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Old 04-02-2012, 09:54 AM   #1
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Power increase after tune with cam?

Hey guys just wondering if you guys had a baseline number after your cam install and how much was the gain after the tune. Should I expect to pick up power across the bored? I never had the car even tuned for the headers so I am thinking there is allot to gain at this point. Not shure what to expect.
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Old 04-02-2012, 01:14 PM   #2
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I think you'll gain quite a bit. My cam in my car is big enough that I really couldn't even put the throttle down with the old tune in there, so I don't know what to tell you, but I'm sure your going to see your AFR and spark are off from optimal until the car is tuned.
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Old 04-02-2012, 01:59 PM   #3
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With my build I went from 370 RWHP to 439 (On 90 oct).
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Old 04-02-2012, 02:06 PM   #4
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You should see around 80rwhp if you have headers also
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Old 04-02-2012, 02:08 PM   #5
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It depends on the cam you chose and how good your tuner is. Ballpark 35 to 80 rwhp so as you can see it is a big spread as well as it will vary as to what other existing mods are done.
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Old 04-02-2012, 02:22 PM   #6
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Quote:
Originally Posted by Bad70supreme View Post
Hey guys just wondering if you guys had a baseline number after your cam install and how much was the gain after the tune. Should I expect to pick up power across the bored? I never had the car even tuned for the headers so I am thinking there is allot to gain at this point. Not shure what to expect.
I think my experience is fairly typical for a mid range cam (many call it a stage II cam). With full bolt ons and cam ( see my sig for details) I gained 83 RWHP. That gain is for a stock baseline dyno to a full tuned result (same shop, same dyno and within a couple of days of each other for the runs - no big weather changes in between).
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Old 04-02-2012, 03:08 PM   #7
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pretty sure people are not really understanding what the OP wants. he is looking for gains from a TUNE. this can be a hard question to answer because most of our cams cannot run on stock tune. he already has a cam in with headers. but wondering how much the tune will add.
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Old 04-02-2012, 03:14 PM   #8
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pretty sure people are not really understanding what the OP wants. he is looking for gains from a TUNE. this can be a hard question to answer because most of our cams cannot run on stock tune. he already has a cam in with headers. but wondering how much the tune will add.
Yep... I was wondering if you were shown somewhat of a base line before they completed the tune! For example your car was making around 430 and after the tune was complete they picked up X amount.

On the subject what were the gains from the tunes with your boltons? Was the tune a bigger impact then the headers?
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Old 04-02-2012, 04:35 PM   #9
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I think my experience is fairly typical for a mid range cam (many call it a stage II cam). With full bolt ons and cam ( see my sig for details) I gained 83 RWHP. That gain is for a stock baseline dyno to a full tuned result (same shop, same dyno and within a couple of days of each other for the runs - no big weather changes in between).
If your car was already tuned to the max for your other mods on a stock cam, and then re-tuned for a cam, it probably wouldn't have gained 83 RWHP...you'd make the same number when all done, but you'd have made more prior to the cam.

But as was mentioned, the OP is asking that since he is able to drive his car with the stock tune and the cam he chose, and it actually has worked out well for him...how much will he gain with a tune. There is absolutely no way he'll gain ANOTHER 80+ horsepower from tuning it...probably 20-30, but maybe a little less since the cam is fairly mild and the stock tune reacted well to it already.
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Old 04-02-2012, 04:53 PM   #10
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It is running VERY rich, it actually burns my eyes sometimes Since I never had a tune for the headers, I am hopping to have a different car once this done.
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Old 04-02-2012, 06:51 PM   #11
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It all depends on how well your car is running with the stock tune.

More aggressive cams will need more tuning and your gains will be greater with tuning. Less aggresssive cams (closer to stock specs) will need less tuning and your gains will be smaller with tuning.
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Old 04-02-2012, 07:32 PM   #12
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Whatever way you look at it YOU need a tune! I would rather have the timing and afr right then both all over the place and risk damaging my engine. Like washing down the cylinders being that rich! You'll really be crying when it shows some rods some sunlight lol. Do mods the right way with a tune and not listen to people on here by saying you dont really need a tune for some crazy reason. Ps and take it to a reputable shop also.
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Old 04-02-2012, 07:48 PM   #13
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you probably have less horsepower than stock with headers and cam with stock tune.
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Old 04-02-2012, 08:23 PM   #14
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you probably have less horsepower than stock with headers and cam with stock tune.
The car IS getting tuned in 2 days! I guarantee it's making allot more then stock right now, definitely not running to potential but it's way faster. I haven't been beating on it much and lately I have been babying it so it's all good, just a few days to go!
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Old 04-02-2012, 09:40 PM   #15
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you probably have less horsepower than stock with headers and cam with stock tune.
Omg wow! Lol really?
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Old 04-02-2012, 09:42 PM   #16
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The car IS getting tuned in 2 days! I guarantee it's making allot more then stock right now, definitely not running to potential but it's way faster. I haven't been beating on it much and lately I have been babying it so it's all good, just a few days to go!
Cool make sure you change that oil, no telling if fuel got to it bud.
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Old 04-03-2012, 12:11 AM   #17
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Id say 20-30hp.

I never got a baseline this time around. But when the car was bolt on it went from 409 rwhp untuned with full bolt ons to 430rwhp after tuning. I would think you would pick up at least that much plus another 10 or so being it is cammed with a smallish cam.

I would guess ~420rwhp right now and ~450rwhp after tune. But guessing dyno numbers is almost impossible...they all read differently.

The car will feel like a whole new animal though...the increase in throttle response/overall responsiveness etc will be huge.
Also, these cars have a lot of torque management and I even think some power is pulled on WOT shifts when stock. Your tuner will remove all of that (well most do...make sure they do). That will make a good bit of difference as well.

Dont worry...you will be impressed. Definitely worth the money for a proper tune.
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Old 04-03-2012, 08:40 AM   #18
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Id say 20-30hp.

I never got a baseline this time around. But when the car was bolt on it went from 409 rwhp untuned with full bolt ons to 430rwhp after tuning. I would think you would pick up at least that much plus another 10 or so being it is cammed with a smallish cam.

I would guess ~420rwhp right now and ~450rwhp after tune. But guessing dyno numbers is almost impossible...they all read differently.

The car will feel like a whole new animal though...the increase in throttle response/overall responsiveness etc will be huge.
Also, these cars have a lot of torque management and I even think some power is pulled on WOT shifts when stock. Your tuner will remove all of that (well most do...make sure they do). That will make a good bit of difference as well.

Dont worry...you will be impressed. Definitely worth the money for a proper tune.
Thanks man, I guess that is what I was looking to hear! Thats a big gain from your bolt-ons to tune, thats what I am hoping for is a solid gain across the bored. 1 more day
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Old 04-03-2012, 09:00 AM   #19
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If your car was already tuned to the max for your other mods on a stock cam, and then re-tuned for a cam, it probably wouldn't have gained 83 RWHP...you'd make the same number when all done, but you'd have made more prior to the cam.
Got it. And never meant to imply otherwise. Since I didn't personally install a cam then run it on a dyno untuned to get a number and then dyno it again tuned - I was just offering my perspective that when it is all said and done and he has a bolt-on and cammed and tuned car he can expect somewhere in the 80 - 100 RWHP gain range over a stock LS3 depending on how big of a cam he chose. From my perspective thats all that mattered because I can't see anyone running around with a cammed car on a stock tune for long anyway.
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Old 04-03-2012, 10:46 AM   #20
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It is running VERY rich, it actually burns my eyes sometimes Since I never had a tune for the headers, I am hopping to have a different car once this done.
Don't mistake the fumes from an injected car running without cats for running rich...I get very frustrated with people when I'm tuning their car, and they insist it's running too rich...when at full throttle any less fuel would be dangerously close to knock, and when at part throttle, the fuel trims are less than 2%, extremely stable, and timing is setup for the best efficiency and driveability...sometimes exhaust will just make your eyes burn, especially if the car is running in a small area.

I had one person piss me off so much with that, that I said "let me try one more thing", then I flashed the stock tune back into his car, handed him his money back, and said "since you know more than me, do it yourself"...he called me 2 days later and said "your tune ran so much better than the one I just had so and so do, will you re-tune it" and I said "nah".
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Old 04-03-2012, 11:01 AM   #21
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I have no intensions on telling my tunner how to do anything, thtas for shure. He does a tun of ls stuff so iam not worried, all I will be asking him is to keep my idle as lopy as possible. I know some people want the idle smoothen out.
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Old 04-03-2012, 11:54 AM   #22
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A good tune makes all the difference in the world.

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Old 04-03-2012, 12:10 PM   #23
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My builder got a baseline tune from my tuner, so i could drive the car to the dyno the next day to finish the tune. First pull was 449 and final pul was 470. so i gained 21 hp from a Finalized tune. For that install i had CAI, Headers full 3" exhaust and a cam. With no tune at all...i would expect a decent amount more.
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