1.7 multiplier

icarus

Founding Member

Jul 29, 2000

433

0

0

Frederick, MD

Jul 18, 2005

#1

• Jul 18, 2005

• #1

Can anybody tell be what the 1.7 rocker multiplier is. I'm rebuilding my motor on the 85 ans was considering keeping the stock cam. The rebuild is a DSS 306 rotating assembly with powerheads. Just curious what the cam values would be with 1.7 rockers, before I make a final decision on a cam.

Mark

 

9

90Notch

Founding Member

Jan 31, 2002

1,046

0

0

Westwood, MA & yes it's killing me that I'm no

Jul 18, 2005

#2

• Jul 18, 2005

• #2

Stock cam is supposed to have 0.444" lift with 1.6 rockers so:

0.444/1.6 = 0.2775" lobe

0.2775 * 1.7 = 0.472"

 

W

wildstang87

New Member

Jun 9, 2005

96

0

0

Jul 18, 2005

#3

• Jul 18, 2005

• #3

actually, 83 on non HOs : intake.375
exhaust.390
83-85 HOs: intake .413
exhaust .442

these are stock numers with zero lash

 

icarus

Founding Member

Jul 29, 2000

433

0

0

Frederick, MD

Jul 18, 2005

#4

• Jul 18, 2005

• #4

thanks fellows for the formula. I have the cam specs in one of my books. The motor is a 85 HO roller. At least now I can make a comparison.

 

maverick0716

Founding Member

Jan 12, 2002

3,924

0

56

Chilliwack, BC, Canada

Jul 18, 2005

#5

• Jul 18, 2005

• #5

wildstang87 said:

actually, 83 on non HOs : intake.375
exhaust.390
83-85 HOs: intake .413
exhaust .442

these are stock numers with zero lash

Click to expand...

That may be the CFI cammed specs, but not the roller 85 cam. .444/.444 lift, 266/266 duration.