Jackson Racing Supercharger Owners Thread

[CSG Mike]

Originally Posted by Lep897

All pulleys on the vehicle are either OEM or supplied via the JR kit. I am sitting on NST tensioner/idler pulley kit but haven't made the move to place them as I just wanna know why its happening before complicating the process.

I'll be looking over the bracket to make sure its flat once the new belt comes through shipping.

I know hitting the rev limiter is generally something you're not going to want to do but at the same time I shouldn't be terrified that bouncing it once will cause it to completely derail.

I'll update as soon as I begin pulling things apart. I'm thinking its most likely an issue keeping tension through the rpms.

Keep me posted please.

[Lep897]

Originally Posted by CSG Mike

Keep me posted please.

I just returned from my trip and finally got everything torn down and put back together. 2 things I noticed during all of this.

1: The ac compressor portion of the SC mounting stud was not 2 threads exposed in the back like it was during the initial install.

2: The idler pulley directly between the ac compressor pulley and crank pulley had back and forth movement or play if you will.

I got some more photos of it put back together now and there's a specific area I want to highlight that gives me concern. The alternator side of the belt has bias towards the front of the car. Something between the crank->tensioner->alternator side idler->alternator pulley is walking the belt to front of these pulleys along that portion.

[femaledog]

I have the JRSC c38 kit on my car. It's custom tuned on 93, makes good power on the dyno. However, on the racetrack, it performs poorly, and is basically keeping the exact pace with unboosted 86s (including my own previous unboosted data).

I've been all over the place with what the problem is. IATs are good. Coolant and oil temps are good. I am using the low boost pulley that was included in the kit, on stock injectors and fuel pump on 93.

The car makes like 280whp on the dyno (and you can really flog it on the dyno repeatably to that number), but once its out on track doing 4th and 5th gear pulls there just isn't anything there. It feels bizarrely stronger at lower RPM than high RPM where the boost should be helping me out with the MPH.

Anybody experience anything like this?

[JDMChris]

Originally Posted by femaledog

I have the JRSC c38 kit on my car. It's custom tuned on 93, makes good power on the dyno. However, on the racetrack, it performs poorly, and is basically keeping the exact pace with unboosted 86s (including my own previous unboosted data).

I've been all over the place with what the problem is. IATs are good. Coolant and oil temps are good. I am using the low boost pulley that was included in the kit, on stock injectors and fuel pump on 93.

The car makes like 280whp on the dyno (and you can really flog it on the dyno repeatably to that number), but once its out on track doing 4th and 5th gear pulls there just isn't anything there. It feels bizarrely stronger at lower RPM than high RPM where the boost should be helping me out with the MPH.

Anybody experience anything like this?

Nope. What oil cooler and what oil are you running?

[femaledog]

Originally Posted by JDMChris

Nope. What oil cooler and what oil are you running?

Jackson air (not the dual radiator oil cooler), oil temp is 240s, a few different oils, motul 300v 5w40, 10w40. Oil temperature is not running away, coolant temperature is not running away.

Driving TT pace and power is not good in the beginning of a session. Worse at the end. 3rd gear is good, 4th gear eh, 5th gear bad.

[tomm.brz]

you need to log
your tuner probably put some ignition timing reduction against temperatures

[tomm.brz]

you need to log
your tuner probably put some ignition timing reduction against temperatures

[femaledog]

Logs it is - I suspect the same thing. Temperature compensation table or something.

[BRZCR]

Hi guys. Few days ago I had a squeak on cold start and then would shut in like 5 min. I checked everything and we thought it could be the tensioner pulley. Today I was showing the engine bay to a friend, also today there wasn’t any squeak at cold start, and we find the belt like this. I haven’t checked everything yet because I’m at work, but has any of you have this issue?

Exit: didn’t give you any info lol. My car is a 17 BRZ MT with a JRSC C30 standard pulley. The kit was installed a week ago. Car has 36k miles.

[mrg666]

i have just hit 60K with JRSC which was installed (by me) in 2017 at 17K. I replaced the belt at 55K after 38K miles. It was my mistake that I was not paying attention when it started slipping a couple weeks before that. One day when I was driving home the belt started shredding but I could reach home with still 2-3 ribs left intact. I was really lucky. So, I will be changing the belt now every 30K or any time I hear it starts to make sounds. Replace your belts on time.

If the belt is shredding so early right after installation, it means either the compressor is not installed properly aligned, or the belt installed crossing the ribs. It is very critical that it is precisely aligned since this is a two sided belt. Double/triple check to make sure that compressor and belt installations are perfect.

[BRZCR]

Thank you, the belt was changed and we checked everything, the car has been running with no issues daily driven.

[BRZCR]

I have a couple of questions.

1) I keep reading hitting the limiter is very harsh for this supercharger, does this apply to the limiter set by the tuner for flat foot shifting? In other words, is flat foot shifting harsh for the supercharger?

2) Would a high boost pulley on a C30 be to much for a stock internals FA20? My car has verus AOS, JR oil cooler and water meth 50/50 injection on 91 pump gas. It did 279/217 on a dynojet.

[JDMChris]

Originally Posted by BRZCR

I have a couple of questions.

1) I keep reading hitting the limiter is very harsh for this supercharger, does this apply to the limiter set by the tuner for flat foot shifting? In other words, is flat foot shifting harsh for the supercharger?

2) Would a high boost pulley on a C30 be to much for a stock internals FA20? My car has verus AOS, JR oil cooler and water meth 50/50 injection on 91 pump gas. It did 279/217 on a dynojet.

Hard Rev Limiter is bad. Soft Rev Limiter is OK. High Boost Pulley is fine on Stock Internals, but is not worth it if you are going to stay on 91 You need to run 93 or E85.

[BRZCR]

Originally Posted by JDMChris

Hard Rev Limiter is bad. Soft Rev Limiter is OK. High Boost Pulley is fine on Stock Internals, but is not worth it if you are going to stay on 91 You need to run 93 or E85.

Shouldn’t my water/meth cover the gap between 91 and 93 octane? I know it isn’t the same, but I understand it adds knock resistance.