Iron gt-40 heads, tfs-1 cam what valve springs?

bjl95mustang

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Jan 18, 2000

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Austin,TX

Oct 3, 2004

#1

• Oct 3, 2004

• #1

I was looking at my heads and i have no idea what springs are on them. What is a good set of springs that I can use my tfs-1 cam with 1.6rr or even maybe 1.7 rr with?

 

Cobra4075

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Feb 18, 2002

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Tinley Park, IL

Oct 3, 2004

#2

• Oct 3, 2004

• #2

120# springs should be good for that set up. What is the lift of the tfs cam? I think the stock gt-40 springs are 105#. I'm using 120# and my lift is about .580 with no valve float to 6100 rpm.

 

bjl95mustang

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#3

• Oct 3, 2004

• #3

I'm new to the valve train thing. What are 120# springs?

 

GTPhreak

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Mar 16, 2000

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Rowlett, TEXAS

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#4

• Oct 3, 2004

• #4

cant beat the trick flow spring kit for price

 

blksn955.o

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st.louis mo 314

Oct 4, 2004

#5

• Oct 4, 2004

• #5

I had the machine shop install the comp. cams beehive springs that are rated at .550 lift.

 

scarless

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Aug 9, 2004

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Oct 4, 2004

#6

• Oct 4, 2004

• #6

Depending on the lift of yor cam, here are some springs commonly used.

Crane kit 44308-1 120# @ 1.94
Ford M-6513-A50 110# @ 1.82
Trick Flow 2500100 110# @ 1.80
CompCams 972-16 124# @ 1.80

 

Chythar

Recently finished repairing my rear

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Aug 26, 2004

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Foothill Ranch, CA

Oct 4, 2004

#7

• Oct 4, 2004

• #7

Cobra4075 said:

120# springs should be good for that set up. What is the lift of the tfs cam? I think the stock gt-40 springs are 105#. I'm using 120# and my lift is about .580 with no valve float to 6100 rpm.

Click to expand...

According to the info on www.oemfordparts.com (part number <a href="http://www.oemfordparts.com/PartDetail.asp?S=1&PartID=200" target="oem">M-6513-A50</a>), the GT-40 springs are rated at 110#. Just a bit better that 105#, but still short. Would the extra 10# make that much of a difference?

 

bjl95mustang

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Oct 4, 2004

#8

• Oct 4, 2004

• #8

Ok, I got the springs checked today and I have different intake and exhaust springs. On the intake springs at 1.80 i get #130-135, the exhaust are #120-125 and the springs are fully compressed at .700. Sence I have stiffer springs on the intake how would I go about swapping them to the exhaust valves becuase I have more lift on the exhaust side with the tfs-1? How do I determen the install height?