Crankshaft for 3.8L rebuild
05-11-2011, 12:44 PM
#1
Drifting
Thread Starter
Crankshaft for 3.8L rebuild
I acquired a 75 911 RSR replica.
We believe it has a spun bearing.
The engine was partly torn down, but not completely.
Diagnossed as piston slap prior to tear down.
Just got the car and engine Monday -- quick inspection
seems one of the conn rods feels a little loose.
Assuming a spun bearing.
The engine was built with 12.4:1 compression pistons and rumored
to pull 411 to the wheels. Prior owners, money was no object.
Not so with me :-)
Looking to tame her down, run pump fuel, and go for reliability and
a little more economics. Start out PCA DE's, when my skills evolve,
PCA Club Racing.
Hope to rebuild with existing components, but instead of machining the crank
it seemed the 997 GT3 cranks were not outrageously priced compared to potential crank MS costs.
Read that 997 GT3 crankshaft is the way to go.
However there are none to be had.
Checked SunCoast and SunSet -- both are on back order -- not even available in Germany with an unknown availability date.
BTW the parts number supercedes to the 2010 model.
What other options are there?
thanks,
Mike
We believe it has a spun bearing.
The engine was partly torn down, but not completely.
Diagnossed as piston slap prior to tear down.
Just got the car and engine Monday -- quick inspection
seems one of the conn rods feels a little loose.
Assuming a spun bearing.
The engine was built with 12.4:1 compression pistons and rumored
to pull 411 to the wheels. Prior owners, money was no object.
Not so with me :-)
Looking to tame her down, run pump fuel, and go for reliability and
a little more economics. Start out PCA DE's, when my skills evolve,
PCA Club Racing.
Hope to rebuild with existing components, but instead of machining the crank
it seemed the 997 GT3 cranks were not outrageously priced compared to potential crank MS costs.
Read that 997 GT3 crankshaft is the way to go.
However there are none to be had.
Checked SunCoast and SunSet -- both are on back order -- not even available in Germany with an unknown availability date.
BTW the parts number supercedes to the 2010 model.
What other options are there?
thanks,
Mike
Last edited by txhokie4life; 04-21-2015 at 03:17 PM.
05-11-2011, 01:05 PM
#2
Rennlist Member
964 crank?
411 at the wheels, huh..............
Friend is nearing completion on a PRC GTL more-or-less stock 3.6L engine class. He's about $15K into it on the engine, mostly for reliability purposes. No free lunch on these things. The 3.8L in my faux 993RS was $30K of its build.
411 at the wheels, huh..............
Friend is nearing completion on a PRC GTL more-or-less stock 3.6L engine class. He's about $15K into it on the engine, mostly for reliability purposes. No free lunch on these things. The 3.8L in my faux 993RS was $30K of its build.
05-11-2011, 10:52 PM
#4
Rennlist Member
Which is what Scott is starting with for his GTL car. But by the time you get it professionally prepped, and ready to withstand actual racing...............
Another friend gave up on his 3.6L race engines (GT2 class club racer) and threw in 1, 2, 3 stock engines. Stock engine #3 was one of mine he needed in an ER to make a race weekend, and thankfully it came out intact.
Another friend gave up on his 3.6L race engines (GT2 class club racer) and threw in 1, 2, 3 stock engines. Stock engine #3 was one of mine he needed in an ER to make a race weekend, and thankfully it came out intact.
