Ported TB or CAI or Both?
Thread Starter
Melting Slicks
Joined: Mar 2001
Posts: 2,175
Likes: 56
From: Clarence N.Y.
Ported TB or CAI or Both?
Have a 08 LS3,only thing other than stock is a tune.
Looking for improvement in throttle response and maybe
adding some power. What would be advisable,a ported
throttle body or a CAI or both?
Thanks
Looking for improvement in throttle response and maybe
adding some power. What would be advisable,a ported
throttle body or a CAI or both?
Thanks
Race Director
Joined: May 2004
Posts: 16,667
Likes: 1,209
From: Raleigh, NC
St. Jude Donor '15
If you just want it more responsive, throw a Vitesse Throttle Controller on it and it will be as responsive as you want it to be
Ported TB's and CAI's are way over rated IMO and ported TB's in particular are prone to issues
Ported TB's and CAI's are way over rated IMO and ported TB's in particular are prone to issues
Last edited by schpenxel; Dec 21, 2015 at 09:43 PM.
Race Director
Joined: Aug 2005
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From: Hudson WI
NCM Sinkhole Donor
Race Director
Joined: Dec 2013
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Ditto, if you have the TM dialed out in the tune already.
If TM is still hobbling the motor, then start there.
Racer
Joined: Jan 2014
Posts: 400
Likes: 37
From: Lone Star State
What tune is on your car, canned or off a Dyno?
Also more hp gains come from headers than intakes.
Also more hp gains come from headers than intakes.
Last edited by Suds; Dec 22, 2015 at 09:59 PM.
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Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
A CAI like a Vararam will be a much greater advantage than a ported TB. The PTB is almost nothing on an A6, but will improve throttle response on a M6. A better economy choice for a power increase is to pickup either a Z06 exhaust manifold, cats, and H or X pipe, or a set of used headers.
Race Director
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From: Central MO
Melting Slicks
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From: Round Rock Texas
Le Mans Master
Joined: Oct 2000
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From: Sausalito CA
My vote: Add the controller.
Then I'd look at the CAI or filters or DIY air mods.
If those don't make you smile, then go with an intake manifold and TB and retune.
Plus don't forget the exhaust portion of the horsepower equation
Good luck.
Then I'd look at the CAI or filters or DIY air mods.
If those don't make you smile, then go with an intake manifold and TB and retune.
Plus don't forget the exhaust portion of the horsepower equation
Good luck.
Safety Car
Joined: Sep 2007
Posts: 4,009
Likes: 491
From: South Florida
Push down harder on the gas pedal for better throttle response. IF the car was tuned and still feels sluggish then somethings not right with the tune itself. Ported stock TB will likely just lead to issues with minimal, if any gains. Vararam will definitely help the car at higher speeds. I would never install a "throttle controller" in any car, theres no reason.
Race Director
Joined: Jul 2005
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From: Central MO
Push down harder on the gas pedal for better throttle response. IF the car was tuned and still feels sluggish then somethings not right with the tune itself. Ported stock TB will likely just lead to issues with minimal, if any gains. Vararam will definitely help the car at higher speeds. I would never install a "throttle controller" in any car, theres no reason.
Safety Car
Joined: Sep 2007
Posts: 4,009
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From: South Florida
You could be right. But when you have some of the best LS performance shops in the country tell you they have no use, can interfere with other electronics, and could potentially be a safety issue I take their advice. My buddy had one on his cammed and supercharged LS3 camaro, wasnt good. All it's doing is tricking you into thinking the car has better throttle response.
Race Director
Joined: Jul 2005
Posts: 12,045
Likes: 3,588
From: Central MO
You could be right. But when you have some of the best LS performance shops in the country tell you they have no use, can interfere with other electronics, and could potentially be a safety issue I take their advice. My buddy had one on his cammed and supercharged LS3 camaro, wasnt good. All it's doing is tricking you into thinking the car has better throttle response.
My Vitesse has been installed since shortly after they came out, with zero issues. Mine is set on SP4, which to me approximates a cable driven throttle. It absolutely takes away the drive by wire throttle lag, which is amplified by the throttle mapping on LS3 where 50% throttle application only yields about 25 or 30% actual throttle.
Race Director
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Who tuned the car, and do they have the talent to retune the throttle mapping as well?
Hence nothing physical needs to be changed, just The sedate way GM throttle mapped the tune to make is soccer mom safe to begin with.
As for the throttle controllers, they only change the percentage of how the pedal reads per percentage pushed only, not the response times of the the throttle body in reaction clocking, nor do they change the stall timing and reaction time of the TB that get worse on the none Z06/ZR1, the more nannies are turned off as well.
Hence nothing physical needs to be changed, just The sedate way GM throttle mapped the tune to make is soccer mom safe to begin with.
As for the throttle controllers, they only change the percentage of how the pedal reads per percentage pushed only, not the response times of the the throttle body in reaction clocking, nor do they change the stall timing and reaction time of the TB that get worse on the none Z06/ZR1, the more nannies are turned off as well.
Instructor
Joined: Jan 2022
Posts: 168
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From: Albuquerque, NM
i ported my tb because i was bored and got a msd atomic intake manifold. now i get a tiny whistle at part throttle from air going over the blade. so keep the little swirl ramp that is there.