Vvt or not to vvt.. that is the question. - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Hcd3ss · 07-04-2021, 03:12 PM

Keep VVT or swap to 3 bolt setup? I really like the idea of keeping vvt, and programming for it to function in my favor, not favoring the epa (like the factory tune indicates). It also seems that a few years ago companies like gpi (for one) favored keeping VVT cam setups, and adjusting tuning accordingly. It seems to me that the tides have turned and those who are “in the know” are favoring 3-bolt stuff (which doesn’t have VVT).. I always assumed that the VVT would become generally adopted at some point.. and the results would end up adding power up too and down low, because the theory makes perfect sense.. soooo what are y’all’s thoughts on this? Wouldn’t it be reasonable to assume that vvt could only help if controlled accordingly? And shouldn’t an engine with a functional and we’ll tuned vvt system be able to out-perform an engine with no valve timing adjustment?

Hcd3ss · 07-04-2021, 03:14 PM

Btw, Car is mostly stock L99 with agp TT kit around 8-10 lbs. DOD fully deleted, using L9H VvT cam currently. But this threads intent is to gain yalls perspective.. so let me know your thoughts on this.. even if you don’t have a specific recommendation in my case.. thanks for years of support and information! I Love this forum

bayarea408 · 07-05-2021, 03:09 AM

Twins? Get rid of the VVT imo

Bildo · 07-05-2021, 02:48 PM

Scrap VVT, its garbage

gunchamp · 07-09-2021, 06:50 AM

Another vote for bailing the VVT

Bigdumogre · 07-09-2021, 07:07 AM

3 bolt seems to be superior and most shops don’t even do vvt anymore. There are still some die hard vvt people out there and it works for them, but you have twins already so go 3 bolt.

JLGO · 07-10-2021, 06:40 PM

Some people will tell you to to dump it, lol. Keep it, just have a tuner that knows how to tune it.

Hulk · 07-11-2021, 08:18 AM

The variable cam timing can be a big advantage if tuned properly. Contact a tuner that knows what they are doing with them and you cant beat um. I used Gwenty performance. Phone calls are freeeee.

bayarea408 · 07-11-2021, 06:59 PM

ok, so it looks like everyone is giving a direct opinion but not explaining WHY.

VVT IMO is a great cam selection if you are a street and strip car that sees alot of stop and go traffic. It has a wider powerband and you will make power and torque earlier. This is great because you arent constantly racing a car like this its a street warrior.

3 Bolt has advantages of making more utmost power at the top of the powerband, like when racing. You will have more cam selections with 3 bolt and there are alot more tuners comfortable and knowledgeable to tune it properly.

In a setup with twins, i assume you spec the turbo size appropriately you should make TONS of power early and imo i would go 3 bolt for cam selection and better top end power with a 3 bolt, but this is because you are twin turbo. If this was just a bolton n/a allmotor setup a VVT will feel faster and i think SBE VVT is at the top in terms of quickest cars. When we start talking boost i think most people 3bolt conversion for simplicity and more top end power.

Greenhornet2 · 07-12-2021, 08:04 AM

TT you don't really need the added benefit of the VVT in my opinion. if you were NA it makes a bigger difference. While it will still be better performance wise you just don't need it. Many shops get rid of it as it is harder to tune, more things to go wrong. The more moving parts in the equation the more weak points. AFM definitely get rid of though failures all day long with that. I am fairly certain you can dump the AFM and keep the VVT if you like though. Not 100% sure as I never had either being an LS3.

bayarea408 · 07-12-2021, 01:22 PM

Quote:

Originally Posted by Greenhornet2

TT you don't really need the added benefit of the VVT in my opinion. if you were NA it makes a bigger difference. While it will still be better performance wise you just don't need it. Many shops get rid of it as it is harder to tune, more things to go wrong. The more moving parts in the equation the more weak points. AFM definitely get rid of though failures all day long with that. I am fairly certain you can dump the AFM and keep the VVT if you like though. Not 100% sure as I never had either being an LS3.

you can dump the DOD with a delete kit, but you will also need to swap out to a different VVT cam that is not also a DOD cam, if you choose to go this route. GPI sells a nice DOD delete kit and their listing clearly discloses that you will need to select a NON DOD cam to swap in.

Hcd3ss · 07-19-2021, 10:31 PM

I already got rid of the arm. Cam that is currently in the car is a oem L9h cam. Vvt, no AFM.

morepowerjoe · 07-20-2021, 12:08 AM

Quote:

Originally Posted by Hcd3ss

I already got rid of the arm. Cam that is currently in the car is a oem L9h cam. Vvt, no AFM.

What the heck are you talking about. You got rid of a arm? And what is a L9h cam? 🤔

hunter1660 · 07-20-2021, 06:25 AM

He has a stutter….he says….he got rid of the afm and has a ls9 cam

07-04-2021, 03:12 PM	#1
Hcd3ss Drives: 2011 camaro 2ss/RS Join Date: Nov 2013 Location: Waycross, Ga Posts: 80	Vvt or not to vvt.. that is the question. Keep VVT or swap to 3 bolt setup? I really like the idea of keeping vvt, and programming for it to function in my favor, not favoring the epa (like the factory tune indicates). It also seems that a few years ago companies like gpi (for one) favored keeping VVT cam setups, and adjusting tuning accordingly. It seems to me that the tides have turned and those who are “in the know” are favoring 3-bolt stuff (which doesn’t have VVT).. I always assumed that the VVT would become generally adopted at some point.. and the results would end up adding power up too and down low, because the theory makes perfect sense.. soooo what are y’all’s thoughts on this? Wouldn’t it be reasonable to assume that vvt could only help if controlled accordingly? And shouldn’t an engine with a functional and we’ll tuned vvt system be able to out-perform an engine with no valve timing adjustment?

07-05-2021, 02:48 PM	#4
Bildo Drives: 2012 2SS/RS LS3 Join Date: Dec 2011 Location: Omaha, Nebraska Posts: 1,677	Scrap VVT, its garbage __________________ 2012 2SS M6, ERL Superdeck 6 427, PRC 255 Heads, Procharger F1A w/ 3.85 pulley, 1300hp intercooler, Squash Dual 450lph, E85, ID1700, RXT Clutch, DSS 1pc driveshaft, GForce axles, Eaton Detroit Trutrac, a bunch of other crap I don't feel like typing.

07-09-2021, 06:50 AM	#5
gunchamp Drives: 15 Camaro SS Join Date: Oct 2018 Location: Mountains of central PA Posts: 1,442	Another vote for bailing the VVT __________________ 15 Camaro SS- GPI max top end, ESS Vortech V3 9psi, ID 1050s, ZL1 pump, JMS bap, Long tubes, Corsa extreme, Circle D pro 5C, 391 rear, DSS carbon drive shaft, poly cradle bushings, tuned by Ted Jannetty and much much more

07-09-2021, 07:07 AM	#6
Bigdumogre Drives: 2012 Camaro SS Join Date: Dec 2019 Location: New York Posts: 1,434	3 bolt seems to be superior and most shops don’t even do vvt anymore. There are still some die hard vvt people out there and it works for them, but you have twins already so go 3 bolt. __________________ 2012 Camaro 2SS/RS - CSP Custom Cam 232/240 .615/.615 113 +3, Texas speed CNC heads, FTI billet triple disc converter, K&N cai, Katech ported TB, GPI Ported/rod modded manifold, Texas speed 1 7/8 headers, HFC, Flowmaster 2 chambers with x pipe, Mishimoto CC, MSD wires, Roto fab washer relocation, tru cool 40k trans cooler, apex scoop, Pedders extreme coil overs and much more!!

07-10-2021, 06:40 PM	#7
JLGO Drives: 2015 Camaro SS convertible L99 Join Date: Nov 2016 Location: Orlando, FL Posts: 245	Some people will tell you to to dump it, lol. Keep it, just have a tuner that knows how to tune it. __________________ Corsa CAI w/Donalson Power Filter, BBK 1 7/8 headers, MF resonator, custom exhaust with Legato mufflers, mildly ported heads, TSP VVT 3.2 cam (whole package), 3.91 1LE gears, Circle D 3200 stall torque converter, B&M power cooler tranny cooler. Tuned by Casey TSP's tuner. 1/4 12.16 117mph with stock tires at 20 psi.

07-04-2021, 03:14 PM	#2
Hcd3ss Drives: 2011 camaro 2ss/RS Join Date: Nov 2013 Location: Waycross, Ga Posts: 80	Btw, Car is mostly stock L99 with agp TT kit around 8-10 lbs. DOD fully deleted, using L9H VvT cam currently. But this threads intent is to gain yalls perspective.. so let me know your thoughts on this.. even if you don’t have a specific recommendation in my case.. thanks for years of support and information! I Love this forum

07-05-2021, 03:09 AM	#3
bayarea408 Drives: T Join Date: Mar 2015 Location: CA Posts: 803	Twins? Get rid of the VVT imo

07-11-2021, 08:18 AM	#8
Hulk Drives: 2011 Synenergy Green 2SS/RS Join Date: Jan 2011 Location: Pueblo, Co Posts: 557	The variable cam timing can be a big advantage if tuned properly. Contact a tuner that knows what they are doing with them and you cant beat um. I used Gwenty performance. Phone calls are freeeee. __________________ 2011 Synenergy Green 2SS/RS Automatic.

07-11-2021, 06:59 PM	#9
bayarea408 Drives: T Join Date: Mar 2015 Location: CA Posts: 803	ok, so it looks like everyone is giving a direct opinion but not explaining WHY. VVT IMO is a great cam selection if you are a street and strip car that sees alot of stop and go traffic. It has a wider powerband and you will make power and torque earlier. This is great because you arent constantly racing a car like this its a street warrior. 3 Bolt has advantages of making more utmost power at the top of the powerband, like when racing. You will have more cam selections with 3 bolt and there are alot more tuners comfortable and knowledgeable to tune it properly. In a setup with twins, i assume you spec the turbo size appropriately you should make TONS of power early and imo i would go 3 bolt for cam selection and better top end power with a 3 bolt, but this is because you are twin turbo. If this was just a bolton n/a allmotor setup a VVT will feel faster and i think SBE VVT is at the top in terms of quickest cars. When we start talking boost i think most people 3bolt conversion for simplicity and more top end power.

07-12-2021, 08:04 AM	#10
Greenhornet2 Drives: 2011 Camaro 2SS LS3 Whipple Join Date: May 2019 Location: Connecticut Posts: 1,925	TT you don't really need the added benefit of the VVT in my opinion. if you were NA it makes a bigger difference. While it will still be better performance wise you just don't need it. Many shops get rid of it as it is harder to tune, more things to go wrong. The more moving parts in the equation the more weak points. AFM definitely get rid of though failures all day long with that. I am fairly certain you can dump the AFM and keep the VVT if you like though. Not 100% sure as I never had either being an LS3. __________________ Whipple 2.9 CAI ID1050x injectors ZL1 Pump JRE FPCM JMS Voltage booster JRE Rough Idle blower cam BTR .660 springs CHE trunnion kit 1 7/8 Speed Engineering Borla Atak JRE scoop 1.5" lowering springs BMR trailing arms and toe links Cradle inserts 704WHP 603WTQ 93 octane

07-19-2021, 10:31 PM	#12
Hcd3ss Drives: 2011 camaro 2ss/RS Join Date: Nov 2013 Location: Waycross, Ga Posts: 80	I already got rid of the arm. Cam that is currently in the car is a oem L9h cam. Vvt, no AFM.

07-20-2021, 06:25 AM	#14
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	He has a stutter….he says….he got rid of the afm and has a ls9 cam __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners