Lack Luster JRSC Install

[5 Liter Eater]

I installed my JRSC this weekend and I am not terribly impressed. It doesn't act like what I have read. The boost reacts slowly like a turbo. When I goose it in neutral the vacuum barely jumps up to 15"Hg. When I get on it on the street it acts like a turbo with the boost gauge slowly climbing out of vacuum and into boost to about 7 PSI, but I don't get there vey fast. From the time I drop the hammer it takes about 2-3 seconds to reach full boost!

Here is the setup:
-'94 GSR w/ 95k on the odometer, runs great
-stock intake and exhaust
-Used JRSC @ 6 PSI (looked to be in great shape)
-Cartech w/ check valve but no restrictor.
I had a GS 342 but the idle FP was 50 and the static @ 60 so I elected to take it out and put the stocker back in temporarily which gives FPs of 42 vac and 52 static with the static setting on the cartech set at 50. I have played with the bleeder but it doesn't make too much of a difference.

Should the boost come on instantaneously? I have heard about guys seeing boost when goosing the throttle in neutral and I can't even get to 10"Hg. This doesn't seem right. I have heard about "Instant boost" and that's not what I am seeing.

Could it be that the belt isn't tight enough and the SC is not turning fast enough? There is absolutely no squealing and I am almost positive I have the belts on right although the SC belt was longer than the JR instructions mentioned and the tensioner is at it's limit. The belt seems very tight though.

Please offer any suggestions as I am pretty disheartened about the install.



------------------
Bill Winters
Houston, TX
'94 bone stock GSR w/ home made CAI (Soon to be JRSC'ed)

[randomwalk101]

Bill,
i'm not very mechanically inclined so I really don't know what you did wrong. Perhaps others can shed some light on this...but we have the same car/set up (for now at least). It's a 95 GSR w/ about the same milage as yours...boost came on very much instantly...if u want, you can test drive my car for comparision purposes since we virtually right next to each other..let me know...my car doesn't make that much power anymore (I think) since I was only hit 14's...it's either I have terrible tires/bad driving tech. or low compression...I need to do a compression check...I'm hoping it's the tire though

[Petie]

Getting a dyno run is probably the quickest way to check out the integrity of the blower itself. I have a bone stock 95 GSR except for the blower and a JR BTC and my whp went from 138 to 195. If you're not running the Boost Timing Controller, this may account for some of the throttle sluggishness you are feeling tince that box is primarily designed to help with drivability issues (and it also helps with emissions).

[Petie]

Getting a dyno run is probably the quickest way to check out the integrity of the blower itself. I have a bone stock 95 GSR except for the blower and a JR BTC and my whp went from 138 to 195. If you're not running the Boost Timing Controller, this may account for some of the throttle sluggishness you are feeling tince that box is primarily designed to help with drivability issues (and it also helps with emissions).

[lundgren]

Slipping Belts?

[AMslp_late]

Don't take this wrong cause I love the JRSC..I even own one.
But your expectations might be a little too high....or you really could have a problem or...
Are you letting it completely warm up before you hit it??? That will definitly make a difference in performance. Your engine will not switch over to the bigger cam lobes untill it's good and ready.
You probably know that already tho.

Just a thought,
Austin

[strng1dah]

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by AMslp_late:
Don't take this wrong cause I love the JRSC..I even own one.
But your expectations might be a little too high<HR></BLOCKQUOTE>

They might be slightly overinflated, but it should not take that long at all to reach full boost. Not nearly that long.

[5 Liter Eater]

Thanks for everyone's input. I talked to JRCivic and he also pointed out the possible belt slippage and to check for leaks and properation of the bypass valve. I changed the belts as the ones that came with the kit were strected the outer limits of the tensioners and the boost gauge still was really sluggish. Then it dawned on me that the gauge could be lying so I attached the vacuum source for it to the TB where I knew vacuum was working properly because I could see the actuating arm for the bypass working fine. The gauge still read little to no change when rapping the throttle in neutral. Then I pulled out some of the nylon hose that I pushed back into the firewall earlier in the install and.....you probably already guessed...

It was kinked!

Once straightening the kink the gauge reads exactly how everyone else says theirs does. It jumps quickly to the 3-5 PSI range and then back down when revving in neutral. So the supercharger works fine, which is good because I was starting to get a little worried. Realize that fixing the gauge makes no difference in performance, just perceived performance. It's amazing how much looking at the gauges can alter your perception. With the gauge fixed it actually feels faster!

Anyway, I think AMslp_late is right, I was just expecting too much. Sure it's faster but it isn't the tire smoking, neck snapping, cheek wrinkling power I was expecting. When I turbocharged my old Civic EX it FELT faster, but it couldn't have been. I bet the 'teg was as fast or faster when it was stock than my turbo Civic. The car runs well with little or no tip in @ 10 deg. and 2-4 green bars in the A/F gauge with 42/52/?? fuel pressures.

I realize that I can still do some fine tuning but I think the ENDYN stepper and RC 310's that came with the kit are coming out of the box a little earlier than I had hoped. I will be getting a B&M Commandflo from Jim in the very near future so I can do the TOO mod and lower my FP enough to run the 310's and install the stepper pully.

Random, I would really like to take rides in each other's cars to compare! Give me a call @ 713-303-3298 and we'll arrange a time and place to meet. I'm in the Pearland area.

I feel bad for wasting everyone's time, especially Jim, who took 15-20 minutes off from an SI JRSC install to help me troubleshoot my phantom "problem".

Thanks again for all the input. I'm sure I will have some more questions in the near future.


------------------
Bill Winters
Houston, TX
'94 bone stock GSR w/ home made CAI (Soon to be JRSC'ed)

[This message has been edited by 5 Liter Eater (edited August 06, 2001).]

[waveoff]

Bill, you may want to change your sig. It still says (Soon to be JRSC'ed). Welcome back to the darkside.

------------------
Fred G.
'97 Civic EX supercharged http://www.geocities.com/motorcity/track/4059
Beech 1900D driver...2,558 shp, 10,000+ ft./lbs. tq., top speed 331 mph

[Holden]

I toasted one of those hard vacuum lines too when I put my boost gauge in.

Put the stepper pulley on after everythings tested out. I know the time I stepped my car down from 10psi back to 6psi, 6psi felt pathetic!

There's plenty more power to be had.

------------------
Greg Holden
96 GSR, JSRC @10psi, All the Goodies!
Best 1/4 ==&gt; 13.937 @ 101.41mph (at 6psi)
My JRSC Install Site