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Hurricane knock light bulletin

HURRICANE

TY Advertiser
Vendor
Joined
Oct 17, 2007
Messages
2,092
Location
Prescott Ont.
Website
www.hurricaneperformance.ca
It’s now been 3 years since Hurricane Performance created the knock detection and protection system in conjunction with gap engineers while tested by TD. There have been many cases where the knock light will flash while fuelled with the correct octane for the Hurricane flash. Rather then lowering the Hurricane knock sensitivity to put the knock light out as well as lowering the engine protection, we have worked with many of Hurricane dealers and customers to find there individual issue.
Now we have had enough history to establish a trend in the cause of many premature Hurricane knock cases . It’s ALWAYS boost leaks! They can be hard to find. The trend that we are seeing though is that the throttle body boots are leaking on many sleds. This leak often takes up to 24lbs pressure applied to the induction system to diagnose. While the stock clamps are tight, they need to be modified to allow an additional tightening.
We are recommending to all 998 sled owners to tighten the clamps beyond the oem limit.
 

fatchance

Lifetime Member
Joined
Sep 16, 2005
Messages
1,482
Location
Ma.
Thanks for posting Dave. You just confirmed my suspicion of a boost leak. Been seeing my boost pressure spike/dip lately even after tightening all the hose clamps. Possibly a break in the charge tubes somewhere.
 

RAMSOMAIR

TY 4 Stroke Master
Joined
Nov 2, 2006
Messages
1,299
Location
Ontario, Canada
It’s now been 3 years since Hurricane Performance created the knock detection and protection system in conjunction with gap engineers while tested by TD. There have been many cases where the knock light will flash while fuelled with the correct octane for the Hurricane flash. Rather then lowering the Hurricane knock sensitivity to put the knock light out as well as lowering the engine protection, we have worked with many of Hurricane dealers and customers to find there individual issue.
Now we have had enough history to establish a trend in the cause of many premature Hurricane knock cases . It’s ALWAYS boost leaks! They can be hard to find. The trend that we are seeing though is that the throttle body boots are leaking on many sleds. This leak often takes up to 24lbs pressure applied to the induction system to diagnose. While the stock clamps are tight, they need to be modified to allow an additional tightening.
We are recommending to all 998 sled owners to tighten the clamps beyond the oem limit.
How do you modify the stock clamps??
 

yamamarc

VIP Member
Joined
Sep 29, 2013
Messages
3,057
Location
Massey Ontario
Country
Canada
Snowmobile
2019 zr9000 Ltd
How does a boost leak cause knock?
I just got off the phone with Dave to get more info!!
He is talking about the clamps on the back side of the throttle body!!
You need to remove the clamp and shave about 1/16" of the stopper to allow the clamps to tighten up more!!!

From what I understand what happens is if a leak is in this area the turbo will spin faster to keep pressures at par with the tune requirements and will cause knock!
 


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