Valve springs

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Valve springs

Post  powerstrokeace on November 11th 2013, 2:33 am

Guy's what's been your choice of valve spring as of lately. I have a 555 with Motorsports A460 heads and we have been checking this over and found 2 inner springs broken. There K-Motion 1000H's and did a search and the comments left me feeling 50/50 about buying the same for replacements. These came with the motor when we bought the car. K-Motion doesn't even have a website any more. I read somewhere there"s only 2 spring manufactures in the U.S and one was Peterson spring and they make the PAC springs? Any truth to that

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Re: Valve springs

Post  schmitty on November 11th 2013, 9:23 am

I've used both PAC and Manley in the past with good results.
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Re: Valve springs

Post  David Cole on November 11th 2013, 10:29 am

The springs that come on the new Trick Flow A460's are some good ones. Trick Flow rebrands them with a TFS part # but as far as I know they are Manley Nex Tek springs. part # 221424-16

If the TFS springs are not Manley the specs are the same.
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Re: Valve springs

Post  IDT-572 on November 11th 2013, 10:57 am

David Cole wrote:The springs that come on the new Trick Flow A460's are some good ones.  Trick Flow rebrands them with a TFS part # but as far as I know they are Manley Nex Tek springs.  part # 221424-16

If the TFS springs are not Manley the specs are the same.
This is the spring I have used for years (# 221424-16 Manley). I have a 2.300 stainless valve in my P-51 headed 580 and run through the 1/4 mile at 7800 with no problem.

Just remember, push rods are just as important in keeping your valve train happy.Wink
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Re: Valve springs

Post  Lem Evans on November 11th 2013, 11:16 am

David Cole wrote:The springs that come on the new Trick Flow A460's are some good ones.  Trick Flow rebrands them with a TFS part # but as far as I know they are Manley Nex Tek springs.  part # 221424-16

If the TFS springs are not Manley the specs are the same.
 
The springs on your tfs heads were A Erson part # . They are made by the same mfr. as the Manley......same spring in a different box.
 
The tfs A460 springs are now 1224 PAC.

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Re: Valve springs

Post  cool40 on November 11th 2013, 10:36 pm

schmitty wrote:I've used both PAC and Manley in the past with good results.  
x2!
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Re: Valve springs

Post  jc10000rpm on November 12th 2013, 6:24 am

isnt the PAC 1224 double setup about the same as the NEXTEK 221447 tripples with the inners removed ??

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