JD Jetting vs PCV

[cosi]

Hi guys,

I want to make sure I have the best tune available to me and I want to know what is the difference between the PCV and the JD Jetting tuner?

Is the PCV for making changes to the fuel and ignition map and the JD just for fuel and it makes finite changes on the go??

Can someone please explain?

I ride a 2010 SM510R

 

[gillies]

When you get your PCV, look me up and we'll drag race.

 

[Tinken]

The JD is less money, PCV is expensive. The JD tuner is a simple quick fuel adjustment tool that can be easily adjusted on the bike. You can get either fuel only or fuel and ignition for your Husky. The PCV has considerably more adjustments available and generally requires a computer or mobile pod. The PCV has internal mapping and adjustments which the JD just doesn't have. If you get the ignition version, ignition maps can be added to increase horsepower. The PCV is capable of multiple mapping including horsepower and mpg on the fly switches while riding. The PCV has AutoTune functionality like being adjusted on a dyno you can take with you.

When you get your PCV, look me up and we'll drag race.

I have a PCV. I'll race you.

 

[Mik-3]

That PC V is awesome, to me best money and i was test that autotune thing, my local dyno specialist was showing to me, how "bad" those maps was....
So was paying 50€ to that dude, he was making to my bike way more better maps, soo i would say go PC V and direct to adjust those maps in dyno.
But i are saying that is to me best way, becouse i was get my PC V maps in 50€ and that A/R line is straight and it is way more working bike now, then that PC V+autotune

 

[Big Timmy]

PC V with Autotune is the way to go. It also has an accelerator pump function and many other features. PC V lets you see what the last rides map actually was and any changes with the Autotune activated. It will show + or - in % to the fuel curve trims if you go up in elevation for instance, You just set the Target AFRs as you see fit and activate the Autotune feature and it will hit that target at all RPMs and all % throttle openings...

You have to ride it a while of course to do this but it lets you see everything going on your laptop after words. If you see any thing crazy on the screen that's out of the ordinary it is a great troubleshooting tool also. As it will tip you off if you have an intake air leak or something.

It also allows for a TPS reset and shows idle rpms when the bike is hooked up to the USB cable and idling static.

It is the best investment. You can load a new map from many available in minutes no trial and error. You will have an awesome starting point to run on and you can save that map, run the Autotune to overwrite it to make corrections for your altitude changes perhaps and accept what the Autotune has done to that map or start over again. Its awesome. Fun to play with.

The Accelerator pump function is the coolest thing about it if you've ever had a flame out and you can dial it in to stop it from doing that ever again to make it the best running bike all around.

Populate the boxes on the tables with a tad bit of fuel below idle rpm like +6% fuel being added to the engine while idling and below at 1500 and 1750 RPMs when the bike is %0 percent throttle opening and if it ever drops under that idle speed (1950) rpms it won't flame out.

 

[gillies]

I have a PCV. I'll race you.

From what I've read, you've done a lot more work than simply a PCV. I'm talking PCV w/FMF slip on versus JD w/FMF slip on in a simple drag. Anyone local? Win or lose, I'd like to put it to rest.

 

[Tinken]

Ty wanted to drag race once too, but it doesn't prove anything. So we did it on the dyno. The powercommander will outperform the JD on the Dyno.

Huskynoobee had a JD tuner on his 449 before he put a pcv on. Maybe he can explain the differences he found between the two in his experiences.

 

[gillies]

Proves who can win a drag race...

 

[Huskynoobee]

Cosi, you basically have it right and there are lots of things you can do with the PCV vs the JD.

I tried the JD first because I got it from another Cafe member for a great deal and the thing I was looking for was adjusting the off idle fueling to get rid of lean spots and smooth out delivery. While it was good for that and it was cool messing with it on the trail, it also helped when switching from the stock muffler to an Akro. Adding fuel in the top end helped too and it definitely helped over stock. I couldn't flash a better base map on my locked ECU, so it was a help.

Then, after Tinken let me try a unobtainable factory race ECU, I quickly realized how much more potential was in the bike, so it was time for a PCV. When I thought that I had improved the fueling with the JD, it wasn't even close to the ability of the PCV with the accelerator pump feature, the ignition advance, the multi step fuel functions that go way beyond the number of increments on the JD.

Once we loaded a couple of different maps at ZipTy HQ, I ran some test blasts and was simply amazed that it was even faster than the factory race ECU. VERY noticeable.

On tight trails and single track the worry of a stall at low rpm was gone. It has a two stroke like hit if you really wrap it around or it will just smoothly ramp up to the limiter if you like. Being able to switch maps on the fly is great and helps when you need to conserve fuel.

Truth is that Tinken worked on me for a long time while I fiddled with the JD (about a year and a half) and I can say that I can't imagine riding the bike without it.

Oh, and I'll drag race anybody with a JD any time. I guarantee my bike with just a slip on will spank a bike with a full exhaust system and a JD.

I wouldn't go trying Tinken though fellas. I rode his bike back to back while experimenting and that thing is the real deal. No other one like it outside a factory race bike, and those babies are all gone.

 

[Johnrg]

For me it was not even about performance JD vs. PCV but ability to run 2 maps. Then integrating Autotune and a configurable switch made it quite versatile. Bike runs perfect.

 

[cosi]

Thank you for the responses.

To be honest I was a little hasty with purchasing the JD as I read on the SMJ forums that the guys swear by them and I had already ordered the JD before I posted here

I have gutted the pipes and needed something to get me going as I don't think the standard ecu would have been any good.

It seems though that I might have to upgrade to a PCV with auto-tune some time in the future to get the most out of it.

This will prove interesting to have both on the dyno to see the results side by side.

Anyone got spare PCV or know where they are sold at a reasonable price?

 

[cosi]

When I thought that I had improved the fueling with the JD, it wasn't even close to the ability of the PCV with the accelerator pump feature, the ignition advance, the multi step fuel functions that go way beyond the number of increments on the JD.

I was just reading the stats on the JD and it mentions the accelerator pump surge circuit. Is this the same feature.

Damn, I really want a PCV now. Hasty is the word of the day for me right now lol

 

[cosi]

Huskynoobee, I will be riding my bike around pretty much all the time and I won't really want to tune this myself. If I take it to the dyno for a tune, will I need the autotune.
I ma guessing its a good idea as it will provide finite tuning during weather and elevation changes, right??

 

[cosi]

Sorry about my multiple posts but I can see they are still waiting on approval to be posted.

I called a few dyno places and they all say that the auto-tune is a waste of money if you aren't racing at different tracks and so on.
I won't be racing and in fact I will be mostly riding to work and weekend twisties with some elevation change.

What are your thoughts, to buy the auto-tune or not to buy??

 

[Big Timmy]

Get the Autotune and don't look back. Loading a map from somewhere else that was made or written at a different elevation than where you may ride? It is worth every penny.
You don't have to run it with the Autotune activated all the time.
I don't have a high and low power setting switch on mine for multiple maps or fuel saving. I run it on the high power setting from the PC V all the time. With the Autotune activated all the time.

 

[Huskynoobee]

Try motomummy for your PCV. I personally don't run an auto tune because I didn't see the need for an extra device, plus it's not really essential. After installing mine I went on a long ride day ranging from the floor of Death Valley to the top of Telescope Peak at 11043 ft and it didn't miss a beat. Not knocking it mind you, and I know those who use them swear by them. Especially if your bike doesn't have many maps that are written for it.

 

[Johnrg]

I run autotune (though have it turned off now since I created my maps), since the 310 is sensitive to minute fueling changes and exhibits change at high elevations where mistakes due to a stall or hesitation can prove deadly. Any tuner will tell you they are king as they have the investment and experience. But even Dynojet will explain that after a Dyno session that Autotune will make incremental changes to a map based upon real world riding, not linear throttle use. I found this to be correct after Dynojet installed both PCV and Autotune in Las Vegas and returned to Sea Level and turned on Autotune to see what occured. Minor 1-3% changes in a few low throttle opening cells was about it. And that is where one might expect some variance from shop to real world. If you always ride in a region where your elevation is consistent and within 6500 feet or so there probably is no reason to have Autotune. Especially is you had a Dyno map generated in that region. But if you run like me at Sea Level and then hit 13k feet of elevation a few times of year a second map or Autotune running will be of assistance.

Some ECU's and engine systems may accomodate barometric changes better than others. Their sensors may do more. Only you can decide what you need based upon your bikes performance where you ride. My issue was visits to high elevations: Popping and close to back firing on descents from elevation, having to keep the throttle open to ward off stalls, being flooded on hot starting at elevation, etc... I wanted a high elevation map. Only one solution. Once I decided to go for it I could not just stop with the PCV since I was the only one with a '13 310 and a PCV according to Dynojet (and why they set me up). They tried to convince me the PCV and a Dyno run would suffice, but I pushed and asked for Autotune also and a switch.

I was told I could just leave it on and it would adjust to suit. Well.... the switch was a very cheap part and any switch will do it so I asked for one to be installed so in the end I would have what I wanted in the first place... A dedicated high elevation map and switch. I would do it all again but if I knew someone with the maps and could get away without Autotune and maybe just a switch, I would do so, but being the only one with a PCV on a 13 310, I was leading the way and pleased with my decision. I make the maps and my bike runs flawlessly. Job done myself and I don't need to talk to anyone, a dealer, a tech, etc... I just go and enjoy my very well tuned machine thanks to Dynojet.

Obviously there is a cost and that includes installation and welding to swap a 12mm bung for an 18 if you chose to add Autotune or a Dyno run. I was lucky in that regard but some homework assessing who may have maps, can allow you to simply install the PCV alone, load your map and run.

 

[Tinken]

I saw you and your bike in Gorman. It ran very smooth and I was impressed. I don't think that the autotune I s absolutely necessary, but with a little work, can provide a better tune.

 

[cosi]

My elevation won't change that much at all if any to be honest. I think I'll go for just the PCV and the dyno guys here seem confident they'll create a map from scratch. I'll give that a go and if it still needs fine tuning I'll get the auto tune and in stall it later. It seems like it's plug and play.

Motomummy seems to be the cheapest.

 

[cosi]

Checked with motomummy and they are not in stock and their flat rate shipping could be more than 2 weeks.

I wouldn't know where to search for charts except to ask on here. I'm pretty much at sea level and wouldn't ride a more than 50-80 metres (150-240 feet) on any given day because I live around the water and on weekends night do a mountain ride to 400 metres (1200 feet)

It seems there is no harm in getting the auto tune and I won't use the switch to change maps. Then again how much difference can a few hundred feet make?