valve springs

1981 Views 10 Replies 9 Participants Last post by FWDsux, Jan 6, 2004

williamb82

Discussion Starter · Nov 28, 2003

does anyone know the outer diameter of the stock valve springs? and also, the spring pressure.
william

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84 TSRM INFO

This I found in the tsrm, maybe helpful, not sure about the outer diameter :?

A. Using steel square, checking squareness
Max allowable 2.0mm (0.079in.)

B. Free Height:
Intake side 49.1mm (1.933 in.)
Exhaust side 52.5mm (2.067 in.)

C. Spring tester-if not this, replace.
Installed Height:
Intake side 40.0mm (1.575 in.)
Exhaust side 43.0mm (1.693 in.)

Installed tension:
Intake side 34.7-38.3 Kg, (76.5-84.4 lb, 340-376 N)
Exhaust side 33.3-36.7 kg, (73.4-80.9 lb, 327-360 N)

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williamb82

Discussion Starter · #3 · Nov 29, 2003

thanks. that info will help alot. ill try to dig out a stock spring this weekend and measure it. hopefully ill come up with a part number for some v8 springs that will work properly.
william

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supraz

· #4 · Nov 29, 2003

williamb82

The stock Intake springs

o.d. 1.2755"
i.d. 0.9195"
Gauge 0.1750"
Free Height 2.0780"

The stock Exhaust spring

o.d. 1.2755"
i.d. 0.9165"
Gauge 0.1765"
Free Height 1.9331"

Give or take. I measured them recently.

Dale

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glntom

· #5 · Dec 26, 2003

Did anyone find a source for new stock type, or aftermarket valvesprings for 5/6mge?? If so, please post supplier, and type of spings.

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krunk

· #6 · Dec 31, 2003

try paeco, they can probably make them for you.

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3000cc MK2

· #7 · Dec 31, 2003

krunk said:
try paeco, they can probably make them for you.

PAECO... they make double springs one inner spring and an outer spring and I think a bucket is needed for the double spring set-up but I am not sure about it

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williamb82

Discussion Starter · #8 · Dec 31, 2003

for double springs, the stock dual springs from mid 80's 300zx turbos look about right. havent tried them yet though.
william

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57M-GTE

· #9 · Jan 5, 2004

I seem to remember someone once saying that standard valve springs from a chevy 350 work perfectly and getting stiffer valve springs from a performance shop (ie: Loper's, etc.) was the way to go.

Can anyone verify this? :?

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DKJones96

· #10 · Jan 5, 2004

stiffersprings will work as long as they aren't too stuff. then you end up causing needless wear and the lifters start pumping up and you also lose power to friction when they are too stiff.

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FWDsux

· #11 · Jan 6, 2004

57M-GTE said:
I seem to remember someone once saying that standard valve springs from a chevy 350 work perfectly and getting stiffer valve springs from a performance shop (ie: Loper's, etc.) was the way to go.

Can anyone verify this? :?

I measured (With a tape :roll: ) some sbc valve springs at Napa and they are the same as our exhaust springs. The intake is a bit taller though. I don't know it that's a big deal or not but I'd rather stick as close to stock height as possible.

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valve springs

williamb82

DannyG

williamb82

supraz

glntom

krunk

3000cc MK2

williamb82

57M-GTE

DKJones96

FWDsux

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