Dillon,
What is your leakdown saying you should do? Your wet compression test
indicates rings. That's alot of ring wear for 70k I think. Was your leakdown
test hot or cold? If cold, repeat hot and listen for where the air is going.
----- Original Message -----
From: Dillon
To: miatapower List
Sent: Tuesday, June 10, 2008 1:21 AM
Subject: turbo a motor with less than perfect compression?
I've posted on and off about my engine "troubles" so I apologize if any of
this is repeated.
I have a 99 10AE that just tipped 70k miles. I'm planning to add a turbo
(specific kit / parts not yet determined) with a Megasquirt ECU for engine
management. I plan to start at around 5-6psi and upgrade from there. First
step is to get the MS wired up and working, then I'd like to add the turbo.
However, before starting anything, I checked the compression on the motor and
did a leakdown test that showed leaking around the rings.
a.. Dry/hot Compression: 175 - 152 - 150 - 175
b.. Wet/hot compression: 200 - 187 - 180 - 205
c.. Leakdown: 25% - 35% - 35% - 10%
I am not using any appreciable amount of oil now, and the car seems healthy
(aside from the numbers). I was shopping for a replacement block, or a
reputable shop to rebuild the bottom-end, but it's been suggested that I should
just turbo the motor that I've got, and deal with the engine rebuild in the
future.
Considering my low (initial) power goals, how much of a gamble is this? If I
could squeak out 6-12 months on this motor before it started using lots of oil,
I'd be a happy camper. What do you guys think? Any experiences boosting a
motor with numbers like mine?
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