Halltech StingerCKN Problem-Fix
Thread Starter
Supporting Vendor
Joined: Mar 2002
Posts: 13,099
Likes: 672
From: Bristol, Tennessee
St. Jude Donor '09
Halltech StingerCKN Problem-Fix
We just installed our StingerCKN after a 1200 mile inspection, took our car to the car wash to get the Michigan snow off the fenders. I noticed our long term fuel trims hitting lean code territory.
What the hell? We typically see +.8 to +2% LTFTs so I immediately thought huge air leak, but where? First look the connector hose to the tiny throttle body had an open area that looked like a mouth ready for oral surgery. A huge gap caused by the hose being .250" too big at the i.d.
We have delivered 10 or so intakes, so Monday, we have our original 3.75" X 4" hump connector hose going out to replace the larger hump hose.
Jim Hall
What the hell? We typically see +.8 to +2% LTFTs so I immediately thought huge air leak, but where? First look the connector hose to the tiny throttle body had an open area that looked like a mouth ready for oral surgery. A huge gap caused by the hose being .250" too big at the i.d.We have delivered 10 or so intakes, so Monday, we have our original 3.75" X 4" hump connector hose going out to replace the larger hump hose.
Jim Hall
__________________
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
423-915-6056
For service email:
orders@halltechsystems.com
www.halltechsystems.com
"World Class Performance for your Corvette"
Intake Design and Engineering since 1999
Halltech Systems, LLC
423-915-6056
For service email:
orders@halltechsystems.com
www.halltechsystems.com
Thread Starter
Supporting Vendor
Joined: Mar 2002
Posts: 13,099
Likes: 672
From: Bristol, Tennessee
St. Jude Donor '09
Thanks,
Current orders were caught in time, so no changes if you have not yet received you system.
After retesting fuel trims today, all lean issues are resolved with the change in connector hose. I would expect +14 RWHP without tuning. The hose was leaking under maximum vacuum signal. Good thing we caught this.
Vengeance racing may find even more horsepower with the new hose. The problem is you cannot visually seen the opening since it is on the bottom of the hose to throttle body area. The new hose makes tuning completely unnecessary. That was the source of our occasional lean issue, and probably why adding a small amount of fuel back bumped the hp on our two test vehicles.
Current orders were caught in time, so no changes if you have not yet received you system.
After retesting fuel trims today, all lean issues are resolved with the change in connector hose. I would expect +14 RWHP without tuning. The hose was leaking under maximum vacuum signal. Good thing we caught this.
Vengeance racing may find even more horsepower with the new hose. The problem is you cannot visually seen the opening since it is on the bottom of the hose to throttle body area. The new hose makes tuning completely unnecessary. That was the source of our occasional lean issue, and probably why adding a small amount of fuel back bumped the hp on our two test vehicles.
Last edited by Halltech; Jan 19, 2014 at 07:57 PM.
