8 months and counting with no blowoff valve
#276
1.3L piston eater
ran no bov on a few of my rx7s for quite some time and on a 1J motor and had noticebly faster spool on all , no problems arose, deciding if i want to run no bov on my new setup (S475)
#277
Eats, Sleeps, Dreams Rotary
iTrader: (52)
Starting again with a fresh CHRA and billet wheel. Still planning to run no BOV so we will see where she goes.
#278
Old [Sch|F]ool
most logical that i worked as a factory tech for a decade.
most logical that i haven't used a blowoff valve for about the past 3 years with no problems. neither have most of the people posting in this thread who aren't running blowoff valves and have properly running setups.
there's so much BS in this thread that it started to stink many pages ago.
most logical that i haven't used a blowoff valve for about the past 3 years with no problems. neither have most of the people posting in this thread who aren't running blowoff valves and have properly running setups.
there's so much BS in this thread that it started to stink many pages ago.
Turbo life increased dramatically when watercooling became common. The old turbos died from oil coking because the bearings would run 300-400-500F (going UP after shutoff) while watercooled housings rarely if ever get significantly over coolant temp, even after engine shutoff. No oil coking = turbos don't puke the bearings after 50k like was practically expected in the 80s.
#280
Senior Member
jesus more idiots than i remembered in here, almost worse than Tech
if you honestly think the thrust bearing on a journal bearing turbo doesn't see any ill from the stalling you are on crack
the thrust is loaded pushing towards the compressor under normal conditions, let it bark and the thrust vibrates loading one side of the thrust then to the other
plus the radial load placed on the shaft
if you honestly think the thrust bearing on a journal bearing turbo doesn't see any ill from the stalling you are on crack
the thrust is loaded pushing towards the compressor under normal conditions, let it bark and the thrust vibrates loading one side of the thrust then to the other
plus the radial load placed on the shaft
#281
i play with my wankel
Join Date: Jul 2005
Location: North Manchester, Indiana
Posts: 1,630
Likes: 0
Received 0 Likes
on
0 Posts
How many cubic feet of air do you figure your intake system from the turbo to the throttle body holds compressed at however much psi you're boosting?
#282
Full Member
iTrader: (1)
Join Date: Nov 2008
Location: Hanover, PA
Posts: 60
Likes: 0
Received 0 Likes
on
0 Posts
The tech literature even says that the recirculation valves are to reduce noise. Nothing about turbo life, nothing about response.
Turbo life increased dramatically when watercooling became common. The old turbos died from oil coking because the bearings would run 300-400-500F (going UP after shutoff) while watercooled housings rarely if ever get significantly over coolant temp, even after engine shutoff. No oil coking = turbos don't puke the bearings after 50k like was practically expected in the 80s.
Turbo life increased dramatically when watercooling became common. The old turbos died from oil coking because the bearings would run 300-400-500F (going UP after shutoff) while watercooled housings rarely if ever get significantly over coolant temp, even after engine shutoff. No oil coking = turbos don't puke the bearings after 50k like was practically expected in the 80s.
Mitsubishi used their own turbos, water cooled, no bypass/bov, those turbos never saw over 50k less the car was not boosted its entire life. Usually automatic cars.
Mitsubishi Colts from the late 70s early 80s used water cooled turbos with no bov. Very high failure rate.
The DSMs came out with the use of a factory bpv, suddenly 100k was possible out of the same turbos used on the cars before them.
Skylines have always used Mitsubishi turbos, with a factory bpv, no issues there's.
I'm sensing a common theme. The late 70s early 80s was an experimental time for turbos on factory cars. Mistakes were made, lessons were learned.
But engineers getting paid tons of money to figure this stuff out have no idea what they're talking about.
Thread
Thread Starter
Forum
Replies
Last Post
SakeBomb Garage
Group Buy & Product Dev. FD RX-7
8
10-09-15 10:05 PM
PinkRacer
2nd Generation Specific (1986-1992)
43
10-01-15 09:13 AM