Exhaust Port Inserts???
#3
Yeah, shutup kid.
Leave them in. You would gain nothing at all by taking them out, and you'd increase exhaust temps.
Some race engines take them out, but that's cause it actually helps them since their exhaust ports are bigger than the sleves.
Some race engines take them out, but that's cause it actually helps them since their exhaust ports are bigger than the sleves.
#5
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I thought about pulling them to allow me more room for inspection of the apex seals (and to allow me to put a mirror into the hole so I could inspect the housing's). How hard is it to pull them out and put them back in while the engine is together?
#7
Absolute Power is Awesome
They are there to resist the eroding effects of hot, fast moving gasses traveling out of the exhaust port.
The exhaust port is typically the hottest part of the housing because the gasses traveling through are transferring a good deal of their heat to the surrounding metal. I can explain why if anyone cares.
They're made from a much harder steel than the housing to resist damage from these hot gasses and not allow the high temps to be transferred to the housing itself.
I don't know that removing them would damage anything in the short term, but long term, the concentrated heating of that area in the housing would eventually cause stress cracking or eroding. The condition would be even more extreme on a turbocharged car.
The exhaust port is typically the hottest part of the housing because the gasses traveling through are transferring a good deal of their heat to the surrounding metal. I can explain why if anyone cares.
They're made from a much harder steel than the housing to resist damage from these hot gasses and not allow the high temps to be transferred to the housing itself.
I don't know that removing them would damage anything in the short term, but long term, the concentrated heating of that area in the housing would eventually cause stress cracking or eroding. The condition would be even more extreme on a turbocharged car.
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