#5364 castings, I sent them my GM #12569427 hollow stem LS3 valves and they finished everything off, including hand blending the bowl area. I had them milled .030" to a 69cc chamber after porting. I cant wait to get this thing back together!!
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
Last edited by SweetS10V8; 03-14-2009 at 02:50 PM..
They look great! What is your compression going to be with 69cc chambers?
My calculations say 10.47:1. Although I am assuming how far my pistons stick out of the hole at this point. I havent removed the old heads yet to see. Im assuming .004" in my calculation.
Quote:
Originally Posted by Beaflag VonRathburg
The CNC work looks nice. How much material did they remove from the runners? What is the rest of the combo?
The intake ports went from 261cc to 275cc
The exhaust ports went from 89cc to 92cc
6.0L LQ9 shortblock
1 3/4" Long tubes (coated)
Mandrel 3" dual exhaust with Flowmaster 70 series (BigBlockII) Mufflers
Comp Cam LSR cam 219/227 or 223/231 both right around .610 lift, havent decided yet.
Comp .105" wall pushrods
Comp 26918s, new Silver ones
Ti or Tooled steel retainers
FAST LSXR intake (when it releases)
TCI 25% UD Pulley
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
My calculations say 10.47:1. Although I am assuming how far my pistons stick out of the hole at this point. I havent removed the old heads yet to see. Im assuming .004" in my calculation.
The intake ports went from 261cc to 275cc
The exhaust ports went from 89cc to 92cc
6.0L LQ9 shortblock
1 3/4" Long tubes (coated)
Mandrel 3" dual exhaust with Flowmaster 70 series (BigBlockII) Mufflers
Comp Cam LSR cam 219/227 or 223/231 both right around .610 lift, havent decided yet.
Comp .105" wall pushrods
Comp 26918s, new Silver ones
Ti or Tooled steel retainers
FAST LSXR intake (when it releases)
TCI 25% UD Pulley
Go with the 223/231. I run a 224/235/610/620/115 and it idles perfect in an A6, I wish I would have gone a bit bigger actually (230/240). My plan was LS3 heads as well with a 150 shot, as the reason for the big split. Ended up with TEA 243's but kept the split for the N20.
The porting in the chambers removes material, IIRC they were 74cc after port work, then I had them milled.
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
I don't want anything larger, there's no reason for it at this point. Cams are cheap and easy if I change my mind.
Initially I was going for the 215/223 LSR cam to keep it as quiet as possible but yet have all kinds of Torque and power.
Ive run a 215/223 LSK lobed cam before and it didnt reach peak power until 7200RPM in a 5.7L, and I have no intention of turing more then 7000. Larger just means louder and more obnoxious. I want tame and easy to drive, that's why I made sure to get great heads to help make lots of power without having much camshaft.
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
Last edited by SweetS10V8; 03-15-2009 at 04:41 PM..
Heads look awesome. Could you post some pics of the intake bowl and short turn radius?
__________________ Aaron
'03 Electron Blue Corvette Z06
The normal stuff.....
EFI-101, EFI Advanced, EFILive-101, Variable Camshaft Tuning
EFI University Evangelist
that's why I made sure to get great heads to help make lots of power without having much camshaft.
Do you realise you are abnormal?
That's far too logical a way to think.
If you go with the flow, you have to buy the biggest cam you can find (coz big numbers mean something) ....f+^k the heads.
Then when yer done say "Hello bucking bronco!"
Ah, no problem amigo, ...just patch it up with a looser converter and or some magic tuning software.
I don't wanna hear anymore about these piddling pea-shooter cams, okay!
Ive decided to go with the 223/231 .610/.617 112. It should be here in a few days.
__________________
Quote:
Originally Posted by John Lingenfelter
The world's best cam combined with a poor set of heads will produce an engine that's a dog. But bolt on a set of great heads even with a poor cam, and that engine will still make great power.
heads look great man im trying to make my mind up on my heads as we speak. The small cam and great flowing heads is the exact same way i think my 427 is going to be in the 230 to low 240 range. if you don't mind me asking whats the price on a set of them?
have u considered the LPE GT11 cam? i have a theory that it will work excellent with l92 based heads. i have had excellent results with it in a stock cathedral port head and 6.0. it was very responsive and aggressive for such low duration. im thinking of building a l92 375ci with this cam but single plane and carb.
I got my Lingenfelter CNC LS3 heads.. 
