Jackson Racing Supercharger Owners Thread

[CSG Mike]

Originally Posted by J1Avs

I don't doubt where it shines at all -- was speaking specifically peak w/ JRSC. I don't see it gaining much on the peak number...perhaps across the middle of the powerband, but my current lines are pretty smooth all around -- definitely no complaints -- I need to get my dyno sheet posted.

To be fair also, I have PTuning tuning my PTuning header and JRSC, so having the tuner who designed the header also tuning my car with it definitely makes a bit of a difference there. Similar to how you'll get the best result with the A350 when working with Delicious because of the amount of time they put into mastering it.

Quite the opposite. The Ace simply out-flows everything, but flow is limited by the small choke point, which in this case, is the engine. Once the engine is the limiting factor, the Ace no longer has an advantage; the engine is the limiting factor at higher RPMs.

Now, once you add the supercharger to the mix, the supercharger is literally shoving more air into the engine, and it has to go somewhere. This extra flow, is what truly allows the Ace to shine.

Even with stock cam timing profiles, if you tune on an Ace header + C38/C30 HBP + pump gas, if you swap on another header with just that ignition timing table, you'll knock before you can redline; the Ace just flows that much more and allows for more cam timing.

Here's an example.




JRSC C30 + Ace header + flex (E70)+ HBP

[mrg666]

Originally Posted by CSG Mike

Quite the opposite. The Ace simply out-flows everything, but flow is limited by the small choke point, which in this case, is the engine. Once the engine is the limiting factor, the Ace no longer has an advantage; the engine is the limiting factor at higher RPMs.

Now, once you add the supercharger to the mix, the supercharger is literally shoving more air into the engine, and it has to go somewhere. This extra flow, is what truly allows the Ace to shine.

Even with stock cam timing profiles, if you tune on an Ace header + C38/C30 HBP + pump gas, if you swap on another header with just that ignition timing table, you'll knock before you can redline; the Ace just flows that much more and allows for more cam timing.

Here's an example.




JRSC C30 + Ace header + flex (E70)+ HBP

Thanks for the data, I wish I could have installed the Ace header. With a cat requirement for emissions in NY, it is not happening, unfortunately.

[jflogerzi]

Originally Posted by peaches

Yes, Jackson Racing support assured me the stock block would hold with this setup (all depending on a good tune, which I have been told is still conservative)

That's bold... The way the kit builds power stress is lower on the rods etc... But when adding boost there is no guarantee. Shit people have blown motors NA at the track...

Sent from my GM1915 using Tapatalk

[Irace86.2.0]

Originally Posted by jflogerzi

That's bold... The way the kit builds power stress is lower on the rods etc... But when adding boost there is no guarantee. Shit people have blown motors NA at the track...

Sent from my GM1915 using Tapatalk

People blow built motors too at less power. Shit happens. I think JR is trying to suggest that the setup is clean for the stock block for practical applications for most people.

[jflogerzi]

Originally Posted by Irace86.2.0

People blow built motors too at less power. Shit happens. I think JR is trying to suggest that the setup is clean for the stock block for practical applications for most people.

I agree but as a manufacturer I wonder never tell a customer that. But most ppl who boost the twins know what they are in for.

Sent from my GM1915 using Tapatalk

[Irace86.2.0]

Originally Posted by jflogerzi

I agree but as a manufacturer I wonder never tell a customer that. But most ppl who boost the twins know what they are in for.

Sent from my GM1915 using Tapatalk

I have been at 12.5-13psi (85mm pulley) on a Harrop SC and E85 for over 6 months with a conservative tune as well. I haven't blown anything. The Edelbrock kit comes with a pulley that is smaller than mine, and the Edelbrock kit comes with a warranty, so I am not surprised JR assured him all would be ok. Adding E85 makes more power, but decreases the risk of knock and keeps temps down, so it is more of a trade off, and it gives room for a conservative tune.

[peaches]

So far my only regret is using 1,200 cc injectors, too much fuel when driving slow in the city. Other than that it drives great, seeing AFRs under 11.2 at full boost which is only reaching 10.7 PSI. Going to Daytona next week, we'll see what happens then.

[mistople]

Originally Posted by mrg666

Thanks for the data, I wish I could have installed the Ace header. With a cat requirement for emissions in NY, it is not happening, unfortunately.

It's...the best.

All of my worries about not feeling enough power down low were put behind me after I finally installed the kit alongside my existing A350. It pulls hard from 3k and up, even at partial throttle!

[CSG Mike]

Originally Posted by peaches

So far my only regret is using 1,200 cc injectors, too much fuel when driving slow in the city. Other than that it drives great, seeing AFRs under 11.2 at full boost which is only reaching 10.7 PSI. Going to Daytona next week, we'll see what happens then.

That's extremely rich; sounds like you need more correction on your tune for the injectors.

Injector size doesn't affect MPG on this car, as we have both DI and PI, and the DI is used under light throttle condition unless you have an unusual tune.

[peaches]

Originally Posted by CSG Mike

That's extremely rich; sounds like you need more correction on your tune for the injectors.

Injector size doesn't affect MPG on this car, as we have both DI and PI, and the DI is used under light throttle condition unless you have an unusual tune.

I'm not complaining about MPG, haven't been tracking it that much since the install but I know it's down a bit. My issue is more about driveability, sometimes the car stalls because according to the tuner "it chokes because there's too much fuel under light load". My biggest complaint is if I don't give it enough gas when starting to move from a stop, sometimes it bucks or stalls. Again, attributed to the too much fuel as explained by the tuner. Once I'm moving, the car drives fine. If I do a hard pull on the highway, it drives fine.

The other thing I was advised of but haven't experienced yet is that if I have to use pump gas (93) instead of E, the car will have a hard time starting because again, too much fuel and the timing on the injector can't be reduced further.

If all this sounds like a bunch of crap, please let me know and I'll find a different tuner. I can take a log and look at the real numbers, the 11.2 was me just glancing at my gauge quickly while driving. I have a track day scheduled next week, if you don't think the car is safe to drive hard based on what I've said let me know. I can get a log once it stops raining.

[CSG Mike]

Originally Posted by peaches

I'm not complaining about MPG, haven't been tracking it that much since the install but I know it's down a bit. My issue is more about driveability, sometimes the car stalls because according to the tuner "it chokes because there's too much fuel under light load". My biggest complaint is if I don't give it enough gas when starting to move from a stop, sometimes it bucks or stalls. Again, attributed to the too much fuel as explained by the tuner. Once I'm moving, the car drives fine. If I do a hard pull on the highway, it drives fine.

The other thing I was advised of but haven't experienced yet is that if I have to use pump gas (93) instead of E, the car will have a hard time starting because again, too much fuel and the timing on the injector can't be reduced further.

If all this sounds like a bunch of crap, please let me know and I'll find a different tuner. I can take a log and look at the real numbers, the 11.2 was me just glancing at my gauge quickly while driving. I have a track day scheduled next week, if you don't think the car is safe to drive hard based on what I've said let me know. I can get a log once it stops raining.

I'd have to see a log to determine if it's safe or not.

However, street driven GTRs and such, all drive just fine on injectors larger than 1000. 2000cc injectors on street driven cars is not rare nowadays, with how much development there's been. If you're on ID's, then the injectors are already pre-measured to make the tuner's life super easy.

Give your tuner the opportunity to make it right first. If they can't or won't, then Zach (CSG) can tune your car.

[peaches]

Originally Posted by CSG Mike

I'd have to see a log to determine if it's safe or not.

However, street driven GTRs and such, all drive just fine on injectors larger than 1000. 2000cc injectors on street driven cars is not rare nowadays, with how much development there's been. If you're on ID's, then the injectors are already pre-measured to make the tuner's life super easy.

Give your tuner the opportunity to make it right first. If they can't or won't, then Zach (CSG) can tune your car.

I'll send a log as soon as I can.

[tomm.brz]

Originally Posted by CSG Mike

That's extremely rich; sounds like you need more correction on your tune for the injectors.

Injector size doesn't affect MPG on this car, as we have both DI and PI, and the DI is used under light throttle condition unless you have an unusual tune.

do you think under boost 11.2 is extremely rich? even for FI track car with cat?
what do you repute a good afr for Supercharged car? catted or uncatted? thanks

[jflogerzi]

Originally Posted by tomm.brz

do you think under boost 11.2 is extremely rich? even for FI track car with cat?

what do you repute a good afr for Supercharged car? catted or uncatted? thanks

Second this. I don't have a wide band but under WOT my tune reads 11 which according to my tuner the car stock AFR sensor won't go below. Car runs perfect overwise besides my milage tanking on pump and E85

Sent from my GM1915 using Tapatalk