Some parts too look at (Valvetrain)

[Syn]

You can! Here's some good reading: http://www.60degreev6.com/modules.ph...rtid=34&page=1

yes but my cam is not stock so the ls1 springs are out the window. and i don't really wanna go drinding away at my heads since i have never done anything like this before and just spent a great deal of money on everything. theres no alternatives?

[torq455]

use a stock higher rate spring from comp cams, crane, etc.

[Syn]

use a stock higher rate spring from comp cams, crane, etc.

thats what i asked earlier and noone said anything. i'll have to get some prices

[torq455]

Also, the ID of the shim is .520, and the top part of the valve guide on the '99 heads (where the ID id this shim is located once seated, is over the "hump") is .515. The "hump" or where the guide is larger at the bottom is .550. See this image:



I suppose I have the general question about the .005" "play". Is there any danger to this?[/quote]

[tejohnson]

I'm confused.... Are you pointing out what I asked, or attempting to answer my question? Post seems a lil skewed...

[torq455]

Sorry.... I started to post then wasn't sure of a couple of things. A lot of newness here and not just with this particular example, but similar situation with similar heads. So in the middle of me submitting, I stopped it--or I thought I did. Personally, I don't see what .005" of play will do, it's all under at least 100# or more of psi briefly. Don't think there will be much movement. As far as that lip--it looks like the LS6 seat will rise up over that. Same with the slight overhang of the spring on the seat. I could be wrong, I'm learning too.

[tejohnson]

Here is why I ask: I'm learning myself

My original intent was going to be just using a shim. I was advised (by someone with quite a bit of knowledge) that I should use an ID locator, or OD cup to inhibit the spring from "walking" (even given the spring open and closed pressures).

When looking at possibilities, they are fairly limited. When I got my hand on some other ID locators which had a bit of a larger ID, I was cautioned by someone that is pretty knowledgeable with these heads, about the possibility of the excessive locator to valve guide clearance possibly causing excessive valvetrain chatter, and the potential of metal shavings due to them moving around the seat area excessively...

[torq455]

Ewwwww! Maannn...-sigh- I didn't want to hear that!!! Now I have all sorts of questions. Think I'll have to ask around here some. Not too many here have much to do with our engines.

[Syn]

Ewwwww! Maannn...-sigh- I didn't want to hear that!!! Now I have all sorts of questions. Think I'll have to ask around here some. Not too many here have much to do with our engines.

i know thats why i don't come here much

[SappySE107]

Makes no sense to me considering valve spring shims that sit on top of the spring seats (which are there so you don't gouge the aluminum) aren't right up against the valve guide. I haven't heard of any chatter issues with them. I gotta go to the machine shop tomorrow anyway so I will ask them what they know on this subject. I cannot believe that .005" is going to cause an issue with metal shavings or shatter. There is side loading on the valve guide but even that inst a lot of movement to be transferred to the spring.

[torq455]

That's what I thought, but don't know 100%

[AaronGTR]

ok i have the crane 272 and lifters, i have 2000 gen III heads, i will have lift over .500, since my heads are 2000, i am thinking i won't be able to use the ls6 valve springs, or maybe i missed that i could. what do you guys recommend?

Um... excuse me for being a jerk but I hate repeating myself ten times...



...YES! You can use LS6 springs. That what we've been talking about in this thread the entire time. You can use them on stock 3x00 heads and run up to AT LEAST .550" of valve lift safely. I have 2000 heads with LS6 springs, LS1 shims, and I'm running .526" lift.

I wish people would read the rest of the thread.


I agree with sappy on the spring shims too... 5 thousandths of an inch is very small. Thats normal tolerance for a part like that to even get it to fit over the guide. I highly doubt it's going to cause an issue.

[Syn]

ok i have the crane 272 and lifters, i have 2000 gen III heads, i will have lift over .500, since my heads are 2000, i am thinking i won't be able to use the ls6 valve springs, or maybe i missed that i could. what do you guys recommend?

Um... excuse me for being a jerk but I hate repeating myself ten times...



...YES! You can use LS6 springs. That what we've been talking about in this thread the entire time. You can use them on stock 3x00 heads and run up to AT LEAST .550" of valve lift safely. I have 2000 heads with LS6 springs, LS1 shims, and I'm running .526" lift.

I wish people would read the rest of the thread.


I agree with sappy on the spring shims too... 5 thousandths of an inch is very small. Thats normal tolerance for a part like that to even get it to fit over the guide. I highly doubt it's going to cause an issue.

i wasn't 100% sure what to do about shims, but thanks for helpin me out

[Rhedalert]

anyone figure out what spring seat would work for the '01+ heads?

[SappySE107]

http://iskycams.carshopinc.com/product_info.php/products_id/30869/950-VSL