Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Bigwormgraphix
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Technical Camaro Topics > Dragstrip and Launch Techniques Discussion


Reply
 
Thread Tools
Old 08-20-2012, 10:47 AM   #1
E.T.


 
E.T.'s Avatar
 
Drives: 2012 Camaro 2SS/RS
Join Date: Jul 2010
Location: Cleveland, OH
Posts: 3,226
3.70 gears and 1/4 mile runs

Could the gears be hurting my 1/4 mile time? I noticed that the car shifts (into 4th, I guess) right near the end of the 1/4. I never went to the track when it was stock, so I don't know how it shifted then, but I'm thinking I would've finished in 3rd. What effect does this have on time, trap speed, etc?
__________________

E.T. is offline   Reply With Quote
Old 08-20-2012, 11:10 AM   #2
LS7 427
10.11 @ 136.32
 
LS7 427's Avatar
 
Drives: Black & Yellow 2SS/RS LPE LS7 427
Join Date: Mar 2010
Location: Redcliff, Alberta
Posts: 929
My guess is your hitting 5th gear not 4th. I have 3.70's and will be switching them out this winter to 3.42's.

Bryan
__________________
My Build Journal

Built, Tuned and Maintained By........
LS7 427 is offline   Reply With Quote
Old 08-20-2012, 11:13 AM   #3
MudderFinger
 
MudderFinger's Avatar
 
Drives: 2011 IOM SS/RS
Join Date: Dec 2010
Location: Virginia
Posts: 729
I have 3.45 and I cross the finish line in 4th@ 6450rpms
__________________
MudderFinger is offline   Reply With Quote
Old 08-20-2012, 11:56 AM   #4
Pro Stock John
Writer
 
Pro Stock John's Avatar
 
Drives: 2010 SS / 1951 Mercury
Join Date: May 2009
Location: Chicago, IL
Posts: 6,274
I'm bolt-on and it shifts into 4th right before the traps, i'm thinking it's your 5th gear shift.

3.70's with a 28.7" tire is still only like a 3.23 with 26's. Plus our cars are heavy.

If I don't try a blower maybe I'll try some 3.91 gears.
__________________
PROJECT HEAVY CHEVY
Camaro Now: Mods for the Masses Part I | Part II
13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
Pro Stock John is offline   Reply With Quote
Old 08-20-2012, 12:28 PM   #5
blackflag
 
blackflag's Avatar
 
Drives: 2012 2SS 45th
Join Date: Feb 2012
Location: South
Posts: 377
Mine hits 4th right before the traps as well. Usually shifts around 101-102.
__________________
#1 2012 NMCA/LSX Challenge Series
2012 2SS 45th A6

Thanks to our Sponsors:
coldairinductions.com (Cold Air Inductions)
loughengines.com (Mike Lough Race Engines)
granatellimotorsports.com (Granatelli Motorsports)

blackflag is offline   Reply With Quote
Old 08-20-2012, 01:32 PM   #6
E.T.


 
E.T.'s Avatar
 
Drives: 2012 Camaro 2SS/RS
Join Date: Jul 2010
Location: Cleveland, OH
Posts: 3,226
It could be fifth. Honestly, I always forget to count since I'm concentrating on driving. Would that be normal though? I thought fourth was good for speeds well into the 100s, even with 3.70s?
__________________

E.T. is offline   Reply With Quote
Old 08-20-2012, 02:00 PM   #7
TinyToasta
 
TinyToasta's Avatar
 
Drives: way too fast....
Join Date: May 2010
Location: Germany
Posts: 297
This helped me a ton:

http://f-body.org/gears/
__________________
custom build forged LSA, 376ci, TVS2300@15psi, 696rwhp/688ft-lbs, built by Henrik Racing, Customkingz, tuned by Jannetty Racing
JRE rough idle cam, JRE ported lower intake manifold, OD cog drive, 6% OD crank pulley, ported ls3 heads, NW102mm TB, 1/2'' RDS spacer, IW 8-rib drive
Pfadt Cradle Bushings, Arms & Rods, Pedders Supercar w/FE4 conversion, ZL1 sways, HE Twin Carbon Street Slayer, ZL1 Rear End (3.73)
CTS-V Brake upgrade, Street: 22'' Vossen CV1, Strip: 18'' Forgestar F14 on MT Street Radials
TinyToasta is offline   Reply With Quote
Old 08-20-2012, 02:21 PM   #8
Pro Stock John
Writer
 
Pro Stock John's Avatar
 
Drives: 2010 SS / 1951 Mercury
Join Date: May 2009
Location: Chicago, IL
Posts: 6,274
ET, is that 12.9@109 your best drag pass to date?
__________________
PROJECT HEAVY CHEVY
Camaro Now: Mods for the Masses Part I | Part II
13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
Pro Stock John is offline   Reply With Quote
Old 08-20-2012, 02:29 PM   #9
Ject
aka Patrick
 
Ject's Avatar
 
Drives: '10 Camaro 2SS '04 Silverado
Join Date: Jan 2009
Location: Derby Kansas
Posts: 3,065
Send a message via Yahoo to Ject
Mine is the same way but with stock gears. It shifts into the next gear like 3-4 car lengths before the finish. (same with paddles too otherwise I redline)
__________________
Current Modifications: Your average Bolt-ons & Suspension Upgrades
GForce Engineering: 9" Rear End, Strange Pro Iron Case w/Moser Nodular 3.70:1 Detroit locker, 3.5" Solid Drive Shaft
Ject is offline   Reply With Quote
Old 08-20-2012, 02:30 PM   #10
E.T.


 
E.T.'s Avatar
 
Drives: 2012 Camaro 2SS/RS
Join Date: Jul 2010
Location: Cleveland, OH
Posts: 3,226
Quote:
Originally Posted by Pro Stock John View Post
ET, is that 12.9@109 your best drag pass to date?
Yep, 12.87 or something....

I think another big factor is 60ft times. I'm barely under 2 sec, so I think there's room for improvement there, even on the Pzeros. Also, I've only been to the track twice, so practice makes perfect.
__________________

E.T. is offline   Reply With Quote
Old 08-22-2012, 07:10 AM   #11
scottywheels
 
Drives: 2010 A6 SS/RS
Join Date: Sep 2009
Location: Connecticut
Posts: 527
I have 3:70 and im over 130mph and still in fourth....
__________________
Scott(Retired Navy)(Paralyzed Triathlete)

New Car 99 Camaro SS with Dart 427, F1x, Rossler 210, 9 inch and BS3... scary ride

SOLD
2010 A6 ss/rs White-VORTECH YSI/LPE fuel system/ID 850's/LG Motorsports full Exhaust/Protorque 3400 stall/Livernois Stage 3 Heads/Cam/Bogarts/ Moroso subframes/JRE Rear with 3:70 gears/Aluminium DS/line lock/drag alignment/Suspension/JW Racing 10 pt cage/13.6 psi 719.34 rwhp 558.4 TQ/ Best Pass 1.51 60ft 10.08 136.78 mph JRE Built
scottywheels is offline   Reply With Quote
Old 08-22-2012, 12:49 PM   #12
SGT Stretch
 
SGT Stretch's Avatar
 
Drives: 2016 Hyper Metallic Blue SS
Join Date: Jun 2011
Location: Abilene TX
Posts: 567
Quote:
Originally Posted by scottywheels View Post
I have 3:70 and im over 130mph and still in fourth....
There is a lot to consider though with your build and everyone else's and that's your FI power over their bolt on power. There's a pretty long couple threads in the drive line section that lays out gears for you. Like me for example I'm swapping my stock 3.45's for 3.91's with the boltons that I have the stock gears either have tapping off the limiter in 3rd at the line or about to.. now when I go to a FI build I will go back to my stock 3.45
SGT Stretch is offline   Reply With Quote
Old 08-22-2012, 01:56 PM   #13
Higgs Boson
in the ZL1 Market
 
Drives: 2014 C7; 2015 2500HD
Join Date: Jun 2012
Location: Texas Hill Country
Posts: 1,237
you want to cross the finish line at 6500 in fourth.

do you have an auto or stick?

manual trans with 3.91 will go 138 MPH at the top of 4th (6500)....

auto trans with 3.70 will go 132 MPH at the top of 4th (6500)....

of course, that is IF you have the power to push those MPH in the quarter. if you are going 109 in the quarter mile, then you are shifting to fourth right at 99 MPH...and crossing the finish line at 5400 RPMs.

Do us all a favor and look at your RPMs when you cross the finish line next time and you can know for sure. If this is the case, you can use even more gear. A 4.10 will cross at 119 in fourth.

btw, an auto with 3.27s will cross in third at 112 mph....probably result in a faster time.

with that said, if you want the most out of the 1/4 with stock type power and have an auto, get 4.10s. if you want up to 500 rwhp, get 3.70s. stock or bolt on power levels aren't going to push 3.70s, they will be more fun on the street though.

don't fear the gear! my race car has 5.83s....contemplating a move to 6.0s....
Higgs Boson is offline   Reply With Quote
Old 08-22-2012, 02:08 PM   #14
JLE58

 
Drives: CGM,twin turbo, cam 2010 SS/RS
Join Date: Mar 2011
Location: ROCKMART, GA
Posts: 2,189
What's killing you 1/4 mile time is that 60ft.
JLE58 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 03:56 AM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.