JR sux IMO, they only want to make SCs for Honda Civic's and other sport compacts

Accord V6 owners were also pushing them to make an SC and they gave the same response of not enough volume to justify R&D costs. But in the end Comptech came through and at least came out with something.

 

Jackson sucks for saying that. How come Comptech and Vortech seem to be doing so good? If Jackson came out with a roots style blower, I think it would take over the S2K supercharger market if it was similarly priced.


BTW, I heard some German company make a roots style for the S. Has anybody heard this or has this just been taken around the rumor block too many times?

 

Jackson racing makes kits for many small market cars. An example would be the Ford Focus SVT. Only about 4000 SVT's were made a year from 02 to 04 and they produce a kit for that car. The put out nice power for the price and can be upgraded. They do a lot more R&D on what a specific motor can sustain on stock internals and still have excellent reliability. Ford Racing will warranty an engine with a Jackson Racing charger as a result Many kit manufacters don't care if the engine will only last 5000 miles as long as they can show good numbers and price.

 

Interestingly they make a supercharger kit for the miata and even a big boost kit for that kit. Maybe they think are car is fast enough.

 

Well that took about 3 secs to find with the search function:

https://www.s2ki.com/forums/index.php?showt...193232&hl=ogura

For those not familiar with the search function:

http://www.trials-shack.co.uk/posting.html

 

I am curious to hear some reasoning why so many of you think a roots style, ie: Jackson Racing, supercharger would be so great on a S2000.
Honda engines, largely in part to the fact they have a 9000 rpm redline, are not going to like the additional heat that the 'roots' blower is going to add. The main power band is from 5-6000 up to 9000, usually. I know several people running JRSC's on civic, and plenty with a Vortech kit, hands down the Vortech is a nicer setup, especially if you want reliability. Not to mention one with an aftercooler. Honda motors love that colder air.
Put it this way, I've seen a Civic Si with a JRSC run mid 14's on drag radials at the track. And then watch a Vortech Si run a 13.8 and back it up with a 13.9, on street tires. Both cars were very similar, the Vortech even had a stock exhaust still.

I can't see a roots style blower outperforming a centrifugal type blower on a S2000, especially when you factor in the aftercooler option available. Which, without some kind of custom crazy style blower, you're not going to get with a roots.

But hey, that's just my opinion on how to build a 'reliable' and FUN, blown f20c.

 

A twin screw blower is more efficient than a centfugal blower, hence less heat.

A twin screw blower produces considerable boost at low rpm, hence more low and mid-range power than a centrifugal blower.

2 big reasons why I'd rather have a twin screw than a centrifugal blower.

In BMW apps, a twin screw blower running identical boost blew away the AA turbo kit in terms of area under the curve.

Twin screw is the only way to go when it comes to supercharging.

 

The search button has never been friendly to me when it does work. I put in supercharger along with roots and didn't turn up much and I didn't know about Ogura so I couldn't get the result you had

BTW, I like that posting instruction video.

While we have this new thread going, is the Ogura blower on that S in the other thread custom fabbed onto the S or is it an actual piece they make for the S and if so, has anyone tried to import it?

 

it makes less heat? First time I have heard that one. even most domestic guru's i have spoken with hate the high heating factor of the roots style blower. The colder the air, the more power you are going to make. Thus why NO2 is so effective.
Not only does it produce quite a bit of heat while spinning and heats the air, it has a lot of heat soak from the head as well. And you have no way to cool this air before it's crammed into your cylinders. Don't forget, we're talking on a high rpm engine that already produces substantial amounts of heat. I can see on a lower rpm engine with high displacement, it's not going to care about the heated air as much, again, honda engines love cooler air, and really have a tendency to fail under extreme temperatures. not to mention larger displacement engines can disperse the heat a lot quicker, or at least they should.

yes it does create more boost down low, but honda's are not a low rpm torque engine. Get over it. If you want something with a lot of torque down low, you need something with a bit more displacement than 2.0L.

Although I am curious to see a few roots setups to compare numbers, i just wouldn't put one on a daily driven, high revving engine. Not the smartest choice for a blower imo on a honda engine. Especially considering the problems I have heard and read about with people running them on b series engines. Where people with a centrifugal have had little to no actual engine problems, mainly just with the kit itself.

Just my $0.02.

 

Well, I'm going to have to chime in here.

Honda engines hate heat, and a roots 'blower' will produce the most amount of heat out of all types of superchargers. I have seen intake air temps in excess of 200*F on Jackson equipped civics. Hondas are very fragile when in comes to hot intake charges. Why do you think water/alcohol injection is so popular with racers using a Jackson (roots) superchargers?

A roots blower will make the most heat out of all the possible superchargers in production right now... while a centrifugal will heat the intake charge the least amount. Coming in a close second with the least amount of heat is a turbo, which is a supercharger by definition...

A centrifugal compressor is also much easier to intercool, another way to chill the intake temps even more. I have yet to see an efficient intercooler on a roots blower for a honda. And the popular way to intercool the centrifugal compressors is air to water, so I ask how are you going to produce intake temps lower than ambient with a roots blower?




A twin screw will produce slightly less heat than a roots, but with both types you are very limited on your intercooling options, especially on honda's.


Everybody says they want torque, you need to keep in mind you are only dealing with 2 liters of displacement... the potential for torque is very limited, especially in the lower rpms, this is why honda's are raced in the upper rpms. I usually tell people that you have to drive a honda 'race' car like you would a Honda motorcycle, rev.. rev.. rev...

If you want to debate 'area under the curve', why are we even talking about supercharges and not turbos???

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