VMAX 87mm LSA Throttle Body and CAI - Long Term Problems? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

BigBoyBlue · 06-06-2014, 12:57 PM

I'm seeing a lot of little issues that people are experiencing with the new throttle bodies. Mostly it seems like the car just needs to get used to the new air flow and then it seems to get better. Is this correct?

Has anyone had continual problems such that they had to go back to stock?

Has the drivability suffered at all, namely rough idle, lost throttle smoothness, and CELs?

I've been kicking around whether or not to install my RotoFab and VMAX. I just don't want to ruin the perfect balance of my car.

Baer383 · 06-06-2014, 01:54 PM

If it is tuned properly you should not have a problem,
I haven't had any issue with mine idles and drives great.

BigBoyBlue · 06-06-2014, 02:16 PM

Quote:

Originally Posted by Baer383

If it is tuned properly you should not have a problem,
I haven't had any issue with mine idles and drives great.

I thought there needn't be a tune with just the RotoFab and VMAX installed. Is that correct? Are you saying that a tune would make it better than without one? I worry about the warranty.

Thanks.

Baer383 · 06-06-2014, 02:21 PM

Quote:

Originally Posted by BigBoyBlue

I thought there needn't be a tune with just the RotoFab and VMAX installed. Is that correct? Are you saying that a tune would make it better than without one? I worry about the warranty.

Thanks.

Some people may have a issue some won't I put mine on when I built my engine and had it tuned so I'm basing my comment on my experience that why I said it runs fine.

cam99 · 06-06-2014, 02:42 PM

Those were the first two mods I had and I had no issues with them. Have had them over a year now and still no issue

jayno20 · 06-06-2014, 02:50 PM

These were the first 2 mods I wanted to do as well. I didn't want to get a tune though. Are people having problems with these mods without a tune?

Drbormd · 06-06-2014, 02:55 PM

Mine had strange idle. Now that I have it tuned runs perfect.

RLHMARINES · 06-06-2014, 03:38 PM

I've had mine installed for awhile now with no issue at all. No tune.

Chad's ZL1 · 06-06-2014, 04:59 PM

If you have a cold air intake as well be carefull getting on it too much. I have that same throttle body with rotofab intake and My car has been shutting down and says reduced engine power/stabili track or something a long that line. Took it to dealer and they said it's because the engine is getting too much air and the computer thinks something is wrong and tries to protect it by shutting down. Soooooo I can basically get a tune and up the mass air flow sensor setting so this hopefully fixes it, but getting a tune may void the warranty...I only have 8000 miles on the car, or I can take off the throttle body and put the factory one back on and just leave the cold air intake on to see if this fixes it.....which is what I will prob. do.

Dr.Spike · 06-06-2014, 05:30 PM

I have had zero issues with my CAI, Inc. CAI and VMAX LSA Ported TB combination. I do not have a tune.

It idles no different than it did stock and I have had no problems when 'getting on it'.

AquaSSRS · 06-06-2014, 05:30 PM

I've had zero issues with my vmax and roto-fab before I got it tuned and no issues since getting it tuned from JRE. It seems to be a hit or miss issue with some people going into limp mode.

ZO6 Bryan · 06-06-2014, 05:55 PM

It's not the MAF table that needs fixing. It's the Max Airflow vs. Throttle Position Delta table. This is the table that tells the PCM how much airflow to expect for a given throttle position. An aftermarket TB will screw with it. The Rotofab isn't the problem.

Baer383 · 06-06-2014, 06:04 PM

Quote:

Originally Posted by ZO6 Bryan

It's not the MAF table that needs fixing. It's the Max Airflow vs. Throttle Position Delta table. This is the table that tells the PCM how much airflow to expect for a given throttle position. An aftermarket TB will screw with it. The Rotofab isn't the problem.

Those tables are what I had my tuner go back thru it today to get my idle to be even smoother.

cdjnight · 06-06-2014, 06:26 PM

i have Vmax and K&N cold air kit, ran like a champ since i put it on. I also was very carful the mass air meter is facing correct direction and I checked for vacuum leaks on every connection. Did an APEX catch can at same time, which has worked flawlessly too! I wouldnt hesitate to buy all the same and put it on a $100,000 car.

06-06-2014, 12:57 PM	#1
BigBoyBlue Go NY Giants & NY Rangers Drives: 2013 ZL1 M6 Join Date: Nov 2013 Location: Maryland Posts: 782	VMAX 87mm LSA Throttle Body and CAI - Long Term Problems? I'm seeing a lot of little issues that people are experiencing with the new throttle bodies. Mostly it seems like the car just needs to get used to the new air flow and then it seems to get better. Is this correct? Has anyone had continual problems such that they had to go back to stock? Has the drivability suffered at all, namely rough idle, lost throttle smoothness, and CELs? I've been kicking around whether or not to install my RotoFab and VMAX. I just don't want to ruin the perfect balance of my car. __________________ Molon Labe!

06-06-2014, 01:54 PM	#2
Baer383 Drives: 2013 ZL1 Ashen Gray Join Date: Oct 2013 Location: Lawrenceville,Ga Posts: 668	If it is tuned properly you should not have a problem, I haven't had any issue with mine idles and drives great. __________________ I don't have to know everything,I just need to know,what I need to know,when I need to know it! MODS, a lot of money,a lot of parts,a lot of time,a lot of patience. 754 RWHP 747 RWTQ 93 Octane http://www.camaro5.com/forums/showthread.php?t=347243

06-06-2014, 02:42 PM	#5
cam99 Drives: 2012 ZL1 Join Date: Dec 2011 Location: pittsburgh area Posts: 1,426	Those were the first two mods I had and I had no issues with them. Have had them over a year now and still no issue __________________ 2012 CTF ZL1-stock 2012 ZL1 (sold) JRE 75rwhp kit catless ported lsa TB 11.04 @ 128.35 on hoosier drs and skinnies @ PRP with 1100DA

06-06-2014, 03:38 PM	#8
RLHMARINES 1st Civ. Div. Drives: Camaroless for now...RIP "Big SexZ" Join Date: Dec 2007 Location: Savannah, Ga Posts: 2,726	I've had mine installed for awhile now with no issue at all. No tune. __________________ Swift....Silent....Deadly

06-06-2014, 05:30 PM	#11
AquaSSRS Drives: formerly a AGM ZL1 (sold) Join Date: Jan 2010 Location: Allentown, PA Posts: 435	I've had zero issues with my vmax and roto-fab before I got it tuned and no issues since getting it tuned from JRE. It seems to be a hit or miss issue with some people going into limp mode. __________________ 2013 Ashen gray ZL1 M6 with Roto-fab, Vmax TB, Pfadt headers, 10% pulley, JRE tuned. 11.459 @125mph. 566hp/517tq. Sold due to not enough seat belts. FML.

06-06-2014, 02:50 PM	#6
jayno20 Go fast, please. Drives: 2019 Corvette ZR1 Join Date: May 2014 Location: Pittsburgh, PA Posts: 2,471 View My Garage	These were the first 2 mods I wanted to do as well. I didn't want to get a tune though. Are people having problems with these mods without a tune?

06-06-2014, 02:55 PM	#7
Drbormd Drives: 13 F150 Eco 14 ZL1 650 RWHP Join Date: Sep 2013 Location: Lincoln California Posts: 132	Mine had strange idle. Now that I have it tuned runs perfect.

06-06-2014, 04:59 PM	#9
Chad's ZL1 THERAPY Drives: Red Rock Metallic ZL1 Join Date: Nov 2009 Location: Roseville Posts: 1,440 View My Garage	If you have a cold air intake as well be carefull getting on it too much. I have that same throttle body with rotofab intake and My car has been shutting down and says reduced engine power/stabili track or something a long that line. Took it to dealer and they said it's because the engine is getting too much air and the computer thinks something is wrong and tries to protect it by shutting down. Soooooo I can basically get a tune and up the mass air flow sensor setting so this hopefully fixes it, but getting a tune may void the warranty...I only have 8000 miles on the car, or I can take off the throttle body and put the factory one back on and just leave the cold air intake on to see if this fixes it.....which is what I will prob. do.

06-06-2014, 05:30 PM	#10
Dr.Spike Drives: 2013 Camaro ZL1 (IOM) Join Date: Oct 2012 Location: Sun Prairie, WI Posts: 100 View My Garage	I have had zero issues with my CAI, Inc. CAI and VMAX LSA Ported TB combination. I do not have a tune. It idles no different than it did stock and I have had no problems when 'getting on it'.

06-06-2014, 05:55 PM	#12
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	It's not the MAF table that needs fixing. It's the Max Airflow vs. Throttle Position Delta table. This is the table that tells the PCM how much airflow to expect for a given throttle position. An aftermarket TB will screw with it. The Rotofab isn't the problem. __________________ Bryan 2018 ZL1 M6

06-06-2014, 06:26 PM	#14
cdjnight Drives: 2013 ZL1 A6 Join Date: Nov 2013 Location: Council Bluffs, Iowa Posts: 266	i have Vmax and K&N cold air kit, ran like a champ since i put it on. I also was very carful the mass air meter is facing correct direction and I checked for vacuum leaks on every connection. Did an APEX catch can at same time, which has worked flawlessly too! I wouldnt hesitate to buy all the same and put it on a $100,000 car. __________________