Jackson Racing Supercharger Owners Thread

[0351USMC]

Originally Posted by *LongFella

CSG David - You know he's buying my Jenny, right?!? ;-)

Sure am!!!

[tnle]

Out of curiosity, do you guys have a Australian distributor?

[Xuningshen]

First time I really drove my car [up a mountain] or even kept the rpms high for more than a quick minute. mt wilson roads. it was really fun! haha the kit is great.

[CSG David]

Tune for 7400, shift at 7000. No offense, but this is an FA20 motor we are talking about. Everything has to make sense.

[CSG Mike]

Originally Posted by tnle

Out of curiosity, do you guys have a Australian distributor?

We ship internationally.

[0351USMC]

Originally Posted by CSG David

Tune for 7400, shift at 7000. No offense, but this is an FA20 motor we are talking about. Everything has to make sense.

From Moto-East:
I'd keep the revs at 7850. Our car is between 7650 and 7850 (soft cut starts around 7750 usually and full cut at 7850). Hard core auto-x folks will spin to 8000 to get more MPH, but I wouldn't go higher than that with this valve train and stock rods.

Mike

[tnle]

Originally Posted by CSG Mike

We ship internationally.

That's break the bank levels of hurt with international shipping, low exchange rate and tight customs lol

[CSG Mike]

Originally Posted by tnle

That's break the bank levels of hurt with international shipping, low exchange rate and tight customs lol

It's no different from a distributor still having to pay for shipping and customs, and deal with the exchange rate, except you get CSG support

[Casey10s]

For the CSG people, I am running Amsoil 10W30 on my JRSC and I think that is what you use. How many miles do you recommend until the next oil change?
Mostly will be street use with maybe some track at some point.

[*LongFella]

Originally Posted by CSG David

Tune for 7400, shift at 7000. No offense, but this is an FA20 motor we are talking about. Everything has to make sense.

^This

Don't push it more then you need to, unless you have the money to replace an engine...

[CSG Mike]

Originally Posted by Casey10s

For the CSG people, I am running Amsoil 10W30 on my JRSC and I think that is what you use. How many miles do you recommend until the next oil change?
Mostly will be street use with maybe some track at some point.

We use Motul 300V 5W30.

The only way to determine your oil change interval, accurately, is to get an analysis performed by Blackstone or Dyson.
http://www.blackstone-labs.com/
http://www.dysonanalysis.com/

We use Blackstone, but both are excellent.

[CSG Mike]

Originally Posted by 0351USMC

From Moto-East:
I'd keep the revs at 7850. Our car is between 7650 and 7850 (soft cut starts around 7750 usually and full cut at 7850). Hard core auto-x folks will spin to 8000 to get more MPH, but I wouldn't go higher than that with this valve train and stock rods.

Mike

I would never rev a stock engine that high. That's asking for an engine failure very, very quickly.

With a full cut at 7850, the engine will still have enough revs to easily hit 8250 RPMs, at which point, you'd actually be spinning the Rotrex to past it's spec as well.

The reason we (CSG) recommend shifting at 7000, is because the TPS and PPS have approximately a 0.04s delay in response. This is enough time where if you have well developed shifting technique (lifting the throttle right as you clutch in), there is a 0.04s long moment where the engine is essentially being free revved at WOT.

Now, you say, wait, there's a rev limiter at 7400! Yes, there is! However, RPMs also have momentum, and if your engine's rate of RPM climb is not zero or close to at 7400, the momentum will still take the RPMs higher.

Our datalogs show that at WOT, a 400-450 rpm rise is frequent.

That's why we recommend shifting at 7000. There's so much more power with the JRSC that you WILL overrev your engine if you're not careful. With a higher redline, the results are catastrophic.

Statements like that make us question how much testing has been performed by other Jackson Racing distributors.

[CSG Mike]

Here's some datalogs illustrating what's going on. This is a lap at WSIR (available in Gran Turismo 6) that shows the RPM plot, throttle position plot, and clutch position (on/off switch).



Now, lets zoom into that spike with the peak RPMs.



You can see clearly between the 2nd and 3rd graph, that I am COMPLETELY off throttle, before the clutch sensor is engaged. However, being an on-off switch, you can't see the exact position of the clutch.

Between 1.00.46 and 1:00.56, there is a surge of 554 RPMs, which occured from a WOT shift at 7209 RPMs.

As you can see from the first, zoomed out graph, there are a LOT of RPM surges at WOT shifts, which happens with any FI solution. You'll also note that all of my shifts, except for that one, occur at 7000 RPMs.

This wasn't even a record lap attempt at WSIR. You can imagine the RPMs with a 7850 redline...

[0351USMC]

Originally Posted by CSG Mike

Here's some datalogs illustrating what's going on. This is a lap at WSIR (available in Gran Turismo 6) that shows the RPM plot, throttle position plot, and clutch position (on/off switch).



Now, lets zoom into that spike with the peak RPMs.



You can see clearly between the 2nd and 3rd graph, that I am COMPLETELY off throttle, before the clutch sensor is engaged. However, being an on-off switch, you can't see the exact position of the clutch.

Between 1.00.46 and 1:00.56, there is a surge of 554 RPMs, which occured from a WOT shift at 7209 RPMs.

As you can see from the first, zoomed out graph, there are a LOT of RPM surges at WOT shifts, which happens with any FI solution. You'll also note that all of my shifts, except for that one, occur at 7000 RPMs.

This wasn't even a record lap attempt at WSIR. You can imagine the RPMs with a 7850 redline...

Wow, that's good stuff to know. Yeah I think the safer bet is the stock rev limit of 7400 and shifting at 7000. Thanks for the info!