Notices
C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Auto 6l80 drag launch help

 
Old 07-12-2019, 09:23 AM
  #1  
bdambro518
Junior Member
Thread Starter
 
Member Since: Jun 2019
Location: NY
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default Auto 6l80 drag launch help

Anyone here running stock converter? Iím a stage 3 btr cam car with full bolt ons. Car made 480whp I didnít buy a converter yet. I went to the track and I just cannot seem to get under a 2.0 60ft. Tires donít slip at all it just bogs every time. I tried bringing it to 2k where the car starts to move Iíve gone from idle to flooring it. 2.0-2.2 60ft all night. 119-123mph trap speed most runs 12.1-12.01 I got one 11.96. Anyone have suggestions on how to get it to leave correctly? Pretty much how to launch the car on stock converter I see some guys hitting 11.2 with that trap speed it was also 90* and 3000 DA

Last edited by bdambro518; 07-12-2019 at 10:55 AM.
bdambro518 is offline  
Old 07-12-2019, 04:38 PM
  #2  
Commandercorvette
Junior Member
 
Member Since: Feb 2019
Posts: 31
Received 3 Likes on 2 Posts
Default

I can help , these stock converters are first off HORRIBLE for launching !! My guess is your getting 120-124 MPH trap speeds with a fbo setup and a good stage 3 cam . the crappy thing is you have to remove the rear half powertrain to do so and some guys including myself would advise making a cradle to hold the diff and trans to come out as one piece , then separate them swap converters then bolt everything back up . converters are labor intensive . one of my cars is an ls3 base auto an I run into the same crap when trying to launch it , best 60 ft was in the 1.9 range , converters really wake these things up .

I wish there was an easy fix but the only thing to do , the only thing you CAN do to wake this little beasts up is get a converter and bite the bullet . Yank makes a nice 3200 piece . with no trans cooler using the stock radiator I wouldn't personally go more stall than that .2800 stall would still work great and keep trans temps around the same and knock an easy 3/4 tenths off with traction . If you wanna run an external trans cooler then you can really launch these vettes like a rocket and go way up in stall to 3400,3600,3800 range that with a proper tune up and set up can get you down to the low 11's high 10s with good weather and traction on dedicated drag pack..

hope this helps
- Chris Levangie
Commandercorvette is offline  
The following users liked this post:
mikeCsix (Yesterday)
Old 07-12-2019, 04:53 PM
  #3  
da6speed
CF Senior Member
 
da6speed's Avatar
 
Member Since: Jun 2003
Location: Jackson MS
Posts: 509
Received 18 Likes on 17 Posts
Default

I've never ran a stock converter, so I can't speak from experience on that particular converter.

BUT, a tight converter generally likes being flashed (leave off idle and floor it) rather than being stalled up. You could try that and see if it helps.. But you would GREATLY benefit from a nice aftermarket converter and good tune!
da6speed is offline  
Old 07-12-2019, 07:02 PM
  #4  
realcanuk
CF Senior Member
 
realcanuk's Avatar
 
Member Since: Apr 2011
Location: Montreal
Posts: 7,704
Received 337 Likes on 313 Posts
St. Jude Donor '13
Default

Done 1.6 60ft on stock converter many times. Launching would depend on your setup but try foot braking to maybe around. 1500 rpm.
Experiment to see what works.
realcanuk is offline  
Old 07-12-2019, 07:15 PM
  #5  
[email protected]
Supporting Vendor
 
subfloor@centurytrans's Avatar
 
Member Since: Feb 2011
Posts: 2,311
Received 228 Likes on 173 Posts
C6 of Year Winner (track prepared) 2019
Default

Originally Posted by bdambro518 View Post
Anyone here running stock converter? Iím a stage 3 btr cam car with full bolt ons. Car made 480whp I didnít buy a converter yet. I went to the track and I just cannot seem to get under a 2.0 60ft. Tires donít slip at all it just bogs every time. I tried bringing it to 2k where the car starts to move Iíve gone from idle to flooring it. 2.0-2.2 60ft all night. 119-123mph trap speed most runs 12.1-12.01 I got one 11.96. Anyone have suggestions on how to get it to leave correctly? Pretty much how to launch the car on stock converter I see some guys hitting 11.2 with that trap speed it was also 90* and 3000 DA
While a looser converter would definitely help, the bigger issue (which would still be there with or without an aftermarket converter) is the stock tune which is designed to pull quite a bit of timing when flooring it from a dead stop.

Check out my various posts in this thread (especially #29) where I attempt to explain in detail what's actually going on:

https://www.corvetteforum.com/forums...-stop-wth.html
subfloor@centurytrans is offline  
Old 07-12-2019, 08:36 PM
  #6  
bdambro518
Junior Member
Thread Starter
 
Member Since: Jun 2019
Location: NY
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default

I will look into this for sure. Iím assuming my tuner knowing I like to launch it messed with those settings. I know he changed the trans tune a lot doing drivability things. I every now and then got it to like instantly go when I let off the brake but that run was actually a 12.2. Felt the best launch slowest time. I put an email into circle D just now Iíve heard itís a 30 day build time and then shipping. The next few test and tune nights I will try different launch techniques. Iíd love to see how you do a 1.6 60ft. That would be perfect. I was hoping to wait till winter as I want to go with a d1x and figure do it all at once.
bdambro518 is offline  
Old 07-12-2019, 08:57 PM
  #7  
realcanuk
CF Senior Member
 
realcanuk's Avatar
 
Member Since: Apr 2011
Location: Montreal
Posts: 7,704
Received 337 Likes on 313 Posts
St. Jude Donor '13
Default

Originally Posted by bdambro518
I will look into this for sure. Iím assuming my tuner knowing I like to launch it messed with those settings. I know he changed the trans tune a lot doing drivability things. I every now and then got it to like instantly go when I let off the brake but that run was actually a 12.2. Felt the best launch slowest time. I put an email into circle D just now Iíve heard itís a 30 day build time and then shipping. The next few test and tune nights I will try different launch techniques. Iíd love to see how you do a 1.6 60ft. That would be perfect. I was hoping to wait till winter as I want to go with a d1x and figure do it all at once.
At that time the car had an eforce on it and power probably somewhere in the mid 500s.
Was consistent in its times. Was stock trans, converter, and cam.
Name:  photo647.jpg
Views: 35
Size:  294.4 KB
realcanuk is offline  
Old 07-12-2019, 10:41 PM
  #8  
bdambro518
Junior Member
Thread Starter
 
Member Since: Jun 2019
Location: NY
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default

Dang Iím gonna do some testing tonight
bdambro518 is offline  
Old 07-13-2019, 02:37 PM
  #9  
farmington
CF Senior Member
 
farmington's Avatar
 
Member Since: Aug 2017
Location: metro detroit Michigan
Posts: 1,600
Received 221 Likes on 171 Posts
Default

Find a local place ,industrial
parks work well, to do some 60í testing. I have a perfect one by me. Knocked almost .25 off of my 60í times. All stock I ran [email protected] with a 1.95 60í spinning the tires on launch. Going to get back to the track soon.
farmington is offline  
Old 07-13-2019, 07:58 PM
  #10  
bdambro518
Junior Member
Thread Starter
 
Member Since: Jun 2019
Location: NY
Posts: 12
Likes: 0
Received 0 Likes on 0 Posts
Default

Ya i did about 9 passes the one where it left the best out of nowhere it was my slowest pass go figure lol. I asked my tuner to look into how much timing is pulled and such from a dig when i got the cam and fbo it was like day 4 of owning the car. So it had stock tires and he said it blew them off so the logs didnt help now that i dont spin im going back. Going out tonight for some 1/8th mile stuff at a park like that figure trial by fire with someone next to me.

Last edited by bdambro518; 07-13-2019 at 07:59 PM.
bdambro518 is offline  
Old Yesterday, 12:45 PM
  #11  
HOXXOH
CF Senior Member
 
HOXXOH's Avatar
 
Member Since: Sep 2007
Location: Peoria/Phoenix AZ
Posts: 14,512
Received 992 Likes on 818 Posts
C6 of Year Finalist (performance mods) 2019
Default

I found 1100 rpm was the best launch for me with the stock, the 3200, and the 3600 converters. Once I switched to a 4000, an 1800 rpm launch worked best. My best 60' times with each were 1.85, 1.70, 1.56, and 1.48 respectively. I still have just a bolton car, but manage high 10's.
Like subfloor said, the key is the tune and trial.
HOXXOH is offline  
The following users liked this post:
mikeCsix (Yesterday)

Thread Tools
Search this Thread
Quick Reply: Auto 6l80 drag launch help


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: