Vortech vs. JRSC >>>

which one is better for a daily driver ?? Which one is easier to install ?? Do they not produce the same amount of HP and TORQUE ?? I know I know newbie questions, sorry. [img]biggrin.gif[/img]

Really newbie questions.
See that button up top "Search" - it's magical !

Not too many people on here with Vortech, fwiw.
Vortech = belt spun turbocharger, the worst of both worlds , my opinion only.

I second your opinion on a Vortech blower Steven.

There is no comparisson at all. The power curves tell the whole story. a JRSC has a nice fat HP curve that makes good HP right from idle and lots of area under the torque curve. The Vortech curve looks like an alpine ski slope.

Since the vortech is a centrifical compressor it has to be spinning pretty fast before it makes any boost at all while the Eaton compressor moves a given ammount of air for every revolution (positive displacement) I think someone on this board put it best when they said "The Vortech has all of the negatives of a turbo combined with all of the negatives of a JRSC"

It sure looks cool under the hood but I would never use one on a small displacement engine.

Mike

Guess I will get the JRSC then if I get this GSR that I am looking at. Where is the best and cheapest place to get one. Also how much are they anyways. Also how long does it take to install ?? [img]biggrin.gif[/img]

I don't know. I might have to disagree somewhat. The site admin guy from Club si finally had some pretty good track results with his vortech.

He also seems to like it as a daily driver.

Compare his time of a *b16* in a civic to the recent crvtec times or b18 in a hatch with jrsc's.

thread here.

My question is: would it be a little easier on the engine because of a linear application (albeit alpine) of power rather than your average turbo?

Damn. . .that IS fast.

But for daily driveability, I'm putting my vote in for a JRSC. People who own a Vortech say that they're cars are just as driveable, but looking at the power figures proves that all their power is "up top," while JRSC cars have a nice flat torque curve in any rpm. Vortech owners also say that if they need the power, they can just downshift. . . well, who wants to downshift all the time when you can just step on the gas and GOOOO!

No, a JRSC isn't a turbo, and as such we don't have intercoolers or crazy timeslips. . . but then again, if we wanted a turbo, we would have purchased one. Personally, I got a JRSC because I didn't know that many people who owned one. Also, it's probably as stealth as you can get, which is always nice when you jump on an unsuspecting M3 or such. [img]smile.gif[/img]

yea that is fast...but i have heard of people w JRSC boosting around 10 psi makin anywhere from 230-240 whp...(270-280 crank)...running consistent 12.80s on slicks. Vortech ur boostin 13 psi (more strain), and getting a whopping 330 hp (not srue wheel or fly), but only managing a 12.85? don't get me wrong it is fast, but for that power and how much boost ur running it's not too great.

There is a TypeR here in my area that has modified the si vortech kit to fit his car. He is running 12psi. and is hondata tuned. The best time he has ever gotten out of his car is a 13.6 @ 106mph.

I am running half the boost.. 6psi baseline kit. No fuel management what so ever. My best time has been a 13.7 @ 104mph.

Give me 2 more psi and some fuel management(hondata) and our JRSCed cars will flat out walk on a vortech kit. Not only that, but he has had several problems with the setup and has in different time frames been out of a car for months. My car has never been down when it comes to the JRSC [img]wink.gif[/img] except the One and a half day it took to put it on.

Well, not to take anything away from the guy... I think that a 12.85 is fast. However, Tim (BoostedEX) ran a 8.20 @ 87 mph a week or so ago... which is faster !!!

Details: 245 wheel HP, 7.5 psi boost, CRVTEC with rods and pistons, NO intercooler.

He ran similiar 60' times, which means similiar "spinning" of those 22" slicks...

True, the car is probably 200 pounds lighter than a '99 Civic Si... but he has 85 LESS wheel HP.

The power under the curve is still what matters... so in this case, I guess it all comes down to what is most important: Winning a race or having the biggest dyno graph.

anyone in the Virginia Beach, Virginia area or near it that has a JRSC on their Intergra GSR that I can get a ride in to see how fast it is ??? Please let me know. Peace. [img]biggrin.gif[/img]

Yeah, I don't know about the reliability and all of the vortech. The jrsc certainly seems to be pretty reliable compared to anything else.

But see, I was also looking at it from the fact he's got that kit running 12s on a 1.6 engine. When one compares it to 1.8 and crvs with jrsc it doesn't look so bad from here.

I was wondering if it would be easier on an engine than a turbo, (which is the reason I might consider it over a turbo) but then if vortech owners are often slamming into lower gear (like someone said here) to get up on boost -- eh, that might offset that advantage. (cause I've downshifted to take advantage of higher rpm boost, and that seems pretty harsh on a engine running boost if you did it often enough)

To sum up everthing people are saying above. Without a doubt the JRSC (roots) is the more streetable option. The Paxton (centrifugal) is more for drag use only purposes due to the higher revs needed to make boost.

The Paxton will make only 2-3 PSI at cruising speeds (3500rpm), and will SLOWLY build up to its peak PSI (8-12psi)in the last one thousand RPM of its RPM band (usually right before redline or in redline). Where as the roots style (JRSC) will create 2-3PSI at idle, 5-6psi or 90% of its peak boost by 3500rpm and will hold it's peak PSI for the last 3000rpm of it's rev range.

So If you are comparing a 6psi roots to a 12psi centrifugal, they are making close to the same average HP through each gear (generally 3000rpm long 5000-8000rpm). The roots has the advantage at the bottom of the gear (2 vs. 6 psi at 5000rpm)and the centrifugal has the advantage at the top of the gear (6 vs. 10 psi at 8000rpm).

I would take roots over a centrifugal any day....

<font color="#a62a2a" size="1">[ November 07, 2002 01:12 PM: Message edited by: blownLS ]</font>