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Old Feb 3, 2025 | 08:54 AM
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Default LS2 Power

What would it take to get a 05 M6 to around 450whp?
The car already has a Vararam intake, long tubes, catless X-pipe and corsa sport exhaust.
Don't want to go forced induction.

And yes I've heard about a 100 times..... sell it and by a LS3 price difference around here between a ls2 car and a ls3 is pretty huge(10k) lol
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Old Feb 3, 2025 | 08:57 AM
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What are you making now? That would be helpful

A cam at minimum is needed. Maybe heads to be 100% sure you hit that goal.
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Old Feb 3, 2025 | 09:08 AM
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Originally Posted by PMPerformance
What are you making now? That would be helpful

A cam at minimum is needed. Maybe heads to be 100% sure you hit that goal.
Agreed that a current # would be helpful, cars in storage right now(Canadian winters SUCK lol)

Was planning on getting a cam, but not sure which one yet

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Old Feb 3, 2025 | 09:18 AM
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Ported 243 heads or aftermarket, a fairly rowdy cam, and supporting mods to handle it should do the trick. 450 isn't an unreasonable goal but dont get hung up on numbers. What do you do with the car? Are you drag racing, road racing, just cruising and want some more sauce? I would say unless you're racing the car stick with something a bit milder and don't get hung up on horsepower numbers.

I'd rather have a car that makes 420hp and has good street manners than a max effort build that makes 450hp and drives like ****. Just speaking from my own experience. I kept things on the milder side this time with my LS3 and I'm glad I did, the car has near stock drivability and still sounds and runs great. My Trans Am had a fairly rowdy cam in it and it was a pain in the *** to even move around a parking lot. I can tell you which of the two setups I got more joy out of and it wasn't the Trans Am.
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Old Feb 3, 2025 | 09:28 AM
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Originally Posted by StayinStock
Ported 243 heads or aftermarket, a fairly rowdy cam, and supporting mods to handle it should do the trick. 450 isn't an unreasonable goal but dont get hung up on numbers. What do you do with the car? Are you drag racing, road racing, just cruising and want some more sauce? I would say unless you're racing the car stick with something a bit milder and don't get hung up on horsepower numbers.

I'd rather have a car that makes 420hp and has good street manners than a max effort build that makes 450hp and drives like ****. Just speaking from my own experience. I kept things on the milder side this time with my LS3 and I'm glad I did, the car has near stock drivability and still sounds and runs great. My Trans Am had a fairly rowdy cam in it and it was a pain in the *** to even move around a parking lot. I can tell you which of the two setups I got more joy out of and it wasn't the Trans Am.
Thanks that is helpful!

Really its a weekend driver, live out in rural ontario, so no traffic to contend with. I guess the occasional auto cross/track day(2 or 3 a year), and mostly need to keep ahead of my brother with a bolt on 23 Mustang GT LOL.
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Old Feb 3, 2025 | 09:39 AM
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Originally Posted by Canadian_vette
Thanks that is helpful!

Really its a weekend driver, live out in rural ontario, so no traffic to contend with. I guess the occasional auto cross/track day(2 or 3 a year), and mostly need to keep ahead of my brother with a bolt on 23 Mustang GT LOL.

Yeah man for sure. Honestly (I'm not sure if they make it anymore) but a Texas Speed 228r would be a good Cam for what you want to do. Plenty of chop, good drivability, works well with the 243s. Just do yourself a favor and go to a Johnson short travel lifter. Its good insurance and you'll never have to worry about them again.
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Old Feb 3, 2025 | 10:12 AM
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Originally Posted by Canadian_vette
Thanks that is helpful!

Really its a weekend driver, live out in rural ontario, so no traffic to contend with. I guess the occasional auto cross/track day(2 or 3 a year), and mostly need to keep ahead of my brother with a bolt on 23 Mustang GT LOL.

Just invite him to a backroad or roadcourse, **** even a dragstrip.
Corvettes make up in weight, what they may lack in power and a 10spd
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Old Feb 3, 2025 | 10:20 AM
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Originally Posted by PMPerformance
Just invite him to a backroad or roadcourse, **** even a dragstrip.
Corvettes make up in weight, what they may lack in power and a 10spd
I dunno those Coyotes with a few bolt ons and a 10 speed are nasty lol. I've ran a few now and It's usually whoever gets the hit. They really work at the drag strip if you throw a tire on them. Put em on a little bit of corn and its over.
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Old Feb 3, 2025 | 10:32 AM
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Just get a Maggie and never worry about the mustang again unless he buys a whipple.
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Old Feb 3, 2025 | 11:50 AM
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Originally Posted by StayinStock
I dunno those Coyotes with a few bolt ons and a 10 speed are nasty lol. I've ran a few now and It's usually whoever gets the hit. They really work at the drag strip if you throw a tire on them. Put em on a little bit of corn and its over.
Thankfully he's a manual as well lol
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Old Feb 3, 2025 | 11:53 AM
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Originally Posted by FAUEE
Just get a Maggie and never worry about the mustang again unless he buys a whipple.
I know he'll never put a whipple on it....he's to cheap!! with the dollar conversion right now its 15k just to buy the whipple
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Old Feb 3, 2025 | 11:54 AM
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With a FAST intake manifold and ported heads, it's fairly easily done without too nasty of a cam. Easier yet if you bump the static compression ratio up to the mid 11's. That's assuming you have decent access to premium fuels (93 octane or there abouts).
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Old Feb 3, 2025 | 12:06 PM
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Originally Posted by Canadian_vette
Thankfully he's a manual as well lol
Oh well then he's only a shift or two away from grenading it lol, damn MT82s... great shifting trans, poor holding together trans lol.
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Old Feb 3, 2025 | 12:15 PM
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Originally Posted by Canadian_vette
What would it take to get a 05 M6 to around 450whp?
The car already has a Vararam intake, long tubes, catless X-pipe and corsa sport exhaust.
Don't want to go forced induction.

And yes I've heard about a 100 times..... sell it and by a LS3 price difference around here between a ls2 car and a ls3 is pretty huge(10k) lol
If you accept the fact that your most effective way to get there is a Cam you are going to need to work with a tuner anyway. The advantage of selecting one to work with before the mods start is you can baseline exactly what you have at the rear wheels now. In addition, you and your tuner can work out options for getting to your desired goal which in the long run will save you both time and money.

I think you already started "planning" by asking for thoughts and experience. For me, the next step is getting the data you need from the car you have so that you and a tuner can together design a solution and hits your mark the first time rather than throwing parts and labor at it later. Good luck and enjoy the process. It can be very rewarding when you know you've done your homework and it all comes together as planned.
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Old Feb 3, 2025 | 02:22 PM
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Originally Posted by StayinStock
I'd rather have a car that makes 420hp and has good street manners than a max effort build that makes 450hp and drives like ****. Just speaking from my own experience.
This man speaks truth. I wouldn't recommend you getting an LS3 engine, but I would say for your N/A goals to get a set of stock LS3 heads, factory intake, and a small cam. The LS2 to LS3 horsepower delta is not primarily in the difference in displacement, but rather the janky LS2 intake and head flow. On my first LS2, I went with a ported FAST 102, ported TB, ported PRC cathedral heads. cam, etc. If I had I to do it over again, I would have gone with the stock LS3 top end and let the blower do the rest.

Lesson learned, never again. Push the air into the motor and call it a day. I know you said you didn't want to go F/I; but if I were you, I would leave your LS2 alone and get an ECS or AA centri kit and be done. You will smoke the stang and remain very reliable with perfect street manners. If you desire more later, then go with the LS3 top end with supporting mods. I was also anit-F/I when I started but it really is hard to beat for the cost to performance ratio.
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Old Feb 3, 2025 | 04:45 PM
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Cam and a FAST intake manifold
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Old Feb 3, 2025 | 05:10 PM
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From what I’ve seen on the interwebs, the intake manifold is big upgrade on the LS2.
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Old Feb 5, 2025 | 11:42 PM
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A & A S/C........bolt on 140-150 HP......will get you to 430+ rwhp without having to break down the engine.
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Old Feb 6, 2025 | 07:27 AM
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Originally Posted by DrKrieger
A & A S/C........bolt on 140-150 HP......will get you to 430+ rwhp without having to break down the engine.
FI is not an option at the moment, the canadian dollar sucks!!!

A cam and supporting mods is around $4K CND installed and tuned..... Supercharger is roughly $6K USD? that's almost $10k CND not installed or tuned

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Old Feb 9, 2025 | 04:17 PM
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My LS2 is at 440hp at the wheels. That's with cam, headers, ported throttle body, ported stock intake, Vararam with spacer and 3" exhaust.
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