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Old 03-12-2013, 01:18 AM   #1
Bmatth1162
 
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Is it important to tell a tuner I have a ported TB?

I'm sick of the poor throttle response (mainly during heel/toe on the track) in the LS3 and am aware that a ported throttle body will help, which I plan to do first. If so, would it be necessary to tell my tuner (for a CAI/tune) that I have a ported TB? Does it affect how they would tune at all? Just curious, thanks
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Old 03-12-2013, 01:27 AM   #2
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You should always tell your tuner all of the mods you have so he can tune your car correctly.
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Old 03-12-2013, 01:50 AM   #3
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yes tell him, a port TB let's more un-metered air into the engine
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Old 03-12-2013, 01:55 AM   #4
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Going to a tuner is just like going to a doctor, tell him all the meds you're taking and any symptoms you are having!
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Old 03-12-2013, 05:19 AM   #5
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The more info he has to work with the better he can do his job.
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Old 03-12-2013, 05:36 AM   #6
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the throttle body itself does not have to be tuned, but it cant hurt to tell him about it. he is not going to charge more for it. and may be able to get you even more throttle response out of it with a tune.
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Old 03-12-2013, 08:50 AM   #7
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Quote:
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yes tell him, a port TB let's more un-metered air into the engine
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Old 03-12-2013, 09:06 AM   #8
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Quote:
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yes tell him, a port TB let's more un-metered air into the engine

All air the TB lets in is metered by the MAF, but he can optimize the better flow in the tune.

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Old 03-12-2013, 09:08 AM   #9
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Short answer, yes. Also, a tune will help the response. Tell the tuner that better throttle response is one of the things your looking for. My father's Trailblazer SS was really bad. Compared to it the Camaro throttle delay is almost unnoticable. He got a SLP tune done and it vertually eleminated the delay.
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Old 03-12-2013, 09:10 AM   #10
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Better yet................Why would you not?!?
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Old 03-12-2013, 09:35 AM   #11
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If you're sick of the throttle response you need to be looking at gears.
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Old 03-12-2013, 09:37 AM   #12
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You should always tell your tuner all of the mods you have so he can tune your car correctly.
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Old 03-12-2013, 11:23 AM   #13
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All air the TB lets in is metered by the MAF, but he can optimize the better flow in the tune.

the MAF adjusts for this? if this is true why would you need a tune if your adding a s/c with very low boost, air is air isn't it? i'm not tryin to be a dick at all. Honestly i'd wait to get a tune until you get more mods
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Old 03-12-2013, 12:10 PM   #14
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Not a dumb question at all, your on the right track, just terminology is off a bit.

All air entering the intake manifold is measured by the MAF (it is upstream of the throttle body) and this tells the PCM how to calculate cylinder fill rates, etc. Then the MAP also provides data and lastly the upstream O2's.

If unmetered air enters from a unvalved breather, then the PCM is going crazy and fuel trims will be all over the place as it trys to adapt and cant. But as long as the system is closed, then all air entering is metered by the the MAF. What the tuner needs to look at is the air tables to see if the increased flow of a ported TB needs to be adjust to in the coresponding tables.

So yes, a good tuner needs to know ALL the mods you have done (not appearance, just performance) to do the best job.

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Old 03-12-2013, 02:05 PM   #15
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Thanks guys. I was more wondering how a ported TB could affect a tune (which was answered) more so than just wondering if I need to tell the tuner about it. I didn't phrase it correctly, but thanks so much for the help!
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Old 03-12-2013, 02:52 PM   #16
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Where are you getting it tuned RPM maybe?
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Old 03-13-2013, 01:36 PM   #17
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Im told a good tuner will tell YOU what's in your car......

Always good to reveal and help but in all honesty, it's not going to matter once he or she does some data logging and hits a few pulls.

GL!
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Old 03-14-2013, 05:39 AM   #18
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Quote:
Originally Posted by Ivan @ Southwest Speed View Post
Im told a good tuner will tell YOU what's in your car......

Always good to reveal and help but in all honesty, it's not going to matter once he or she does some data logging and hits a few pulls.

GL!
Ivan

Correct.

My scanner is going to meter how much your LTFTs are off no matter if I know what your set up is or not. We do get alot of cars which owners bought and they have no idea what the build is. " its just a big cam".

I like to know everything about the history of the car before I plug into it, But honestly my scanner is going to tell me what to do anyway.
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