Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Solo Performance
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 11-06-2013, 09:56 AM   #1
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
difference between 18" and 20" drag radials?

so i know the obvious differences...less weight, and more sidewall on the 18's. but how much does that really affect your ET and MPH? i mean from the guys that have switched from one to the other, did you notice a big difference? from what i remember the generic formula says that every 100 lbs you loose is a 10th off your ET...but if you're only saving 10lbs or so is it even noticable?
and i get that its unsprung weight so the weigh loss will be more noticable as opposed to just pulling 10 lbs out of say the interior or wherever.

so long story short, is it really worth the extra cash to go from DR's on the oem 20's to 18's? in reality, how much could i gain from it?
__________________
Denis is offline   Reply With Quote
Old 11-06-2013, 10:11 AM   #2
Rhino79



 
Rhino79's Avatar
 
Drives: 2010 Camaro SS L99/Auto
Join Date: Jul 2011
Location: Cabot, AR
Posts: 2,539
Only benefit I see is having more sidewall for the tire to work. Weight from the 20's to 18s isn't going to make a noticeable difference on a drag radial I don't think.
__________________

Home of the quickest street driven late model gm vehicles!
Aaron@gogwatney.com
Ryan@gogwatney.com
Rhino79 is offline   Reply With Quote
Old 11-06-2013, 10:12 AM   #3
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
so if im not having trouble hooking then its really not worth it?
__________________
Denis is offline   Reply With Quote
Old 11-06-2013, 10:49 AM   #4
Camarojt

 
Camarojt's Avatar
 
Drives: 2011camaro SS
Join Date: Nov 2012
Location: Allen, Tx
Posts: 2,207
Once you start adding more power, the hooking part will get more difficult and the extra sidewall will benefit on the 18" vs the 20" but it's not going to be a huge difference between them. Just a slight advantage to the 18".
Camarojt is offline   Reply With Quote
Old 11-06-2013, 12:57 PM   #5
Pro Stock John
Writer
 
Pro Stock John's Avatar
 
Drives: 2010 SS / 1951 Mercury
Join Date: May 2009
Location: Chicago, IL
Posts: 6,577
I hooked on 20" 555R's until I did the converter, and then it was a struggle for me. I went 12.37@112 1.85 -488 DA air, I think I could have gone 12.2 with skinnies or other weight reduction. I went to 18" NT05R's then, still struggling with traction (or marginal tracks really), been 1.66-1.73's.
__________________
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 11-06-2013, 01:26 PM   #6
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
yea the 20" 555R's are hooking right now for sure. so im trying to see if theres a reason to change down to 18's next season.
__________________
Denis is offline   Reply With Quote
Old 11-06-2013, 01:54 PM   #7
Camarojt

 
Camarojt's Avatar
 
Drives: 2011camaro SS
Join Date: Nov 2012
Location: Allen, Tx
Posts: 2,207
Like John experienced, if you go with a stall converter, it becomes a little harder to hook. But when you do hook....HANG ON! Converter is by far my favorite mod.
Assuming you have tires to hold it. Otherwise it's frustrating as hell.
Camarojt is offline   Reply With Quote
Old 11-06-2013, 05:23 PM   #8
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
Well that might do it right here. I plan on doing a stall this winter.
__________________
Denis is offline   Reply With Quote
Old 07-15-2014, 11:30 AM   #9
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
Well I'm gonna revive this thread. Got some 18" Z06 replicas and some 305's for em. We'll see if they make a difference.



__________________
Denis is offline   Reply With Quote
Old 07-15-2014, 11:57 AM   #10
thahemp
Geek
 
thahemp's Avatar
 
Drives: 2012 Black LS3
Join Date: Jan 2012
Location: Derby, KS
Posts: 4,343
Good choice! I never had any 20" drag radials, but just being able to take them off and save the rubber when I'm not using them is worth having an extra set of wheels around. And if you're gonna buy drag wheels... why buy 20s.
__________________
01000111011011110110111101100100001000000110110001 11010101100011011010110010000001110111011010010111 01000110100000100000011101000110100001101001011100 110010000001101111011011100110010100100001

x = ac97968bd3df8f968c8cd3df998a9c94d3df9c8a918bd3df9c 909c94df8c8a9c949a8dd3df92908b979a8ddf998a9c949a8d d3df8b968b8cd1
x = ~x
thahemp is offline   Reply With Quote
Old 07-15-2014, 12:00 PM   #11
Towlie
 
Towlie's Avatar
 
Drives: 2013 2SS/RS L99
Join Date: Jul 2013
Location: Austin, Texas
Posts: 142
That actually looks very nice to me. Let us know how they hook up as I would like to do this at the same time as my stall. Enjoy
Towlie is offline   Reply With Quote
Old 07-15-2014, 12:42 PM   #12
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
oh im sure they'll hook up. i was hooking just fine with the 275 20" radials, these new 305 18" radials should only do a better job. plus the more meaty look is pretty awesome haha.
__________________
Denis is offline   Reply With Quote
Old 07-15-2014, 12:43 PM   #13
Denis


 
Denis's Avatar
 
Drives: 2010 SS
Join Date: May 2012
Location: Yorktown Heights, NY
Posts: 7,706
Quote:
Originally Posted by thahemp View Post
Good choice! I never had any 20" drag radials, but just being able to take them off and save the rubber when I'm not using them is worth having an extra set of wheels around. And if you're gonna buy drag wheels... why buy 20s.
exactly my rational. i dont want to drive on drag radials all the time and eat up the tread. now i have a dedicated track tire and can swap em out as needed.
__________________
Denis is offline   Reply With Quote
Old 07-15-2014, 01:10 PM   #14
mrvenicess

 
mrvenicess's Avatar
 
Drives: 2013 CRT ZL1 auto
Join Date: May 2010
Location: Venice Fl
Posts: 1,389
I have a similar setup but run 305/45 18 Mickey Thompsons on my ZL1 that has a Yank torque converter. 1.50 60 fts.
mrvenicess 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 08:40 PM.


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