Identify turbo exhaust valves

[overlordsshadow]

How can I tell?

[turbovanman²]

Older ones had a T stamped on the face, after that, no way of telling without getting the metal tested. If in doubt, just install new valves, there like $10 each,

[overlordsshadow]

Crap deal. Bought a head from a local TD guy who knows I'm using it on a turbo ap and most likely built it for his turbo car. Thing is he had it pressure check, planed, blasted, and cleaned but no 'T's on the valves. Trying to get ahold of him but his phone must not be working. Have those rings got there yet? I'll probly have some spare ones and pistons lol. The head is not the only thing that melted.

[shelby zed]

yea, i thaught they had ts on them

[turbovanman²]

yea, i thaught they had ts on them

That stands for Tapered Shroud and will be stamped on the drivers side of the head.

Yeah, got the rings thanks. I should have just sold you them, my Wiseco plans fell thru,

[overlordsshadow]

Well I only needed one and I sent you back 3 of yours since a set for 1 ring is $40! So if my head has 'TS' stamped in it I'm good to go?

[shelby zed]

ill check mine when i get home for you, ive got a couple turbo heads

[overlordsshadow]

THX This ones is marked all over with stampings and such. It is an older one for sure.

[moparfwdsleeper]

I thought it was the intake valves that had T's on them... Ill have to go double check now

[turbovanman²]

I thought it was the intake valves that had T's on them... Ill have to go double check now

Nope, intake valves are the same for both engines.

[moparfwdsleeper]

The T is on the intake valves on one(and all) of my 88 turbo heads(only have 88 year ones, dont know about the others)....

[turbovanman²]

The T is on the intake valves on one(and all) of my 88 turbo heads(only have 88 year ones, dont know about the others)....

Good catch but it doesn't matter for the intake as its cooled by the intake charge,

[moparfwdsleeper]

Simon your correct lol You left that in a hard spot to reply back

Hope this doesnt read wrong...

I was right on which valves had the T lol sorry bro had to glout(sp?) lol
Simon is 100% correct on the intake valves not mattering.

The exhaust valves I still don't know how to tell them apart. I don't know how to test the metal or have a metal tester on hand... What metals on in the TBI valves compared to the Turbo valves?

[JDAWG]

I thought someone was talking a while back that you could wiegh them

[moparzrule]

I've had T's on the exhaust valves and the intakes.

[Aries_Turbo]

i know my SBI replacement valves have inconel heads.... the stem is magnetic... the head is not. Im going outside to test some valves with a magnet just to see.

my stock factory exhaust valves are non magnetic... I dunno if TBI are the same as I only have one TBI head and its on a motor right now. But i bet if a magnet sticks to your exhaust valves (like they stick to an intake) there is a good chance that they are TBI valves. stick the magnet in the center.... itll stick to the valve seat even if its a turbo exhaust valve so stick it in the center.

Brian

[turbovanman²]

What about stainless valves?

[Aries_Turbo]

stainless are usually non magnetic too. you dont really want a total stainless valve unless it has hard steel lash caps.

Brian

[zin]

IIR, the factory turbo valves are inconel, and would be non-magnetic, so there's an easy test, magnet sticks, can't be a turbo valve, doesn't stick (and is factory) its a turbo valve. Stainless can be trickier as there are magnetic and non-magnetic stainless steels, but as mentioned earlier, you really don't want stainless anyway, inconel is much better in a turbo application.

Mike

[Directconnection]

What about stainless valves?

A stainless valve is still magnetic. Stainless isn't magnetic, but a SS valve is as it's not 100% SS.

Only the exhaust valves will have a "T" cast into the faces if turbo. On the SDML years back, there was a thread about the "T" on them. Some people had pulled their heads off of turbo engines that were original from the factory and the exhaust valves didn't have the "T" on them.

The "T" wasn't just the older ones, though. I have seen them on both of my '90 VNT Shadows.