Volvo project - Page 2 - Fuelly Forums

Click here to see important news regarding the aCar App

Thread Tools Display Modes
Old 07-03-2011, 02:58 PM   #11
Registered Member
brucepick's Avatar
Join Date: Feb 2007
Posts: 722
Country: United States
Location: Connecticut
Re: Volvo project

I have an '89 volvo 240 that I've put about 150K on myself, the clock is now around 340K miles. The drivetrain is essentially the same as yours and I doubt our computers are very different. Mine is LH2.4, if that tells you anything.

Mine had a belt-driven radiator fan that I replaced with an electric one harvested from a Volvo 960 (I-6 engine) with a blown timing belt and thus wrecked valves. Our 2.3 liter four's are non-interference engines. That was a very worthwhile project. Even when the fan clutch isn't engaged, the belt drives the fan and it presents a load to the engine. That load is gone with the e-fan installed.

To mimic oem engine cooling as well as possible, my e-fan is switched on via two methods:

1) Brake switch. If I hit the brakes, it comes on. I did put in a relay with a delay so it doesn't come on for a few seconds, and stays on for a few seconds once activated. This reduces fan cycling. Typical rad fan switching doesn't include this switch but as I noted above, the oem belt setup drives the fan always, even if the engine isn't particularly hot. So I thought it wise to provide airflow when stopped by this method. This avoids having the engine get warmer than usual from traffic light idling etc.

2) Temp switch in the lower radiator hose. I tried switches of different temp values in upper and lower hoses and got best results in the lower hose. The switch's temp setting is something like 165? or 175? F because the cooled water has to be noticeably below the operating temperature in order to cool the engine. Sorry I don't recall exactly what temp value switch I used though.

Currently getting +/- 50 mpg in fall weather. EPA is 31/39 so not too shabby. WAI, fuel cutoff switch, full belly pan, smooth wheel covers.

Now driving '97 Civic HX; tires ~ 50 psi. '89 Volvo 240 = semi-retired.
brucepick is offline   Reply With Quote
Old 07-03-2011, 04:28 PM   #12
Registered Member
theclencher's Avatar
Join Date: Aug 2006
Posts: 542
Country: United States
Re: Volvo project

Good Lord, unless you drive in the desert every day, there's no sense in replacing air filters every 2-3 months.

I finally replaced the factory filter on my F150 at 13 years and 88,000 miles just out of guilt- it was still good.

Old EPA 23/33/27
New EPA 21/30/24

New EPA12/14/17

theclencher is offline   Reply With Quote
Old 08-27-2011, 08:55 AM   #13
Registered Member
guest001's Avatar
Join Date: Feb 2008
Posts: 198
Country: United States
Re: Volvo project

I have a 88 740 turbo that I managed to get 27mpg out of driving something like 85-90% freeway. Never driven it on a roadtrip/100% freeway driving.

31mpg is excellent to me. I wish I could get 30mpg. Now that my OD unit just failied I'm getting 20. I just filled up and it looks like I might get 25mpg with driving 60 or lower, etc.

I've done the basics; tune up, fuel filter, air filter, tb cleaning, pcv service, etc. I need to check and see if my air inlet t-stat is working correctly. with 150k the o2 is still working..... I was thinking about pulling all the a/c parts and converting the fan to electric. but I don't really see it making a difference. I did inflate the tire to max, but caught a nail in a tire and didn't notice it so the results where botched.

interesting info is that in the owners manual it says 30psi F and 36psi R gets the best mileage. and shifting early and using more throttle gets the best mileage. I got my shift light working for a day and it wants you to shift at 2.4k to 2nd and 3rd and like 2.1 2.2k to 4th.

guest001 is offline   Reply With Quote

Thread Tools
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
higher Octane = Better MPG JBW General Fuel Topics 9 04-04-2012 12:54 AM
1998 Honda Superhawk $2000 OBO cat0020 For Sale 0 10-23-2008 08:42 AM
Car Magazines: Do You Subscribe? rh77 General Discussion (Off-Topic) 28 06-14-2008 11:18 PM
Rear deflector...posible mpg gains? ZugyNA Aerodynamics 6 01-10-2008 02:40 PM

» Fuelly iOS Apps
Powered by vBadvanced CMPS v3.2.3

All times are GMT -8. The time now is 12:05 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.