RPM WS6

iTrader: (3)

Now that I have chosen a cam, I’m looking at valve train. I’ll be getting either a B1 or a very close Comp custom grind. I was wondering which spring would be a better choice? I know that you can reuse the stock retainers on the 918s, but I think I’d get the titanium ones anyway just to lighten up the valvetrain. Which spring do you recommend?

Jax White TA

When i ordered my hammer cam kit from MTI they recommended the 918's. This was last month.

RPM WS6

iTrader: (3)

I guess I just got confused <img src="images/icons/wink.gif" border="0"> I just talked to MTI again and they said to use the 918s for the B1. <img src="images/icons/smile.gif" border="0">

MyLS1Hauls

iTrader: (2)

I wouldn't use the K-motions. They are H-11 tool steel...the same material used in 941s. I have seen several people with broken K-motions and countless people with broken 941. I'm going 918s. Comp Cams says that the 918s are a 'lifetime' spring. That might be pushing it. 941s are recommended to be changed by 15k.

Brad

SpeedDemon

Definitly go with the 918's. Very nice spring! They are extremely versatile in their application also. <img src="images/icons/smile.gif" border="0">

StreetStalkerZ

iTrader: (1)

Well maybe i can help. I got the B1 cam with K motions back in july and well...2 weeks ago i found that i broke #5 cylinder spring and order some 918s to redo the whole valvetrain. As we started to change out the rest of the K motions we found that one of the #8 cylinder spring was broke also and about 5 to 6 more springs that would have snaped at any time. The K motions just plain suck ***. Go with the 918s trust me their ALOT stronger than the K motions.

Pacman

My friend who has told me that K Motion springs are complete junk. He tried them on his bracket car. By the time the season was over he broke 2 K-Motion springs. He previously used Crane Springs with no problems and has used them ever since the K-Motion incident. His car is nothing radical. 355 with Brodix heads. It will run 10.50's in ideal weather. I asked him if he thought he may have gotten a bad batch of springs, but he assurred me that he spoke to the other racers who said they would never run K-Motion springs.

Kevin

Z-28Hugger

When I was ordering springs for my .566" lift 224* Durration 112*LSA cam I was told by more than one company NOT to use the 918 springs cause they aren't strong enough to control valve float. Oh yeah and as for retainers if you don't want to pay $100+ SLP has chromoly valve spring retainers that work with the 941, K-motion size spring and stock keepers, I'm using em. They also have some v-springs but I've not heard of anybody using them. I might if I break a spring just cause of the price as long as they have enough seat preasure.

NicD

iTrader: (7)

[quote]Originally posted by Z-28Hugger:
<strong>I was told by more than one company NOT to use the 918 springs cause they aren't strong enough to control valve float. </strong><hr></blockquote>

What companies were these? All the ones I have been hearing on here are using the 918s.

MyLS1Hauls

iTrader: (2)

I think you are thinking of the 915 springs. These are not strong enough. They are meant as stock replacements. The 918s on the other hand are.

Brad

GeorgeC

The Comp 918's are an ovate wire springs, which supposedly provides many benefits. The two I'm most familiar with are the ability to handle a large amount of valvelift (due to the oval wire design) and excellent valvetrain stability with lower sping pressures as a result of their light weight design. Whether they're as good as Brand X or Y, I won't say since I'm by no means an expert. But, they come highly recommended from a few well trusted sources I've spoken to, and are going in my car along with a new cam very soon.

Then I'll be able to report back some real world results.

RPM WS6

iTrader: (3)

I thought the 918s were the better spring, but I just figured I’d get some opinions before ordering.

Thanks for your reply <img src="images/icons/smile.gif" border="0">

2000 Camaro SS

Lets not forget an important issue. What spring has a better suited open pressure and close pressure for YOUR application. The seller of the cam will help you to make the decision. What good is a Better spring if the valves float for lake of close pressure. I'm not saying they will or not but one has to think of the proper spring for the right job.

RPM WS6

iTrader: (3)

Well, MTI recommends the K-motion kit that they sell to go with the B1 cam. But I just thought the 918s might be a better spring. I don’t know the specs on the K-motions, and I’m certainly not an authority on valve springs, so I guess the better question would be “which spring should be used with the B1 cam, and which is everyone using with success”.

If the K-motion is better suited for the B1, then I have no problem using it. I would just like the spring that will last the longest. Cost really isn’t an issue (except that I don’t want to pay for head machining for double springs). I just want the best “single” spring that I can buy <img src="images/icons/smile.gif" border="0">

RPM WS6

iTrader: (3)

[quote]Originally posted by MyLS1Hauls:
<strong>I think you are thinking of the 915 springs. These are not strong enough. They are meant as stock replacements. The 918s on the other hand are.

Brad</strong><hr></blockquote>

I agree, they must have meant 915s. MTI has specifically told me to get the 918s with the B1. The said they are the absolute best short of going with dual springs.

Z-28Hugger

[quote]Originally posted by MyLS1Hauls:
<strong>I think you are thinking of the 915 springs. These are not strong enough. They are meant as stock replacements. The 918s on the other hand are.

Brad</strong><hr></blockquote>

You're right those are the ones I was thinking of.