Launching modded auto - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

cm5217 · 01-26-2014, 09:42 AM

Hello guys just wanted to get some ideas on improving my launches I have a cam LS3 conversion and a built tranny with a circle D 3600 Stall I have been racing on the stock tires and getting no traction so I got 18 vette rims and getting MT drag radials to help that. My question is guys with about the same setup stall wise where are you guys leaving at rpm wise? I have found with the big stall leaving at idle seems to work the best but not sure when I get the DR. Also guys running DR what pressure do you run? Do you go around the water box or do a nice long burn out? never run DR before so just trying to get ideas.

grocerygetter · 01-27-2014, 10:46 PM

Pm sent. In a nutshell, flash it.

jvoisel · 01-27-2014, 10:54 PM

Flash the converter from ~1200 Rpms and see how it does. Then try launching it higher/lower and see how it effects your 60' times.

Camarojt · 01-27-2014, 11:20 PM

Idle!

grocerygetter · 01-28-2014, 06:13 AM

Yeah idle...but the cam may want to be smoothed a bit then flash it. Depends. Also depends on track prep. Seat time x100.

bhillakaiceberg · 01-28-2014, 08:51 AM

Quote:

Originally Posted by cm5217

Hello guys just wanted to get some ideas on improving my launches I have a cam LS3 conversion and a built tranny with a circle D 3600 Stall I have been racing on the stock tires and getting no traction so I got 18 vette rims and getting MT drag radials to help that. My question is guys with about the same setup stall wise where are you guys leaving at rpm wise? I have found with the big stall leaving at idle seems to work the best but not sure when I get the DR. Also guys running DR what pressure do you run? Do you go around the water box or do a nice long burn out? never run DR before so just trying to get ideas.

NICE!! Look forward to seeing ya out MIR in the spring again!! I got a lil something brewing as well!! Should be a good racing season around here!

62nalide · 01-28-2014, 09:24 AM

Idle.....

jvoisel · 01-28-2014, 10:52 AM

Interesting.. I've launched many stalled autos and always done better launching around 1000-1200 Rpms. Those were all trucks/suvs though. Can't argue with those guys though, there settings records so definitely doing it right.

Take it to the track and let us know how you do!

dekan513 · 01-28-2014, 10:56 AM

just get out there and keep doing diff things till u figure it out .

Padre · 01-28-2014, 11:04 AM

Quote:

Originally Posted by jvoisel

Flash the converter from ~1200 Rpms and see how it does. Then try launching it higher/lower and see how it effects your 60' times.

What he said. ^^^

For psi on MT DR's, I usually run 18 and don't go lower.

Good luck!

Padre

Pro Stock John · 01-28-2014, 12:11 PM

I've tried my 305-45-18's as low as 15 psi cold.

I'd recommend not going lower than 16 psi cold, at 15 the car wandered a bit.

grocerygetter · 01-28-2014, 01:23 PM

yup...15-16 was loose...didn't hook as good at my power either. You need to test but my money is you will like somewhere between 18-20 hot.

cm5217 · 01-28-2014, 05:14 PM

Thanks for all the info I do have some seat time just in not this car just need to work on it some

VADER SS L99 · 01-28-2014, 05:26 PM

No one answered one of your questions about the water box so I will tell you what I always did. I would always try to go around the water box since I had full size front tires. You don't want to put water on the starting line for your rear tires to drive through as well as other drivers. Then back into the water box. Pull just outside the water box where its still kinda wet and damp and do your burnout. The burnout will really depend on your tires. My NT555R's had to have alot of heat in them and a long burnout. I have been told MT's just need a short burnout to clean them off.

01-26-2014, 09:42 AM	#1
cm5217 2K10 SS Drives: 2010 2SS/RS A6 SIM black stripes Join Date: Mar 2009 Location: Southern Maryland Posts: 356	Launching modded auto Hello guys just wanted to get some ideas on improving my launches I have a cam LS3 conversion and a built tranny with a circle D 3600 Stall I have been racing on the stock tires and getting no traction so I got 18 vette rims and getting MT drag radials to help that. My question is guys with about the same setup stall wise where are you guys leaving at rpm wise? I have found with the big stall leaving at idle seems to work the best but not sure when I get the DR. Also guys running DR what pressure do you run? Do you go around the water box or do a nice long burn out? never run DR before so just trying to get ideas. __________________ Tuned with HP tuners by Ryan at GPI...LS3 Conversion GPI SS3 Comp Cam...GPI Heads... GPI modded Intake...GPI built Transmission...Circle D 5C T.C....1 7/8 Kooks LT headers...Vararam tune CAI...Bo White TB...Powerbond 25% UDP...3.91 Gears...Magnaflow 3" Catback...RX catch can...BMR Trailing Arms...BMR Toe Rods...BMR Pro rear cradle bushing kit...Smoked Lenses...Black Chrome SS rims...Black Bowties...Painted Stripes...Barton shifter...Hydro Dipped engine cover...Clear Shield bra (front clip and hood)...

01-27-2014, 10:46 PM	#2
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	Pm sent. In a nutshell, flash it. __________________ -John S.

01-27-2014, 10:54 PM	#3
jvoisel Drives: 2010 2SS/RS M6 Join Date: Aug 2013 Location: New Orleans, La Posts: 436	Flash the converter from ~1200 Rpms and see how it does. Then try launching it higher/lower and see how it effects your 60' times. __________________ 2010 2SS/RS

01-28-2014, 06:13 AM	#5
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	Yeah idle...but the cam may want to be smoothed a bit then flash it. Depends. Also depends on track prep. Seat time x100. __________________ -John S.

01-28-2014, 09:24 AM	#7
62nalide Drives: 2013 SS Join Date: May 2013 Location: DFW Posts: 4,102	Idle..... __________________ https://frankensteined.net/ Martin@Frankensteined.net

01-27-2014, 11:20 PM	#4
Camarojt Drives: 2011camaro SS Join Date: Nov 2012 Location: Allen, Tx Posts: 2,202	Idle!

01-28-2014, 10:52 AM	#8
jvoisel Drives: 2010 2SS/RS M6 Join Date: Aug 2013 Location: New Orleans, La Posts: 436	Interesting.. I've launched many stalled autos and always done better launching around 1000-1200 Rpms. Those were all trucks/suvs though. Can't argue with those guys though, there settings records so definitely doing it right. Take it to the track and let us know how you do! __________________ 2010 2SS/RS

01-28-2014, 10:56 AM	#9
dekan513 chevy pride Drives: 2ss/rs Join Date: Feb 2012 Location: pikeville ky Posts: 2,141 View My Garage	just get out there and keep doing diff things till u figure it out . __________________ check out ky speeds fb page https://www.facebook.com/kyspeed

01-28-2014, 12:11 PM	#11
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	I've tried my 305-45-18's as low as 15 psi cold. I'd recommend not going lower than 16 psi cold, at 15 the car wandered a bit. __________________ 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

01-28-2014, 01:23 PM	#12
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	yup...15-16 was loose...didn't hook as good at my power either. You need to test but my money is you will like somewhere between 18-20 hot. __________________ -John S.

01-28-2014, 05:14 PM	#13
cm5217 2K10 SS Drives: 2010 2SS/RS A6 SIM black stripes Join Date: Mar 2009 Location: Southern Maryland Posts: 356	Thanks for all the info I do have some seat time just in not this car just need to work on it some __________________ Tuned with HP tuners by Ryan at GPI...LS3 Conversion GPI SS3 Comp Cam...GPI Heads... GPI modded Intake...GPI built Transmission...Circle D 5C T.C....1 7/8 Kooks LT headers...Vararam tune CAI...Bo White TB...Powerbond 25% UDP...3.91 Gears...Magnaflow 3" Catback...RX catch can...BMR Trailing Arms...BMR Toe Rods...BMR Pro rear cradle bushing kit...Smoked Lenses...Black Chrome SS rims...Black Bowties...Painted Stripes...Barton shifter...Hydro Dipped engine cover...Clear Shield bra (front clip and hood)...

01-28-2014, 05:26 PM	#14
VADER SS L99 Drives: 2013 A6 GT 5.0 Join Date: Nov 2009 Location: Edmond, OK Posts: 2,909	No one answered one of your questions about the water box so I will tell you what I always did. I would always try to go around the water box since I had full size front tires. You don't want to put water on the starting line for your rear tires to drive through as well as other drivers. Then back into the water box. Pull just outside the water box where its still kinda wet and damp and do your burnout. The burnout will really depend on your tires. My NT555R's had to have alot of heat in them and a long burnout. I have been told MT's just need a short burnout to clean them off. __________________ BLK/BLK 1SS/RS Ordered 11-01-2009 Took delivery 12-22-2009. Heads/cam/converter/bolt ons. SOLD Feb 2015 to fund 6th gen LT1 SS with 8L90E.