Drop-in Pistons
Drop-in Pistons
First off, I know the difference between dropping in pistons and fully building the engine, and what possible risks are involved.
What I'm curious about (and haven't been able to find much information on) are people's experiences doing drop-in pistons (especially long term). How prone to getting out-of-round are the sleeves (when is "too late" for drop-ins)? Any compression problems long term? Any problems at all long term?
I know it's best to just pull the engine, machine it, and build it right, but for some that have their Evo as their only car (like me) the notion of a day or two of downtime is much better than the likely extended downtime of a full engine build.
I'm asking from the viewpoint of a possibility to give a little extra piece of mind when running something like an EF3/Red on E85 on a daily driver.
Anybody have any experience (especially long term)?
What I'm curious about (and haven't been able to find much information on) are people's experiences doing drop-in pistons (especially long term). How prone to getting out-of-round are the sleeves (when is "too late" for drop-ins)? Any compression problems long term? Any problems at all long term?
I know it's best to just pull the engine, machine it, and build it right, but for some that have their Evo as their only car (like me) the notion of a day or two of downtime is much better than the likely extended downtime of a full engine build.
I'm asking from the viewpoint of a possibility to give a little extra piece of mind when running something like an EF3/Red on E85 on a daily driver.
Anybody have any experience (especially long term)?
Doesn't make sense. You won't get many answers Because your already tearing the motor apart.
The VW world had alot of those kits but they just don't sell. Machining is a critical part of the rebuilding process.
Do it right.
The VW world had alot of those kits but they just don't sell. Machining is a critical part of the rebuilding process.
Do it right.
mlomker did it on his car but he had blow-by problems. If you do it make sure to hone the cylinders. He had less than 5k on his car iirc.
Just buy a motor outright and swap it in, then sell your stock, 100% running bottom end.
Just buy a motor outright and swap it in, then sell your stock, 100% running bottom end.
Evolving Member
Joined: May 2008
Posts: 194
Likes: 0
From: Oxnard, CA
The best way to go about it in my situation (assuming drop-in pistons aren't an option, and it doesn't seem like there's enough info out there to be anything but the guinea pig) is to go with MAP and use their core swap option.
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We ran Cosworth drop in pistons in our 800whp build over two years ago and the motor is still in perfect condition today with countless passes, dynos and our 9 second run. We did have to eliminate the oil squirters but other than that we are good to go!
Michael
Michael
How many miles were on the car when you did it? Do you drive it a decent amount in addition to dyno runs/passes? This is some encouraging news at least!
Miles to the motor was unknown since our first one popped from the rod bolts. This car has been street car the whole time.
Cosworth Rods, Pistons, Head Gasket
ARP Rod bolts
GSC S2 Cams
Ferrea Valvetrain
Tons of abuse.
Cosworth Rods, Pistons, Head Gasket
ARP Rod bolts
GSC S2 Cams
Ferrea Valvetrain
Tons of abuse.
No ****? This I did not realize Michael... You make it sound so easy!
So to make sure I'm understanding right, you bought an unknown miles used motor, put pistons/rods in it without machine work, and went? Just making sure we mean the same thing when we say "drop-in pistons" and you don't just mean stock size pistons with proper machine work.
