[ZR1] Rebuilding an LS9
04-12-2013, 08:29 PM
#21
Racer
Why on earth would you want to replace the ti rods with a steel one? Your 4 bolt setup is going to be the limiting factor not the rod. The ls9 ti rod is a pretty HD rod. Beefier than the ls7 and no one breaks those either.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
04-12-2013, 09:16 PM
#22
Why on earth would you want to replace the ti rods with a steel one? Your 4 bolt setup is going to be the limiting factor not the rod. The ls9 ti rod is a pretty HD rod. Beefier than the ls7 and no one breaks those either.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
04-12-2013, 09:39 PM
#23
The Consigliere
Member Since: May 2006
Location: 2023 Z06 & 2010 ZR1
Posts: 22,264
Received 5,458 Likes
on
2,274 Posts
04-13-2013, 03:33 PM
#25
Sorry old mother, is this a ls9 you are rebuilding or are you starting a fresh? If a new build i say go forged ls3. Well proven and loads of bits out there. If it's already a ls9 then there is good reason to use stick with the ls9 and get pistons.
The problem with strong motors is no one is willing to take them to bits and make stronger internals in case they are not as strong! Lol
The other thing is we need some of you gys with loads of cash to TT you ZR1s and turn the boost up till they bust! Then we would all know how strong they are. GM could be on to a winner here if the bottom end is stronger and cheaper than the compertion.
The problem with strong motors is no one is willing to take them to bits and make stronger internals in case they are not as strong! Lol
The other thing is we need some of you gys with loads of cash to TT you ZR1s and turn the boost up till they bust! Then we would all know how strong they are. GM could be on to a winner here if the bottom end is stronger and cheaper than the compertion.
04-13-2013, 05:57 PM
#26
Le Mans Master
04-13-2013, 07:39 PM
#27
Burning Brakes
Member Since: Aug 2009
Location: DFW Texas
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
No.I have a grand sport with a custom twin kit. Has a new ls9 long block with a custom piston and WCCH stage 2 ported new LS9 casting. Katech studs,katech ported ls9 oil pump. Made 23psi today at TI. Sam miller is the tuner and rebuilt the entire car when i got it back from another shop over a year ago. Taylor at DP Has re done parts of the kit. Car still has some left in it.
04-14-2013, 09:22 AM
#28
Le Mans Master
No.I have a grand sport with a custom twin kit. Has a new ls9 long block with a custom piston and WCCH stage 2 ported new LS9 casting. Katech studs,katech ported ls9 oil pump. Made 23psi today at TI. Sam miller is the tuner and rebuilt the entire car when i got it back from another shop over a year ago. Taylor at DP Has re done parts of the kit. Car still has some left in it.
04-14-2013, 10:22 AM
#29
Le Mans Master
Thread Starter
No.I have a grand sport with a custom twin kit. Has a new ls9 long block with a custom piston and WCCH stage 2 ported new LS9 casting. Katech studs,katech ported ls9 oil pump. Made 23psi today at TI. Sam miller is the tuner and rebuilt the entire car when i got it back from another shop over a year ago. Taylor at DP Has re done parts of the kit. Car still has some left in it.
04-15-2013, 06:43 AM
#30
Melting Slicks
Why on earth would you want to replace the ti rods with a steel one? Your 4 bolt setup is going to be the limiting factor not the rod. The ls9 ti rod is a pretty HD rod. Beefier than the ls7 and no one breaks those either.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
To the OP
I just did this in fact. I replaced the stock pistons with diamond coated 10 to 1 pistons. I had WCCH port the Ls9 castings. My car is twin turbo'd. Made 1105rwhp on 22psi yesterday.
04-15-2013, 11:29 AM
#31
Burning Brakes
Member Since: Aug 2009
Location: DFW Texas
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
Stock ls9
crank
rods
block
lifters
gaskets
heads(ported by WCCH)
The only thing i changed was the piston and it wasn't for strength. Just wanted a tad more compression. I'm confidant that at this power level the stock ls9 piston is plenty. With a stock stroke in these motors any piston is going to be pretty strong. The compression height of the ls9 piston is 1.443. This is due to the ls9 having a shorter rod. Which makes the assembly and piston that much stinger by design.
04-15-2013, 11:30 AM
#32
Burning Brakes
Member Since: Aug 2009
Location: DFW Texas
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
I'll bring the car out to cars and coffee next month.U ever go out there?
04-15-2013, 11:44 AM
#33
Burning Brakes
Member Since: Aug 2009
Location: DFW Texas
Posts: 845
Likes: 0
Received 0 Likes
on
0 Posts
how much torque are you putting down to the wheels?
04-15-2013, 01:36 PM
#39
Le Mans Master
04-15-2013, 01:52 PM
#40
Instructor
Member Since: Jun 2009
Posts: 204
Likes: 0
Received 0 Likes
on
0 Posts