charge tube heat
- Thread starter meakin46
- Start date
Charge temps on an M8 with 2871R turbo at 10 psi of boost running 7700 RPM calculate out to be about 145 degrees. In actuality they are more around 170.
Your charge tube might get hotter than this if you've got a lot of heat radiating off of your pipe.
Is this enough to melt wires? That depends on your wires! I havent had a problem, but i've never routed wires close to the charge tube. I have had them close to the crank cases (resting on them) and never had a problem with melting. I think crank temps are hotter than charge tems, unless you've got a lot of radiant heat coming off yor pipe hitting your tube.
Your charge tube might get hotter than this if you've got a lot of heat radiating off of your pipe.
Is this enough to melt wires? That depends on your wires! I havent had a problem, but i've never routed wires close to the charge tube. I have had them close to the crank cases (resting on them) and never had a problem with melting. I think crank temps are hotter than charge tems, unless you've got a lot of radiant heat coming off yor pipe hitting your tube.
If your coolant hoses won't melt the wires neither will the charge tube.
Typical wiring insulation has a working temp of 257 degrees. Thats working temp. Actual melt temp is much higher.
Keep it away from abrasion and your pipes and it will be fine.
Typical wiring insulation has a working temp of 257 degrees. Thats working temp. Actual melt temp is much higher.
Keep it away from abrasion and your pipes and it will be fine.
B
badass1000
Well-known member
"in actuality they are closer to 170 degrees"
Have you actually used a temp probe or something else to check the charge temps?
Sorry for the confusion, my post was definitely lacking. The calculated theoretical temps are around 140 assuming 32 degree intake air and no other heating other than the effect of compressing the air. This is a good thermodynamic calculation with which I have good confidence in, if there were no other outside heat sources beyond the actual compressing of the air.
In actuality, heat gets transferred from the turbine housing to the compressor housing, radiant heat from the pipes and engine heat the charge tubes putting heat into the intake air, and most turbo's suck air from under the hood that is much hotter than 32 degrees. My 170 degree figure was calculated from trying to calculate that as best as I can (lots and lots of assumptions and really different for all different setups.)
I have an intake air temp sensor on order, but its backordered. I am also installing a water to air IC in the next couple of days.
Hopefully with all that i'll be able to get some good solid concrete data on intake temps, effects of water to air IC's and effects of cold air intakes. Hopefully after all this messing around with my machine i'll still be married...
Hopefully all of this work will be worth it...
Hopefully people are still around on the forum to find out after reading the long PM I just read...
In actuality, heat gets transferred from the turbine housing to the compressor housing, radiant heat from the pipes and engine heat the charge tubes putting heat into the intake air, and most turbo's suck air from under the hood that is much hotter than 32 degrees. My 170 degree figure was calculated from trying to calculate that as best as I can (lots and lots of assumptions and really different for all different setups.)
I have an intake air temp sensor on order, but its backordered. I am also installing a water to air IC in the next couple of days.
Hopefully with all that i'll be able to get some good solid concrete data on intake temps, effects of water to air IC's and effects of cold air intakes. Hopefully after all this messing around with my machine i'll still be married...
Hopefully all of this work will be worth it...
Hopefully people are still around on the forum to find out after reading the long PM I just read...
B
badass1000
Well-known member
jgw50
thank you for the info. I am very interested in all of your findings.
Have you ran your sled without the w/a intercooler? I am also interested in hearing if their is much difference in throttle responce with and without the intercooler. w/a intercoolers are supposed to have alot less pressure drop and are alot more free flowing then a/a intercoolers if the w/a has the correct core in it. Like only .1-.2psi pressure drop across the core.
thank you for the info. I am very interested in all of your findings.
Have you ran your sled without the w/a intercooler? I am also interested in hearing if their is much difference in throttle responce with and without the intercooler. w/a intercoolers are supposed to have alot less pressure drop and are alot more free flowing then a/a intercoolers if the w/a has the correct core in it. Like only .1-.2psi pressure drop across the core.
