D@nnY

This should help alot of people with questions about which valvesprings to run with which cams they have and which valve springs are stiff and may cause valvetrain wear.

ill add cam specs soon


Skunk2 Pro -B series Vtec- 311-05-5350

60lbs seated at 1.320 or 33.5mm
210 lbs @ .820 " - 20.828mm
bind @ .720 " 18.288mm


Skunk2 tuner springs- B series vtec 311-05-0350

50 lbs @1.320 seated at 33.5mm
210lbs @.820 20.828mm
bind .800 18.288mm

Supertech spr- H1002d

70lbs @ 33.5mm or 1.320"
190 lbs at 12mm lift
max lift 14mm or .551 inch
coilbind -19.5mm or .767 inch


Supertech SPR h100 DR

85 lbs @ 33.5 seated
266 @ 14mm open .551 inch
15mm max lift .590 inch
18.5 mm coil bind


REV- UR8101s

80lbs seated at 34mm
195 @ 10mm
coil bind 19mm
max net lift 12.5 mm

REV UR 8110S

70lbs @ 34 mm lift
170 @ 10 mm
coil bind 19mm
max net lift 14.5 mm

D@nnY

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from 98 vtec


1. Max Lift or Nose
2. Flank
3. Opening Clearance Ramp
4. Closing Clearance Ramp
5. Base Circle
6. Exhaust Opening Timing Figure
7. Exhaust Closing Timing Figure
8. Intake Opening Timing Figure
9. Intake Closing Timing Figure
10. Lobe Separation

BASE CIRCLE:
The concentric or round portion of the cam lobe where the valve lash adjustments are made. A high spot in this area is called BASE CIRCLE RUNOUT.

CAM LIFT:
This is the maximum distance that the cam pushes the follower when the valve is open. This is different from valve lift. See Gross Valve Lift.

DURATION:
The lenth of time that the valve is held off the seat by the cam. This is measured by the degrees that the crankshaft rotates. More degrees of duration will make the engine operate in a higher rpm range.

DURATION AT .050":
The distance measured in degrees of crankshaft rotation from when the valve is open .050" far until it is .050" from closing.

GROSS VALVE LIFT:
This is obtained by multiplying the cam lift by the rocker arm ratio. Rocker arm production tolerences can vary this figure by as much as +/- .015".

OVERLAP:
A situation where both the intake and exhaust valves are open at the same time when the piston is at top dead center on the exhaust stroke. The greater the seat duration is on the intake and exhaust lobes, the greater the overlap will be in degrees.

gabrielsousa

what is the seated oem mm ? is 33.5 too ?