Got everything finished up today. It didn't come together quite as smoothly as I would have liked, but it wasn't too bad considering what could have happened.

I spent 2 hours last sunday (3/23) installing the new PS lines and boost guage, 15 minutes Friday after work putting in Cold plugs and doing a compression test, 8 hours yesterday doing most of the install, and 3 hours today installing the intake piping, FMU, and trouble shooting.

After I got everything together this morning, we started it up! It sounded like a chainsaw! Needless to say not what I was expecting. Quickly I shut it down. Smoke came pouring up from around the SC.

I took the filter off the SC to see if the impeller blades were unhappy...they didn't appear to be.

Started the car again, and got the same sound, so shut it down. Got under the car and saw that the belt hopped of the alternator pully by 1 rib. Then noticed that the tension pully (a steel ASP one) had been scraped on the engine side.

I took the tension pully assembly apart and found that the entire inner side of the pully was torn up, and the tension rod was worn as well. I sanded the pully to remove burs, and started to play with the alignment. I ended up puting an 1/8" thick washer behind the spacer on the tension pully, and that did the trick!

Can runs great. 6psi with the 3.62" pully. About 68psi of fuel pressure. That seems a tad high, but I haven't been able to do many WOT runs just yet. Greddy BOV sounds great! It doesn't open until 20 in-hg of vaccum, so I may losen it a bit. I haven't played with it at all yet.

All in all, I'm thrilled! Install went well, and the car is a blast to drive!

I'll take pictures tomorrow after work.

 

congrats!

 

super!

 

Thanks guys! Here are my setup details...

• Brand New V2 Kit
• 3.6" (3.62") stock pulley
• Walbro Fuel Pump
• Sard FPR
• Stock FMU disc
• ASP pullies

I installed a Goodyear Gatorback as well before installing the SC. Just to be safe.

Questions...

The car seems to have trouble idling every once and a while. The RPM will drop to about 500 and the car will stumble for a second before the idle jumps back up. Is that normal? Does the ECU need to adjust?

My injectors seem a lot louder at idle than they did before. Maybe I'm just being paranoid.

What is the "stock" FMU disc size? 8:1? What FP should I be getting with the stock pully? My EGT's look good so I'm not worried, just wondering.

 

My car did the same thing until I changed the pcv valve. This may not be the problem in your case, but it is a cheap and easy item to replace.

 

I thought of that. Next time I'm doing something I may change it just to see if it helps.

 

My car would actually stall when I 1st installed the SC, I think the drag from the additional pullies is robbing the engine of power, and it stumbles when the idle reaches that low... I raised my idle ~150-200 RPM and problem went away and the car was completely driveable again.

 

Interesting. Hasn't stalled yet, just stumbled. If I notice it I just blip the throttle a tad. After installing the SC I let the car just idle for about 15 minutes, and noticed it stumble a lot...however since I've started driving it I haven't noticed it happen more than once.

I don't think its going to be a problem.

 

Welcome to the world of BOOST!

 

Is your belt tension o.k.?

 

Yeah, I left it a tad loose so it would get happy first. Haven't had any slips or squeaks yet. I'm going to keep checking it every other day or so until its where it "should be".

 

Congrats...sounds like my exact setup but I do not have the Gatorback belt...what is your idle Fuel Pressure...?

 

Same as before the install...34ish.

 

I was just asking because if the belt was ever so slightly slipping, wouldn't that affect the idle? I thought my belt was fine but after 6+ months, it hopped over a rib. So you never know. :I

 

I can't imagine it would effect idle. There's no pressure from the SC at idle (I read 18 in-hg vac.), so its not like the engine should need the SC to be running constantly to idle. I have a feeling delio's right and its just the extra strain on the engine.

I don't think the belt is slipping...feels nice and smooth when I boost.

I fully expect that I'll have belt problems at some time. I have a stock belt and an extra belt for the SC in my trunk along with a small tool kit. If I loose a belt I'll have to perform road-size sugery to get it going again! That's why I put the gatorback on...lots of people have good things to say about them.

 

It would have to be seriously loose to slip at idle. So loose that you wouldn't be able to build up any boost pressure at all.

 

I get full boost no problem.

Stillen uses the "90* twist" rule for belt tension. I did that at first, but had all kinds of problems with the tensioner...so when I re-installed everything I left it a tad looser until I knew everything was happy. I never tightened. I'd say I can twist the belt around 100-115 degrees. A little loose, but until I get it to complain, I'll leave it.

 

Okay, here's another question.

When driving around while at low-throttle and low-RPM, I notice that there's a deep humming sound right before the BOV opens. This only happens when I get to about 2500 RPM and let off abruptly.

It sounds like someone took the intake piping off the car, stuck the end to their mouth, and hummed for a second. Its strange. It only happens before the BOV opens, so I'm assuming they're related. Do I need to loosen it?

 

I get exactly the same sound, at the same rpm. At first I was really concerned about it being compressor surge, but after thinking about it came to the conclusion that it couldn't be since it only happens at low rpm, and at partial throttle when no real boost is being developed. It's pretty mysterious to me, but I think it may be just a Helmholtz type resonance (think organ pipe)at that particular rpm. I found it annoying as hell at first, but I've gotten used to it.

 

Thats basiclly what I figured. Seeing as it happens once the throttle plate is closed, it would change the accoustic properties of the pipe completely.

At least I'm not the only one!

 

Congrats!

 

Thanks.

 

CONGRATS!!!