stainless valves
07-02-2013, 04:01 AM
#1
stainless valves I have a set of milled 317 heads and I am going to replace the valves and have a valve job done. I bought some new ferrea F6230 stainless intake valves
2.00" from a member on here for a great price.Do I have to buy the exhaust stainless valves from the same company or can I use say another manufactures stainless valves(like rev). As long as they are Ls1 valves will that work ok. I can get a deal on some 1.55" from another company.
Can you use 1.57" exhaust valves with 2.00" intake valves, instead of 1.55". My friend says that you can't do that. What do you guys think?
2.00" from a member on here for a great price.Do I have to buy the exhaust stainless valves from the same company or can I use say another manufactures stainless valves(like rev). As long as they are Ls1 valves will that work ok. I can get a deal on some 1.55" from another company.
Can you use 1.57" exhaust valves with 2.00" intake valves, instead of 1.55". My friend says that you can't do that. What do you guys think?
07-02-2013, 04:25 AM
#2
TECH Fanatic
Who is milling the heads? They can probably do whatever you want. But I would ask them... That's kind of their realm of knowledge. You can run whatever you want, it just may not be optimized for proper flow.
07-02-2013, 08:11 PM
#6
No the stock valves are in good shape.I thought that the stainless were better valves.That's why I was going to replace them. Are the stock valves any good? A machine shop told me that my money was better spent porting these heads than replacing them with 2.02" 1.57" valves. That's why I am asking you guys about this.
07-02-2013, 08:19 PM
#7
Staging Lane
Join Date: Feb 2013
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You will get far more gain out of porting, aftermarket same-size valves will gain nothing, and going up .02" won't do anything either without porting. Just port and leave the stock valves with a proper valve job.
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07-02-2013, 09:36 PM
#8
TECH Senior Member
No the stock valves are in good shape.I thought that the stainless were better valves.That's why I was going to replace them. Are the stock valves any good? A machine shop told me that my money was better spent porting these heads than replacing them with 2.02" 1.57" valves. That's why I am asking you guys about this.
07-02-2013, 10:37 PM
#9
Stock valves are fine. I actually run stock LS3 intake valves on my heads... they've just been "turned" down to the correct size. I run a Ferrea stainless exhaust valve.
TEA and Ai both do porting on stock heads and keep stock valves. You lose velocity when you move to a larger valve, but if you have more bore or need more upper lift/RPM flow, they can help.
TEA and Ai both do porting on stock heads and keep stock valves. You lose velocity when you move to a larger valve, but if you have more bore or need more upper lift/RPM flow, they can help.
