ssdungeon

iTrader: (24)

I have a few questions so I know what I need to start ordering before this swap.

I have a 2000 Lq4 complete motor bottom end has been freshened up with ARP bolts.....

I also have my LS1 which needs the bottom end refreshened it runs but has no oil pressure due to bearings.

I am planning on taking my 24x/24x cam , and my ported heads and move them to the 6.0.

I have hardened 7.4 pushrods, im sure the heads will be fine. Not sure if I need to swap the push rods or anything else before we tear in next week. From what I have read, the alternator bolt tap is the only thing that will change. If anyone else has done sucha swap please let me know what I might run into.

The CAM is great on HP up top and hopefully the extra cubes will give me a little more torque down low which I could use. I had a choice between rebuilding my 5.7 or going with the heavier 6.0.

42lb injectors, 3"ory, 3" cutout, ASP pulley, Fast 90/90, S2 heads, big cam, racetronix.... well you see the sig so I think its all there. Man I hope I dont get slower from doing this.

Any guesses where my HP would be. I am hoping/needing 450RWHP with the extra weight up front.

mark21742

I'd guess you'll gain around 20tq/hp acrossed the rpm range with the lq4.
I pulled my heads and 238/242 cam out of my ls1 and put them in my 408 and with the extra cubes the setup is A LOT more street friendly

Justus67

iTrader: (3)

What size combustion chambers are you running in you ported heads?

Justus67

iTrader: (3)

Also are you A4 or M6?

ssdungeon

iTrader: (24)

Not sure if you were talking to me or mark I have a M6.

Justus67

iTrader: (3)

To you, keep in mind your pistons are dished .011. So you'll lose some compression thats why I was asking about your heads. Also the 4L80E is a direct bolt up to the LQ4, thats why I was asking A4 or M6. Do you have 317's on the LQ4? If so, they have 64cc combustion chambers and can be milled .025 -.030 to bump up the compression and still maintain a larger combustion chamber.

ssdungeon

iTrader: (24)

I am using my LS1 heads I have 317s on the motor now but they come off my stage 2 ls1 heads will go on this block to raise my compression some. Hoping I dont have a problem with clearance because of the cam size. Other than the ARP bolts its basically a stock block getting a 24x/24x .610 cam installed with LS1 heads.

2000TransAmWS6

iTrader: (12)

i just did the swap from an LS1 to a LQ4, and my set up is VERY similar to yours. i only have 600 miles on my new motor, and no dyno number yet. the car does feel like it has more torque but it also does feel a little heavier and does seem to sit a little lower.

Justus67

iTrader: (3)

The LQ4 adds some wieght up front for sure, but the extra cubes help more than the weight hurts. Plus you have the extra strength of the iron block.