Valve weights in grams

kfxguy · 01-18-2011, 12:59 AM

There was a discussion not long ago about different valves weighing more or less than stock. Well I weighed three different types of valves and here are their weights. Please add more if you like and I'll edit this first post to include them.

Stock intake 43.9 grams
Stock exhaust 28.1 grams

Ferrea intake 41.4 grams
Ferrea exhaust 30.5 grams

APE intake 41.6 grams
APE exhaust 30.4 grams

Del West Ti intake 25.5g
Del West Ti exhaust 16.1g

(From a post added later by wheatz)

Quote:

Stock In- 42.6g, 43g
Stock EX-28g, 27.9g

KW In- 35.7g, 35.8g
KW EX- 27.6g, 27.2g

(From a post added later by chrisroberts916)

Quote:

Wiseco
Intake 43.6
Exhaust 28.2

(From a post added later by XSIVPWR)

Quote:

Ferrea Ti valves both +1mm 5.5mm stems.
In 31gr
Ex 21gr

I did notice the ape valves were undistinguishable from the ferrea valves. They look identical in every way except they came in a clear sealed unmarked bag.

CFM-Z440 · 01-18-2011, 01:08 AM

I moved this to performance parts, and stuck it. I might have some +1 weights to add in the future. It's surprising that the stock valves are that heavy in comparison.

kfxguy · 01-18-2011, 01:18 AM

I even cleaned the carbon off the stockers which was worth one gram

I would like to add kibble white to the mix and +1 valves in both ferrea and kibble. Wiseco weights are welcome also, and just for kicks, titanium.

chinoduca · 01-18-2011, 10:14 AM

Damn why didn't I think about weighting my KWs a few days ago.

Hughesc99 · 01-18-2011, 03:33 PM

This may be a dumb question but is this just for chits and giggles or does a gram or 2 make that much difference in valves?

CFM-Z440 · 01-18-2011, 05:20 PM

It gives us an idea of how hard each will be for the valve springs to control. If the valve spring can't control the valve, it can result in cupping, broken off valve heads, or valve to piston contact.

Hughesc99 · 01-18-2011, 05:38 PM

Gotcha

rcfan · 02-15-2011, 02:22 AM

Something ive been wondering about the aftermarket valves compared to the stock valves. Is the thickness of the valve face? Is it the same as stock or are they thicker hence making a little more compression? considering the valves are not sucked up in the head! been thinking about swaping mine out and wondered if the valve head area is thicker (face) so I wont have to mock up and clat everything again its riding season!!

kfxguy · 02-15-2011, 09:30 AM

I'll try to check for you tonight. I have both on my work bench at the moment.

Mudslinger11 · 02-15-2011, 12:06 PM

I have the standard kw's in my shed. Where can I go that would have a scale? Jewelry store?

conquistador · 02-15-2011, 12:27 PM

Quote:

Originally Posted by Mudslinger11

I have the standard kw's in my shed. Where can I go that would have a scale? Jewelry store?

Local head shop

kfxguy · 02-15-2011, 01:45 PM

Quote:

Originally Posted by Mudslinger11

I have the standard kw's in my shed. Where can I go that would have a scale? Jewelry store?

Harbor freight sells a digital scale for $10

Mudslinger11 · 02-15-2011, 04:14 PM

Harbor freight? Do you think they are true? Maybe an issue with this thread, using different scales within a few grams? I'll see what I can find. I wonder how true something like a quarter is to determine if one scale is calibrated with another? Ya know what I'm getting at, if my scale reads 12g for a (quarter) and yours reads 10g, than the info is worthless and misleading.

MTZ · 03-27-2011, 01:03 AM

Quote:

Originally Posted by Mudslinger11

Harbor freight? Do you think they are true? Maybe an issue with this thread, using different scales within a few grams? I'll see what I can find. I wonder how true something like a quarter is to determine if one scale is calibrated with another? Ya know what I'm getting at, if my scale reads 12g for a (quarter) and yours reads 10g, than the info is worthless and misleading.

not accurate but def not worthless you would still know what is lighter by how many grams...

Mudslinger11 · 03-27-2011, 01:22 AM

Quote:

Originally Posted by kfxguy

Harbor freight sells a digital scale for $10

I looked at harbor freight a few weeks ago but no luck, maybe a smaller store. I'm still going to try a jewelry store, there scales have to be super accurate. My wife sure gives them enough, I'd think they would do a favor!

01-18-2011, 01:08 AM	#2 (permalink)
CFM-Z440 Super Moderator Join Date: Sep 2006 Location: Southern Minnesota Posts: 6,432	I moved this to performance parts, and stuck it. I might have some +1 weights to add in the future. It's surprising that the stock valves are that heavy in comparison. __________________ 03 LT-Z 470 Max Power 12.5:1 94mm Piston, Hot Rods +5 Stroker Crank, Web Cams 539 (+6) IN / 539 EX, with Hot Cams sprockets, Ferrea +1 Valves, LTZ/DRZ springs (IN)DRZ springs (EX), DRZ Manual Decomp. Ported head, FCR 41 with Noss adaptor, Home made intake, Modified HMF Full System, Home made header, Trailtech flywheel, Dyna Programable 54hp 36ft lbs

01-18-2011, 01:18 AM	#3 (permalink)
kfxguy :::Get a life! You're over 5000 posts::: Join Date: May 2007 Location: Louisiana baton rouge Posts: 5,896	I even cleaned the carbon off the stockers which was worth one gram I would like to add kibble white to the mix and +1 valves in both ferrea and kibble. Wiseco weights are welcome also, and just for kicks, titanium. __________________ OCTOBER 2009 QOTM KFX470 (The Black beast) -web cams custom grinds, titanium valves,cv4 springs -dyna programmable -4" extended swinger, rad aluminum axle -ported head (by me)(please do not pm me about head porting. Thx) -cp 94mm stroker piston, hot rods +5mm stroker -44mm straight bored fcr carb, Fci intake -powder coated everything Last edited by kfxguy; 01-18-2011 at 01:20 AM.

01-18-2011, 10:14 AM	#4 (permalink)
chinoduca :::Post Whore::: Join Date: Oct 2009 Location: Doha, Qatar Posts: 2,135	Damn why didn't I think about weighting my KWs a few days ago. __________________ '07 LTR 450 - Yoshi rs-5, Intake Hotcam cam, 08 exhaust cam, FuelAtv intake, PCIII, Sandtars all around. '03 White Z400 - SOLD I♥ SuzukiCentral!

01-18-2011, 03:33 PM	#5 (permalink)
Hughesc99 :::Post Whore::: Join Date: Aug 2010 Location: Derby, KS Posts: 2,092	This may be a dumb question but is this just for chits and giggles or does a gram or 2 make that much difference in valves? __________________ 2006 Lt-Z434 Trinity IV Full Exhaust/OSHC/FCR39 w/AP Safety Wired/ Velocity Intake/Odi Rogue Grips/AC Nerfs Factory Suzuki Heel Guards/Durablue Rear Linkage +2+1 A-Arms

01-18-2011, 05:20 PM	#6 (permalink)
CFM-Z440 Super Moderator Join Date: Sep 2006 Location: Southern Minnesota Posts: 6,432	It gives us an idea of how hard each will be for the valve springs to control. If the valve spring can't control the valve, it can result in cupping, broken off valve heads, or valve to piston contact. __________________ 03 LT-Z 470 Max Power 12.5:1 94mm Piston, Hot Rods +5 Stroker Crank, Web Cams 539 (+6) IN / 539 EX, with Hot Cams sprockets, Ferrea +1 Valves, LTZ/DRZ springs (IN)DRZ springs (EX), DRZ Manual Decomp. Ported head, FCR 41 with Noss adaptor, Home made intake, Modified HMF Full System, Home made header, Trailtech flywheel, Dyna Programable 54hp 36ft lbs

01-18-2011, 05:38 PM	#7 (permalink)
Hughesc99 :::Post Whore::: Join Date: Aug 2010 Location: Derby, KS Posts: 2,092	Gotcha __________________ 2006 Lt-Z434 Trinity IV Full Exhaust/OSHC/FCR39 w/AP Safety Wired/ Velocity Intake/Odi Rogue Grips/AC Nerfs Factory Suzuki Heel Guards/Durablue Rear Linkage +2+1 A-Arms

02-15-2011, 02:22 AM	#8 (permalink)
rcfan :::Z-250 Rider::: Join Date: Jan 2009 Location: Broken Arrow ok Posts: 512	Something ive been wondering about the aftermarket valves compared to the stock valves. Is the thickness of the valve face? Is it the same as stock or are they thicker hence making a little more compression? considering the valves are not sucked up in the head! been thinking about swaping mine out and wondered if the valve head area is thicker (face) so I wont have to mock up and clat everything again its riding season!! __________________ 03 Athena bbk,k.w.springs,port&polish,dyna prog, web540-540, Procircuit fullsystem ,39mmfcr, custom airbox intake built by me w/400ex tube and +4hotrods, Rekluse clutch, Elka LT shocks, burgaurd+2 a-arms, Protaper bars, ASV levers, ODI grips, AC propeg nerfs, ATV foreplay? +1 1/4swinger, Maxxis razor2S, black hyper wheels, Houser plus 1 stem, HID conversion, modded yamaha parking brake, G-force axle, and a woodsrider129 rotorgaurd and quick change clutch cover!

02-15-2011, 09:30 AM	#9 (permalink)
kfxguy :::Get a life! You're over 5000 posts::: Join Date: May 2007 Location: Louisiana baton rouge Posts: 5,896	I'll try to check for you tonight. I have both on my work bench at the moment. __________________ OCTOBER 2009 QOTM KFX470 (The Black beast) -web cams custom grinds, titanium valves,cv4 springs -dyna programmable -4" extended swinger, rad aluminum axle -ported head (by me)(please do not pm me about head porting. Thx) -cp 94mm stroker piston, hot rods +5mm stroker -44mm straight bored fcr carb, Fci intake -powder coated everything

02-15-2011, 12:06 PM	#10 (permalink)
Mudslinger11 :::LT500 Rider::: Join Date: Jan 2009 Location: new york Posts: 1,175	I have the standard kw's in my shed. Where can I go that would have a scale? Jewelry store?

02-15-2011, 04:14 PM	#13 (permalink)
Mudslinger11 :::LT500 Rider::: Join Date: Jan 2009 Location: new york Posts: 1,175	Harbor freight? Do you think they are true? Maybe an issue with this thread, using different scales within a few grams? I'll see what I can find. I wonder how true something like a quarter is to determine if one scale is calibrated with another? Ya know what I'm getting at, if my scale reads 12g for a (quarter) and yours reads 10g, than the info is worthless and misleading.

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