Anyone know if AEM or any other brand of CAI's make a 3" diameter pipe rather than the 2.5"? It just seems that 2.5" would be a bit restrictive for the use of a JRSC making 9 to 10 lbs of boost.

 

the Type-R is 3" I think, all the AEM CAI need to be cut to be modded to fit the JRSC setups I believe.

 

I'm about to install the SC & I talked to a couple of tuners that both say different things about the 2.5" CAI vs. the 3" short ram. One says the 2.5" CAI would work better & the other says the 3" short ram works best on the SC set up. Just trying to make a right choice before I finish the job. Thanks for the input.

 

A JRSC needs as much air as possible, the easiest way possible (the least restrictions). My guess it that the 3" certainly wouldn't hurt, and might even help.

As a sidenote, I remember reading an article that voted the Comptech ICEBOX as by far the best intake for the JRSC.

 

I think most people recommend the 3" filter on a stick for the JRSC.

 

DO NOT use a CAI, use a short ram... the longer intake will act like a vacume and make the charger work harder...

so use a short ram intake!

Tyler

 

I disagree on this to an extent. The short ram is pulling air that has just passed the radiator. My intake temps were about 10-25 degrees(depending on day+ how long the car was running) lower when I had a CAI. I didn't make the effort to dyno before and after, so I can't make any power claims.

 

can anyone 2nd the icebox as being the best to use on a JRSC? where was this article? what other brands/types were tested??
i once saw an article sayin stock header was better for the charger as well (this was years ago)

 

Just for being curious, does the CAI for a GSR fit well when SC is installed?

 

from 3 cars here that have(had) jackson's chargers on them, that went to get tuned by oscar jackson himself...

short ram is the way to go...

the CAI causes to much turbulance they say.

 

If I could dyno both back to back I'd be alot more convinced. Here in Alabama in the summer I don't see how a short ram intake would benefit. It get pretty dang hot & humid here & seems that I'd need as much cooler air as possible. But thanks for the info on the shorty.

 

I have a 1997 JRSC GSR boosted to 10 psi, and Doug at Hondata told me he saw a 15Hp improvement when testing with a 3-inch AEM intake versus a 2.5-inch.

 

Dougs a hella cool guy...its pretty sweet what they did with the k-series....for me im still saving pennies to get my charger n hondata

 

I did a ton of testing (and datalogging) with a lot of intakes, and can honestly say that the fattest SRI you can use is the best (short of a new intake box). The jrsc loves big inlets, which is why a bored TB can net you a few whp along the whole rpm range, and my 3" Iceman made more power than a 2.5" AEM intake. I also tried different filters, and the best one I found was a K&N cone, 12" in length, with a diameter of 6". That thing was huge, but let in a TON of air.

The CAI attachment actually "added" another psi of false boost on my guage, because of the fact that it had to work so hard to get the air moving. Throttle response was slower, although my datalogs confirmed that the intake temps were 10-15 deg less than the SRI.

Bottom line?
A Cold Airbox like the Comptech would allow cold air to enter, while maintaining the short length intake tube that the jrsc loves, thus making the best power, at a higher cost than most CAI or SRI systems.

FYI, no tube and filter makes for awesome throttle response, but tends to beat the hell out of the coating on the internal fins of the jrsc.

 

Ihave a supercharged si and it has a 2.5 inch aem. Im tossing around the idea of a 3 inch short ram intake with velocity stack from a turboed car. Sounds dumb but ive seen improvements

 

I found this in my "notes"...

This is what Jackson Racing told me about the cold air intake:
The supercharger produces high intake air temperatures because the blower itself gets hot from working. Most cold air intakes have about a 3 foot tube length with at least 2 bends. That places more load on the blower, causing it to run hotter, negating the fact that the air was colder at the filter. A short ram intake will breathe in warm air, but has a tube that is half the length with only one bend. You really aren't losing power with either of these setups, but you aren't making any either. Case in point: if you don't yet have a CAI or short ram, don't buy one, but if you have one installed, don't feel like you have to throw it away.

 

very informative post i'm glad i kept my short ram, although its only 2.5"...