Volvo RWD 1800 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 7/2006 1800 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

B18 or B20 big bore? 1800

posted by  Gordon Hunter on  Wed Oct 19 08:16 CST 2005
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Sat Mar 27 03:04 CST 2010
[RELATED]

Hi there,

Can anyone help?
I have a '66 P1800 S with a nice 'n' tight, rebuilt B18 with a few goodies onboard - high lift cam, lightened flywheel, balanced crank, rods, ported head, etc. Unhappy with the amount of torque available, I bought a new set of B20 +0.762 pistons for next to nothing off eBay. Now, I was quite happily going to pull the B18 and rebore to B20 spec. 'BUT' I just acquired an early (6 bolt flywheel) B20 carbed motor (I think its from a late P1800S).

My question is this:

Should I stick with the original B18 plan or should I go for the early B20 rebuild and try to fit the 2130 cc B21 pistons. I realise that this will mean a fair bit of faffing about, but If the power increase is significant enough over the B20 spec B18, I'd be happy to give it a go...

Any comments or advice would be welcome.

Thanks,

Gordon






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New B18 or B20 big bore? [1800]
posted by  Gordon Hunter  on Wed Oct 19 08:16 CST 2005 >


<< < > >>



©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.