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Author Topic: Stock or SS valves for street  (Read 7327 times)

Offline JW OLDBUSA

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Stock or SS valves for street
« on: June 29, 2008, 02:30:07 PM »
I'm rebuilding mine with 42 k miles and considering new stainless valves. Don't know cond. of old valves.  Had web cams and KW springs for last 30 k. Going to 1441 kit with 13:1 Je's  Street bike only.
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Offline Yngve

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Re: Stock or SS valves for street
« Reply #1 on: June 29, 2008, 02:37:02 PM »
Stock valves anytime.

I have had MANY SS valves on Busa heads fails.
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Offline 396

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Re: Stock or SS valves for street
« Reply #2 on: June 29, 2008, 04:56:29 PM »
yep, new stock valves.
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Offline dakinebusa

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Re: Stock or SS valves for street
« Reply #3 on: June 30, 2008, 07:41:59 AM »
Steel valves are stronger than stainless.
Unless the exhaust gets too hot.
Then you need Inconel..not stainless.
And Titanium on the intake with an extended ECU.
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Offline Oz Booster

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Re: Stock or SS valves for street
« Reply #4 on: June 30, 2008, 07:47:55 AM »
I have had stainless valves gas nitrided supposably for better wear on the street, anyone know if this was usefull or poor advise received..
One of the considerations of the time was an unknown valve guide material  on the 98 truimph daytona
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Offline gazza414

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Re: Stock or SS valves for street
« Reply #5 on: June 30, 2008, 08:20:24 AM »
Quote from: Yngve on June 29, 2008, 02:37:02 PM
Stock valves anytime.

I have had MANY SS valves on Busa heads fails.

Not a question directed at you Yngve, however what material are the stock valves made from???? just "steel" doesnt tell me anything and nor does stainless.....lets be more specific rather than broad brush statements.
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Offline 396

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Re: Stock or SS valves for street
« Reply #6 on: June 30, 2008, 09:44:45 AM »
USE STOCK SUZUKI VALVES, or learn the hard way. Why it is, I do not know, I just know it is.
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Offline JW OLDBUSA

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Re: Stock or SS valves for street
« Reply #7 on: July 01, 2008, 06:50:34 AM »
Thanks everyone for the valuable experience you share. Now where can I find a good price on stockers?
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Offline 396

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Re: Stock or SS valves for street
« Reply #8 on: July 01, 2008, 07:20:11 AM »
Quote from: JW OLDBUSA on July 01, 2008, 06:50:34 AM
Thanks everyone for the valuable experience you share. Now where can I find a good price on stockers?


Now that is the real question! They are expensive.

Ronayers.com
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Offline fvance

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Re: Stock or SS valves for street
« Reply #9 on: July 01, 2008, 11:28:34 AM »
The 08 intakes are 49.95ea on crotchrocket.com
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Offline 396

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Re: Stock or SS valves for street
« Reply #10 on: July 01, 2008, 12:55:21 PM »
2004 on ronayers.com are $25.03 for int. & $34.27 for exhaust.

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Offline fvance

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Re: Stock or SS valves for street
« Reply #11 on: July 01, 2008, 01:50:12 PM »
int 21.38, ex 29.27 on crotchrocket.com
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Offline Jay

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Re: Stock or SS valves for street
« Reply #12 on: July 02, 2008, 01:45:13 AM »
Stainless with stellite face will last longer than oem.
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Offline racerjohn07

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Re: Stock or SS valves for street
« Reply #13 on: July 02, 2008, 10:05:24 AM »
My racing has shown that stainless stellite valves are not better than OEM on stock seats. I have had the sad problems that others have had; stellite valves tulip-ed and clearances were lost the first race out.
My opinion is that Stainless should only be used if you replace the valve seats [and at $45/$50 labor per seat plus $ for seats] and that is costly.
Stock OEM valves are my recommendation.
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Offline gazza414

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Re: Stock or SS valves for street
« Reply #14 on: July 02, 2008, 10:32:52 PM »
What grade of Stellite is used and do you know by what process the overlay is applied???

Jay and RacerJohn ???
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Offline racerjohn07

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Re: Stock or SS valves for street
« Reply #15 on: July 04, 2008, 12:23:02 AM »
The stainless stellite valves used in my second motor were APE.
I do not know the amount of coating. But they did not hold up.
All I know is that I have two identical 1428 motors that I use equally. I didn't learn the first time my engine builder installed stainless in the first motor. They tulip-ed in no time and were replaced with stock. The stock performed great.
When the builder built my second motor, he said the problem with the stainless had been corrected with the APE stainless stellite coating. Well the valves tulip-ed the first time out.
The car weights 1630lbs with driver. The tracks are 7 to 12 turn 2mile plus. The rpm range is 7000 to 11000, using 3rd,4th,5th, and sometimes 6th. These factors may or may not enter into the picture as far as the stainless valve holding their shape. All I know is that I do not recommend the use of stainless valves period.

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Offline Jay

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Re: Stock or SS valves for street
« Reply #16 on: July 04, 2008, 01:42:29 PM »
John;
Would you please PM me the invoice number.

Thanks

jay
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Offline racerjohn07

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Re: Stock or SS valves for street
« Reply #17 on: July 05, 2008, 09:40:19 AM »
Jay,
  The valves were installed by Cooper Performance in Macon, GA. in the spring of 2007. Their invoice read APE stellite valves. I do not have a APE invoice.
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Offline Jay

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Re: Stock or SS valves for street
« Reply #18 on: July 08, 2008, 07:40:54 PM »
Quote from: racerjohn07 on July 05, 2008, 09:40:19 AM
Jay,
  The valves were installed by Cooper Performance in Macon, GA. in the spring of 2007. Their invoice read APE stellite valves. I do not have a APE invoice.

Were they oversize on both sides?

Jay
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Offline racerjohn07

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Re: Stock or SS valves for street
« Reply #19 on: July 08, 2008, 10:54:42 PM »
Jay,
 I sent you a PM.
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Offline midnight black man

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Re: Stock or SS valves for street
« Reply #20 on: July 09, 2008, 06:08:18 AM »
been using ferrea stainless steel for over a decade...never had a failure...no experiance on other brands though...
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Offline FASBUS

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Re: Stock or SS valves for street
« Reply #21 on: July 29, 2008, 11:55:52 PM »
Quote from: midnight black man on July 09, 2008, 06:08:18 AM
been using ferrea stainless steel for over a decade...never had a failure...no experiance on other brands though...

 Thats what Im using on my current project..When going oversized you lose options & w/445 - 415 larger valves are recommended.This is my first one w/larger valves, I pray the ferrea's hold up. :shock:
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Offline midnight black man

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Re: Stock or SS valves for street
« Reply #22 on: July 30, 2008, 01:58:52 AM »
Quote from: FASBUS on July 29, 2008, 11:55:52 PM
Quote from: midnight black man on July 09, 2008, 06:08:18 AM
been using ferrea stainless steel for over a decade...never had a failure...no experiance on other brands though...

 Thats what Im using on my current project..When going oversized you lose options & w/445 - 415 larger valves are recommended.This is my first one w/larger valves, I pray the ferrea's hold up. :shock:

if the machinist did a correct job on the seats,or better more,changed them,they will...

on the other hand,fingers crossed for your webs...(they are webs, aren't they?) :wink:
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Offline FASBUS

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Re: Stock or SS valves for street
« Reply #23 on: July 30, 2008, 10:55:32 PM »
 Seats are correct..valves are the only parts I have in question , but everything else correct .I think they will be ok.I have never had a problem w/web & used them many times(hardwelds & billets).But have heard of some early failures...
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