Stock Valve Lift and Drop In Cams

M

MIster2

· Registered

Joined Dec 18, 2000

·

151 Posts

Discussion starter · #1 · Apr 15, 2005

Only show this user

What is the stock Valve Lift for the 2.0L Zetec?

ALso are there drop in cams available for the Zetec? If so , who which model/part number? (price?)

At what point do cams start to cause valve/piston clearance issues on a stock head/block? Over .400" lift?

 

B

BUR_ZX3

· Registered

Joined Apr 24, 2002

·

20,359 Posts

#2 · Apr 15, 2005

Only show this user

NO CAMS ARE "DROP IN"

I dunno if anyone has clayed any pistons to see if >.400 is causing interference... since the engine is non-interference I'm willing to bet that the .413s that are out on the market are fine.

 

D

dominick

· Registered

Joined Apr 1, 2004

·

141 Posts

#3 · Apr 15, 2005

Only show this user

At what point do cams start to cause valve/piston clearance issues on a stock head/block? Over .400" lift?

Click to expand...

.398

 

M

MIster2

· Registered

Joined Dec 18, 2000

·

151 Posts

Discussion starter · #4 · Apr 15, 2005

Only show this user

Let me try to be a little more clear than just the phrase "drop in". - What cams can be installed without changing valve springs and without machining the head, or removing the head?

Are there valve springs that can be installed without removing the head and no machining of the head needed? Using compressed air to keep valves up/closed or the old rope in the spark plug hole method.

 

M

MIster2

· Registered

Joined Dec 18, 2000

·

151 Posts

Discussion starter · #5 · Apr 15, 2005

Only show this user

Zex advertises their cams as working with stock valvetrain and theri lift is .381, so does anyone have these installed?

http://216.109.117.135/search/cache?p=ZE...=1&.intl=us

ZEX™proudly introduces three new nitrided cam designs for the FordZetec 2.0L DOHC engine. Through extensive R&D, the ZEX™engineeringteam developed exclusive Xtreme Energy™lobe designs to achieve theultimate performance for your Ford Zetec engine. Specifically designed
for three different engine RPM ranges, these camshafts are sold in pairs
to insure the most complete component-matched performance and dri-
vability. The ZEX™Ford Zetec 2.0L camshaft sets are designed to workwith stock valve train components, making for a simple “drop-in” instal-
lation. Like every ZEX cam, the Ford 2.0L camshafts are manufactured
to the strictest tolerances.

SERIOUS STREET/RACE-Pulls strong through RPM 1400 to 6000 108100 Z273 273 273 220 220 .381” .381” 112° 112°range. Responds well to bolt-ons.

SEVERE STREET/COMPETITION-Strong improvement in 1800 to 7000 108200 Z281 281 281 228 228 .381” .381” 112° 112°torque and horsepower from mid-range and up.
Responds well to cold air intakes and exhaust upgrades

COMPETITION/PRO RACE-High RPM power. Maximize H.P. 2200 to 7400 108300 Z289 289 289 236 236 .381” .381” 112° 112°gains with aftermarket intake and exhaust upgrades

 

tparker

· Registered

Joined Nov 28, 2004

·

2,797 Posts

#6 · Apr 16, 2005

Only show this user

I have .448 lift on the intake and .440 lift on exhaust and there is no clearance problems. I have had them both advanced to 10degrees and retarded 10 degrees from 0 and neither had problems. Crower recomends valves springs on stage 3 and stage 4 cams, stage 1 and stage 2 are drop in. Stage 3 and 4 need exstensive head work to make them fit. I believe all cam manufactures say there stage 2 cams are drop in and do not need new valve springs.

 

M

MIster2

· Registered

Joined Dec 18, 2000

·

151 Posts

Discussion starter · #7 · Apr 16, 2005

Only show this user

Thanks tparker. How similar are your head and pistons to stock? Or did you run that cam with a stock head and block?

 

Y

Yel900rr

· TEAM Member

Joined Jun 15, 2001

·

2,069 Posts

#8 · Apr 16, 2005

Only show this user

Keep the lift under .390 on stock springs. You shouldn't have any claerance issues. With bigger valves the higher lift over .400 cams get close. All of the Comp or Zex cams will work. The Stage 2 make a good range of power.

 

M

MIster2

· Registered

Joined Dec 18, 2000

·

151 Posts

Discussion starter · #9 · Apr 16, 2005

Only show this user

Is there a VFAQ on cam swap/installation anywhere. I think I'll take excessive number of pics while swapping out the stock cams with a set of comp or zex. My remaining question is on the lash pads that need to be moved around/replaced to keep the gap between cam and valve in that .06 intake and .010 exhuast.

 

S

SwiftDB4

· Registered

Joined Oct 22, 2004

·

28 Posts

#10 · Apr 16, 2005

Only show this user

I installed FR3 cams (.390" lift)and milled the head .040". Still had adequate piston-valve clearance. The bigger problem may be having to slightly grind the tappet bores for cam lobe clearance. Not much is needed, but I wouldn't do it with the head on for fear of metal filings in the engine. Focus Zetecs have no valve clearance shims. You have to swap the buckets around and/or buy some additional ones. I was lucky to be able to swap mine around.

 

tparker

· Registered

Joined Nov 28, 2004

·

2,797 Posts

#11 · Apr 16, 2005

Only show this user

The head and block are the stock hieght. neither have been milled down that is why I have 9:1 compresion. The valves are 1mm larger but that is the only thing different in the combustion chamber. Stage 2 cams will be your easiest dropin with the most gains.