Posts by Cameron Roberts

    Interesting fresh topic @Cameron Roberts so just for clarity are you wanting a higher top speed in first gear before you shift ? If this is the case the front pulley size would have to be increased and the rear decreased. And @JimM has a good point on this not working well with the NA Slings. And I believe as soon as we get the rear tire to hook we will start seeing clutch problems but it would be worth it to me. Anything to get it to hook would be great.


    Yes. I would like to see 1st stretch to 25 mph or so. 2nd to say 70. Of course it's all ratio and linear.

    Agree no failures but also may be due to some complaints of belts jumping teeth on sprocket or clutches slipping in turbos upper boost levels. These maybe the built in safety features. As we remove or improve those areas we may see other issues start to rise. That is what makes this all so fun.


    I'll be happy to test out a rear ratio swap. Especially since a cnc rear pulley would be so much lighter than the current one.

    Very good, but I would think and am probably wrong on this. But if you increase traction that we are all trying to achieve and then technically lower the ratio and increase the torque or power from a stock stand point would think something would give. Example would be you have a bolt put socket/ratchet on and torque and 6ft pipe and torque again with all you got something gonna give. Bad senerio I know but same principle. Hard to believepolaris built it that stout.


    I agree. To my knowledge I haven't heard of any angle drives failing or belts snapping. It's possible they used robust parts since they're used to making off road vehicles. I know a few angle drives have had issues, but most failed with no additional power. Just bad parts.

    @Turbosling could give the professional answer on this but I would say yes. Probably significant stress if leaning on it very hard. May find weakness in driveline past the clutch. Again as always dependant on traction. Which is a problem so driveline maybe safe. Who wants to find out first. @Tango will probably be the one to answer the weakness if it stays stock and he can find any kind of traction.


    Tango had a new clutch and transmission. He'll be contending with traction issue for sure!

    The problem in this situation is the clutch. We are still spinning the tires not as hard on clutch bit on street would definitely need upgraded clutch.


    So changing that ratio would add significant stress to the clutch? If I hit the point where the clutch is needing to be replaced then I'm replacing the engine.

    I think he's missing the point completely. We aren't here to "hurt" or "take down" the other forum. We are here because we love the slingshot and want a place to discuss ideas and plan get togethers without having an issue with nazi overlords. In that respect the forum matters quite a lot. It means a lot to me and I expect quite a few others here.

    Cam I believe it would be the other way around. As in our race bikes and quads we drop a tooth in the front to get more bottom end if that is not enough for 300 ft drags we will increase the teeth on rear sprocket a couple also. But yes if you could get a machine shop to make one I don't see why this wouldn't work. Just don't do on an N/A motor damn thing would lay down on you in third gear. Great idea for turbos.


    Exactly! First is just silly. You're shifting to second at around 10mph. Second would really benefit as well as its very easy to spin it. Third could be taller as well and no one really cares about fourth and fifth. Haha

    This is going out to the brains here. Would you be able to lengthen the gearing a bit by going with a smaller gear at the right angle drive and a bigger pulley at the rear wheel? How hard would that be? Any unforeseen issues that might arise? Extending first, second, and third would really help on the traction issues and make for much easier acceleration.

    I think the next thing to start to be an issue over 14 psi is going to be fuel delivery. Forged rods, Pistons and SS valves on stock sleaves should handle 14 psi all day. As long as bobs 2 bar tune is solid enough it should be good.


    I think most guys who blew their engines blew it because they have been made to believe that a stock Le9 can handle 267 hp no problem, but I have guys local to me who told me that is far from realistic. I have been told rods at 250 hp start to break, and pistons passed 210 are an issue under boosted application. Ring gap is not set for boost and it's too tight. The more I learn about the details, the more I am happy to be tearing my engine appart and building it properly.


    Wow. 210 is hardly worth bothering with. You could probably get there or close to there naturally aspirated.