My new buggy!
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Hi everyone,
Hereare some pictures of my new race car I got for Christmas. It's a Losi 8ight 2.0. I am going to break in the engine on Saturday. It's so clean right now Idon't want to get it dirty, but I know I will. http://www.rcuniverse.com/forum/js/f...wink_smile.gif I caught my dad taking a picture of one of his cars next to the fireplace, we all made fun of him, so decided it will be a tradition for each new car!! I'm going to run Nitrotane 30% on this engine. Do you think that is okay, or should Igo with 20%, which I use on my other cars? I also want to get some AKA City Block tires for when I race it. Ilove the transmitter that comes with it, and Iam going to get the same receivers for my other cars so I can sync them up. |
RE: My new buggy!
I also noticed that it has a two-shoe clutch setup and that surprised me. I will try it with 2-shoes, but want to upgrade when Isave up some money. I've read where some people run 4-shoes on this buggy, but was thinking about the M2C 3-shoe. The part number is M2C6090. Do you have any recommendations on this?
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RE: My new buggy!
Congrats, nice car! I assume your local track will tell you what fuel you should use in order to be in line with their rules. If they allow it, go for the 30% (will this engine need a shim for 30%? I don't know, but you should check with people who do know). As for clutch shoes, I'd say try it as it is until the stock one wears out, at least then you'll be able to say what you need for the next one, rather than going pot luck.
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RE: My new buggy!
Nice buggy! The 8ights are nice. If you run 20% in everything else it would make sense to just run 20% in this one too just for simplicity. But running 30% won't hurt it at all. You don't need to shim it either. 30% will give you a marginal performance increase. I did some testing with 20% vs. 30% fuel about a year ago to test the RPM and speed difference between the two. I did the testing in a 1/8 truggy with a couple different engines ( LRP .28, Werks B6 and an OS .21Vspec) and the difference was roughly the same between each iof them. 2-3 MPH increase in top speed with 30% fuel and an increase of approximately 1000-1500rpm. One benifit of 30% over 20% is you have a wider "tuning window" so it will be slightly easier to tune. All these differences are marginal and really can't be felt in the real world. But it does increrase power and performance slightly.
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RE: My new buggy!
Question, when is it needed and what does shimming do when you are running a higher percentage of Nitro.? I also see turbo head buttons listed a lot, what does that do for the engine?
Also nice buggy, very promising. |
RE: My new buggy!
ORIGINAL: mattster1971 Question, when is it needed and what does shimming do when you are running a higher percentage of Nitro.? I also see turbo head buttons listed a lot, what does that do for the engine? Also nice buggy, very promising. p.s. Yakfish, that is VERY interesting regarding your fuel tests. I've always wondered if anyone had ever conducted a test as such. |
RE: My new buggy!
There is a thin metal gasket/shim between the cylinder sleeve and the head button. Some engines require an extra shim to be placed under the head button to run higher nitro content fuels. Adding a shim reduces compression by adding volume to the combustion chamber which in turn lowers cylinder pressure and retards the ignition timing. In the case of high nitro content fuels this reduces the chance of detonation which is the fuel igniting before it is supposed to. Whatever power lost to reduced compression is made up by the higher nitro content in the fuel.
Turbo heads require turbo plugs. When installed they have a combustion chanber shape that is supposed to be more efficient and produce more power This is because the plug doesn't sit into the chamber obstructing the burn and flow like a standard plug. Instead it sits flush and helps form a smooth rounded shape in the chamber to help improve the burn and flow. Thats the theory, I've never tried to prove or disprove it. In my experience turbo plugs did seem to last slightly longer though. Edit: JohnP2 good call on the ignition timing, I missed that totally. And at first I thought you were referring to port timing, either way I had to edit my post. |
RE: My new buggy!
ORIGINAL: Maj_Overdrive Edit: JohnP2 good call on the ignition timing, I missed that totally. And at first I thought you were referring to port timing, either way I had to edit my post. |
RE: My new buggy!
nice pick up
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RE: My new buggy!
ORIGINAL: JohnP2 ORIGINAL: Maj_Overdrive Edit: JohnP2 good call on the ignition timing, I missed that totally. And at first I thought you were referring to port timing, either way I had to edit my post. |
RE: My new buggy!
No need to add extra shims to run 30% on the Macstar .28.
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RE: My new buggy!
really? Why do you say that? And what would be the result of shimming it a little thicker? Like .03 instead of .01. I have both sizes.
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RE: My new buggy!
I haven't owned a nitro Losi, but I've gone head to head with them against my Tekno conv. 8ight, and I was impressed how well they did box stock.
When you are ready to upgrade, I've heard many local racers praising the Ryan Lutz Alpha engines like no other. They seem to work very well, too, from I've seen<br type="_moz" /> |
RE: My new buggy!
ORIGINAL: mattster1971 really? Why do you say that? And what would be the result of shimming it a little thicker? Like .03 instead of .01. I have both sizes. |
RE: My new buggy!
ORIGINAL: Anthoop ORIGINAL: mattster1971 really? Why do you say that? And what would be the result of shimming it a little thicker? Like .03 instead of .01. I have both sizes. Andrew... How is the new buggy running? I have been looking for a vid from you guys with it running. How do you like it in comparison to your Hyper 7? Thanks... |
RE: My new buggy!
ORIGINAL: mattster1971 So you say it won't hurt anything but in the previous sentence you said it will give less performance. So increasing the shim will degrade performance? Will it have any benefit? Why is increased shimming sometimes warranted, why did I hear increase in the nitro methane percentage requires increased shimming? Thanks.. Thinking more about the performance thing now- if you could adjust the compression ratio without altering the squish clearance then, higher compression will give more torque and less compression will give more rpm. However unless you are making your own head buttons you are stuck with shims. Here is an article on squish (if you were wondering) http://www.rcboat.com/cr.htm An engine will have a compression ratio that is suited to a range of nitro percentage, if the compression ratio dictates that 25% would be the maximum you could run then you would need to lower the CR to run 30%. I have found that the Macstar will run 30% without any alteration, it may run 35% without...I do not know. You could start up a thread...we have gone pretty off-topic.;) |
RE: My new buggy!
ORIGINAL: mattster1971 Andrew... How is the new buggy running? I have been looking for a vid from you guys with it running. How do you like it in comparison to your Hyper 7? Thanks... |
RE: My new buggy!
ORIGINAL: Nitro Andrew ORIGINAL: mattster1971 Andrew... How is the new buggy running? I have been looking for a vid from you guys with it running. How do you like it in comparison to your Hyper 7? Thanks... |
RE: My new buggy!
nice buggy bud!!!....Love the paint scheme
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