failures after tuning

[zenk]

Can anyone tell me whats most commonly failing after running a tune

 

[scotts]

The expectation of the tune!

 

[Lem Lamb]

Not tuning it right and starting over from scratch,,, there are lots and lots of things that can wrong...

 

[lilduke]

The motor. Lol

 

[zenk]

Not tuning it right and starting over from scratch,,, there are lots and lots of things that can wrong...

I mean more so like other parts failing. I think i read people were having the charge tube cracking after a tune. Im trying to figure out what i should replace after doing a tune to get my sled to 180hp. i have pretty decent knowledge of turbo systems and getting an additional 20hp equates to roughly 2-3 psi of increased boost. increasing the pressure by 2-3psi should not cause that rubber charge tube to crack.

My point of the question is, i know alot of people have tuned their factory turbos. if people list the failures they had, the more common ones between people would be where to start. I hear most people are having the best luck with Muptun

 

[Bnorth]

I mean more so like other parts failing. I think i read people were having the charge tube cracking after a tune. Im trying to figure out what i should replace after doing a tune to get my sled to 180hp. i have pretty decent knowledge of turbo systems and getting an additional 20hp equates to roughly 2-3 psi of increased boost. increasing the pressure by 2-3psi should not cause that rubber charge tube to crack.

My point of the question is, i know alot of people have tuned their factory turbos. if people list the failures they had, the more common ones between people would be where to start. I hear most people are having the best luck with Muptun

I would guess that that an additional 2-3 psi is pushing the compressor near the edge of its efficiency and the extra heat + pressure is causing the crack.

 

[zenk]

I would guess that that an additional 2-3 psi is pushing the compressor near the edge of its efficiency and the extra heat + pressure is causing the crack.

Thats fair. But, the new gen 5 is running all the same parts(turbo, intake and charge pipe) as the gen4. All the changes from gen 4 to 5 did not include anything engine/turbo related beside boost pressure and timing.

 

[Bnorth]

Thats fair. But, the new gen 5 is running all the same parts(turbo, intake and charge pipe) as the gen4. All the changes from gen 4 to 5 did not include anything engine/turbo related beside boost pressure and timing.

That's interesting I didn't know that. I would have expected at least revised charge piping to fit the chassis.

 

[zenk]

That's interesting I didn't know that. I would have expected at least revised charge piping to fit the chassis.

I am wrong. The charge pipe is different. After reading more into it, it says they charge tube is thinner then on the gen4. Thge intake tube is also different but that would be because the whole intake system is different.

 

[maxwell]

charge tube and drivers.

Other than that just catastrophic nuclear engine and turbo failure

 

[lilduke]

Get some silicone charge tubes, and crank it up

 

[oler1234]

Having manually tuned mine there are a lot of function you can alter on the stock ECM. if you don’t really know what your changing or its effects then you’ll see posts like this. Furthermore the manufacture of the software constantly is evolving and keep providing updates. Last year there were 3 updates and new abilities for tuning.

So really you need to understand the big picture and be up to date with your software.

Simple cranking boost up without altering the target fueling table will work but not long term. A lot of ‘toons’ out there doing and selling a product like this.

Some change the rpm x acceleration table, bad idea this was really set in place for blowing belts

Timing is another quick one

Removing safeties pre-set

Changing oil consumption

Boost x elevation scaling factor

Bla bla bla, list can go on for a long time.

My advice, if you can afford to fix it, then dont modify it!

 

[jcjc1]

i couldn't find the vid but when brp did the gen5 turbo r release, one of the clips had all the chassis/engine changes and i remember something about the cylinder head. maybe it was increased cooling.

 

[greenthumb]

i couldn't find the vid but when brp did the gen5 turbo r release, one of the clips had all the chassis/engine changes and i remember something about the cylinder head. maybe it was increased cooling.

 

[jcjc1]

thanks. revised head, new injectors, fuel rail...

 

[Bnorth]

Having manually tuned mine there are a lot of function you can alter on the stock ECM. if you don’t really know what your changing or its effects then you’ll see posts like this. Furthermore the manufacture of the software constantly is evolving and keep providing updates. Last year there were 3 updates and new abilities for tuning.

So really you need to understand the big picture and be up to date with your software.

Simple cranking boost up without altering the target fueling table will work but not long term. A lot of ‘toons’ out there doing and selling a product like this.

Some change the rpm x acceleration table, bad idea this was really set in place for blowing belts

Timing is another quick one

Removing safeties pre-set

Changing oil consumption

Boost x elevation scaling factor

Bla bla bla, list can go on for a long time.

My advice, if you can afford to fix it, then dont modify it!

What are you tuning with?

 

[ctd]

Having manually tuned mine there are a lot of function you can alter on the stock ECM. if you don’t really know what your changing or its effects then you’ll see posts like this. Furthermore the manufacture of the software constantly is evolving and keep providing updates. Last year there were 3 updates and new abilities for tuning.

So really you need to understand the big picture and be up to date with your software.

Simple cranking boost up without altering the target fueling table will work but not long term. A lot of ‘toons’ out there doing and selling a product like this.

Some change the rpm x acceleration table, bad idea this was really set in place for blowing belts

Timing is another quick one

Removing safeties pre-set

Changing oil consumption

Boost x elevation scaling factor

Bla bla bla, list can go on for a long time.

My advice, if you can afford to fix it, then dont modify it!

I'm curious the software, you are getting access to a lot of tables, scanner is critical.

HPT does not list Ski Doo unless things have changed. MapTun really limits critical table access, their canned tune files run well.

 

[oler1234]

torq-link. I got a copy of there software and patch cables. Typically only for dealer stuff. There is not scanner, we are tuning with a laptop.

Interesting to note, G4T has less boost but more timing. G5T has more boost but less timing especially in the 6000rpm range, go figure.

 

[zenk]

What are you tuning with?

All I’m doing is taking the sled to Riderz and having the maptun stage 1 installed as well as Joey’s Ibackshift kit with his ramps.