Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
HRE Wheels
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Forced Induction - V8

Forced Induction - V8 V8 Supercharger, turbo, nitrous discussions

Reply
 
Thread Tools
Old 06-14-2013, 10:20 PM   #1
Ajmalian
 
Drives: 2010 Camaro 2SS/RS, '11 GMC Denali
Join Date: Jul 2010
Location: Dubai, United Arab Emirates
Posts: 208
Lag and loss of boost between shifts

Hey guys,

I'm kinda new to this so please try and bare with me. I have an SS with a 2.9L whipple s/c and a stage 2C cam from Livernois. My car is a 6 speed manual and the problem I seem to face is that I tend to lose quite a bit of boost if not all during my gear changes...and I mean during fast shifting during races or aggressive driving. There seems to be a significant lag of some sort in the supercharged boosted power return when shifted into the higher gear. Anybody else facing this problem? Any idea what it is and how this could be solved?

I look forward to your feedback. Any help would be appreciated.
Ajmalian is offline   Reply With Quote
Old 06-15-2013, 07:13 AM   #2
SUKXOST
Do you even lift, bro?
 
SUKXOST's Avatar
 
Drives: 2013 1LE Camaro
Join Date: Aug 2012
Location: Sumter, SC
Posts: 3,063
check with your tuner. See if the fuel is being commanded too late....my last tune did the same thing and a new tuner fixed it by having the fuel shifted to the left/earlier.
__________________
My 1LE (645WHP/597WTQ) build/journal Thread:
1st ever 1LE COTW http://www.camaro5.com/forums/showthread.php?t=255461
SUKXOST is offline   Reply With Quote
Old 06-17-2013, 11:26 AM   #3
Chris@Livernois

 
Chris@Livernois's Avatar
 
Drives: 2010 Camaro
Join Date: Jun 2009
Location: Dearborn Heights, MI
Posts: 830
Quote:
Originally Posted by Ajmalian View Post
Hey guys,

I'm kinda new to this so please try and bare with me. I have an SS with a 2.9L whipple s/c and a stage 2C cam from Livernois. My car is a 6 speed manual and the problem I seem to face is that I tend to lose quite a bit of boost if not all during my gear changes...and I mean during fast shifting during races or aggressive driving. There seems to be a significant lag of some sort in the supercharged boosted power return when shifted into the higher gear. Anybody else facing this problem? Any idea what it is and how this could be solved?

I look forward to your feedback. Any help would be appreciated.
Who tuned the car for you?
Chris@Livernois is offline   Reply With Quote
Old 06-18-2013, 04:51 PM   #4
Ajmalian
 
Drives: 2010 Camaro 2SS/RS, '11 GMC Denali
Join Date: Jul 2010
Location: Dubai, United Arab Emirates
Posts: 208
Quote:
Originally Posted by Chris@Livernois View Post
Who tuned the car for you?

My tuner...at a garage here in Dubai by the name of DynoKing. Why do you ask who tuned my car?
Ajmalian is offline   Reply With Quote
Old 06-18-2013, 05:56 PM   #5
Andy@Livernois

 
Andy@Livernois's Avatar
 
Drives: 1987 Buick Regal Turbo-T
Join Date: Sep 2009
Location: Grand Blanc, MI/Dearborn Heights, MI
Posts: 431
Quote:
Originally Posted by Ajmalian View Post
My tuner...at a garage here in Dubai by the name of DynoKing. Why do you ask who tuned my car?
I am sure chris was making certain the car indeed was dyno tuned, rather than using the standard whipple tune. Unfortunately, I do not think it is going to be something we can figure out without having the car here. It will need to be recreated on the dyno, or while datalogging it to sort that out, that will tell you if it is tune, or mechanically created.
Andy@Livernois is offline   Reply With Quote
Old 06-19-2013, 01:17 AM   #6
Ajmalian
 
Drives: 2010 Camaro 2SS/RS, '11 GMC Denali
Join Date: Jul 2010
Location: Dubai, United Arab Emirates
Posts: 208
Quote:
Originally Posted by Andy@Livernois View Post
I am sure chris was making certain the car indeed was dyno tuned, rather than using the standard whipple tune. Unfortunately, I do not think it is going to be something we can figure out without having the car here. It will need to be recreated on the dyno, or while datalogging it to sort that out, that will tell you if it is tune, or mechanically created.

Hey Andy,

I was told by my tuner that it was a common problem in Whipple sc and its apparently the bypass valve which causes this problem. He's worked on many Camaros with Whipples, mostly automatics (lucky bastards don't lose boost during gear changes!! ) and it's usually an odd one here and there in the manual ones where the car doesn't seem to have this lag or delay issue. Now the issue also is the fact that we are in UAE. If I were in the US, I would've personally driven down to you guys and let you have a look. Also, unfortunately I'm not very good with technical terms but what basically it feels like when shifting hard and fast, is that when you get back on the gas, the power comes back (NA kinda power) but there is literally almost a 1 second, if not more before you can feel the boost punch back in.

I'm not saying I'm the best shifter there is but I know I can shift well enough and what's upsetting is that I am rating at 608 RWHP and a mildly modified, automatic CTS-V coupe rating at 548 RWHP on the very same dyno handed my a$$ over to me just because I was losing boost during shifts... He would inch up or rather metre up every time I shifted..

So is there anything we can do at our end to diagnose the situation or perhaps send some kind of logs or observations across to you so as for you to possibly study and analyze what the problem is?
Ajmalian is offline   Reply With Quote
Old 06-19-2013, 11:18 AM   #7
Andy@Livernois

 
Andy@Livernois's Avatar
 
Drives: 1987 Buick Regal Turbo-T
Join Date: Sep 2009
Location: Grand Blanc, MI/Dearborn Heights, MI
Posts: 431
maybe see if your tuner can send you a data log of the situation? it would be interesting to see what is going on during this.

BTW, you wouldn't be the first person to ship his car from that region to have us tune/perform work on their car but I do realize that is an unlikely scenario. See if he can give you a data log.
Andy@Livernois is offline   Reply With Quote
Old 06-19-2013, 12:39 PM   #8
simon.w
 
simon.w's Avatar
 
Drives: 2011 2SS RS 6M Inferno Orange
Join Date: Nov 2010
Location: San Clemente CA
Posts: 375
If you think it is the actuator opening the bypass valve between shifts, you could try a restrictor in the vacuum line. Mine was having the opposite issue because of the lack of vacuum with my big cam ... closing too quickly on accel. Mike at Whipple sent me the restrictor which fixed the issue. Initially the hole was too small, which created what was almost like turbo lag ... so I got a tiny drill bit set and opened up the hole slightly. Now it's perfect.

There's no reason why it wouldn't work in reverse ... slow the opening of the valve.

It is a 1" long step-tapered cylindrical brass that pushes into the vacuum pipe on the actuator, with a tiny hole in it. Looks a bit like a jet out of a holley carburetor that has been stretched. (minus the thread and screwdriver notch)
__________________
732rwhp 644 rwtq 2011 Inferno Orange 2SS, STRUT 22" Icon5 Rims & Grille Kit, Mahle Pistons, Manley H-Beam Rods, Competition Valve Grind, Custom CMS Grind Comp Cam, Comp Cams Valve Springs, ARP Bolts, Melling HV Oil Pump, Whipple SC, 3.5" Pulley, 8 Rib Pulley Kit, Innovators West 10% Overdrive Balancer, 1" 7/8 Stainless LT Headers & 3" Exhaust, ADM Twin Fuel Pump Kit, 80lb/hr FIC Billet Tip Injectors, RX Monster Catch Can, Cold Air Inductions Intake, ADM Race Scoop, Mantic 9000 Series Clutch, Hurst Shifter, Eibach Springs. Motor built by PFAFF Engines. Fitted & tuned by Cunningham Motorsports.
simon.w is offline   Reply With Quote
Old 06-19-2013, 01:52 PM   #9
bct10985
 
Drives: 2010 2SS LS3, 02 Lightning, 98 jeep
Join Date: Nov 2012
Location: dover, de
Posts: 409
Pm Ayousef, he seems to know a lot of technical info and has a Whipple. I think he is from Dubai also
__________________
ECS Novi 1500 supercharger, tsp 2" longtubes, res delete x pipe, pype bomb axleback, zl1 fuel pump, adm fpcm, id850 injectors, aem meth kit, zr1 map, zl1 rocker panels, slp chin splitter, 20x8.5 20x10 black asa gt5 rims, 305 nitto 555R. 600rwhp mustang dyno
Waiting to install- fsp cam kit, McLeod rxt, bmr 1" springs.
bct10985 is offline   Reply With Quote
Old 06-24-2013, 04:23 PM   #10
Ajmalian
 
Drives: 2010 Camaro 2SS/RS, '11 GMC Denali
Join Date: Jul 2010
Location: Dubai, United Arab Emirates
Posts: 208
Quote:
Originally Posted by bct10985 View Post
Pm Ayousef, he seems to know a lot of technical info and has a Whipple. I think he is from Dubai also
As funny as it may sound bro....Yousef is the guy who owns the garage in partnership with my tuner where I got all the jobs carried out in my car. That is if we are talking about the same Yousef. Yousef Al Matar??
Ajmalian is offline   Reply With Quote
 
Reply

Thread Tools

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 -5. The time now is 03:58 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.