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Discussion Starter · #1 ·
Just discovered DDM and Trifecta both offer tunes for the 2.4, haven't read many posts about them and was wondering if anyone has one of them and how much HP is gained. Also, is a 2.4 tune recommended if you TC/SC the 2.4?

TIA
 

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If you TC or SC a 2.4, you absolutely need to re-tune the ECM. DDM offers that as part of their kit, and I'm sure Werks, Hahn and others do the same.

Don't forget about Westers Garage either. IMHO his tunes are simply the best. I started with a Werks tune - before SC, then DDM with the Stage 2 SC kit. My Stage 3 kit was a little fussy and I elected to call Lyndon Wester. He sorted it out and it runs like a champ.
 

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Discussion Starter · #3 ·
DDM says it adds 5HP to rear wheels, didn't seen Trifecta HP indicated. Surprised with the 2.4 TC/SC thread that the need to tune the 2.4 hasn't been mentioned (unless I missed it).
 

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DDM says it adds 5HP to rear wheels, didn't seen Trifecta HP indicated. Surprised with the 2.4 TC/SC thread that the need to tune the 2.4 hasn't been mentioned (unless I missed it).
Every TC or SC setup includes a tune when it is for the 2.4.
 

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Discussion Starter · #5 ·
So there's really no benefit in buying a 2.4 tune if you're not TC/SC?
 

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Well , I couldn't feel the 15HP gain that Werks stated at the time. So I would say no.
:agree:

On a 2.0, a $200 tune will get you 30 - 40 horsepower. On a 2.4, that same money will only get you 7 - 15 horsepower, hardly noticeable.

.
 

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Hi there - I had read (somewhere on this forum) that the 2.4 tune (non TC/SC) was more about removing the GM 'nanny' settings and that the throttle response was improved - I seem to remember that nothing much was gained HP-wise. I'll see if I can find the post....

Hmmm......couldn't find it exactly, but lots of similar ones. Basically, GM has already wrung most of what can be taken from the stock 2.4l ecotec motor. The main benefit of the tune to the stock motor is better responsiveness. :D
 

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Just by driving the 2.4 you can tell that's not at it's full potential. accelleration could easily be improved with some ignition timing advancement which is what a tune does. I'm going to get one for the 2.4 eventually. You could also get more out of it with a more free flowing exhaust and the 2 togather would net nice results.
 

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I am certainly no expert, but over the years every post I have read about tuning the 2.4 says the gains to be realized are very small.
 

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I am certainly no expert, but over the years every post I have read about tuning the 2.4 says the gains to be realized are very small.
So small that I never bothered tuning my NA..:(:cryin::yawn:
 

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Haven't obtained objective numbers but performance & mileage both noticeably improved after tuning my '06 2.4 about 5 years ago. Enough that I felt I hadn't wasted the money.

Going to re-tune this weekend having just (finally) put in a K&N intake.
 

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Haven't obtained objective numbers but performance & mileage both noticeably improved after tuning my '06 2.4 about 5 years ago. Enough that I felt I hadn't wasted the money.

Going to re-tune this weekend having just (finally) put in a K&N intake.
That's good to hear. I am waiting on my trifecta tune after installing headers and HFC.
 

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I have the gmroadster tune with CAI, magnaflow, and deleted the cat, and it feels soooo much better. Not turbo fast but fast enough for a N/A 4 banger.
 

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Haven't obtained objective numbers but performance & mileage both noticeably improved after tuning my '06 2.4 about 5 years ago. Enough that I felt I hadn't wasted the money.

Going to re-tune this weekend having just (finally) put in a K&N intake.
tell us more about the gas mileage aspects. What can to seen in this regard ?

interestingly, my automatic n/a coupe is getting about 21mpg.
My n/a stick vert with was always 25.
my gxp stick vert is around 28.

( none of the cars were/are tuned. )
 

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tell us more about the gas mileage aspects. What can to seen in this regard ?

interestingly, my automatic n/a coupe is getting about 21mpg.
My n/a stick vert with was always 25.
my gxp stick vert is around 28.

( none of the cars were/are tuned. )
That makes sense, especially if you're talking mainly highway driving.

The GXP has a smaller engine and is more efficient when the turbo isn't engaged.

The stick has less driveline loss than the auto...
 

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Hi there - I had read (somewhere on this forum) that the 2.4 tune (non TC/SC) was more about removing the GM 'nanny' settings and that the throttle response was improved - I seem to remember that nothing much was gained HP-wise. I'll see if I can find the post....
After I did some mods to my car cai/exhaust/headers/ I had a tune done and the only real difference was that the car felt crisper if that makes any sense .As a couple of other people posted when you add a turbo (in my case a Hann) or a supercharger they have to reprogram your ECM needless to say a night and day difference in a base car .
 
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