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TD MS17 with Gen 1 header. Boost pressure?

Woody255

Extreme
Joined
Apr 19, 2016
Messages
60
Age
44
Location
NW ON
Country
Canada
Snowmobile
Vmax4's
Hi all, I have the TD Max Spool 17, and added the TD Gen 1 header, with updated header map. I’m running the 3 bar, with 3” exhaust. What boost pressures are you seeing with MS17, with the header? Thanks
 

Dont have an exact number for you but Im gonna guess and say 17-17.5psi. Without the wastegate upgrade with advanced tuning the wastegate will open early because of the increased flow from the header. If your boost is down a bit from what you previously saw with stock manifold that is normal.
 
Thanks Justinator,

I assumed the header would reduce boost by up to 2-3psi. Long story short, I bought the sled in the summer, and added a CAI, 3” exhaust, header, closed loop, fuel pump and regulator prior to running it. I did update the tunes with the header/CL at the same time.
When I finally ran it on Friday, I was at 14.5-15.0psi on MS17. After a closer inspection, I found one of the clamps on the intake tubes to be completely off the boot and was snug around the TB…it appeared to come from factory that way. After repairs, I ran it yesterday and was immediately up to running 17.8-18.2 consistently. Problem solved!
 
What horsepower does TD claim your tune to be with the header?
 


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