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stock ls6 turbo...

Old 06-16-2015, 10:41 PM
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Default stock ls6 turbo...

I have a 2005 ctsv ls6 that I'm going to be turboing. It's 100% stock internals and since it's a daily driver, I want to be at 500-550whp. So I have a couple of questions first.

1. On3 76mm or gt45?
2. its going to be a single turbo, is 2.5" hot side too big? Would 2" be better? I'd like it to boost around 3000 rpms.
3. Since I don't have much room, is it OK for the crossover pipe go directly into the header and both exhaust gases come out of the one header outlet? Or do both side piping have to go directly to the turbo?

Any help would be much appreciated!!
Old 06-17-2015, 12:30 AM
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1) Depends where you plan on mounting it- but the China45 wont fit anywhere under a Gen1 V's hood without removing accessories.

2) If your talking cross over pipes, either will work for those power levels-2inch would be significantly easier to fit.

3) Either will work, but option 2 is preferred to try and keep back pressure on both banks the same.
Old 06-17-2015, 01:02 AM
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Originally Posted by coltboostin
1) Depends where you plan on mounting it- but the China45 wont fit anywhere under a Gen1 V's hood without removing accessories.

2) If your talking cross over pipes, either will work for those power levels-2inch would be significantly easier to fit.

3) Either will work, but option 2 is preferred to try and keep back pressure on both banks the same.
Awesome thanks. I relocated my fusebox to the factory battery location and put the battery in the trunk. I have plenty of room for the turbo now, it's the piping that had me alittle worried, but I'm glad I could run 2" with no problems.
Old 06-17-2015, 11:12 AM
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Also should I bother with meth just as a precaution? Last thing I need is it blowing up and hearing the wife " u see, I told u to leave it alone" haha

Last edited by RecklessV; 06-17-2015 at 11:40 AM.
Old 06-17-2015, 03:15 PM
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Why are you going to put a junk turbo on a V?
Old 06-17-2015, 04:22 PM
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Originally Posted by SM105K
Why are you going to put a junk turbo on a V?
Maybe its a Junk V.

I plan on turbo'ing mine if time allows this winter. Got it for 10k Cash, 2 year ago, and it has cost me $0 besides oil and gas, so I figured she has earned the right to make some JAM.

Originally Posted by RecklessV
Awesome thanks. I relocated my fusebox to the factory battery location and put the battery in the trunk. I have plenty of room for the turbo now, it's the piping that had me alittle worried, but I'm glad I could run 2" with no problems.
Please post pics!! I planed to rear mount mine with an independent oiling system.
Old 06-17-2015, 05:04 PM
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Originally Posted by SM105K
Why are you going to put a junk turbo on a V?
Because it's a 10 y/o car and just my regular daily driver, plus I only put 5-8k miles a year on it and there's a lot of people running both turbos with great success. So hey why not? If it blows, it was only $200-$300 I can always buy a better one down the line.
Old 06-17-2015, 05:07 PM
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Originally Posted by coltboostin
Maybe its a Junk V.

I plan on turbo'ing mine if time allows this winter. Got it for 10k Cash, 2 year ago, and it has cost me $0 besides oil and gas, so I figured she has earned the right to make some JAM.



Please post pics!! I planed to rear mount mine with an independent oiling system.
https://ls1tech.com/forums/cadillac-cts-v/1743507-monstrosity-i-ve-done-v2-lower-grille-v1-bumper.html

that's my thread, it shows the relocation of the fusebox.


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