I am patiently waiting to show off my surprise to everyone. I haven't got it yet. But soon.
Posts by larry
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Its underwear... I'm telling you.... slingshot underwear... aka thongs.
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I have a surprise coming and it's going to be AWESOME!
Going to be a few days. But trust me. Its AWESOME!
Give us a hint, quit being a ass...!!
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I knew it............ Someone would stir @Dave@DDMWorks up and he would drag the dry erase board out!
You got to admit, it is awsome...! Love you like a brother from another mother @rabtech but that was a awsome post...!
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Display MoreHello,
I started a new thread here as a place where some posts can be answered and openly discussed. When posts are made in specific vendor sections, we do not respond in that specific vendor thread as other vendors do not respond in our specific threads. It is kinda an unwritten rule, but generally frowned upon for vendors to post in other vendors sections. So hopefully, this is a nice middle ground where there can be an open discussion about topics that may pop up in those threads.
There is a new turbo thread by ZZP that had a post that tagged me and I would like to pass some more information along about the post I was tagged on and another one, here are the 2 posts by @MrGrey and @SSREAPER
- you think supercharge is safer than turbo? i know a few people who has blown their engines from running supercharge or turbo.
you’re still forcing air to the engine.. keep that in mind.. it’s kinda like choosing between smoking cigarettes vs smoking e-cigarettes.both will kill you in the long run..
- @MiM @MrGrey
I am by no means a forced induction expert but in my opinion
...Super chargers are indeed safer than a turbo for people who dont know how they work. The superchargers air induction is in direct alignment with engine rpm...the numbers are repeatable. At a specific RPM you have a specific amount of air being induced. The only way it changes is if you change the pulley on the supercharger. When the kit is designed, it is designed with the safety limits of the engine taken into consideration. There is no need for gauges although having them just to keep an eye on things is a great idea.
Turbos rely on the exhaust to spool it and drive it and that alone introduces variables. Being able to have a controller to change boost levels introduces another set of variables. Variables on top of variables on top of variables creates a situation where one thing goes out of whack and the whole equations goes to hell. If you like to fiddle and know what your doing... turbos are great
That to me is a factor to turbo or to supercharge.
Now 2 things... 1:If I am wrong then @Dave@DDMWorks who is considered to be the master of BOTH systems please educate me.
2: Nowhere did I say one was better than another so dont go there!!
SSREAPEROur supercharger kit has had a fantastic reliability record, even with the vast majority of those installed on completely stock engines. There is only one engine that we know of that has had an issue with our kit, however it was not on our base kit that we have for sale and was running higher boost pressures. As far as we know, no one with one of our base kits has blown an engine. We know of some other supercharger kits that have had engines that have failed though and over 50 turbo engines that have failed. We honestly lost track of the number of blown turbo engines after we got to 50, and while typing this actually just talked to another one. Based on the number of sales of all forced induction kits the turbo kits have had the highest percentage and the highest number of actual failures though. There are several reasons that these turbo kits could cause an engine failure along with how the slingshot is driven. Some of the design choices in these past turbo kits could have been better and some quality control issues caused most of the failures we have seen.
As for which is safer for the stock engine, supercharger or turbo, at this point our supercharger kit has definitely proven to be safest option for the Slingshot to date. We have put a lot of testing and development into our turbo kits coming out and ZZP has a lot of experience with the Ecotec also, so going forward the newer turbo kits just showing up should be a lot more reliable than those of the past.
That being said, an engine that is designed for forced induction can be safe just as safe with either the supercharger or the turbo, if that engine was designed for it. A naturally aspirated engine though, like what is found in the Slingshot, that has boost added to it does present a little more of a challenge to do safely. Most all of the failures we have seen of engines from the turbo kits involved 1 of 2 failure mechanisms.
To understand those failures a little more, lets look at the pistons on the LE5/LE9 engines, which were designed as a naturally aspirated piston. When OEM's design a piston for naturally aspirated, that piston is designed differently than a forced induction piston typically. The naturally aspirated piston has an upper compression ring that is kept relatively close to the top of the piston, also the ring gap is typically kept tighter to allow the combustion pressures be as efficient as possible. The downside to this design is that when you start adding more air into the engine by forced induction, the cylinder pressures and temperatures start to rise. Since these naturally aspirated pistons are not designed for that, as the temperature and pressure rise, the heat gets into the piston and starts to affect it. One thing that can happen is the upper compression ring is heated, that upper compression ring starts to expand and eventually with enough heat, the ring gap can completely close down. Once the ends of the ring can no longer expand, the ring will keep trying to expand and push harder against the cylinder wall and also push on the top of the piston. In most of the failures we have seen, this force causes the piston to fail and a piece of the top of the piston comes off and starts to destroy the cylinder. Typically this happens on cylinder 2 or 3 since those are also the cylinders that run the hottest in a stock LE5/LE9. Occasionally it would happen on cylinder #1 since that is the last cylinder to get coolant, rarely on cylinder #4 since it runs the coolest.
That being said, heat build up causing piston failure is by far the biggest reason for engine failures that we have seen on the Slingshot. A turbo installed on the Slingshot becomes an exhaust restriction in the system and backs more heat and pressure back into the engine than the supercharger setups. Depending on the turbo being used, turbine A/R and the exhaust manifold design, the exhaust manifold between the engine and turbo will see around 1.5 to 2 times the pressure seen in the intake manifold with a turbo setup. On the supercharger setup, since the exhaust is basically wide open, exhaust pressure is more similar to stock, depending on exhaust design and engine RPM. That big difference in pressures between those 2 setups is one of the reasons that the supercharger has been safer on the stock LE5/LE9 engine. Without all of the backpressure, the heat can flow out of the supercharged engine easier. That being said, other issues like mismatched fuel injectors is something that we take care of by making sure that all of our fuel injectors are flow matched to within 1% flow rate. I do not believe that ZZP is including fuel injectors with their kit, so being dependent on the stock fuel injectors they should be good there also. The HAHN kits used to ship with non flow matched injectors, but I am not sure on the current batch if they are matched or not. Some of the Alpha kits had issues with MAP sensors coming out under boost, which also affected the fueling and would cause engines to be destroyed. Our kits ship with a MAP clip to ensure the MAP sensor does not come out and once again, I believe the ZZP kit uses the stock MAP sensor which locks securely in place also.
So, as of now, I would say that the supercharger kit has been the most reliable for several reasons. With the new turbo kits coming out though, I would expect that the newer turbo kits will also prove to be just as reliable at lower boost pressures and below 300hp/torque. Of course, when supercharging or turbocharging a stock engine you always run the risk of damage to the engine and should take that into consideration before making that decision.
Hope that helps,
DaveThis is the greatest post I have ever read on this forum in the 2 years I’ve been on it, absolutely great information I have ever read about being boosted, thank you Dave for this kind of information you have posted......
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@Gaurdian_Angel you should have screemed then I could have screemed back, then all the Leo’s would have showed up....
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Damn I’ve got to go on a diet...!
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When are the 2019’s supposed to be out... ? Or does anyone know... sorry in advance if I’ve missed the date in any post.......
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Just had installed new Yellow Top battery, on riding on a bumpy road my Brake Failure light came. When I shut the SS down and restarted it was not on but after a short period (a few miles) it relit. I’d the same process over several times. Checked all connections of brake system including fluid level. ANY IDEAS?
Drive it like you stole it, mines been on and off exactly like your describing, carried to dealership they have ordered the sensor’s,
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@rabtech you better than jc penny’s ever thought about being...... that’s why they shutting down stores, they need you as a buyer....! You go my brother........!!!! You got this...
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Display MoreThis was taking it a tad easy at several times because cheryll was scared I would kill the guy.
Sent from my iPhone using Polaris Slingshot Forum mobile app
Great video, show’s some can hang with the crotch rockets...very impressive... SLINGS CAN HANG..
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this is just a few items i just sent to the store. I uploaded 290 different items.
Here are a few new items in the store. And I'm still waiting on support to tell me why i cant upload my embroidery file for the caps and hat and beanies. And Im currently adding more designs for the shirts. I am adding them soon. It just takes so long. Each design has to be positioned and each color of design has to be a separate item because i also offer multiple color shirts with multiple color designs.
I have your Christmas presents shopping location covered. If y'all cant find something for a slingshot owner in the online store....... I give up...
Love the beer mug colors...JS...
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I think it was just a couple of days ago that someone posted how much vibration is gone when they use a small bit of fuel hose between the mirror and housing .... can't remember who to give credit to though maybe @wjfyfe
@Ross you are correct I seen that same post and I plan on trying that fuel line hose fix this weekend...
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if it fits
Rodger, Rodger. What's our vector Victor?
Probably EPS.JPG
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I don't think the mirrors are useless at all. If you set them to wear they are barely have the vehicle in the corners then you got excellent visibility with very little blind spot. I don't worry about who is behind me when riding down the road.
@Aceman if you road on our interstate’s we have here or our lovely back roads at any speeds above 60mph you would understand about the mirror issue, our sling is a 2016 model and they suck past 60 mph, I get nothing but vibration in my mirrors.... can’t tell what is behind me nor beside me know I don’t care what’s behind me but I’m not always in the front..my point being it’s cool to know what’s behind you with a push of a button especially the side view....
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@larry, I forget...did you post your build somewhere for that little project?
No I didn’t, you would have to ask rab, I was there holding the radio he was doing all the wiring, after trying to get to the harness on the transmission, he decided to connect it to a dash switch.....you would have to take half the sling apart to get to the switch on the tranny....
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I was thinking the same thing... wonder if there is a way to make the transmission switch cycle on command?
It’s really cool to push a switch and it pop on so you can see the full screen behind you going down the road....... I’m catching myself watching this more than looking at the radio...especially with those useless out side mirrors........!
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Received our new coffee mugs today
Here is another shot of the coffee mugs, they look good sitting on the black nose....
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Received our new coffee mugs today
