36k warranty, wait a few years til they get all the bugs worked out of the new turbos or superchargers im sure everyone will start shitting out soon enough. maybe ssautochrome will be the first?! :D give it some time and watch 8thgencivic and here to see who has the money to get one first and check out the results they got. my $0.02

 

all 06 hondas have 3/36 bumper - bumper, and 5/60 powertrain.

 

I'm surprised no one has mentioned with the drive by wire system, like with the TSX a turbo is not possible at this time.