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Old 05-22-2018, 08:11 AM
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Question 2018 M8000 DSI MAX BOOST PRESSURE

l am designing a turbo for a 2018 Mountain Cat DSI and I am looking for some data on max boost pressure short of internal parts becoming external parts.

Last edited by FASTTRACKS; 05-22-2018 at 11:02 AM. Reason: Clarification
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Old 05-22-2018, 09:19 AM
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Originally Posted by FASTTRACKS View Post
l am designing a turbo for a 2018 Mountain Cat DSI and I am looking for some data on max boost pressure short of internal parts becoming external parts.
Is this for personal use or are looking to make a kit you can sell to the public? IMO, 90% of consumers arenít ever going to run anything more than a pump gas set up. Assuming a splash of 110 is needed with most pump gas kits running 5-7ish lbs. On full race gas Iíve seen guys run up to 12-14lbs. With the right turbo, inter cooler, fuel, etc you could run more, but why. Although that much boost is a riot in open bowels and chutes, itís not real
practical to ride as a dailey ride. Itís just not needed in the type tree/boondocking most guys do these days.
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Old 05-22-2018, 11:11 AM
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Quote:
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Is this for personal use or are looking to make a kit you can sell to the public? IMO, 90% of consumers arenít ever going to run anything more than a pump gas set up. Assuming a splash of 110 is needed with most pump gas kits running 5-7ish lbs. On full race gas Iíve seen guys run up to 12-14lbs. With the right turbo, inter cooler, fuel, etc you could run more, but why. Although that much boost is a riot in open bowels and chutes, itís not real
practical to ride as a dailey ride. Itís just not needed in the type tree/boondocking most guys do these days.
What's it like riding in the bowels? Sounds like fun!

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Old 05-22-2018, 11:19 AM
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I am thinking 7 lbs with the capability of 10 lbs. I want to keep the max boost level south of when things start coming apart. Just trying to determine a safe max boost level. Thanks for the input.
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Old 05-22-2018, 11:28 AM
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You can run 7-10# with ease assuming a good state of tune. good intercooling/turbo selection to keep charge temps down will ensure a lot more longevity out of things like reeds.
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Old 05-23-2018, 11:26 AM
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I am thinking 7 lbs with the capability of 10 lbs. I want to keep the max boost level south of when things start coming apart. Just trying to determine a safe max boost level. Thanks for the input.
Never answered if this was for yourself or for customers
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Old 05-24-2018, 08:27 AM
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Building a couple Turbos for me and my son
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Old 05-24-2018, 06:05 PM
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It all depends on fuel. I have been running the DSI between 5 and 12 pounds of boost for a couple seasons. They rip at 7 or 8 pounds and that is sufficient for most. I recommend 50/50 or 100 LL at 5-9 and at 10 or more run 75/25.

If you keep the octane sufficient for your boost your motor will last.
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Old 05-27-2018, 10:21 AM
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What's it like riding in the bowels? Sounds like fun!

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Lots of twists and turns but watch out for the surprises.
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Old 05-30-2018, 10:21 AM
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what altitude you at racing station? and on stock head or low compression head?
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