1957 Lincoln 368 rocker arm ratio

Can anyone tell me what the rocker arm ratio is for a 1957 Lincoln 368. I've been told 1.54, 1.6, 1.73.
Thanks.

 

Look up the lincoln Y-block community. They will gladly help you. Or try a search for 368 rocker ratios.

 

Do you or someone you know have some basic Machinist tools and knowledge? It is quite easy to do the calculation and measuring yourself.

Measure the valve lift or depression of the valve spring retainer, and now measure the cam lobe lift at the lifter or pushrod. Divide the lift of the valve/retainer by the cam lobe lift, this is your ratio.

EXAMPLE- .500" valve lift divided by .312" lobe lift is 1.6 rocker arm ratio, TR

 

1.6 for a 368, others were 1.5.

 

From a seller of an Isky cam for a 368, I am looking for a better source, I do have some more info in a note I made on the 368.

1956-1957 Lincoln-Continental-Mercury 368, bore - stroke 4.00 x 3.656--
lifters hyddraulicwith adjusters.
56 285-hp-torque-402 at 3000
57 300-hp-torque-415 at 3000
Head torque 80 to 90 ft lbs, rod bearings 45 to 50 ft-lbs, main bearings 120 to 130 ft-lbs, flywheel 75 to 85 ft-lbs
main journals 2.6235 - 2.6243, rod journals 2.2482 - 2.2490, end play .010, oil clearance .0014,
valve angle 45 int - exh , lift intake and exhaust .417
valve springs 60@1.80, distributor CC dwell 26 to 28, dist,timing 5 before-- 13 1/2 at 2000 rpms,
left bank 5-6-7-8- right bank 1-2-3-4, firing order 1-5-4-8-6-3-7-2, plugs set at .034, 4 barrel, compression ratio -56 9.1-- 57 10.1.

Another note I found;
"The Ford Y-Block 368 (6.0 L) is a Lincoln V8 with a bore that has been increased to 4.00 inches and stroke to 3.66 inches. This increased the output of this engine to 285 hp @ 4600 rpm with 402 ft lbs of torque with a compression ratio of 9.0:1. The Ford Y-Block 368 was first released in 1956 for Lincoln cars, the Mercury Turnpike Cruiser and Continental Mark II with 1.64 inch exhaust valves, a large fuel pump and duel diaphragm distributor. In 1957, they boosted the compression to 10.1:1, added a Carter four-barrel carburetor, and new oil filter. The output of the Ford Y-Block in the second year of production increased to 300 hp and 415 ft lbs of torque. The Y Block 368 was put on the shelf after the second year of production."

From rockerarms.com

368 1957 8 Adj. Rocker (L & R Arms) 2-Bolt Support F-22

You might want to email them rockerarms@rockerarms.com for better info.

rh

 

ive got a set of heads if you need em ... fresh valve job and machine.