Wasser rebuild time

[fusername]

TCL, any reason you choose TRW over SI valves? SI is so easy to shop with, and came well reccomended (for ACVW apps, but it crosses over I am sure) i never even bothered looking into TRW, who I know bob donalds used to use from time to time, which is a good plus in my book.

[tencentlife]

I think it was asked already, what is SI?

[jackstraw]

Name brand. Manley, TRW, Eaton, SI, J-Loy, etc.

[fastback]

if u use a a magnet on the stock WBX exhaust valve (sodium filled )the stem is magnetic , but the "head" of the valve is not magnetic
so it seems to be stainelss steel "head" spliced to the stem ?

[tencentlife]

Name brand. Manley, TRW, Eaton, SI, J-Loy, etc.

OK, first I've heard of them. I looked them up. Now I know about them. Before now I couldn't say why I would choose TRW over them, having never heard of them. Now I can say, and it's not for cost-containment, I can assure you. They're one-piece valves. That's why they're so cheap. That's fine for intakes, maybe for exhausts in toy engines that get torn down frequently, but my perspective is different than a lot of people here. I build liquid-cooled truck engines for long heavy duty service, a 2.2 liter NA engine pushing a large heavy box thru the wind over any kind of terrain for years and years. I want a welded valve because an exhaust valve in hard extended use demands the two opposite characteristics of autensitic and martensitic alloys that only a welded valve can have. OEM's use welded valves for those same reasons; I don't think you will find a one-piece exhaust valve in a production vehicle. I could buy those cute one-piece valves and pocket $120 more on every engine job, but I do my customers better than that, it doesn't just have to make it out of warranty, it has to serve them for a decade, minimum. So that's why I don't use SI, or any onepiece exhaust valve.

There, how's that?


Here's a bewildering overview of some of the things to consider in valve selection:

http://www.enginebuildermag.com/Article ... lloys.aspx

As fastback says, put a magnet to the stem and head of an exhaust valve, and you can tell if it's a welded valve or one-piece.

[fusername]

interesting. I actually do not go with SI for price, but simply because they came recommended in the T4urm. sorry i didn't clarify sooner that that was brand name, I had a bag of em labeled simlpy "si" I got in a box of parts, and assumed it meant stainless valves, only to realize you don't abbreviate stainless SI
Valves are one of a short list of parts including bearings where I will not simply choose the cheaper route, because they are important, and when they fail they like to take things with them. Maybe next tiem I order from SI I will ask them thier take on one piece and why they choose to make em. the sales staff has been awesome so far, a real 10 on customer service and getting me the parts I need even when I don't know what I need. I have yet to run a motor with thier valves, but as I said I picked them on recommendation, specifically thier swirl polished line.

so you stand behind TRW in high demand apps, specifically WBX use, as being a quality part? I konw you are a guy who does his homework, so I will even llisten to you, even if you live in the WBX forum.

[pocketrocket]

Hi guys, I make a great tool that go's in to the piston pin to pull the pin out of the pistons in the waterboxer engines. I also do the new AMC head upgrades as talked about in this thread. TRW are the valves I use in my head upgrades, along with blending ports, checking guides and regrinding seats as needed to get a much better and longer lasting head. I also do rod rebuilding with the bug style bolts and 1mm off set rods so you can put in the 96mm P&C sets to get the piston to go all the way to the top of the cylinder. I sell many of the parts on thesamba. Thanks Rocky

[buildabiggerboxer]

Gents, some great info coming out, what do you think.. a bit off topic, so forgive me, but i'm having trouble getting retainers over here u.k side, bug ones, even hi po aftermarket are not suitable for a wasser, which as you know are tight on valve spring height, all the cromo stuff shortens up the install too much, and i need all i can get with a web 86c and 1.4 rockers, but i have found the AMC retainers look a good bet for my purposes, they are obviously machined rather than stamped like the o/e german ones where, and they are a lot harder with the 'file tester' i use! ive pulled .565" lift with enough spare on coils and piston to valve clearance so they look like they will get the nod, ive already sunk the valves to get to this point, the AMC retainers have about plus .080" over T1. revs will go to 7200 , what do you guys think?