...

Go Back   Lateral-g Forums > Technical Discussions > Engine
User Name
Password



Reply
 
Thread Tools Display Modes
  #1  
Old 05-26-2010, 09:35 AM
scherp69's Avatar
scherp69 scherp69 is offline
Lateral-g Supporting Member
 
Join Date: Dec 2007
Location: British Columbia, Canada
Posts: 882
Thanks: 0
Thanked 4 Times in 2 Posts
Default Variable Valve Timing - keep it or not???

I've searched this topic on the forums, internet and read in magazines, but still can't make up my mind. Everytime I think I have my mind made up about whether or not I should keep the VVT on my L92, I find something else that changes it. I was going to go VVT, then I found out that it would be quite a bit cheaper to get rid of the VVT, or so I thought. I went on to the Pace Performance site and found the performance package from Mast Motorsports has gone down in price to 2300 for computer, cam, springs, harness and a few other parts including dbw pedal. Frank had a good point with the fact that any local performance shop should be able to tune non-vvt, and harder to find someone to tune vvt. Then I read the latest Hot Rod article and it seems the VVT is pretty easy to tune with the Mast software ($399).

So I need your guys' input as to whether you think it's worth it to keep the VVT or just drop it and go to a regular LS3 cam setup. I don't completely understand the VVT set up, but keep reading it has so much potential. One thing I'm wondering is whether where I live would impact my decision. Where I am, it is mostly mountain therefore lots of hills. I used to have a Dodge Ram with the MDS but never noticed a difference since I'm in the mountains. Would this be the same with VVT? I know a lot of guys are dropping the VVT, but why if it's supposed to have so much more potential.

Here's what I've come up with so far:

Pros:
- better performance at higher rpms
- 5 - 10 % better fuel mileage
- potential is more than non VVT motor

Cons:
- Not very well known set up. Mast Motorsports is the only place that sells a plug n play set up, although it is supposed to be very easy to install and tune
- May be harder to find someone to tune it. Any performance shop should be able to tune a non VVT computer.
- Cost is a bit more. A LS3 cam set up would be around 1k for the computer and about 1k for the cam, springs, water pump, etc. The Mast set up is about 2300 for computer, cam, springs, harness and a few other parts. Another 300 to get some spacers to run a LS3 serpentine set up.

If anyone has any suggestions/advice, etc. on this topic, please feel free to jump in. Any advice is greatly appreciated. I'm sure I'm not the only that is trying to make this decision and hopefully this thread will help others as well. Thanks in advance.
__________________
Mike

Pro Touring 68 Acadian(Nova)
Speedtech subframe with high clearance control arms
Prodigy Bar rear suspension
Ridetech single adjustable coilovers
Wilwood 12.2" brakes
New Gen Splitters
LS3 and TKO600

Link to my build: https://lateral-g.net/forums/showthread.php4?t=14349


Last edited by scherp69; 05-26-2010 at 09:38 AM.
Reply With Quote
  #2  
Old 05-27-2010, 01:07 PM
Pantera EFI Pantera EFI is offline
Senior Member
 
Join Date: Feb 2008
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Default Pantera EFI + VVT OK

Hi, we ALSO support VVT with my EMS.

You may need a VVT limiter, YES very important.

I use a Crower camshaft (232/252 .561" 118C/L)

I use MY "phaser" limiter with "stops" for both Advance/Retard.

Lance
Reply With Quote
  #3  
Old 05-27-2010, 03:58 PM
scherp69's Avatar
scherp69 scherp69 is offline
Lateral-g Supporting Member
 
Join Date: Dec 2007
Location: British Columbia, Canada
Posts: 882
Thanks: 0
Thanked 4 Times in 2 Posts
Default

Quote:
Originally Posted by Pantera EFI View Post
Hi, we ALSO support VVT with my EMS.

You may need a VVT limiter, YES very important.

I use a Crower camshaft (232/252 .561" 118C/L)

I use MY "phaser" limiter with "stops" for both Advance/Retard.

Lance
Thanks for the reply Lance. Do you have any details about your set up...cost, hp rating with that cam, etc. Whatever you can tell me would be greatly appreciated. I will be running a stock L92 with a FAST 102 intake with 102 throttle body. I would like to be around 540 - 560 hp. Thanks.
__________________
Mike

Pro Touring 68 Acadian(Nova)
Speedtech subframe with high clearance control arms
Prodigy Bar rear suspension
Ridetech single adjustable coilovers
Wilwood 12.2" brakes
New Gen Splitters
LS3 and TKO600

Link to my build: https://lateral-g.net/forums/showthread.php4?t=14349

Reply With Quote
  #4  
Old 05-27-2010, 05:55 PM
6spdcamaro 6spdcamaro is offline
Senior Member
 
Join Date: Oct 2009
Posts: 242
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I remember reading that the reason GM only uses VVT in camaro's with automatics, was they were having some sort of issue with the manual. I think that your using a TKO so if you could find out what the issue was, it may be a deciding factor. A quick google search shows no answers.....
__________________
Ken
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 05:01 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Lateral-g.net