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Discussion Starter #1
I just purchased a 2008 STS awd with a blown engine. In your expert opinions would you

A - purchase a crate 4.6
B- buy an available used 4.6 with 70k miles
c- rebuild the engine in the car

I would like to make the car as fast as I can with the budget I have. Do you recommend headers or turbo or both?
When it comes to after market exhaust, what is the best option? I had Banks in my last vehicle and loved it but am open to suggestions.
Thank you!
 

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2006 STS4 4.6L
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Aftermarket exhausts are limited to Borla and Corsa, and I think at least one of those are discontinued, your other option is a custom exhaust. Headers would have to be custom, will be expensive and a nightmare to install. At least a tune will be required with a turbo, and that will be an expensive project. Basically the only advantage your car has over an STS-V is the AWD, so the only reason you should keep it is if the AWD is a must have, if it isn't then you should pick up a V.
 

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Discussion Starter #3
Aftermarket exhausts are limited to Borla and Corsa, and I think at least one of those are discontinued, your other option is a custom exhaust. Headers would have to be custom, will be expensive and a nightmare to install. At least a tune will be required with a turbo, and that will be an expensive project. Basically the only advantage your car has over an STS-V is the AWD, so the only reason you should keep it is if the AWD is a must have, if it isn't then you should pick up a V.
Good advice , many thanks!
 

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2006 STS4 4.6L
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No problem at all, I've been looking into upgrades for some time and they are essentially all custom & expensive at best and a total waste of time at worst. Don't get me wrong, I will get some tuning done, and I'm also curious about headers & turbocharging, but I think the best option for forced induction will be of the TorqAmp variety. Some people may knock the idea of the electric turbo/supercharger, but the TorqAmp ones seem pretty legitimate and have been shown to have good potential.
 

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Discussion Starter #5
No problem at all, I've been looking into upgrades for some time and they are essentially all custom & expensive at best and a total waste of time at worst. Don't get me wrong, I will get some tuning done, and I'm also curious about headers & turbocharging, but I think the best option for forced induction will be of the TorqAmp variety. Some people may knock the idea of the electric turbo/supercharger, but the TorqAmp ones seem pretty legitimate and have been shown to have good potential.
Interesting angle, after thinking it over for about 15 seconds I am on board with your TorqAmp idea... as opossed to custom fabricating headers and slapping them on “Jimmy
Rig” style... Another factor to run past you. If I am to keep the AWD aspect of the whip, and tune it which is a 100% chance, whether it be a supercharger/turbo, custom headers or NOS,
Will the factory equipment be able
To handle the increase made by the added ponies and torque? Timing chain right down the line.
any thoughts there?
 

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2008 STS Northstar RWD, 2000 Trans Am WS6 6 spd, 1968 LeMans convertible 6.6
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Interesting angle, after thinking it over for about 15 seconds I am on board with your TorqAmp idea... as opossed to custom fabricating headers and slapping them on “Jimmy
Rig” style... Another factor to run past you. If I am to keep the AWD aspect of the whip, and tune it which is a 100% chance, whether it be a supercharger/turbo, custom headers or NOS,
Will the factory equipment be able
To handle the increase made by the added ponies and torque? Timing chain right down the line.
any thoughts there?
I would say it would be able to handle the extra 75 or so HP, beyond that it would get iffy, and you would upgrade whatever breaks. I know the V has a stronger transmission and I think the differential is also. As well as bigger brakes/cooling systems etc. Like Aeg says, custom headers would get expensive. My STS already has some Gibson mufflers, it sounds about perfect I think and so do my car buddies. NOS would probably be the quickest way to get that 75.

If you want a low 13s STS, get a V. If you are content with mid to maybe a 14.0 1/4 mile time at about 100MPH, you can achieve that with the Northstar. I changed my 2.73 gears to 3.23, got a tune from a local guy, last summer she ran 7 times at the dragstrip on a warm summer evening and had a couple 14.4 runs at 99MPH, the others were all 14.5-6 at 95. I have RWD, so it is about 200? lbs lighter than the AWD cars. Had good launches, not much wheel spin. Not bad for a 3950 lb car, really. I don't fear stock Chrysler 300s or Dodge Chargers/Challengers with their 5.7 Hemi. Or even the mid 2000s Mustangs.

More power is always nice. I was looking at camshaft options for my 68 LeMans this morning, lol.
 

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2006 STS4 4.6L
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In my opinion, the system is built to handle a good amount more power than is actually offered, but I don't know what that maximum amount is. Could it handle up to 400 hp? Maybe, maybe not.
Two of the TorqAmp units will probably be a necessity, fortunately an intercooler is not required as the intake air temps will still be relatively low, but I believe you can use one for a slight drop in intake air temps which will give you some power, but good luck setting up an intercooler in this car LoL.
 

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2006 STS V8 AWD, '95 Ford Ranger
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The quickest way to faster times is to reduce weight.Gut the interior and throw away the seats and everything else that will unscrew.
 
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