58mm TB with FCI - Yamaha Raptor Forum
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post #1 of 6 (permalink) Old 09-18-2019, 07:32 PM Thread Starter
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58mm TB with FCI

Would I see any significant gains from this mod? I already have a +3 TB with FCI.
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post #2 of 6 (permalink) Old 09-18-2019, 07:57 PM
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Depends on the rest of your build and where and how you ride. The +3 TB is good for up to 75-80 HP. You'll need compression, stroker, porting, big valves and HDD5050 big cam to get to 70 HP. To use a 58mm TB with that build may decrease low end torque and throttle response because of reduced velocity. It will also move your powerband into the higher RPM range. To make use of the 58TB you should have at least 14:1 compression, big bore or stroker, HDD5150 cam or similar and of course porting and valves. The 5150 is a race cam and a build with a 58mm would be considered a race build and require race fuel because of compression.
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'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.
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post #3 of 6 (permalink) Old 09-18-2019, 07:59 PM
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Also a FCI that fits a factory TB, including a +3 will not fit the 58mm TB.

'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.
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post #4 of 6 (permalink) Old 09-18-2019, 08:02 PM Thread Starter
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I'm at 73HP, with port and +1 valve job, HDD5050 Cam, no stroker and 11:1 Piston. Someone is selling me one and i wanted to know if it was worth considering.
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post #5 of 6 (permalink) Old 09-19-2019, 02:14 AM
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Quote:
Originally Posted by palvarez05 View Post
I'm at 73HP, with port and +1 valve job, HDD5050 Cam, no stroker and 11:1 Piston. Someone is selling me one and i wanted to know if it was worth considering.
Yes, you could try the bigger 58 TB but I don't think you'll like it. As said, it would be best with 14:1 compression, +2 valves, maybe big bore or stroker, and race fuel. And your existing FCI won't fit.
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'19 Can-Am X3, RS Turbo, 172 HP, 1300x15 STU #2 paddle, Tribute front, DynaTec controller, cat delete, GTP blow off valve, custom flame wrap, Bent Metal windshield, Blazer wiper, rear window, 48in LED light bar, 14in LED light bar, GTP LED side lights, S3 shock tower brace, aluminum rear pull plate, 5K Badlands winch, dual batteries, 5ft lighted whips, Rugged radio and intercom, interior lights, rock lights, chase lights, over $200 additional switches, YES, street legal with dirt tires.
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post #6 of 6 (permalink) Old 09-20-2019, 02:46 PM
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You’re at that level where the +3 and 50mm are both viable. The 54mm supports 100hp so there is no reason to put a 58mm on your current build.
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