7670 Kit on stock Block - Compression and Leak Down - Opinions Wanted - evolutionm.net



Evo X Engine / Turbo / Drivetrain Everything from engine builds to the best clutch and flywheel.

7670 Kit on stock Block - Compression and Leak Down - Opinions Wanted

Reply
 
 
 
Thread Tools Search this Thread
Old Apr 20, 2017, 01:38 PM   #1
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

7670 Kit on stock Block - Compression and Leak Down - Opinions Wanted

So i did my semi annual check on the motor after beating the **** out of it for a week at VIR and down in deals gap NC and the numbers are as follows:

1 - C 135 L6% 2- C138 L3% 3- C134 L17% 4-C137 L18%

Last year the compression was about the same and the leak down was the same on 1 and 2 and 3 and 4 were both at around 10 or 11%. It looks like the motor is slowly letting go. The question is do i try to finish the season with a couple more track days and weekends in the mountains as is or do i shut it down and put in a built motor now. Thoughts?

Is this a complete time bomb at this point or would there be further warnings signs so i could shut it down before it blows and costs me a block or turbo?
Offline
 
Reply With Quote
Old Apr 20, 2017, 02:21 PM   #2
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

On th eleak down test, where are cylinder 3 and 4 leaking from?
Offline
 
Reply With Quote
Old Apr 20, 2017, 06:40 PM   #3
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

Couldn't hear it out of a valve or exhaust, they think it's likely the rings.
Offline
 
Reply With Quote
Old Apr 20, 2017, 07:55 PM   #4
EvoM Guru
iTrader: (8)
 
razorlab's Avatar
 
Join Date: Aug 2003
Location: Alameda, ca
Posts: 9,968
Thanked 106 Times in 94 Posts

Drives: a laptop connected to your ECU.

did you do the ol' oil in the cylinder trick?
Offline
 
Reply With Quote
The Following User Says Thank You to razorlab For This Useful Post:
2winscroll (Apr 24, 2017)
Old Apr 21, 2017, 06:19 AM   #5
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

No, what trick is that?
Offline
 
Reply With Quote
Old Apr 21, 2017, 01:14 PM   #6
Evolved Member
 
Join Date: Nov 2015
Location: Tri-State NY/NJ/CT
Posts: 637
Thanked 15 Times in 14 Posts

Drives: 2015 Evolution X GSR

Quote:
Originally Posted by ddlopresti View Post
No, what trick is that?
If compression increases with added oil, your rings are sub-par. If it doesn't , then it's the valves?
Offline
 
Reply With Quote
Old Apr 21, 2017, 01:30 PM   #7
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

They "think" its the rings? All that tells me is you got an incomplete report on your leak down test. Take it back, and tell them to tell you where it's leaking down from, not where they "think" it's leaking down from.
Offline
 
Reply With Quote
Old Apr 24, 2017, 07:20 AM   #8
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

spoke to the shop again and it was my selective hearing. They said they could clearly tell where it was coming from and it was the rings.
Offline
 
Reply With Quote
Old Apr 25, 2017, 10:15 AM   #9
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

Well, its not going to "blow up" per se just from excessive leak down at the rings. That being said, it's only going to get worse and I would say it's time to start saving your pesos to at least refresh/replace/build the short block.
Offline
 
Reply With Quote
Old Apr 25, 2017, 01:13 PM   #10
Evolved Member
 
Join Date: Nov 2015
Location: Tri-State NY/NJ/CT
Posts: 637
Thanked 15 Times in 14 Posts

Drives: 2015 Evolution X GSR

When you dump a lot of power into an engine is this just a byproduct (quicker wear/death) of that or did something have to go wrong to cause it?
Offline
 
Reply With Quote
Old Apr 25, 2017, 01:32 PM   #11
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

That would require an autopsy to see what happened. But, generally, the same 2 engines, but one with more power, and driven in a similar manner (amount of time spent in boost/at WOT, or whatever); the higher power setup will wear faster. Keep in mind, on a our turbo cars, you're only making big power when in boost. So, in theory, a high HP setup driven easy could last longer than a stock turbo setup that gets the **** kicked out of it every day.
Offline
 
Reply With Quote
Old Apr 26, 2017, 11:10 AM   #12
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

so i decided to pull the trigger on a built 2.0 block. Moore is going to be doing it using their machine shop (AR Fabrication in Windsor VA). AR Fab seems to have great experience and reviews and they are the Darton east rep. Doing a fully coated, sleeved 2.0 with the usual suspects manley I and wiseco pistons. Hopefully I don't run into any problems that delays it too much, would love to get the car back by late July for some late summer and fall driving.

Last edited by ddlopresti; Apr 26, 2017 at 11:36 AM.
Offline
 
Reply With Quote
Old Apr 26, 2017, 11:24 AM   #13
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

If you still have the option, I would go with a lighter weight connecting rod. Carillo Pro-H would be a good choice at a touch over 70 grams lighter.
Offline
 
Reply With Quote
Old Apr 26, 2017, 12:16 PM   #14
Evolving Member
Thread Starter
iTrader: (1)
 
Join Date: Nov 2011
Location: New York
Posts: 340
Thanked 10 Times in 9 Posts

Drives: 2013 PB GSR - 410/550 (E85)

thanks for the advice. I'm amazed at how light that is, should be much better for the life of the bearings and revving with that weight. Looks like i'm going to use those. Any negatives I should know about? I don't plan to make more than 600WHP (but I would love the option of turning it up if i felt like it haha), are these weak like the manley H beams, online reviews seem to imply they are very strong but carrillo doesn't have a HP rating on their website.

Last edited by ddlopresti; Apr 26, 2017 at 12:32 PM.
Offline
 
Reply With Quote
Old Apr 26, 2017, 12:25 PM   #15
Evolved Member
iTrader: (1)
 
letsgetthisdone's Avatar
 
Join Date: Oct 2013
Location: Las Vegas
Posts: 7,711
Thanked 240 Times in 225 Posts

Drives: 2005 Evo 8. 2011 F150 FX4

Yes, much easier on parts, solid choice to ditch the manley's.


I know in the 4g63, the manley ibeams actually weigh more than OEM rods. Blows my mind people use them. Not much engineering behind them, just a bunch of high strength material in the shape of a connecting rod, which obviously makes them strong, but far from light.
Offline
 
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Question Compression Test Help MrEvo9Mong Evo General 16 Mar 17, 2017 08:11 AM
rate my compression and leak down test b0yw0nder Evo Engine / Turbo / Drivetrain 6 Jun 4, 2016 06:37 PM
HELP--Low compression on fresh build Stinkyevo1 Evo Engine / Turbo / Drivetrain 7 Aug 3, 2015 09:53 AM
Compression test and leak down test nightmare! DuBBzEvo27 Evo X General 11 Jun 29, 2015 10:00 PM
FS[MidWest]: 2006 WW Evo IX MR - Boostin Performance built 2.3 CBRD BBK Full Blitz For Sale - Cars For Sale 6 Jun 5, 2015 09:05 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -7. The time now is 06:04 AM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send