LocostUSA.com

Learning how to build Lotus Seven replicas...together!
It is currently March 29, 2020, 2:14 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 1161 posts ]  Go to page Previous  1 ... 74, 75, 76, 77, 78
Author Message
PostPosted: November 24, 2019, 8:17 pm 
Offline
User avatar

Joined: October 13, 2011, 9:19 am
Posts: 1322
Location: Denver Co
Compression testing results
Dry:
CYL1: 120
CLY2: 110
CLY3: 100
CYL4: 120

Wet: they all went up between 180 and 270 but I guess that depends on how much oil I put in. Regardless its pointing to the rings not holding compression. Possibly from running rich and washing the cylinders.

I didnt see any material in the oil when I drained it but I could be in the baffle area so I will need to drop the pan and look further.

I will do leak down test next.

_________________
My build: http://www.locostusa.com/forums/viewtop ... 18&t=13096


You can build the most awesome thing in the world but at some point, an 80yr old man in a crx is probably going kick your butt on the track... don't ask me how I know.


Top
 Profile  
Reply with quote  
PostPosted: November 28, 2019, 7:36 pm 
Offline
User avatar

Joined: October 13, 2011, 9:19 am
Posts: 1322
Location: Denver Co
No bearing material in the oil pan!!!!!!!!!!!!! Yeah!!!!!!!!! I'm going to put a borescope down inside spark plug holes and up from the bottom to see if there's any scoring on the cylinder walls.


Attachments:
20191128_163403-1612x1209.jpg
20191128_163403-1612x1209.jpg [ 390.32 KiB | Viewed 1618 times ]
20191128_163302-1209x1612.jpg
20191128_163302-1209x1612.jpg [ 391 KiB | Viewed 1618 times ]

_________________
My build: http://www.locostusa.com/forums/viewtop ... 18&t=13096


You can build the most awesome thing in the world but at some point, an 80yr old man in a crx is probably going kick your butt on the track... don't ask me how I know.
Top
 Profile  
Reply with quote  
PostPosted: March 14, 2020, 3:19 pm 
Offline
User avatar

Joined: October 13, 2011, 9:19 am
Posts: 1322
Location: Denver Co
Well she started up!! That's a big relief. I think now I am going to drain the coolant and see about modifying the radiator to make it a dual pass. I'm a see if Saldana Racing can quote a new one too. Not quite sure what to do about the cooling problem I figure I would go there next.

_________________
My build: http://www.locostusa.com/forums/viewtop ... 18&t=13096


You can build the most awesome thing in the world but at some point, an 80yr old man in a crx is probably going kick your butt on the track... don't ask me how I know.


Top
 Profile  
Reply with quote  
PostPosted: March 15, 2020, 7:56 am 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 6557
All your pics are gone. You can re-add them the same way you did when posting them.

You've had a ton of advice on cooling from a lot of different people with these cooling issues. Did you implement the air-oil cooler and high amp fan? You could always keep the little spal and use it on another project later as a secondary such as a tow vehicle. Maybe you should just turn down the boost until what you have is reliable.

_________________
MV8

https://www.youtube.com/watch?v=Om3C1Ep ... D3E18BB447


Top
 Profile  
Reply with quote  
PostPosted: March 15, 2020, 12:52 pm 
Offline
User avatar

Joined: October 13, 2011, 9:19 am
Posts: 1322
Location: Denver Co
Yes I did install the high temp fan and the oil cooler. Not the prettiest install though. I did run it on the track but it seem to have little effect along with the higher temp fan. Now I need to start looking at other parts of the cooling system.

Thoughts are:

1) the radiator has stagnant flow causing heat flow (pretty sure)
2) the radiator isn't large enough
3) flow issue (pump or tubing size)

I dont think turning down the boost (pretty low as it is) will help since I can get her to over heat in the garage just getting on the throttle. I also need a way to collect better data. Open to more suggestions.


Attachments:
20200315_102329_copy_2016x1512.jpg
20200315_102329_copy_2016x1512.jpg [ 602.53 KiB | Viewed 870 times ]

_________________
My build: http://www.locostusa.com/forums/viewtop ... 18&t=13096


You can build the most awesome thing in the world but at some point, an 80yr old man in a crx is probably going kick your butt on the track... don't ask me how I know.
Top
 Profile  
Reply with quote  
PostPosted: March 15, 2020, 2:07 pm 
Offline
Automotive Encyclopedia
User avatar

Joined: December 22, 2006, 2:05 pm
Posts: 6557
Post pics. Pretty doesn't matter.

I went back enough to see you put in a high amp fan.

I can make most any car overheat in a confined space. Yes, boost is directly proportional to the heat generated.

What size are the coolant pipes?
Is there a bypass circuit for when the stat is closed? There should be minimal bypass because it allows coolant to bypass the radiator.

How much boost are you running? How much hp?
When you overheat, what are the temps when it starts flowing into the overflow?
How long will it idle without overheat from ambient?
What temp do the fans come on?
Are you monitoring oil temp also?
Where are you taking temp measurements?
What ratio gycol to water are you running? The more glycol, the lower the boiling point.
What is the timing set to?
Too lean at idle?
Feel the radiator core as it warms up. Any cooler spots or is it warming evenly?
Restrictions in the pipes can be felt as it warms up as differences it surface temp.
CO2 check the coolant for bubbles can show if the head gasket is failing and the boost is over-pressurizing the coolant system, causing overflow.

_________________
MV8

https://www.youtube.com/watch?v=Om3C1Ep ... D3E18BB447


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1161 posts ]  Go to page Previous  1 ... 74, 75, 76, 77, 78

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
POWERED_BY