Rotex supercharger

12375 Views 24 Replies 16 Participants Last post by thunder2709, Jan 25, 2009

y0bfaelGS97

Discussion Starter · Oct 2, 2007

So recently i have decided im going to start putting some money back into my integra (some know the story, as up until recently ive hated the GSR I have owned, broken down many times, and some of my own dumb ass mistakes)

I considered turbo but after driving a few turbo tegs and other turbo cars (IE WRX's, EVOs, VW turbos, ect) and driving a supercharged civic si which I really liked, i have decided i might move into the supercharger realm (its the turbo lag thing and i really like the throttle response of NA but want the FI power at the same time).

The one thing i dont really like is the gear whine, its cool on V8s but us 4 bangers and me not really liking the sound on imports has brought me to this question. (plus me not having a garage for my teg as i live in apartment i want to keep it as sleeper as possible).

Ive heard and read jackson racing will be using Rotex superchargers on new hondas but havent seen anything on us old schooler B-series guys. I know HKS has a kit for some nissans but i seriously havent found ANYTHING for the 90s hondas other than a video of the Type R in the UK with on.

I hear prochargers are fairly silent till after some time, i mean come on, if you think about it all gears whine when you spin them that fast.

All i am really asking for after searching for a few nights, does anyone know for a fact if we will get a bolt on kit featuring the amazing rotex supercharger, or are going to be lost in the past?

any info would be appreciated ive done a turbo B18C1 that hit 500 WHP but i want to see what i can do with a rotex on a street driven, non raced, more for fun daily driver, and yes an engine rebuild will be done with this, nothing crazy, just a rebuild kuz well it will need it.

for those who are wondering, the build will consist of stock bore, 9.0:1 or 9.5:1 compression ratio pistons, rods to match, stock GSR cams, cam gears, upgrading the rest of the valve train(to be decided at the moment), appropriate head gasket and head studs. of course tunning and everything needed (I do know what they are) to make it reliable, my goals are more for fun than anything else so HP goals are not what i am going for 250 ish will more than satisfy my needs.

this build will be after a much needed front end rebuild (bent H beam, inner and outer tie rods, LCAs and bushings).

thanks for reading and thanks in advance

Rob

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98_gsr

· #2 · Oct 2, 2007

ive been doing the same research and so far ive found nothing about a rotrex supercharger kit for the honda b series motors. from looking on rotrex's website it looks as if they are only releasing the kit for the K series and for the fit/jazz. Ive also looked on the jackson racing website and it looks as if there were to be anything for the b series it would have to be custom fabricated. i was really intrigued by that UK type r with it on too it said well over 300hp!!

JRutski

· #3 · Oct 2, 2007

y0bfaelGS97 on Oct/02/07 said:
I considered turbo but after driving a few turbo tegs and other turbo cars (IE WRX's, EVOs, VW turbos, ect) and driving a supercharged civic si which I really liked, i have decided i might move into the supercharger realm (its the turbo lag thing and i really like the throttle response of NA but want the FI power at the same time).

Rob- not to dissuade you from using an SC to create boost as you do have a valid argument, let me pose some other questions etc.

-Whether you go supercharger or turbocharger, if you want the immediate off idle response of the JRSC kit, you will be limited to a small blower or a small turbo. There is simply no way to make HUGE amounts of power AND have great off idle response...at least not from anything < 2.1L.

-Have you ridden/driven a honda with a smaller turbo- such as a gt28rs or even a straight t3 (t3 super60)? While these turbos cannot handle more than about 400 and 300 WHP respectively, there is NO spool lag time to speak of. Take this dyno for example:

A stock block GSR on 8.5psi making no less than 150 lb/ft of torque after about 2500 rpm...and there's plenty of more flow on that turbo.

Compare that to this (stock GSR with JRSC, 9 psi pulley)

If you look at the RPM range, the JRSC kit makes 175 ft/lb of torque at the same RPM as the turbo setup. And with the blower, you have crazy high IATs. Now I know you're talking about the Rotrex SC which is a centrifugal type rather than a roots type...but from what I have heard, the vortech unit does not "spool" and give anywhere near the off-idle response that the JRSC does. Why would you mess around with all the custom fabbing etc and the parasitic loss when there are tons of turbo parts that bolt right on?

You really need to think about EXACTLY what kind of torque curve you are looking for. I guarantee, what ever it is, a turbo can MORE than satisfy your needs...but if you do want to go the SC (Centrifugal) route, go ahead. We need a good "compare to" thread.

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FlatRate

· #4 · Oct 2, 2007

Rotrex will whine just as well. Fine the old video in the FI forum... I'm almost positive it whine just like a roots blower.

BTW, previous threads. I'm almost positive there was also another thread on JR and a discussion on a B-series kit. Which was most likely not gonna happen. Too old of a market to make money off from IMO and theirs.

y0bfaelGS97

Discussion Starter · #5 · Oct 3, 2007

thanks for the links FlatRat, for some reason when i searched nothing came up, typo probably.

JRutski

"-Have you ridden/driven a honda with a smaller turbo- such as a gt28rs or even a straight t3 (t3 super60)? While these turbos cannot handle more than about 400 and 300 WHP respectively, there is NO spool lag time to speak of. "

Unfortunately i haven't, i don't really stick around the honda scene around here and driving the SC civic SI was because of work.

JRutski

· #6 · Oct 3, 2007

Well....either way, as you can see from the dyno comparison, a smaller turbo can have the response of a JRSC without the terrible IATs. And as said before, the centrifugal SCs just don't have the response of a JRSC or a small turbo and only make peak numbers with a terrible powerband (useless).

MrMoe

· #7 · Oct 3, 2007

JRutski on Oct/03/07 said:
Well....either way, as you can see from the dyno comparison, a smaller turbo can have the response of a JRSC without the terrible IATs. And as said before, the centrifugal SCs just don't have the response of a JRSC or a small turbo and only make peak numbers with a terrible powerband (useless).

Could not have said it better myself.

mrmad

· #8 · Oct 3, 2007

According to Rotrex, the way the turbine is driven gives it better response then a normal centrifugal SC. How effective this is remains to be seen.

94carbonteg

· #9 · Mar 26, 2008

any new news about this supercharger, the website didn't look updated at all from when this was posted. jackson racing only has a titanium header and this rotex prototype. i wasn't sure if anyone has tried to fab something up , or considered it more yet

davey4320

· #10 · Mar 26, 2008

well if you do decide to go supercharger with the jrsc i would suggest you keep stock compression. You will have to boost a lot more just to put up decent numbers due to power lost from lowering your compression. (just a thought)

Pickleteg

· #11 · Mar 26, 2008

Yup..don't lower compression with a JRSC....10:1 is a good place to start

covert0204

· #12 · Jan 22, 2009

Hello,
I know this posting comes a little late but I just started researching turbos and superchargers myself regarding. I found a kit from Vortech that yields 240 using 7psi and 290 using 9psi. This is engine horse with all stock equipment on a B18C1. What is helpful about this kit is that it uses hardware to control the increased fuel flow. An upgraded computer and tuning is not necessary. In addition the upgraded computer means you have to move to an OBD1 harness. This means you cant have your emissions checked if your car is older then a 94. Given there are some down sides to this hardware over software application it simplifies things. I for one am not one who wants Pandora’s Box to be open regarding reliability. Since hardware controls it all they actually provide a reasonable warranty on the hardware.

Check out the kit at: http://www.vortechsuperchargers.com/product.php?p=121..

If all goes well I will most likely have one of these kits installed. This seems like a solid no nonsense kit for those who want more power without headache. Let me know what you think.

edit: Please use the link function, and break up your paragraph for easier reading. - codenamezero

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Danny50

· #13 · Jan 24, 2009

There is no such thing as power without headache. You are drastically oversimplifying things

And good luck with the garbage FMU that comes with the kit. There is no substitute for a real EMS

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97lsteggy

· #14 · Jan 24, 2009

^ That actaully looks like a really good kit it you wanna go that route. For the money you could build a more powerful turbo setup but if you want just a super charger kit that's the one i would buy. However, I agree with Danny, tuning it would make it more reliable and you'd most likely see an even bigger increase in power.

Danny50

· #15 · Jan 24, 2009

Yup. It really depends what you are going to use the car for. 99% of the time, a Turbo will be the best way to rto get you to your goals, and if you size it properly, you will retain decent throttle response. The people who go on endlessly about the drawbacks of Turbo lag have never driven a GT28RS powered car.

Big_Mac88

· #16 · Jan 24, 2009

I have been doing a lot of research on SC myself. If you are dead-set on supercharging and you want throttle response, JRSC all the way. from what I've seen, centrifugal superchargers are really only advantageous on muscle cars or cars that are built for top end speed. Correct me if I'm wrong lol

Danny50

· #17 · Jan 24, 2009

Not really.

It is an extra pulley, connected to a very long shaft. This shaft spins a compressor wheel exactly like that of a turbo. This is beneficial because of significantly lower IATs, especially since the charge piping design allows for the use of an intercooler.

The throttle response from the JRSC would in theory be a bit better, but this kit would perform better at the same boost levels.

97lsteggy

· #18 · Jan 24, 2009

Danny's right. Besides look at some JRSC dyno graphs. they're nothing special imo.

Danny50

· #19 · Jan 24, 2009

Think of this kit as a middle ground between a typical roots type SC and a turbocharger.

05_DC5_TypeS

· #20 · Jan 24, 2009

Rotrex supercharged type-r 375+whp

http://www.youtube.com/watch?v=N-6fWeKT3h0

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