LS6427

iTrader: (2)

390ci, LS1 ported heads, 9.5:1 cr, 93 octane + meth............

18psi boost

.

CraZee ZO6

very simple answer... inconel turbo valves. thats why i used in my sleeved ls 427 build.

miatainthe10s

^^^^^ 100% agree. I bought inconel valves when I got the turbo.

LS6427

iTrader: (2)

Just curious......

What happens to regular stainless valves under 18psi...over time?

.

stevieturbo

Boost pressure is irrelevant, EGT's and chamber temps are relevant.

IMO Inconel should be used for any turbo setup. Although perhaps E85 or methanol fuelled cars might run cool enough that it becomes less important.

I'd still use Inconel anyway. I even have them in my supercharged setup.

dirty_old_chevy

Doesn't GM use sodium cooled exhaust valves in the LS9? Is this another option in a nasty setup?

stevieturbo

it is, but by nature a sodium cooled valve will always be a 2 piece.

Inconel can still be a 1 piece valve. So if high spring rates etc are used, a 1 piece valve is always going to be preferred

So I guess springs and camshaft choice also play a part.

LS6427

iTrader: (2)

So...which brand should I get?

Or is Inconel the brand name/company name?

Who has the best pricing?

***** I will have a FMIC and meth....18psi.

.

stevieturbo

Inconel is the material used.

Havent a clue who makes difference valves.

Nitroused383

iTrader: (10)

I would run the stock valves with the stock castings. Lifting the heads will be an issue before you have problems with valves. Save your money for a thick deck head as it seems a waste to drop some big coin in a stock casting.

ittwgn

hi mate you have the answer with inconel valves but agree with n383 also depending on budget etc !!!!! off topic but just for more info what turbo with 18psi are you hoping for that power ??? cheers

LS6427

iTrader: (2)

So I will have no issues with heat and stock valves.....? Street car.....it will be driven on weekends.

I'm just using the stock ported LS1 heads because many people have told me its all I need for 18psi.

.

LS6427

iTrader: (2)

91mm

Not sure of the brands and model numbers.....my turbo guy knows all that stuff. He might even have another size he will go with......????

I want a fast spool, little lag as possible. 50-160 blasts on the highway, thats it.

.

stevieturbo

91mm will hardly be that fast spooling surely ?

And heat will largely depend on tuning, fuel used and setup.

LS6427

iTrader: (2)

We still have lots of time to choose a turbo.

.