Volvo RWD 300 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 6/2022 300 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Jetronic to Motronic conversion on 700 Turbo 300 87

posted by  someone claiming to be Kevin R on  Mon Oct 29 08:36 CST 2001 [RELATED]

Hello all,

I was wondering if anyone out there knew whether it was possible to convert my '87 740's Jetronic injection ECU to the newer Motronic ECU found in most 900 series and the newer 700 series. From what I can tell the Motronic offers much better fuel supplies at higher rpm's. Anybody out there know if this is possible to do with little work or if it is possible at all??? Thanks for the help as always...







  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Re: Jetronic to Motronic conversion on 700 Turbo 300 87

posted by  someone claiming to be Pete Fluitman on  Mon Oct 29 13:08 CST 2001 [RELATED]

It is certainly possible, European 760 turbos were all Motronic. All you need is some study of a Volvo parts fische to see exactly what you need.

Regards







  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Re: Jetronic to Motronic conversion on 700 Turbo 300 87

posted by  someone claiming to be John Sargent on  Mon Oct 29 11:48 CST 2001 [RELATED]

The Turbo 900s use LH 2.4 Jetronic rather than Motronic in the US. It is possible to convert, and I have contemplated it myself and I have everything to do the job with. I decided that it was not worth the effort. The LH 2.2 is more reliable than the early LH 2.4, and I don't believe there is enough in performance and economy gains to be worth the effort.







  REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

Re: Jetronic to Motronic conversion on 700 Turbo 300 87

posted by  someone claiming to be wbain on  Mon Oct 29 10:57 CST 2001 [RELATED]

Save yourself the time, money and agrivation by adding a pressure switch and an extra injector during those high boost times, 14-15 psi, to inject extra fuel so detonationdoes not occur. Details can be found here on adding a G-valve and an extra injector.

I added a G-valve to my 740T but I am running regular boost, since I have so many miles and some knocking, and so far so good.






<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.