teddyca

iTrader: (37)

So I am getting ready to pull the LS6 in my Z06 I blew last year and have it rebuilt so I can then put it for sale. I am thinking of spending a couple hundred on some heads for the motor just to make it more appealing to the potential buyer. I COULD spend $400+ on some 243's but I dont want to invest much if the seller has plans to change. I was thinking a nice set of 241s or 317s. Out of the heads available for say $200 that most people have laying around what would be your pick? I am leaning to 317s because alot of us including myself bought these only to have a tuner port them. Even if the seller doesnt want the heads it is easier for me to sit on $200 heads as opposed to $400 if that makes sense.

brian_rs/ss

you already have 243's......WITH the good valves. unless you damaged them when the motor let go???



i don't get what you're asking.

teddyca

iTrader: (37)

No sir. I HAD Lingenfelter heads on the car when my timing chain snapped and wiped out the heads, snapped those "good valves" etc... I am going to have the motor rebuilt and just put a set of inexpensive heads on it. I will assume the next owner will take the heads and use them for cores. Just want to make the motor look complete to sell as a long block as opposed to a shortblock. You know.

Sales2@Texas-speed

iTrader: (5)

If it's between the 241's and 317's, I'd go 241's for the bit better compression. Neither flow very well at all in stock form, so compression will be the only real advantage one over the other.

726.0chevelle

iTrader: (17)

just look around and call machine shops and ask for heads off of an 08 or newer silverado they are 243s or 799s thats how I got mine for a 150 or 200

HAZ-Matt

iTrader: (8)

The best factory head for that car would be 243's with hollow / sodium valves and LS6 springs.

I don't understand how most Z06 buyers would want a crappier head and valves than those that came on the car originally.

intenseblue

iTrader: (1)

243s are the best.

Duffster

iTrader: (103)

While I have heard nothing bad about the 243's, is there any justification for the infatuation with the magical 'sodium filled' valves? Is it both intake and exhaust valves sodium filled? For the effort to get/use sodium filled valves, does there a corresponding magical jump in torque or hp to validate their following?

intenseblue

iTrader: (1)

The intakes are hollow, exhaust sodium filled. HP gain from my reading of discussions is if there is any it's not large enough to claim. They are alot lighter though. Less valvetrain weight is always a good thing.

teddyca

iTrader: (37)

Dude read the OT I am not putting this motor back in my Z06. I am going to do an inexpensive rebuild and basicly provide the buyer some cores. Nothing more. The Z06 got a Forged LS6 with a set of Stage 3 PRC heads from Texas Speed. And as for the SF valves. The hell with them. 6 snapped when my motor blew. HAHA

intenseblue

iTrader: (1)

I answered your question. 243s are the best for the money. Even for resale you will not lose money probably gain more than the $100-200 extra invested when the longblock is sold.

You never mentioned you reused the old 243s on another engine. What I gathered from reading your post was that you had a longblock and didn't realize 243s were best. Figured you might have them confused with 241s. Many on this site have done that.

teddyca

iTrader: (37)

My bad bro. Many on this site just breeze through the thread and dish out nonsense. I apoligise for coming off strong. Yes the 243s might be ideal if the price is right. I can then sell the long block as a true Corvette Z06 motor. Something to think about. Here is the new beast. Looking at 500rwhp NA and 700hp on the bottle. No cheap heads here. HAHA

theevette

iTrader: (2)

Want to sell car as is

remauto1187

iTrader: (1)

And its just not limited to the Silverado. Tahoes, Yukons, Avalanches, Sierras and the list goes on. They put them on all kinds of 5.3L engines. (799/243 same thing) Try http://car-parts.com and search the salvage yards of the U.S. right at home! Most will ship too! Costs around $40 or so to get them shipped.

vettenuts

iTrader: (4)

Personally speaking, if it were me buying the motor I would want the original heads unless destroyed beyond repair. That way the damaged valves can be replaced, the heads can be fixed and brought back to full LS6 status. But that's just how I view things.

intenseblue

iTrader: (1)

Looks very nice.

teddyca

iTrader: (37)

intenseblue- Thanks for the compliment.

Unfortunately when the timing chain snapped it took out the heads remarkably the block was not damaged, but the heads were not worth saving to me. I am going to just hunt down a set of 243's and call it a day. thanks for incouraging me to spend more money guys. HAHA

HAZ-Matt

iTrader: (8)

I did...
With the unclear antecedent I thought you were selling the Z06 after rebuilding the motor. You didn't really say that you were not putting the motor back in the car or that you were just selling the motor.

The point still stands though. Are you going to advertise it as not quite an LS6, or not quite a "Z06" motor. It won't be unless it has the right assembled heads.

teddyca

iTrader: (37)

I Fully agree Matt. I would NEVER sell it as a Z06 motor with 241, 317, etc... heads on it. The motor would be sold as a LS6 block with XXX heads. Looks like I am going to look for a deal on some 799's or just get a set of 243 heads so it is still a Z06 motor.

brian_rs/ss

there is a ton of justification. you think GM made them just for ***** n giggles? and what about all the light weight aftermarket valves? (hollow and Ti)

there is definitely something to be said for a proper, light weight valvetrain.

https://ls1tech.com/forums/advanced-...-lift-etc.html

and that ^ is a sticky btw.