ET Reduction Stock 20's to 17" Weld RTS (or equivalent) - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

EvoWake · 03-20-2013, 10:09 AM

Hey all..

Just wondering if anyone out there has done back to back track visits with the only variables being weather and switching from the stock 20's to a set of weld's, bogarts, or equivalent slick/skinny setup?

I'm just curious to get an idea of what getting rid of ~100 lbs in rotational mass picks up for you at the strip in e/t

I tried poking around for my answer and didn't find much -

SGOS252382 · 03-20-2013, 12:04 PM

Quote:

Originally Posted by EvoWake

Hey all..

Just wondering if anyone out there has done back to back track visits with the only variables being weather and switching from the stock 20's to a set of weld's, bogarts, or equivalent slick/skinny setup?

I'm just curious to get an idea of what getting rid of ~100 lbs in rotational mass picks up for you at the strip in e/t

I tried poking around for my answer and didn't find much -

You could see a .5 sec improvement with that wheel/tire setup.
Watched a car (only mod was it had been perviously tuned) go from low 13s to 12.6s by switching to 17"wheels/MT drag radials with skinnies up front.

Nitroman28 · 03-20-2013, 12:29 PM

Rule is every 100lb you pick up a tenth. I switched to 17in welds and went from 6.89 to 6.78. 60 went from a 1.53 to 1.49. Runs were on the same day.

EvoWake · 03-20-2013, 01:46 PM

Quote:

Originally Posted by SGOS252382

You could see a .5 sec improvement with that wheel/tire setup.
Watched a car (only mod was it had been perviously tuned) go from low 13s to 12.6s by switching to 17"wheels/MT drag radials with skinnies up front.

Interesting.. Thanks for the input!

Quote:

Originally Posted by Nitroman28

Rule is every 100lb you pick up a tenth. I switched to 17in welds and went from 6.89 to 6.78. 60 went from a 1.53 to 1.49. Runs were on the same day.

That rule of thumb is valid for dead weight in the car. For rotating mass, it's a bit different since you're expending energy the entire way down the strip to accelerate that mass - so arguably you would see a greater improvement than with static weight removal, and in the 1/4 vs the 1/8th.

I would've expected a bit more improvement.. have you run the car in the 1/4? Thanks for sharing your results!

Any others have real world results?

Josh@Lashway · 03-20-2013, 02:51 PM

i went from a 12.9 on stock tires to 12.2 with 17" weld rts skinnes and 28" M&H radials

trw427ss · 03-20-2013, 02:58 PM

I picked .03 in the 60 ft and .12 in the 1/4 mile going from 20's to 18" drag radials and 18" skinny's. It went from 12.12 to 12.00 ET and both tires were hooked up (no spin).

Done on the same day!

EvoWake · 03-20-2013, 04:08 PM

Interesting to see that some are gaining a significant chunk of time while others only a small fraction.

Jayrcr3 · 03-20-2013, 04:20 PM

Quote:

Originally Posted by EvoWake

Interesting to see that some are gaining a significant chunk of time while others only a small fraction.

It's driver experience.

Generally speaking, whatever time you take off your 60ft time you can double that and subtract it from you et.

Also, another reason for the smaller wheels is a taller sidewall. This allows the tire to "wrap up" and spring the car forward off the starting line.

Sent from my HTC One X using Tapatalk 2

dekan513 · 03-20-2013, 06:38 PM

my buddy has ran a 10.7 or 10.8 and consistand 11.0 or lil better. but he put this stockers on to race me since i was on stockers , best he could do was 11.6. but he did go from dr to st. which i would say is harder to do then going from st. to dr. on the same night .

Camarojt · 03-20-2013, 07:25 PM

The reason some are getting a big gain in time, it's not from the weight reduction which is mainly what your question was. The guys getting the big gains like .60 sec was Bc they went from a stock tire or street radial to a drag radial. So hooking up vs spinning is most of their gain.

If you were to put a drag radial on an 17"rim that weighs the same as stock, THEN you turned around and did another drag radial that weighed the differences you get with like say a WELD RTS, the weight reduction in rotational mass alone would bet you about .1-.2 tenths in the quarter.

So make sure you factor out traction if your just wanting to compare the gains of just the weight savings from drag wheels and skinnies.

Rdunn · 03-21-2013, 04:22 PM

Quote:

Originally Posted by Jayrcr3

Generally speaking, whatever time you take off your 60ft time you can double that and subtract it from you et.

incorrect, but thats a pretty common myth.

generally the amount of time taken off your 60' is the exact same amount of time taken off your 1/4 mile.

2SSCAMARO · 03-21-2013, 05:41 PM

Quote:

Originally Posted by Rdunn

incorrect, but thats a pretty common myth.

generally the amount of time taken off your 60' is the exact same amount of time taken off your 1/4 mile.

It's probably mainly because of misleading articles such as this, that the myth you reference is so commonly believed as being fact.

http://www.gmhightechperformance.com...s/viewall.html

Rdunn · 03-21-2013, 08:33 PM

Most likely. That being said its still incorrect.

kwzito · 03-24-2013, 12:28 PM

Quote:

Originally Posted by 2SSCAMARO

It's probably mainly because of misleading articles such as this, that the myth you reference is so commonly believed as being fact.

http://www.gmhightechperformance.com...s/viewall.html

PRICELESS!!!!!!!!!!!

03-20-2013, 10:09 AM	#1
EvoWake SSTOCK Drives: 2010 Camaro 2SS/RS Join Date: Mar 2010 Location: Midwest Posts: 423 View My Garage	ET Reduction Stock 20's to 17" Weld RTS (or equivalent) Hey all.. Just wondering if anyone out there has done back to back track visits with the only variables being weather and switching from the stock 20's to a set of weld's, bogarts, or equivalent slick/skinny setup? I'm just curious to get an idea of what getting rid of ~100 lbs in rotational mass picks up for you at the strip in e/t I tried poking around for my answer and didn't find much - __________________ 2010 Camaro 2SS/RS

03-20-2013, 02:58 PM	#6
trw427ss Drives: 2013 2SS/RS L99 Join Date: Oct 2012 Location: Denham Springs La. Posts: 811	I picked .03 in the 60 ft and .12 in the 1/4 mile going from 20's to 18" drag radials and 18" skinny's. It went from 12.12 to 12.00 ET and both tires were hooked up (no spin). Done on the same day! __________________ 2013 2SS/RS L99/A6 Crystal Red Metallic Tincoat 12.76@108.98mph Bone Stock 12.46@111.19mph with New Era CAI & U/D Pulley 12.12 @ 114.16 after Stainless Power headers and no tune yet on stock P-Zero's! 12.007@ 115.20 With 18" Drag Radials - 11.93 @115.19 Added a PTB 11.76 @116.59 With Yank SS3200 Converter - 11.63 @116.52 After PI and Tuning 11.44 @118.75 New Best 10.72 @127.93 after heads and Cam and Yank SS3600

03-20-2013, 04:08 PM	#7
EvoWake SSTOCK Drives: 2010 Camaro 2SS/RS Join Date: Mar 2010 Location: Midwest Posts: 423 View My Garage	Interesting to see that some are gaining a significant chunk of time while others only a small fraction. __________________ 2010 Camaro 2SS/RS

03-20-2013, 06:38 PM	#9
dekan513 chevy pride Drives: 2ss/rs Join Date: Feb 2012 Location: pikeville ky Posts: 2,141 View My Garage	my buddy has ran a 10.7 or 10.8 and consistand 11.0 or lil better. but he put this stockers on to race me since i was on stockers , best he could do was 11.6. but he did go from dr to st. which i would say is harder to do then going from st. to dr. on the same night . __________________ check out ky speeds fb page https://www.facebook.com/kyspeed

03-21-2013, 08:33 PM	#13
Rdunn Really, Really Fast Drives: 2010 Camaro SS Join Date: Feb 2013 Location: St.Louis,Mo Posts: 686	Most likely. That being said its still incorrect. __________________ Procharger F1X, TH400, E85, CBI Street Cars, DSX Tuning, 1300whp

03-20-2013, 12:29 PM	#3
Nitroman28 Drives: 2010 Camaro SS 416/4L80 Join Date: Oct 2010 Location: Arkansas Posts: 1,835 View My Garage	Rule is every 100lb you pick up a tenth. I switched to 17in welds and went from 6.89 to 6.78. 60 went from a 1.53 to 1.49. Runs were on the same day.

03-20-2013, 02:51 PM	#5
Josh@Lashway Drives: 15' C7, 10' Camaro, 02' Camaro Join Date: Oct 2011 Location: Pompano Beach Posts: 35	i went from a 12.9 on stock tires to 12.2 with 17" weld rts skinnes and 28" M&H radials

03-20-2013, 07:25 PM	#10
Camarojt Drives: 2011camaro SS Join Date: Nov 2012 Location: Allen, Tx Posts: 2,202	The reason some are getting a big gain in time, it's not from the weight reduction which is mainly what your question was. The guys getting the big gains like .60 sec was Bc they went from a stock tire or street radial to a drag radial. So hooking up vs spinning is most of their gain. If you were to put a drag radial on an 17"rim that weighs the same as stock, THEN you turned around and did another drag radial that weighed the differences you get with like say a WELD RTS, the weight reduction in rotational mass alone would bet you about .1-.2 tenths in the quarter. So make sure you factor out traction if your just wanting to compare the gains of just the weight savings from drag wheels and skinnies.