Volvo RWD 140-160 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 1/2015 140-160 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Picking a B20 head for my 145 140-160

posted by  Gary L on  Mon Mar 14 07:49 CST 2011
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Wed Oct 22 10:26 CST 2014
[RELATED]

To expand upon what George has already said...

- The "E" and "F" heads have the same size valves... 35mm exhaust, 44mm intake.

- I could be wrong, but I was under the impression that all "F" heads had hardened valve seats from the factory. Maybe it was just the later ones though (73'ish & up). This is based simply on the fact that my '73 ES owner manual clearly states that low-lead gas may be used.

- In bone stock configuration, I believe the "E" head flows a bit better than the "F", and for sure it carries much higher compression... 10.5:1 vs 8.7:1. Bottom line was about 10 (SAE net) hp difference between the two, assuming d-jet injection on both.

- The difference in compression ratio between the thinnest gasket (about .030") and the thickest (IPD's low c/r .068") is going to be approximately 1 full point... e.g. 10.5:1 vs 9.5:1.
--

Gary L - 142E ITB race car, 73 1800ES
BlueBrick Racing Website
YouTube Racing Videos






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Picking a B20 head for my 145 [140-160]
posted by  MisterBLC  on Sun Mar 13 19:32 CST 2011 >


<< < > >>



©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.