Valve springs

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

Ace

I've used both PAC and Manley in the past with good results.

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.

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.

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.

schmitty wrote:I've used both PAC and Manley in the past with good results.  

x2!

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