Rising Sun Member Forums  

Go Back   Rising Sun Member Forums > Toyota 4x4 > General Tech Forum

Notices

Reply
 
Thread Tools
  #1  
Old 02-25-2008, 09:27 PM
timmbuck2's Avatar
timmbuck2 timmbuck2 is offline
Rising Sun Member
 
Join Date: Oct 2005
Location: Denver
Posts: 3,011
Default 2f compression

how bad is 90 on each cylinder?
__________________
* 00 LC
* 03 LX470 -
* 97 Saab Convertible -
* 99 Saab 9-3 Convertible
* stinky old Ford Diesel tow rig
KDěTIM
TLCA# 15572
TLCA Executive VP 2008-2011
CM Committee Member CM10, CM11
Reply With Quote
  #2  
Old 02-25-2008, 09:36 PM
wesintl's Avatar
wesintl wesintl is offline
Hard Core 4+
 
Join Date: Aug 2005
Location: in da house
Posts: 7,525
Send a message via AIM to wesintl
Default

not so good
__________________
See you on the trail
WěREK
Couple o' FJ40's, BJ70, UZJ100, TDI 66FJ40,82FJ60,97FZJ80
TLCA#4180
Reply With Quote
  #3  
Old 02-25-2008, 09:56 PM
RicardoJM's Avatar
RicardoJM RicardoJM is offline
Rising Sun Member
 
Join Date: Jul 2007
Location: Centennial, CO
Posts: 2,301
Default

Quote:
Originally Posted by timmbuck2 View Post
how bad is 90 on each cylinder?
Are you speculating or talking about actual numbers? I hope it is speculation. If they are actual numbers I know an alley with a 1F already mated to a transmission and x-fer case that is ready to be dropped into something.
__________________
Ricardo Maestas - Bio Page
KD0CAW
1999 LX 470, 1971 FJ-40
TLCA #18941
Reply With Quote
  #4  
Old 02-25-2008, 10:03 PM
timmbuck2's Avatar
timmbuck2 timmbuck2 is offline
Rising Sun Member
 
Join Date: Oct 2005
Location: Denver
Posts: 3,011
Default

I have at least 2 2fs already. this is that 2f down in Parker...
__________________
* 00 LC
* 03 LX470 -
* 97 Saab Convertible -
* 99 Saab 9-3 Convertible
* stinky old Ford Diesel tow rig
KDěTIM
TLCA# 15572
TLCA Executive VP 2008-2011
CM Committee Member CM10, CM11
Reply With Quote
  #5  
Old 02-26-2008, 05:24 PM
Rzeppa's Avatar
Rzeppa Rzeppa is offline
Cruise Moab Committee
 
Join Date: Aug 2005
Location: Kittredge CO, USA
Posts: 5,178
Default

90 will run just fine. Not fresh, but probably not broken rings either.

I am sure you've probably already read about the trick of putting a teaspoon of oil into each cylinder to see if the number come up or stay the same; if they come up it's rings, if there's no difference it's valves.

A couple tricks an engine builder taught me about taking compression readings:

(1) Take all the plugs out.
(2) When cranking the engine, open the throttle so the cylinders get full air.
(3) Try the reading 2 or more times to make sure (this is actually basic metrology).
(4) At higher altitudes, you can never get sea level numbers (this is basic physics).

The absolute pressure in Denver is about 12 PSI, versus 14.7 at sea level. Expect compressions numbers to drop by that ratio (12/14.7=0.8) or to convert Denver readings to sea level divide by that number (90/0.8=113). A nominal 150 PSI engine should read about 120 in Denver.
__________________
Jeff Zepp
Kittredge CO USA
1971 & 1976 FJ40s, 1978 FJ45, 1987 FJ60
Rising Sun 4WD Club, TLCA #4063
http://american3dprinting.net/
Reply With Quote
  #6  
Old 02-27-2008, 08:16 AM
farnhamstj's Avatar
farnhamstj farnhamstj is offline
Hard Core 4+
 
Join Date: Aug 2005
Location: vail co
Posts: 2,577
Default

My 78 was between 95-105 at 8,000 ft. Seemed ok to me. Not fast, but not the slowest 40 either. I could do 45 up Vail pass. Little known fact of Land cruisers body numbers. The numbers match the max speed while traveling west from Denver, For example..
fj40....expect 40mph just before you enter the tunnel
fj60....expect 60mph
fzj80.... now we're talking.
uzj100...look out for the police.
__________________
98 uzj100. Factory rear-ARB front locked 4.88's. ARB Bull, Warn 9000, Irbis rear bumper, Slee sliders and belly pan. OME t-bars w/863 rears, HID, XM
KD0GWO
Reply With Quote
  #7  
Old 02-27-2008, 08:25 AM
MDH33's Avatar
MDH33 MDH33 is offline
Rising Sun Member
 
Join Date: Mar 2006
Location: Land of Corn
Posts: 5,778
Default

Quote:
Originally Posted by farnhamstj View Post
fj60....expect 60mph
I would be in heaven if my 60 could reach 60mph on I-70. 35 tops going up that hill...
__________________
--Martin
Reply With Quote
  #8  
Old 02-27-2008, 09:18 AM
60wag's Avatar
60wag 60wag is offline
Rising Sun Member
 
Join Date: Aug 2005
Posts: 1,781
Default

My 60 had 150psi after the rebuild measured at 5400ft. There were days I could do 55 going up I70 - low head wind, no extra passengers, etc.
__________________
Bruce
'96FZJ80
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln
Reply With Quote
  #9  
Old 02-27-2008, 10:51 AM
treerootCO's Avatar
treerootCO treerootCO is offline
Rising Sun Member
 
Join Date: Aug 2005
Posts: 4,419
Send a message via AIM to treerootCO
Default

The 2F in my 40 has 60 on the best cylinder. My lowest one is 30
__________________
aka Mike D.----->Bio Page KD°GWY
ôHe who goes unarmed in paradise had better be sure that that is where he is.öŚJames Thurber
"Its better to be thought a fool rather than to speak up and remove all doubt." - Lincoln
pride is ego, the word I had lost was dignity. The quality or state of being worthy of esteem or respect.
Ptarmigan build thread - 95FZJ80
www.root45.com
www.risingsun4x4club.org

TLCA #14133

Reply With Quote
  #10  
Old 02-27-2008, 11:02 AM
DaveInDenver's Avatar
DaveInDenver DaveInDenver is offline
Hard Core 4+
 
Join Date: Jun 2006
Location: Larimer County
Posts: 6,512
Default

Quote:
Originally Posted by treerootCO View Post
My lowest one is 30
So that's about 6 psi for each 100,000 miles on it?
__________________
'91 Toyota Pickup
'09 Kawasaki KLR650
'12 Gunnar Rockhound 29

"They say the test of literary power is whether a man can write an inscription. I say, 'Can he name a kitten?'" -- Samuel Butler
Reply With Quote
Reply

Thread Tools

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


All times are GMT -6. The time now is 02:02 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.