2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
Sponsored by:

Compression Check Done..

Thread Tools
 
Search this Thread
 
Old 12-03-06, 02:10 PM
  #1  
Full Member

Thread Starter
 
Akota's Avatar
 
Join Date: Nov 2006
Location: Melbourne, Florida
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
Compression Check Done..

Looks like the average is 65... On these numbers, are you suppose to double them or is that just how they are?

So my question is if it is pretty much done for, which should I do?

Full JDM Swap To 13BT
Full Rebuilt Swap To 13BT
Rebuild Current N/A Engine And Mod Best To Its Ability W/O Turbo
Rebuild Current N/A Engine And Add A Turbo
Old 12-03-06, 02:18 PM
  #2  
Adaptronic Distributor
RX7Club Vendor
iTrader: (12)
 
Turblown's Avatar
 
Join Date: Dec 2001
Location: Twin Cities, MN
Posts: 7,066
Received 91 Likes on 77 Posts
#2
__________________
Rotary Performance Parts


Old 12-03-06, 02:18 PM
  #3  
red rocket

 
redrex7r's Avatar
 
Join Date: Nov 2006
Location: Shoreline.Wa
Posts: 38
Likes: 0
Received 0 Likes on 0 Posts
should be 90-95 time for rebuild
Old 12-03-06, 02:22 PM
  #4  
Full Member

Thread Starter
 
Akota's Avatar
 
Join Date: Nov 2006
Location: Melbourne, Florida
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
I kinda fucked up on the test, didn't pull the fuel pump fuse. I will prob have to check it again, how much difference would that make though?>
Old 12-03-06, 02:45 PM
  #5  
ole blue

 
loskeezy's Avatar
 
Join Date: Nov 2005
Location: Wilmington, NC
Posts: 129
Likes: 0
Received 1 Like on 1 Post
What compression tester did you use?? if using standard piston tester, did you remove the valve from it?
Old 12-03-06, 02:47 PM
  #6  
Full Member

 
RX-7Havik's Avatar
 
Join Date: Jan 2004
Location: Raleigh, NC
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
Are you sure you did it right? REALLY low numbers....
I did mine today and got 100 for front and 105 for rear.
Old 12-03-06, 02:53 PM
  #7  
ole blue

 
loskeezy's Avatar
 
Join Date: Nov 2005
Location: Wilmington, NC
Posts: 129
Likes: 0
Received 1 Like on 1 Post
85 is the norm for being on its last "puff"...IIRC
Old 12-03-06, 03:00 PM
  #8  
Full Member

Thread Starter
 
Akota's Avatar
 
Join Date: Nov 2006
Location: Melbourne, Florida
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
I don't remember. ITs my buds, and he had all kinds of dif fittings for it. It was like a $150 tester.
Old 12-03-06, 03:08 PM
  #9  
Full Member

 
RX-7Havik's Avatar
 
Join Date: Jan 2004
Location: Raleigh, NC
Posts: 146
Likes: 0
Received 0 Likes on 0 Posts
Tester is quite simple buddy. Just go to autozone and buy one for 30 or so bucks. You have the guage with a quick disconnect on it for the line that comes with it and then you will also have three diff fitting sizes for your plug holes. Hook up the line to the fitting and screw it into the top spark plug hole (front or rear first, your choice), just have both plugs out. Then go through the steps. I assume you know what they are. Let me know if you don't.
Old 12-03-06, 05:27 PM
  #10  
Rotary Slave

iTrader: (3)
 
FCKing1995's Avatar
 
Join Date: Jul 2005
Location: Birmingham, Alabama
Posts: 1,599
Likes: 0
Received 1 Like on 1 Post
i tested mine the other day and got mid 70's, but yeah, option #2 is best
Old 12-03-06, 05:27 PM
  #11  
Boost in..Apex seals out.

 
adrock3217's Avatar
 
Join Date: Nov 2003
Location: Maryland, 21794
Posts: 1,931
Likes: 0
Received 0 Likes on 0 Posts
Buy a turbo motor really cheap, rebuild it, save up money, get all your parts together, and drive this motor until your ready to swap. It's on its last leg.
Old 12-03-06, 08:39 PM
  #12  
Full Member

Thread Starter
 
Akota's Avatar
 
Join Date: Nov 2006
Location: Melbourne, Florida
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
I don't nearly have the time or equipment to rebuild a motor atm... My friend has an engine hoist and mounts, but I don't got the garage space since we have 2 MGs in there.

I think I will maybe buy a turbo motor, send it off to someone for a full rebuild + porting, then swap it in.
Old 12-03-06, 09:56 PM
  #13  
yes,thats me \/

iTrader: (1)
 
cdaleracer669's Avatar
 
Join Date: Mar 2006
Location: Eaton, CO
Posts: 861
Likes: 0
Received 0 Likes on 0 Posts
you waited until the motor was warm, and held the throttle wide open right? just making sure, a cold motor will give lower numbers
Old 12-03-06, 10:09 PM
  #14  
Full Member

Thread Starter
 
Akota's Avatar
 
Join Date: Nov 2006
Location: Melbourne, Florida
Posts: 100
Likes: 0
Received 0 Likes on 0 Posts
No.. I just did a ghetto check putting it in one whole and turned it over never starting it. I will try it the way someone else told me to do.

Am I suppose to also have the clutch down while having the gas down?
Old 12-03-06, 10:36 PM
  #15  
The Cause of Death

 
spot_skater's Avatar
 
Join Date: Mar 2004
Location: New York
Posts: 2,202
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Akota
No.. I just did a ghetto check putting it in one whole and turned it over never starting it. I will try it the way someone else told me to do.

Am I suppose to also have the clutch down while having the gas down?
...If you want the car to crank.

And for what it's worth, I am just going to be throwing my j-spec in and starting it up (hopefully). It seems like it is low mileage and sounds like it has good compression.

Worst case scenario, rebuild + large port.

Good luck,
James
Old 12-03-06, 10:48 PM
  #16  
Haven't we ALL heard this

 
Wankel7's Avatar
 
Join Date: Mar 2001
Location: Indiana
Posts: 3,948
Likes: 0
Received 1 Like on 1 Post
You did have the throttle wide open for the test?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ZacMan
Build Threads
4
09-19-15 09:20 PM
Blk 93
3rd Generation Specific (1993-2002)
11
09-09-15 10:56 AM
whinin
New Member RX-7 Technical
10
09-05-15 11:52 PM
ZaqAtaq
New Member RX-7 Technical
2
09-05-15 08:57 PM



Quick Reply: Compression Check Done..



All times are GMT -5. The time now is 04:54 AM.