spurdy Posted January 20, 2013 Report Posted January 20, 2013 The one I have is rounded just like what yours looks like. The tract looks to be the same length too. Maybe mine is older or newer or something but it look smuch the same as that one. SP Quote
thekevin Posted January 20, 2013 Report Posted January 20, 2013 I am really considering a swap like this for my trail bike. If you are running a 33 on your stock bike what size carb would I need for an 80 over 4mm motor. Sent from my Galaxy Nexus using Tapatalk 2 Quote
spurdy Posted January 21, 2013 Report Posted January 21, 2013 I am really considering a swap like this for my trail bike. If you are running a 33 on your stock bike what size carb would I need for an 80 over 4mm motor. Sent from my Galaxy Nexus using Tapatalk 2 An 0.080" over motor isn't gonna require any different fuel delivery system and neither would a 4mm stroker. I wouldn't run anything over a 35mm carb on most stock cylinder set ups on gas. SP Quote
thekevin Posted January 21, 2013 Report Posted January 21, 2013 I assumed an extra 50cc worth of displacement would need quite a bit more fuel and air. If I can make it work with a 33 that's great, they seem like they are easy to come across good ones. Sent from my Galaxy Nexus using Tapatalk 2 Quote
spurdy Posted January 21, 2013 Report Posted January 21, 2013 I assumed an extra 50cc worth of displacement would need quite a bit more fuel and air. If I can make it work with a 33 that's great, they seem like they are easy to come across good ones. Sent from my Galaxy Nexus using Tapatalk 2 The 33 will work, a 35 would be better and depending on the porting and set up, considering what type of riding a 39 may even work. SP Quote
hp2000 Posted January 21, 2013 Report Posted January 21, 2013 I was running this one on a ported 350 motor. 64.00mm compression at 150psi timing +5 38mm PWM Manifold from Bobs manifolds in Yucaipa Ca. Up for sale lmk Quote
thekevin Posted January 21, 2013 Report Posted January 21, 2013 I am all trail riding now. I want whatever is going to give me the best throttle response and best low to mid range performance. Quote
thekevin Posted January 21, 2013 Report Posted January 21, 2013 Oh, and no port work that I know of. I bought it the way it is. Quote
hp2000 Posted January 21, 2013 Report Posted January 21, 2013 I ran a 35mm one before and it seemed to not pull to well on the top for me. going with the 38 fixed all that and didn't loose low or mid. Quote
Paulie B Posted January 21, 2013 Report Posted January 21, 2013 I just don't get how it works. I'm not knocking you guys running them. I understand it helps the low-end. Is it the longer intack tract? Quote
trickedcarbine Posted January 22, 2013 Report Posted January 22, 2013 Again, many twin snowmobile engines much larger then our banshees have done very well on a properly 2/1 intake. The majority of banshee 2/1 intakes have a huge choke point where the air is decided since many of them are designed to be short enough to still use the air box if needed. Quote
BigRed350x Posted January 22, 2013 Report Posted January 22, 2013 Keep in mind a lot of snowmo engines are set up with the belt drive to hold engine rpm close to where max torq is produced, which is generally a lower rpm number. Banshee engines have a trans not a belt drive and in most cases need to utilize the upper rpm range, which is where the 2into1 falls off. Just because it works for one application does not mean it will work in others. It is well proven by quite a few different people in different applications that 2 smaller carbs out-perform 1 single carbs with a 2into1 intake system. Jared Quote
trickedcarbine Posted January 23, 2013 Report Posted January 23, 2013 Hmm. Right on Jared. I always thought it was the Peak HP on sleds. Got my hamster running the wheel now. Quote
Dmx Posted January 28, 2013 Report Posted January 28, 2013 If you are serious about the swap, do it with an old 440 exciter manifold. Takes a little modding but it's like a single plane manifold for your big block. It works, but it requires a 39mm carb or bigger. Any info on what kind of modding this exciter intake needs to fit cylinders? This the same one? http://www.ebay.co.uk/itm/71-YAMAHA-SS433-EXCITER-440-AUTOLUBE-INTAKE-MANIFOLD-/110893765502?pt=Snowmobile_Parts_Accessories&hash=item19d1c8937e Quote
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