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+--- Thread: Mazda RX7 Generations.. (/showthread.php?tid=1868)
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Mazda RX7 Generations.. - toxo - 21-10-2017
Yeah, they're both 13B rotary engines but that's about where the similarties end. It's like saying that a 1G-GTE MK3 supra and a 1G-FE IS200 have the same engine. The 7 has sequential twin turbos where the 8 doesn't as well.
They must be pretty confident because they extended the warranty on the RX8 to 8 years to 100,0000 miles.
Mazda RX7 Generations.. - Bobby - 21-10-2017
Please stop talking about engine failures & rebuilds on RX8's
cared:cared:cared:cared:
Mazda RX7 Generations.. - steviewevie - 21-10-2017
toxo Don't forget that they drink oil because they're meant to, it's not the engines failing that causes it. They just have rpm-activated oil squirters, same as the later Supra TT's and the supercharged Levins.I don't know much about rotary engines, but surely having rpm-activated oil squirters just means the oil is moved around differently ? Oil is only going to disappear if it leaks out or it's burnt ?
Mazda RX7 Generations.. - toxo - 21-10-2017
Well yeah, the injectors inject into the combustion chamber so it gets burnt.
Mazda RX7 Generations.. - steviewevie - 21-10-2017
toxo Well yeah, the injectors inject into the combustion chamber so it gets burnt.
The oil squirts directly into the combustion chamber ? Well, that would certainly explain it drinking oil ! :ohmy:
Mazda RX7 Generations.. - toxo - 21-10-2017
The problem is inherent to the design of the rotary engine, they don't have a combustion 'chamber' as such, and the area where the combustion takes place changes in size and shape through the rotation of the rotor. This makes for a very complicated sealing system, and when people talk about the engines blowing up 9/10 it's the seals that have gone (they are a service item). So they throw loads of oil into the mix to try and keep everything lubricated and sealed up, and some of it gets burnt off.