madmike9396

iTrader: (29)

What is the best valves to put in lt1 heads the castings are 561 ? Also what is the biggest ? Thanks to anyone with info

ss.slp.ls1

iTrader: (36)

Manley Stainless Pro-Flo Valves 2.00" Int/1.56" Exh

madmike9396

iTrader: (29)

There is some guy selling some 1.94/1.56 on here would they work as well

madmike9396

iTrader: (29)

opps there 1.94/1.60

96capricemgr

iTrader: (1)

That is the stock intake size.


Real question should maybe be how do you define best?

Could mean lightest, strongest, best flow, most heat resistant, good at all but great at none making it a good balanced value????

madmike9396

iTrader: (29)

All of the above strongest,lightest,best flow etc..... So 1.94/1.56 is stock size ?

RamAir95TA

iTrader: (2)

Stock exhaust valve size is 1.50".

madmike9396

iTrader: (29)

So stock is 1.94/1.50 ? Im mixed up hopefully this is correct

ss.slp.ls1

iTrader: (36)

Yeah.

koolaid_kid

iTrader: (21)

I'm using 2.02 / 1/60 Manley SS valves. Lots o' breathing, very fine quality valves.

madmike9396

iTrader: (29)

i didnt think you could go that big

RamAir95TA

iTrader: (2)

You can, but you need to machine the valve seats.

madmike9396

iTrader: (29)

im thinking 2.00/1.60 What yall think ? idk thats why im asking

RamAir95TA

iTrader: (2)

That'll be fine.

madmike9396

iTrader: (29)

Would the seats need to be machined ?

RamAir95TA

iTrader: (2)

At the very least, if you're installing bigger valves, you need to have a valve job done to support the flow of the newer valves. In short, yes.

andysc

iTrader: (6)

With some work having to be done, you can use ls1 valves. They are 30percent or more lighter that lt1 valves. They are stock size, but keeping valve train weight down can pay big dividends, this is what I'll be doing come time to port and rebuild my heads.


hth

andy schuck

madmike9396

iTrader: (29)

Seems like a good idea

ss.slp.ls1

iTrader: (36)

Interesting, never heard of that before.

96capricemgr

iTrader: (1)

whether LS valves are lighter depends on the valves being choosen, a blanket statement doesn't really work.

I would not be so quick to assume a 1.600 valve will fit the seat, dig a little further before commiting to anything.