| Author |
Message |
Wheelie Pete
Samba Member
Joined: October 06, 2005
Posts: 540
Location: Detroit Rock City
|
 Posted: Wed Apr 16, 2025 2:01 pm Post subject: 40hp performance build |
 |
|
Hello! Im looking to build a performance 40hp engine for my 59. I haven't decided on the the combo yet - but I wondering if anyone has any engine dimensions. I need to complete my calculations before I decide! I need -
1. Barrel length ( from mating surface to mating surface) I think its shorter than the 1600 barrels, but I'm not sure by how much.
2. Compression Height (distance from top of piston to middle of piston pin) on a stock 77mm 40hp piston.
Does anyone have that info or know where I can find it? I'm fresh out of 40 hp piston and cylinders, so I can't measure it myself!
Thanks!! Wheelie Pete
Last edited by Wheelie Pete on Thu Apr 17, 2025 5:55 pm; edited 1 time in total |
|
| Back to top |
|
 |
l3illN
Samba Member
Joined: November 15, 2008
Posts: 35
Location: San Jose, CA
|
| Posted: Thu Apr 17, 2025 1:29 pm Post subject: Re: 40hp performance build |
|
|
| I measured a barrel and piston. I got 108mm seal to seal on the barrel and 39 pin center to top on the piston. |
|
| Back to top |
|
|
Wheelie Pete
Samba Member
Joined: October 06, 2005
Posts: 540
Location: Detroit Rock City
|
| Posted: Thu Apr 17, 2025 5:56 pm Post subject: Re: 40hp performance build |
|
|
| Thanks!! Wheelie Pete |
|
| Back to top |
|
|
RWK
Samba Member
Joined: June 24, 2009
Posts: 1664
Location: S.W. MI
|
| Posted: Sat Apr 19, 2025 6:08 am Post subject: Re: 40hp performance build |
|
|
Make sure you deck the case, and add case savers, the decks were collapsed or sunk about .008,(.2mm) between the cylinders on the last 40 I worked on, pulled head stud also, found out during re-assemble 
_________________
73 Type 181
63 Type 113
63 Type 261- 428 071
62 Type 241-378 025 178 530 |
|
| Back to top |
|
|
|
