Who you talking to Willis ? That is a "Movin on up " reference and now that I think about it , you are probably not long enough in the tooth to recognize it.We all sleep but we are just so excited to come see you all.
Jefe might not get it, but I remember this one 
Don't you guys ever sleep? 
We are thinking that the friendly competition might need to extend to here later in the day - 
Can you please elaborate on this statement ......
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We have been testing a lot with the supercharger and can make even more power than this with some other exhaust setups we have been fitting up to our Slingshot. That being said, the other setups we have been testing are definitely louder than this setup, which is fun while full throttle, but can become kinda annoying while just cruising around. This setup seems like it is going to be great for those that do not need every last drop of horsepower, but want good performance that is very easy to live with while driving. The other neat thing with this setup is that you can hear the supercharger intake and blow off valve much better.
We were very happy to get one of the early 2.5" Welter Performance dual exhaust setups to test with our DDMWorks supercharged Slingshots and we are pretty happy with the results. While driving the exhaust is still able to be heard, but since it exits behind the Slingshot now, it makes cruising around much more enjoyable than with the standard or side exit exhausts we have driven. This setup seems to be a nice compromise of sound and power that I think a lot of people will be happy with.
DDMWorks Slingshot Rotrex Supercharger Kit
We have it installed and took it down the road
Next step is to put it on the dyno tomorrow and introduce the exhaust to the supercharger power and see how it likes it 
I missed something???? Complete Price?
The DDMWorks Supercharger Kit - $4900
DDMWorks Slingshot Rotrex Supercharger Kit
Center Feed Fuel Rail - $275
2.4L Slingshot Center feed Fuel Rail by DDMWorks
1320 header and exhaust - $945
That is all that is on our test car right now, lots of fun
I don't have ball joint issues but was going to check around today about removing the bushings to powder coat my control arms. I guess my questions are answered by Jeff's lack of donuts.
Make sure to mark the orientation of the mounting tabs on the bushings so that when you press them back in, they are in the same orientaion. Jeff punched some marks on the control arms at the end that lined up with the tabs on the bushings, that way when they came back from powdercoat the orientation was easy to find and line back up.
@Jeff@DDMWorks - has obviously not had enough doughnuts yet.
IIRC, there is a post over on the other site reporting that during a turbo installation, some of the factory head bolts were discovered to have not been properly torqued, meaning that the engine could have self-destructed due to what would have been very unlikely to have been discovered after the fact.Here's a link - Attention Turbo Users. You might want to check this. | Polaris Slingshot Forum
Do you know how it was determined that the head bolts were not torqued properly? There is no set torque value for the stock head bolts, the torque in that manual that was posted in that thread is 22 ft/lbs + 155 degrees, there is no way to check if the 155 degrees was completed, unless they were just completely loose, which is what it kinda sounds like in that thread. That type of torque rating is a very common thing with GM engines, they will list the torque as X ft/lbs plus an additional rotation of X degrees on most of their torque to yield fasteners. If you want to be able to check the torque, there are simple tools that you can buy to be able to measure the degrees after you reach the base torque, the look like this -
You can pick cheap ones up on Ebay, Amazon, etc
So far, we have not noticed any loose head bolts on any engines we have taken apart for engine builds here, but something that we will check from now on and if we start to see any patterns with it, definitely will let people know on all the forums and get that information out.
PM me with what you need from me to upgrade the pulley please.
Power is addicting.
We are getting the upgrade on the site for purchase, should have it up by tomorrow afternoon. Once it is posted, I will post up the link and we will get one on the way to you.
I will have @Jeff@DDMWorks post up a picture of what he was using, fair warning it was not very pretty.
Dave
Will you take a stage 2 turbo kit with 400 miles on it in trade
LOL, we can add it to the 2 other turbo kits we have here that we removed for customers and installed superchargers on If your serious, shoot me a PM and I can fill you in on the deal we gave those guys.
OK, so I am wondering. If someone wants to Powder Coat their control arms, can ya take out the ball joints and reuse them or install new ones?? If u have to gt a new control arm they are already installed.. HMMMM
We are doing another build here right now and the customer wanted the A arms powdercoated, so we had to figure out how to get the ball joints out and back in. The service manual states that there is a special tool from Polaris to do that, however when we go the tool, it did not quite work like we hoped. So we ended up making a tool here to remove and install the ball joints. It is not that tricky to do, but the A-arms do not have a really nice surface to press on to get in and out. On that build, we did re-use his stock ball joints since his were fine.
Hope that helps,
Dave
This has me super excited lol
No head stud or connecting rod upgrade?
We have been testing everything here on a completely stock engine, no head studs and no upgraded connecting rods. None of the kits we have shipped out have been installed on anything but stock engines that we are aware of. We are testing something special on a built engine here and will have more information on that later once we are complete with it.
Free flow exhaust. If I have removed the cat on stock is that considered free flow? What negative effect will it have on the engine overtime? I know a loaded question. And driving normally, what MPG will it get? Normally meaning speed limit.
We can install the supercharger kit on a completely stock engine with stock exhaust and stock catalytic converter and it will run fine, however it will be down on power. We typically run a slightly larger pulley on stock cars and keep power to around 230hp at the wheels. A stock exhaust with the cat removed does pretty good and we keep those around 250-260hp at the wheels, safely. The problem that typically is going to cause issues with this engine is backing up heat into the cylinders, which causes issues with the pistons and the upper ring land. That is why typically we can run higher power than the turbo guys on a stock engine, we do not back up heat into the cylinder head as much as the turbo guys. Also, the supercharger doesn't create a big torque spike like the turbos in the lower RPM range and the supercharger can not overboost since the boost is determined by the pulley size on the setup, all of that adds up to more safety with the stock engine. The more restriction that is removed from the exhaust, the less heat that is trapped back at the cylinder head and piston, the more we can increase the flow through the engine and more power, simple as that. This engine should go for a long time if you keep it cool and take care of it, even at these power levels. On the LE5 we have lots of customers well over 100k miles with similar or more power at the wheels.
As for MPG, on the trip that this took out to Arkansas, the dash was reporting into the 40's, but that is not accurate. We have found that anytime that you swap the injectors and MAP sensor in these vehicles, it messes up the calculated MPG on the dash display. Going by actual mileage driven divided by gallons to fill it back up, we averaged around mid 20's MPG.
Hope that helps,
Dave
If it just takes doughnuts to make more power then I have small nuclear reactor just waiting to be unleashed.
Look at all those red sprinkles!
There was originally 2 sprinkle doughnuts, but we made too much power, so I had to eat one. If it was up to me they all would have had sprinkles, but no chance of the engine surviving that
The only thing our setup has is a 1320 header and exhaust, our center feed fuel rail and the supercharger kit. Everything else is stock. Any free flowing exhaust without the stock catalytic converter will work though.
So the recommended items for this power level would be -
Supercharger kit
Free flow exhaust
Header
Center Feed Fuel Rail
I would also suggest some kind of brake upgrade, since if you are accelerating harder, you need to be able to stop better also. A stickier rear tire would also be advised, since the stock rear tire is begging for mercy at this power level.
Hope that helps,
Dave
We have been very happy with the DDMWorks Rotrex supercharger kit and its performance, it makes the Slingshot a lot of fun. The compact supercharger unit has been very reliable and with a simple 1320 exhaust and header installed, we have been making around 280hp at the wheels with a nice flat torque curve, perfect for carving canyon roads or blasting down the interstate. Even though customers have been happy with that power, we always want to keep pushing the power and so we are happy to offer another tested pulley option to our customers. The new pulley is slightly smaller, spinning the supercharger a little faster and bumping power another 25hp at the wheels, while also elevating the entire torque curve at the same time, the result is 305hp at the rear wheel, enough power that I was spinning third gear all the way up to 6000RPM yesterday
Have any other questions? Just let us know, we are always happy to answer them.
More information on the kit can be found here - DDMWorks Slingshot Rotrex Supercharger Kit
For those that want to see how we actually made the extra power, here is an exclusive sneak peak for Slingshotinfo forum members only! -
Sorry, missed your thread while I was gone, if you end up needing anything else, give me a call, we have some take-offs here also. Atleast you didn't need a supercharger also though
