Homepage Garage Wiki Register Members List Social Groups Calendar Search Today's Posts Mark Forums Read
#Camaro6
Go Back   CAMARO6 > CAMARO6.com General Forums > 2016+ Camaro: 6th Gen Camaro general forum


JUICEDMOTORSPORTS


Post Reply
 
Thread Tools
Old 04-26-2016, 08:32 AM   #1
Blazin383
 
Blazin383's Avatar
 
Drives: 2016 SS
Join Date: Mar 2016
Location: Richland WA
Posts: 438
Direct Injection and Slow Starting

My 2SS seems to need three or four turns before it fires, whereas my 2012 Vette always fired on the first roll. I thought I heard somewhere it was because of the direct injection, but I did a search and couldn't find any discussion on this.

Is it typical? Is it because of the direct injection, and if so, what is it about direct injection that causes it?
Blazin383 is offline   Reply With Quote
Old 04-26-2016, 08:38 AM   #2
Glen e


 
Glen e's Avatar
 
Drives: Garnet 2LT RS
Join Date: May 2013
Location: /Fort Lauderdale
Posts: 9,361
#6 on my list- and I tell you why.....

http://www.camaro6.com/forums/showth...=things+normal
Glen e is online now   Reply With Quote
Old 04-26-2016, 08:41 AM   #3
ParisTNDude
Owning SSes for 50 Years
 
ParisTNDude's Avatar
 
Drives: Garnet red 2016 Camaro 2SS
Join Date: Apr 2010
Location: Paris, TN
Posts: 2,723
I couldn't answer why, but it appears that most if not all of us are experiencing the same thing. I don't think it's an issue or fault at all, just an idiosyncrasy of the engine in our Camaros. The first time I started it after sitting over night, it worried me, but now it's become the norm and it's ok. It seems as though the engine doesn't get an initial dose of fuel for just a second or two?????
__________________
SOLD: 2016 Camaro 2SS, Garnet Red Metalic, 8A, NPP, Nav, Sun Roof, upgraded silver wheels, lit door sills, Ash gray interior.

Now driving a 2017 Silverado, Red Hot, 5.3, regular cab, short bed and lovin it. Waiting until later this year to buy a Z16, C5...it's hard to wait.

Previous Performance Cars:

1966 Chevelle SS 4M 2010 Corvette 6M
1968 Dodge Charger R/T Auto 2012 1SS 6M
1982 Corvette Auto 2010 1SS 6A
1984 Corvette Auto 2016 2SS 8A
1999 Camaro Auto
2002 C5 Corvette 6M
2006 Corvette Auto
ParisTNDude is offline   Reply With Quote
Old 04-26-2016, 08:42 AM   #4
jdasnt3

 
jdasnt3's Avatar
 
Drives: 18 Silverado 1500
Join Date: Dec 2015
Location: Bradenton, FL
Posts: 1,688
Not happening with ours, but we do live in a warm climate.
__________________
16 Red Hot 2SS A8: NPP, CAI Cold air, Ported TB, Fasterproms Ported intake, E85 flex, Formatto tuned. 11.80@118 with 1.92 60' (600-700 DA) on stock run flats.
jdasnt3 is offline   Reply With Quote
Old 04-26-2016, 08:44 AM   #5
Iroc_Z28
 
Iroc_Z28's Avatar
 
Drives: 2017 1SS 1LE
Join Date: Sep 2014
Location: Greater Toronto Area, Ontario, Canada
Posts: 400
Direct Injection engines may have slightly longer cold crank times than that of port fuel injected engines. Direct Injection systems run at higher pressures and the mechanical pump on the engine (driven off the cam) must build up the required pressure before the first injection event occurs (DI runs required around 2000+ psi fuel pressure compared to 40-60 psi for port injection).

Following are typical DI engine crank times using gasoline:




If the temperature is below -22°F (-30°C), the recommendation is to perform an assisted start (such as with the use of a block heater).
__________________
Iroc_Z28 is online now   Reply With Quote
Old 04-26-2016, 08:46 AM   #6
Mr. Wyndham
I used to be Dragoneye...
 
Mr. Wyndham's Avatar
 
Drives: 2018 ZL1 1LE
Join Date: Jan 2007
Location: Buffalo, NY
Posts: 31,847
Send a message via AIM to Mr. Wyndham
Quote:
Originally Posted by Iroc_Z28 View Post
Direct Injection engines may have slightly longer cold crank times than that of port fuel injected engines. Direct Injection systems run at higher pressures and the mechanical pump on the engine (driven off the cam) must build up the required pressure before the first injection event occurs (DI runs required around 2000+ psi fuel pressure compared to 40-60 psi for port injection).

Following are typical DI engine crank times using gasoline:




If the temperature is below -22°F (-30°C), the recommendation is to perform an assisted start (such as with the use of a block heater).
__________________
"Keep the faith." - Fbodfather
Mr. Wyndham is offline   Reply With Quote
Old 04-26-2016, 09:22 AM   #7
andrec10

 
Drives: 2016 Camaro 2SS 6SP/Suby Legacy 6
Join Date: Oct 2015
Location: Hyde Park, NY
Posts: 848
Makes sense now. 2000 PSI is nothing to sneeze at!
__________________
TFPK40

Its Here! Finally came home on 3-31-16! Red Hot 2SS,6 Speed, NPP, MRC, Adrenaline Red interior, Silver Rally Stripes, NAV, Sunroof, 56W Split Spoke Wheels, Body color Hood vents, Body color Splash Guards and winter protection package.

Ordered 1-28-16: 1100
2-11-2016 :2000
2-15-2016: 3000 TPW of 3/7...That went quick!
2-26-2016: 3400 Status TPW 3/7
3-5-2016 : 3800
3-8-2016 : 4300
3-11-2016 : 4B00
3-15-2016 : 4200
3-22-2016 : 4800
3-29-2016 : 6000!
andrec10 is offline   Reply With Quote
Old 04-26-2016, 09:40 AM   #8
HCGxKaLiBeR
 
HCGxKaLiBeR's Avatar
 
Drives: 2009 335i Conv/2016 Carmaro 2SS
Join Date: Apr 2016
Location: CT
Posts: 112
Interesting. My bimmer would start to prime the injectors/pumps after I unlocked the door.

I have not get my 2ss yet. I can't test it. But I think if you unlocked the door and let it sit for 5-10 seconds before you hit the Start Engine button. Maybe it will improve the crank time.
HCGxKaLiBeR is offline   Reply With Quote
Old 04-26-2016, 09:45 AM   #9
JonGSA
 
JonGSA's Avatar
 
Drives: 2016 2SS Hyper Blue
Join Date: Apr 2016
Location: CT
Posts: 176
^ My A4 did the same thing. Same direct injection HPFP setup. Everytime I opened the drivers door, I could hear the fuel pump prime up. No matter how cold or warm it was, it always started in under a second with 2-3 cranks tops. But then again, it was a smaller 4 cylinder. Not a 6.2l beast that has larger rails and pump to prime up before ignition.
__________________
'16 2SS Hyper Blue Metallic - M6 - NPP - MRC -Black bowties - CAI Intake - SW Cat Back w/NPP

Other money pits:
'13 S1000RR
'11 R1200 GS Adventure
'01 HD Sporty 1250
JonGSA is offline   Reply With Quote
Old 04-26-2016, 09:59 AM   #10
Mr. Wyndham
I used to be Dragoneye...
 
Mr. Wyndham's Avatar
 
Drives: 2018 ZL1 1LE
Join Date: Jan 2007
Location: Buffalo, NY
Posts: 31,847
Send a message via AIM to Mr. Wyndham
Quote:
Originally Posted by HCGxKaLiBeR View Post
Interesting. My bimmer would start to prime the injectors/pumps after I unlocked the door.

I have not get my 2ss yet. I can't test it. But I think if you unlocked the door and let it sit for 5-10 seconds before you hit the Start Engine button. Maybe it will improve the crank time.
Priming is different than pressurizing, I imagine, though I'm not a direct-injection engineer.

This car has an electric fuel pump in the tank to pressurize the feed lines and probably prime the main pump. Then the main pump is driven off of the camshaft with a three-lobe cam which produces the high pressures for the system.
__________________
"Keep the faith." - Fbodfather
Mr. Wyndham is offline   Reply With Quote
Old 04-26-2016, 10:10 AM   #11
enzia35


 
Drives: 16 1SS
Join Date: Mar 2014
Location: College Station, TX
Posts: 2,290
It definitely seems pretty cool. I watched the Aston Martin Vulcan start up video, and that thing primed for a longgg time. So I figure it's a race car type thing, haha.
__________________
90 Miata Flyin' Miata Stage 2.5 suspension kit
01 Camaro v6 with some look fast mods-Sold
14 Camaro 1LS in RRM-Sold
16 Camaro 1SS GRM M6 NPP
enzia35 is offline   Reply With Quote
Old 04-26-2016, 10:19 AM   #12
L&M CAMARO 6
 
L&M CAMARO 6's Avatar
 
Drives: Just a fan for now
Join Date: Apr 2014
Location: ROCKPILE, Illinois
Posts: 361
Never had that problem with my DI engines. Must be a gm thing.
L&M CAMARO 6 is offline   Reply With Quote
Old 04-26-2016, 10:30 AM   #13
MMC

 
MMC's Avatar
 
Drives: CGM 2SS/RS, 1987 & 2014 Silverado
Join Date: Oct 2010
Location: Spencerport, NY
Posts: 1,012
The colder the temperature the slower the crank the longer time it takes to develop the required pressure.
__________________
MMC is offline   Reply With Quote
Old 04-26-2016, 10:41 AM   #14
vtirocz

 
vtirocz's Avatar
 
Drives: 2017 Camaro 1SS M6
Join Date: Apr 2015
Location: Indy
Posts: 1,548
My 3.6L DI engine ('09 Outlook) does not crank long before starting, even in freezing temperatures. I wonder why the system on the LT1 takes so much longer for a seemingly similar setup. Is there a reason the LT1 would take longer to build pressure than the 3.6?
vtirocz is online now   Reply With Quote
 
Post 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 12:56 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.