MustangWorks.com - The Ford Mustang Power Source!

Go Back   MustangWorks.com : Ford Forums > Mustang & Ford Tech > Windsor Power
Register FAQ Members List Calendar Mark Forums Read

Notices


Reply
 
Thread Tools Rate Thread Display Modes
Old 07-14-2003, 06:58 AM   #1
86coupe
Registered Member
 
Join Date: Jul 2003
Location: Maryland
Posts: 7
Default Valve spring ?

What problems can happen with valve springs that has lost 100 pounds of seat presure? car was going low tens now hi tens lost 5 mph and 5 tenths. anything else?
86coupe is offline   Reply With Quote
Old 07-14-2003, 07:58 AM   #2
richd
Registered Member
 
Join Date: Jul 2001
Location: Edison, NJ, USA
Posts: 125
Default

You'll get valve float which would rob some power, not to mention the possibility that valve and piston may collide from the valve not retracting fast enough.

Here's the specs for spring pressure from the Ford manual:

Compression Pressure (Lb @ Length)
Intake 74-82 @ 1.78 to 211-230 @ 1.33
Exhaust 77-85@1.60 to 200-226 (doesn't say at what length, so maybe fully compressed? Non HO specifies 192-210 @ 1.05, maybe HO is at same length)

Free Length
Intake 2.02
Exhaust 1.79

Ah, I see that it says service limit is 10% pressure loss @ length. 100 lbs is close to 50% at short length.

Hope this helps,

Rich D.
richd is offline   Reply With Quote
Old 07-14-2003, 10:41 AM   #3
86coupe
Registered Member
 
Join Date: Jul 2003
Location: Maryland
Posts: 7
Default weak valve springs

Thanks for the reply have you ever heard of weak springs killing your 60 ft.? Lets say you have cam that needs 330 seat pressure and it only has 180 but the car goes a 133 in the 1/4. then backs up to 128 after 6 passes. What do you think the perf. would be like with the right spring pressure? Just curious becuse i got screwed on a set of weak *** springs.
86coupe is offline   Reply With Quote
Old 07-14-2003, 07:19 PM   #4
Coupe50h
Registered Member
 
Coupe50h's Avatar
 
Join Date: Aug 2002
Location: SanAntonio, Tx
Posts: 957
Default

my slipping clutch is hurting my 60's....
__________________
X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's.
race weight 3,160

12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear

13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear
Coupe50h is offline   Reply With Quote
Reply


Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Valve spring retainer clip removal Hozer 88GTConv Windsor Power 9 01-28-2004 11:18 PM
valve spring swap -- need help Old Guy with 87 GT Windsor Power 2 05-03-2002 06:33 PM
Update broken valve spring. 92Rustang Windsor Power 5 12-20-2001 04:54 AM
Valve Spring Options Fisher112 Modular Madness 1 08-09-2001 01:09 AM
Valve spring compressor stangbang Windsor Power 4 03-29-2001 04:56 PM


All times are GMT -5. The time now is 02:09 PM.


SEARCH