681968 C10 LS swap first time on the drag strip - The 1947 - Present Chevrolet & GMC Truck Message Board Network

LS short box · 08-03-2020, 09:44 PM

So here is the deal. MN street rod association puts on "The super secret fun run" at the drag strip in Brainerd MN in a couple of weeks from now. I am a member and as member I can run my truck on both the road course and the drag strip as long a it passes tech which should be no problem. The road course will just be a cruise.
So I've never done a proper 1/4" mile pass. Plenty of short burns but nothing against the lights.
So my setup is a LS1/4L60e that makes 380 rwhp that will light them up thru second gear into third. 3000 stall converter. 285 wide tires at the back. Rev limiter is set at 6500. Trans is set to shift at full throttle at 6000 rpm so I don't come up against the rev limiter.
Any tips on leaving the line without just spinning? I watch some of the car shows and they say "pedal it out of the box"? Is the start line of the drag strip much more sticky than the typical tar road.
Any tips will be helpful.

Super73 · 08-05-2020, 02:56 AM

Tell us more about:

- what tire
- what shocks
- what rear suspension
- what front spring

This will help us help you.

LS short box · 08-05-2020, 04:31 PM

Rear tires 285 x 20's. Front tires 255 x 20. Nittos all around
Bel tech sport shocks all around.
Truck has a 4/6 drop with 4" drop rear coil springs and 2" drop blocks. 2" drop springs in the front with 2.5" drop spindles.

akdg87 · 08-05-2020, 05:00 PM

did you put on adjustable trailing arm brackets (anti squat?) with your drop?

That made a huge difference on traction for me. Im making around 700 RWHP and the difference in traction was unbelievable.

LS short box · 08-05-2020, 08:40 PM

No adjustable trailing arm brackets. Just stock.

akdg87 · 08-06-2020, 02:02 PM

I would order a set and try them out, i fought traction for 5 years with my truck. Put on double adjustabe drag shocks, tubbed the rearend for a big tire, swapped to a 29x15x15 tire on a 12" wheel and it would just blow them off even at low boost, first day with the brackets on and it planted the little 275/60r15 tires.

20" wheels arent gonna hook well either.

https://www.tinworksfabrication.com/...t-Bracket.html

LS short box · 08-06-2020, 04:35 PM

Thanks for the advice. After you bolted on the adjustable mounts did you move the trailing arm down?

akdg87 · 08-06-2020, 06:35 PM

double post.

akdg87 · 08-06-2020, 06:45 PM

Quote:

Originally Posted by LS short box

Thanks for the advice. After you bolted on the adjustable mounts did you move the trailing arm down?

Actaully you move them up, im on the second set of holes down from top,

Rob from No Limit has a decent explanation on this forum with drawings of whats going on with suspension.

Custom 68 · 08-07-2020, 09:47 AM

There are posts on here as well to just "flip" the stock ones. That is what I did and I seems to help in the traction part.
They are a pain to remove as they have several rivets holding them in place. They get cut or hammered out.
Dave

**PGSigns** · 08-07-2020, 10:50 AM

If you have never been down the strip you cant compare it to what the truck will do on the street. If they do any track prep at all you will be surprised on the differance.
Jimmy

jessemthompson · 09-02-2020, 09:27 PM

Did you end up running the truck? What were the results?

08-03-2020, 09:44 PM	#1
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	681968 C10 LS swap first time on the drag strip So here is the deal. MN street rod association puts on "The super secret fun run" at the drag strip in Brainerd MN in a couple of weeks from now. I am a member and as member I can run my truck on both the road course and the drag strip as long a it passes tech which should be no problem. The road course will just be a cruise. So I've never done a proper 1/4" mile pass. Plenty of short burns but nothing against the lights. So my setup is a LS1/4L60e that makes 380 rwhp that will light them up thru second gear into third. 3000 stall converter. 285 wide tires at the back. Rev limiter is set at 6500. Trans is set to shift at full throttle at 6000 rpm so I don't come up against the rev limiter. Any tips on leaving the line without just spinning? I watch some of the car shows and they say "pedal it out of the box"? Is the start line of the drag strip much more sticky than the typical tar road. Any tips will be helpful.

08-05-2020, 02:56 AM	#2
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 681968 C10 LS swap first time on the drag strip Tell us more about: - what tire - what shocks - what rear suspension - what front spring This will help us help you. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

08-05-2020, 04:31 PM	#3
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	Re: 681968 C10 LS swap first time on the drag strip Rear tires 285 x 20's. Front tires 255 x 20. Nittos all around Bel tech sport shocks all around. Truck has a 4/6 drop with 4" drop rear coil springs and 2" drop blocks. 2" drop springs in the front with 2.5" drop spindles.

08-05-2020, 05:00 PM	#4
akdg87 Registered User Join Date: Sep 2013 Location: fairbanks, ak Posts: 339	Re: 681968 C10 LS swap first time on the drag strip did you put on adjustable trailing arm brackets (anti squat?) with your drop? That made a huge difference on traction for me. Im making around 700 RWHP and the difference in traction was unbelievable. __________________ build thread 1955 cameo turbo lsx 1993 K1500 Blazer 5.3/4L80e 2009 CTSV Sedan

08-05-2020, 08:40 PM	#5
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	Re: 681968 C10 LS swap first time on the drag strip No adjustable trailing arm brackets. Just stock.

08-06-2020, 02:02 PM	#6
akdg87 Registered User Join Date: Sep 2013 Location: fairbanks, ak Posts: 339	Re: 681968 C10 LS swap first time on the drag strip I would order a set and try them out, i fought traction for 5 years with my truck. Put on double adjustabe drag shocks, tubbed the rearend for a big tire, swapped to a 29x15x15 tire on a 12" wheel and it would just blow them off even at low boost, first day with the brackets on and it planted the little 275/60r15 tires. 20" wheels arent gonna hook well either. https://www.tinworksfabrication.com/...t-Bracket.html __________________ build thread 1955 cameo turbo lsx 1993 K1500 Blazer 5.3/4L80e 2009 CTSV Sedan

08-06-2020, 04:35 PM	#7
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 2,131	Re: 681968 C10 LS swap first time on the drag strip Thanks for the advice. After you bolted on the adjustable mounts did you move the trailing arm down?

08-06-2020, 06:35 PM	#8
akdg87 Registered User Join Date: Sep 2013 Location: fairbanks, ak Posts: 339	Re: 681968 C10 LS swap first time on the drag strip double post. __________________ build thread 1955 cameo turbo lsx 1993 K1500 Blazer 5.3/4L80e 2009 CTSV Sedan Last edited by akdg87; 08-06-2020 at 06:46 PM.

08-07-2020, 09:47 AM	#10
Custom 68 Registered User Join Date: Nov 2001 Location: Springfield, MO Posts: 2,939	Re: 681968 C10 LS swap first time on the drag strip There are posts on here as well to just "flip" the stock ones. That is what I did and I seems to help in the traction part. They are a pain to remove as they have several rivets holding them in place. They get cut or hammered out. Dave __________________ Dave 1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap 1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?) "A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome". "If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"

08-07-2020, 10:50 AM	#11
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: 681968 C10 LS swap first time on the drag strip If you have never been down the strip you cant compare it to what the truck will do on the street. If they do any track prep at all you will be surprised on the differance. Jimmy __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

09-02-2020, 09:27 PM	#12
jessemthompson Registered User Join Date: Nov 2011 Location: Williamsburg, VA Posts: 960	Re: 681968 C10 LS swap first time on the drag strip Did you end up running the truck? What were the results?



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