I have a few questions that may be a bit noobie...

I have been reading the forums a lot now, and was wondering why when it comes to FI, no one seems to supercharge!

Why is this?

Do you need to upgrade internals, ecu and various other things like you would with a turbo kit?

Thanks.

Kieran.

 

are you serious? a lot of preludes supercharge

look for JRSC or jackson racing supercharger

and yes......it would be optimal to upgrade other stuff just like turbo

 

most of the reason a lot of prelude owners dont, is because there is only one kit available.. and the HP is limited, with no intercooler option, and high intake temps, if you want high HP gains, u want turbo, if you want a lot of low end and fun, go SC.. it all depends on goals.. i was going to supercharge, but i am going turbo instead, because of the almost limitless potential.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AEMPrelude916 &raquo;</TD></TR><TR><TD CLASS="quote">if you want high HP gains, u want turbo, if you want a lot of low end and fun, go SC.. it all depends on goals.. i was going to supercharge, but i am going turbo instead, because of the almost limitless potential.</TD></TR></TABLE>Keep in mind though superchargers are belt driven, thus you get boost throughout the entire powerband. However, if my memory serves me correctly, superchargers also use some of the hp that the motor already is putting out to be able to turn the belt. In my mind Turbo&gt;Supercharger. Also I believe that you can piece a turbo kit together hella cheaper than you can get a sc. Not 100% sure though.

-Red

 

It does take power away from the motor but also adds it to provide power. The cost per HP is a bit more than a turbo and the boost is limited.

I think the main reason is that alot of people just want to be cool and do what everyone else is doing....you know, like what sheep do.

I prefer the JRSC as Honda's have no torque and that's what a JRSC provides as well as top end. Don't get me wrong though, there are alot of turbo's with little lag (Disco Potato) and provide a good amount of torque.

It's all depends on what you want out of your car.

 

Cause' they are slow

 

Parasites! Difficult to intercool except for centrifucal. Also they sound M@d TisYte Yo!

 

Wouldn't it also cause poorer gas mileage vs non-supercharged cars, since you're always powering the SC?

Maybe I'm wrong though

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Phil &raquo;</TD></TR><TR><TD CLASS="quote">Wouldn't it also cause poorer gas mileage vs non-supercharged cars, since you're always powering the SC?

Maybe I'm wrong though </TD></TR></TABLE>

That's a good question, but as long as you have good fuel management, I don't think so. Some boosted Honda's get better gas mileage than stock.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The Phil &raquo;</TD></TR><TR><TD CLASS="quote">Wouldn't it also cause poorer gas mileage vs non-supercharged cars, since you're always powering the SC?

Maybe I'm wrong though </TD></TR></TABLE>


some sc systems are like that so yes, you'll lose gas mileage. however, some are set up to shut off when throttle position is low enough. it works kind of like turbo when it "freewheels" so to speak. basically what happens is when the throttle is low enough, some sort of mechanical or electronic "valve" closes the path of air to the inlet s/c and reroutes it around the sc right back into outlet of the sc; basically skipping the sc. when u mash the throttle, the valve stays open letting the air go to the sc.

u won't lose gas mileage on that system unless you're always on the throttle.

btw, i think the old mr2's are setup this way.

 

I think some mercedes use a cycling clutch to do this also.

 

That goes for Roots-type SC's, Centrifugal SC's build up boost w/RPM's...like a turbo, just w/o the lag. I'm currently working w/ProCharger to come up w/a kit for my 4th gen w/an intercooler, but it's looking expensive so far. It will be a combination of their current kit for the Civic Si & 350Z, but, that's still in the works.

Shhhh....damn it, I said too much.

 

Wow Good Luck, keep us posted on the progress

 

i'd prefer the security of the tried and tested JRSC over a pieced together turbo kit even if it makes less power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by incubus &raquo;</TD></TR><TR><TD CLASS="quote">i'd prefer the security of the tried and tested JRSC over a pieced together turbo kit even if it makes less power.</TD></TR></TABLE>

the security depends on the hands of the tuner. a JRSC vs a turbo makes no difference, the control and reliability all has to do with tuning. Just because JRSC has a nice pretty kit for you to pay for makes it no more reliable than a turbo kit that I peice together.

secondly explain to me how blowing hot air from an inefficent root charger that is non intercooled is better than a non intercooler or intercooled turbo. Typicaly every turbo will be more efficent than a roots blower because of the way the air is actually being compressed which is Centrifugal.

without getting into a full blown super vs turbo discusion i think the limiting factor is money. the deciding factor should be the application. typically a roots blower is too inefficent for the higher rpms honda motors, Centrifugal blowers are too peaky for a high redline honda.

with the right tuning however no forced induction system is risky or safer than another. Though alot of people make bandwagon choices in a community like this, and i say good for the person that wants to go custom.

 

Where does the hot air come from?

Doesnt the s/c just bolt to the inlet mani and not have to handle exhaust like the turbo app would?

Also if i were to go s/c would internal engine mods be required? If so what needs to be done?

I guess if it gets hot then a hood scoop would help cool it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kizaa96prelude &raquo;</TD></TR><TR><TD CLASS="quote">Where does the hot air come from?

Doesnt the s/c just bolt to the inlet mani and not have to handle exhaust like the turbo app would?</TD></TR></TABLE>

Turbos don't blow hot air because they are stuck to the exhast manifold (although it probably doesn't help any)

When you compress air in a blower or turbo, it heats up. That's the basic principle at work here. The problem with the JRSC is that it does bolt right on to the IM, and there is no (easy) way to stuff an intercooler between it and the engine. What makes it even worse is the fact that roots-based chargers tend to be less efficient than centrifugal setups (which include turbos) this meaning they heat up the air even more, basically.

 

another reason...if your talking about a 4th gen setup, Its a pain in the *** to get a JRSC in there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by incubus &raquo;</TD></TR><TR><TD CLASS="quote">i'd prefer the security of the tried and tested JRSC over a pieced together turbo kit even if it makes less power.</TD></TR></TABLE>

that would only be due to the fact that you make poor choices....you can peice together a turbo kit for less money and make more power....if you want to talk tried and tested turbos have quite history....everything else in the "kit" is basic...

 

supercharger = no boost creep or whatever you call it. i always see threads about built motors blowing because they were running more boost than they thought if even for a short period of time.

 

Turbo...Because you get the cool blow off valve!