JC Sports Intake & acceleration

Fred · 01-12-2001, 07:28 PM

Hi, folks.

I did a search for similar problems to mine, but couldn't find anything, so here it is. Sorry if it's too long, but I wanted to give all of the details...

I just bought a 2001 Impreza RS Sedan on December 30th. Broke it in (now has ~1500mi), and started to work. Installed a JC 20mm rear sway bar, which made a HUGE difference. Also installed a JC intake, which has had absolutely no effect on acceleration whatsoever! I have a '94 Prelude 2.3 (2800lb curb wt.) which has been heavily modified and is running around 195hp, vs 160 stock. I want to get the Impreza up there, and thought the intake would help. I know how to drive a car, and I know how to time it. 1/4 mile speed is around 95 mph for the Prelude, and 87 for the Impreza. 0-60 is 6.7 sec for the Prelude, 8.2 sec for the Impreza. My times are consistent (of course the Prelude is hard to launch with fwd, so 0-60 varies), and I've done enough to have a decent population.

What's going on? 180 hp vs. 165 should be easy to measure with a straight road and a stopwatch. Anybody have any suggestions?

I really doubt I'll be returning the intake, regardless, due to the E-ville wail at full throttle!

Thanks for any help,

Fred

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GTBGUY · 01-12-2001, 08:46 PM

Try resetting your ECU.. that might do it

Fred · 01-12-2001, 08:59 PM

already tried it.

Fred

dandbest · 01-13-2001, 09:43 AM

Get Larry's intake or Cobb's intake. They are supposed to be a lot better. I personally have Larry's intake, and love it. As soon as I installed it, I felt a nice power increase. I think that is because it doesn't eliminate the black box, so it doesn't take away any of the low end torgue we all love, where as the JC intake does. Also Larrys goes into the fender for cold air, which helps, and JC's gets hot air from the engine bay, which doesn't help.

Hope this helps.
Danny

P.S. I also noticed that replacing the midpipe to a 2.25 diameter pipe and a decent muffler helps too. I have the Subaru Performance muffler and mid pipe.

munkis · 01-13-2001, 11:54 AM

LARRY! LARRY! LARRY! hehe his intake with the amsoil is great, I have the 2.5 inch version...but he now has 3 inchers boy they look sweat. check them out here www.imprezars.com

Anyway I used to have a jc intake for about 1000 miles...I didnt like it, because I lost to much low and torque, but you should feel a vast improvment in top end if you ride it to redline....and the sound is great, Larry's is not as loud but still nice.

Jay McDade
MY00 BRP RS Coupe
Auto Tech--Lincoln/Mercury/Jaguar

01-12-2001, 07:28 PM	#1
Fred Scooby Guru Member#: 3560 Join Date: Jan 2001 Chapter/Region: South East Location: Four Oaks, NC Vehicle: 06 STi, 98RS wagon 94 Open Light 2.5RS	JC Sports Intake & acceleration Hi, folks. I did a search for similar problems to mine, but couldn't find anything, so here it is. Sorry if it's too long, but I wanted to give all of the details... I just bought a 2001 Impreza RS Sedan on December 30th. Broke it in (now has ~1500mi), and started to work. Installed a JC 20mm rear sway bar, which made a HUGE difference. Also installed a JC intake, which has had absolutely no effect on acceleration whatsoever! I have a '94 Prelude 2.3 (2800lb curb wt.) which has been heavily modified and is running around 195hp, vs 160 stock. I want to get the Impreza up there, and thought the intake would help. I know how to drive a car, and I know how to time it. 1/4 mile speed is around 95 mph for the Prelude, and 87 for the Impreza. 0-60 is 6.7 sec for the Prelude, 8.2 sec for the Impreza. My times are consistent (of course the Prelude is hard to launch with fwd, so 0-60 varies), and I've done enough to have a decent population. What's going on? 180 hp vs. 165 should be easy to measure with a straight road and a stopwatch. Anybody have any suggestions? I really doubt I'll be returning the intake, regardless, due to the E-ville wail at full throttle! Thanks for any help, Fred * Registered users of the site do not see these ads.

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01-12-2001, 08:46 PM	#2
GTBGUY Scooby Specialist Member#: 2003 Join Date: Aug 2000 Location: Calgary, Alberta, Canada Vehicle: '99 BGP Legacy GT '98 QS Legacy L (auto)	Try resetting your ECU.. that might do it

01-12-2001, 08:59 PM	#3
Fred Scooby Guru Member#: 3560 Join Date: Jan 2001 Chapter/Region: South East Location: Four Oaks, NC Vehicle: 06 STi, 98RS wagon 94 Open Light 2.5RS	already tried it. Fred

01-13-2001, 09:43 AM	#4
dandbest Scooby Specialist Member#: 1885 Join Date: Jul 2000 Location: Bayside, NY Vehicle: 2002 WRX	Get Larry's intake or Cobb's intake. They are supposed to be a lot better. I personally have Larry's intake, and love it. As soon as I installed it, I felt a nice power increase. I think that is because it doesn't eliminate the black box, so it doesn't take away any of the low end torgue we all love, where as the JC intake does. Also Larrys goes into the fender for cold air, which helps, and JC's gets hot air from the engine bay, which doesn't help. Hope this helps. Danny P.S. I also noticed that replacing the midpipe to a 2.25 diameter pipe and a decent muffler helps too. I have the Subaru Performance muffler and mid pipe.

01-13-2001, 11:54 AM	#5
munkis Scooby Guru Member#: 1847 Join Date: Jul 2000 Chapter/Region: Tri-State Location: brokenmotorsports.com Vehicle: Team Broken: V6 GF rallyarmor.com	LARRY! LARRY! LARRY! hehe his intake with the amsoil is great, I have the 2.5 inch version...but he now has 3 inchers boy they look sweat. check them out here www.imprezars.com Anyway I used to have a jc intake for about 1000 miles...I didnt like it, because I lost to much low and torque, but you should feel a vast improvment in top end if you ride it to redline....and the sound is great, Larry's is not as loud but still nice. Jay McDade MY00 BRP RS Coupe Auto Tech--Lincoln/Mercury/Jaguar