I've installed a couple of kit's now and have found some interesting (to me anyway) fueling characterisitcs of the Fix Kit with the 08 head combo versus the 2010 Update combo. The huge mid-range fueling that the 2010 update needed to prevent mid-range driveability issues is not consistent or necessary IMO with the fix kit and 08 head.
I have to say that I was very leary about using Wiesco's especially in a motor that is very prone to the widely discussed "Cold Shot" issues. I wanted to run the Terra Alps kit that uses a Suzuki cast piston and billet head but couldn't seem to get my hands on the product.
Here's a few pics of the in-house Polaris Tech taking pride in her work.
I have been running a PCV, Koso EGT's and AFR on this sled for 2 years prior to this season. I added both after the first ride of the sled being new. The mid range and tip-in throttling was horrible and dangerous. You could not stand up and ride the sled without going over the bars. After adding the PCV, the mid-range runnability was improved 250% however, the exhaust temps were always off the chart. Even after adding more fuel in the mid than what SLP's PCV map and dynotech's did, I could still never get the mid temps and AFR's ratio to ever be what I feel were "SAFE".
With the 2010 update on my sled, you could not hold the throttle for more than 2-3 seconds in that light throttle mid-range area without the temps going to 1,350-1,400 plus degrees (and continue to climb) and the AFR going to 18-20:1. I could add so much fuel that the engine would gargle and blubber and in fact rich bog out and die.
The other thing that didn't seem normal was EGT's at idle would always be about 550'-625' F. I could add more fuel to the PCV and temps wouldn't change. Even to the point of stalling the motor.
I even tried subtracting fuel in these areas as sometimes too much fuel can cause high temps and burn in the pipe. No change in temps would ever occur.
I decided to keep all of the mapping in the ECM and PCV the exact same and tune from there. I know many recommeneded going with the 08 mapping but I remembered back in 08 and 09 some had to add a splash of race fuel to fend off deto back in the early days of the 800 CFI and didn't want to have to doo that. I also like to do things in steps to try and get clear and concise data.
After teardown and inspection at 600 miles on mine and 400 miles on my customer's, both had hairline cylinder skirt cracks (mag side) and mine had nicasil delamination. Both are 2009's. I would recommend anytime the stock pistons are replaced, to replace the monoblock.
Very small crack, look at the line about .5" beyond the tip of the pick
Notice the delamination of the nicasil
My in-house Polaris tech and I installed the Fix kit with an 08 head, SLP pipe/can and running the 2010 Update map, (1st) with yellow injectors, and running the Stoutner 162 map as it was before.
Now at idle, the EGT's are running between 350'-425'F depending on coolant temp.
Now at steady light throttle mid-range throttle position, EGT's are 950'-1150'F after 4-5 seconds and go to about 1275' after 10 seconds.
Full throttle EGT's are about 100' Cooler. After about 5-10 seonds, temps are about 1125'-1175'F. Before the work they would be about 1,250'ish.
I find this very interesting. Of course this is ONLY 1 SLEDS' RESULTS. It leaves me with a few questions...
How much of an effect is the 08 head having on these results?
How much of an effect is the Fix Kit having on these results?
I removed my AFR gauge so I don't have any AFR results but I am guessing they will parallel the EGT's. Sled is pulling 64 grams and running 8,350 R's at 4,500-5,500 ft. so I need to add a little there. Before it only pulled 62 grams at 8,000 R's. I am thinking the top end could be trimmed down a little on fuel but I am pretty happy with how it's pulling. The fix kit definately has a little more torque in the deep stuff than the 2010 update has.
As for the Cold Shot issue, I have found that drilling an additional bypass hole the same size as the factory hole 180' degrees in the thermostat has made a huge improvement on the drastic coolant temp swings after engine restart. This is something that Carl's cycle was doing to their 860's back in 08 and 09 and where I got the idea from.
I have to say that I was very leary about using Wiesco's especially in a motor that is very prone to the widely discussed "Cold Shot" issues. I wanted to run the Terra Alps kit that uses a Suzuki cast piston and billet head but couldn't seem to get my hands on the product.
Here's a few pics of the in-house Polaris Tech taking pride in her work.
I have been running a PCV, Koso EGT's and AFR on this sled for 2 years prior to this season. I added both after the first ride of the sled being new. The mid range and tip-in throttling was horrible and dangerous. You could not stand up and ride the sled without going over the bars. After adding the PCV, the mid-range runnability was improved 250% however, the exhaust temps were always off the chart. Even after adding more fuel in the mid than what SLP's PCV map and dynotech's did, I could still never get the mid temps and AFR's ratio to ever be what I feel were "SAFE".
With the 2010 update on my sled, you could not hold the throttle for more than 2-3 seconds in that light throttle mid-range area without the temps going to 1,350-1,400 plus degrees (and continue to climb) and the AFR going to 18-20:1. I could add so much fuel that the engine would gargle and blubber and in fact rich bog out and die.
The other thing that didn't seem normal was EGT's at idle would always be about 550'-625' F. I could add more fuel to the PCV and temps wouldn't change. Even to the point of stalling the motor.
I even tried subtracting fuel in these areas as sometimes too much fuel can cause high temps and burn in the pipe. No change in temps would ever occur.
I decided to keep all of the mapping in the ECM and PCV the exact same and tune from there. I know many recommeneded going with the 08 mapping but I remembered back in 08 and 09 some had to add a splash of race fuel to fend off deto back in the early days of the 800 CFI and didn't want to have to doo that. I also like to do things in steps to try and get clear and concise data.
After teardown and inspection at 600 miles on mine and 400 miles on my customer's, both had hairline cylinder skirt cracks (mag side) and mine had nicasil delamination. Both are 2009's. I would recommend anytime the stock pistons are replaced, to replace the monoblock.
Very small crack, look at the line about .5" beyond the tip of the pick
Notice the delamination of the nicasil
My in-house Polaris tech and I installed the Fix kit with an 08 head, SLP pipe/can and running the 2010 Update map, (1st) with yellow injectors, and running the Stoutner 162 map as it was before.
Now at idle, the EGT's are running between 350'-425'F depending on coolant temp.
Now at steady light throttle mid-range throttle position, EGT's are 950'-1150'F after 4-5 seconds and go to about 1275' after 10 seconds.
Full throttle EGT's are about 100' Cooler. After about 5-10 seonds, temps are about 1125'-1175'F. Before the work they would be about 1,250'ish.
I find this very interesting. Of course this is ONLY 1 SLEDS' RESULTS. It leaves me with a few questions...
How much of an effect is the 08 head having on these results?
How much of an effect is the Fix Kit having on these results?
I removed my AFR gauge so I don't have any AFR results but I am guessing they will parallel the EGT's. Sled is pulling 64 grams and running 8,350 R's at 4,500-5,500 ft. so I need to add a little there. Before it only pulled 62 grams at 8,000 R's. I am thinking the top end could be trimmed down a little on fuel but I am pretty happy with how it's pulling. The fix kit definately has a little more torque in the deep stuff than the 2010 update has.
As for the Cold Shot issue, I have found that drilling an additional bypass hole the same size as the factory hole 180' degrees in the thermostat has made a huge improvement on the drastic coolant temp swings after engine restart. This is something that Carl's cycle was doing to their 860's back in 08 and 09 and where I got the idea from.
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