BBC 509cid tunnel ram efi build.
#92
Thread Starter
Registered

Joined: Jan 2009
Posts: 682
Likes: 177
From: Finland
Intake almost ready and will be test fitted the last time during the next week. Got a nice set of johnsson 2126bbr lifters from Sporl performance, and currently checking the valvetrain geometry. I went with the shortest valves that was possible with the my 290cc floteks, 5.35" exh/ 5.32" int, and got perfect 040" sweep right in the center of the valve tip with 1.7 crane gold rockers. Isky 9005 spirngs 185/470lbs. Damn those 2.3" ferrea intake valves are heavy, 155g so going to use titanium retainers at intake side to get the weight closer to the exhaus valve, wich is 135g.






#94
Thread Starter
Registered

Joined: Jan 2009
Posts: 682
Likes: 177
From: Finland
#97
Thread Starter
Registered

Joined: Jan 2009
Posts: 682
Likes: 177
From: Finland
Some progress for a long time. Plenum to intake alignemet was horrible wich is now corrected.
Going to give final touch for the plenum port entrys tomorrow and intake is ready.
Also timed the cam and set the icl to 108. The cam is 240/245 @050, 301/306 @006", 114lsa, 0.665/0.665 lift. I may advance the cam 2 degrees more 106icl before the first dyno pull, and then set the icl to 110 and see how it effects the powerband.







added alignemet pins for plenum before port matching

Going to give final touch for the plenum port entrys tomorrow and intake is ready.
Also timed the cam and set the icl to 108. The cam is 240/245 @050, 301/306 @006", 114lsa, 0.665/0.665 lift. I may advance the cam 2 degrees more 106icl before the first dyno pull, and then set the icl to 110 and see how it effects the powerband.







added alignemet pins for plenum before port matching

Last edited by JaniH; 08-18-2024 at 02:17 PM.
#98
Thread Starter
Registered

Joined: Jan 2009
Posts: 682
Likes: 177
From: Finland
#100
Thread Starter
Registered

Joined: Jan 2009
Posts: 682
Likes: 177
From: Finland






