Does anyone have a JR SC installed?
 

I have found the JR Supercharger online and it puts "285whp" according to their dyno with stock header and exhaust.
https://jacksonracing.com/jr-media/u..._stock_web.jpg

Does anyone have one installed that can tell me if this is right or not?

285 whp with everything else stock seems doubtful from what I've been reading... honestly i haven't seem much compared to kits like vortech, AVO, and innovate...

Yeah I am really really doubtful, but it would be nice. I was really hoping that someone had one installed and could say. It looks like a nice kit though.

Paging @sklimo and @PrimeMotoring

Looks like they got 264hp with aftermarket headers. My guess is sklimo's tune is more conservative than Jackson Racing's tune. Nothing a new pulley can't fix probably.

http://www.ft86club.com/forums/showp...&postcount=184

You rang?? LOL

Yeah 264 to the wheel with stock injectors and pump.

I have one. Haven't dynoed though. My butt tells me 240-250 HP range though

I have the KW supercharger which is nearly the same thing...these put out 275 on the basemap which is not that far off from the target. 10whp isn't much of a variance :)

Mine was dyno'd on Mustang dyno. Maybe dyno in first post is on dynojet??

Like I said, 10-20hp can easily be attributed to a different dyno. In any case, both kits have the potential for massive top end :)


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Keep in mind, these numbers are on a hub dyno, which can read higher than a roller type (Dynojet, Mustang, DD, etc.)

We do. That dyno is accurate.

Don't focus on the absolute numbers. Focus on the % gain.

48.96% gain ((282.7-186.5)/186.5)

There you have it :)


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Attachment 66855



Here's mine

Low reading Mustang dyno here compared to a hub dyno.

The important thing to take away from that dyno plot is the 96 whp and 66 ft-lb delta between the stock dyno and the JR dyno. I can tell by the fact that the stock dyno was 186 whp that this is a very high reading dyno

It is not on a Dynojet, it is on a Dynapack which is a hub dyno.

They can read higher OR lower depending.

Depends on how you define accurate. I would trust those % gain numbers, yes.

Hard to say without knowing more about the Mustang dyno's settings. They can definitely be configured to supply Dynojet equivalent numbers. I will agree that the Dynapack does seem to be reading high only showing a 7% drivetrain loss.

The percentage gain is more important than the actual numbers. Every dyno will output a different value based on their particular calibration.

those are some pretty impressive gains for a centrifugal sc on a mustang. about what my turbo puts out @ 8psi. rotrex is where it's at if that's the route you want to go.

Why does the FI forum have so few stickies?

OP, these should probably be stickied, and will be a good resource for you:

Forced Induction Buyer's Guide

Supercharger Comparisons

Supercharger/Turbocharger Dyno Thread

Didn't we agree that this is a dynapack? Why is everyone saying mustang?


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@sklimo's dyno at Prime Motoring was on a Mustang dyno and was used as a comparison since he has the JR kit as well.

Was it the same tune as well? Again, not that any of this is outside the scope of dyno to dyno differences


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No I got custom tune

any dyno can be adjusted to say whatever you want. our settings are default mustang settings and we have had a few unhappy customers with the numbers it has provided.

We have another customer doing a JR kit soon with stock fueling and stock exhaust with their tuning. Once finished we will be dynoing the car and can compare the difference between his and @sklimo 's car. that should clear the air. same dyno in a climate controlled room. bone stock car with JR tune vs full exhaust and our tune.

Have you considered giving them Dynojet equivalent numbers then? Find a local Dynojet and get a correction factor. That was what I was going to do when I nearly opened up my own shop based around a Mustang AWD-500 dyno.

two closest dynojets are about an hour south and east of us that i know of. someone would have to be willing to make the trips.

Maybe when we put JR oil cooler in and other shit we take a ride???

there might be a dyno jet up by you though. CT has a few shops with dynojets

True, but I'll be there anyway lol. Plus I know and trust you guys.

No reason to make a mustang wrong on purpose. Anyone who cares about the number should just go use a dynojet and make themselves happy. Keep the mustangs honest lol.

We have dynojet numbers too. Not same day, but same dyno.

https://scontent-a-lax.xx.fbcdn.net/...85657793_o.jpg

I am implying providing the original Mustang dyno numbers and then Dynojet equivalent numbers on a different plot. Give the customer what they want, and if they want to brag about being able to make 300 whp on a Dynojet, then let them brag.

So 70 whp and 40 ft-lbs of torque gained on a Dynojet. I love me some EAS by the way.

We'll be doing some further dynoing with race gas, but an otherwise untouched setup. A little birdie tells me to expect a substantial power increase, since the ECU and calibration will recognize the superior fuel....

What is EAS?

What about reliability? Has anyone had a JR SC for an extended amount of time?

Its still relatively new. Ask in a year :)

Not sure for "massive" top end with stock fueling...

That was a Dynapack. And Dynojets don't read high, just justifications some use to quantify their work to their customers IMHO.

That is correct, and dependent on calibration and gearing settings...

So to quantify and recap :

JRSC : http://www.ft86club.com/forums/showt...t=52992&page=3

KWSC : http://www.ft86club.com/forums/showthread.php?t=53538

So I pulled some of the charts off.. this is what the head to head looks like -

Attachment 66910

Same SC unit, about the same boost (there will be variance because it's belt driven) and an edge goes to the JRSC kit since that project has a HKS EL header. Both kits just came out in Dec, and AFAIK, these were in the first batch of each of the respective companies that were posted...

Now when you take the top SC performer with a header and compare that to an AVO setup at the same boost...

Attachment 66911

"All things equal, pound for pound of boost, a SC won't outperform a TC."

My 2 cents.


Bob @ Drift-Office, LLC

Oooh. Bear in mind we have cooler ambient temps and run 92 Octane compared to some of the others who run 91 and are in warmer climates...


Bob

Completely jealous of the fact that you are blessed with 92 Octane in your area. What is a californian to do? Damned emission laws.