11.94 on 20" nitto 555's

2006greyGT · July 4th, 2009, 07:36 AM

"How in the hell did that just happen???" was what I was thinking after that run.
The weather was pretty good 82 deg and mild humidity. I just don't get how I could run .24 slower than my best run on M&H drag radials.. on 20" Nitto's at full pressure.
I launched at idle and it didn't slip at all, 1.92 60' , 123 mph. I guess I need smaller DRs but the 20"s seem the same height...

06RedfireGT · July 4th, 2009, 01:21 PM

Damn, nice work.

2006greyGT · July 4th, 2009, 01:28 PM

I think it might be about tire size... OK tire guyz... what is the height of a 255/35 20" vs 325/45 17"

UrbanRedneck · July 4th, 2009, 01:31 PM

wow you ran 4 MPH faster?

05mustang_kb_charged · July 4th, 2009, 01:32 PM

your clutch might be slipping on the drag radials. I feel your pain I went to the track a couple weeks ago and couldn't get my nitto drag radials to hook and was running between 11.8-12.2 @ 126-128 mph.

2006greyGT · July 4th, 2009, 01:40 PM

I guess it could be the clutch... spec 3 clutches aren't all that...

Emay · July 4th, 2009, 02:06 PM

Livernois has been making hot passes on the 20" radials since they released. One of the main reasons I elected to put them on, that and I burned through several sets of street tires dancing all over the street. Good to see another car doing it on the same tire. I made all my 11 sec passes on 18" nittos and have yet to make a prepped pass on the 20's.

I can manipulate the tire pretty good on the street, so I'm expecting to have some confidence on a prepped surface.

Did you try any passes with a higher launch rpm?

navyman8903 · July 4th, 2009, 03:06 PM

11's on 20's is impressive. I know you were not as quick, but you were faster.

07 Boss · July 4th, 2009, 03:06 PM

Originally Posted by 2006greyGT

I think it might be about tire size... OK tire guyz... what is the height of a 255/35 20" vs 325/45 17"

255/35/20 = 27.03" diameter
325/45/17 = 28.52" diameter

tread width (255) X sidewall aspect ratio (35%) X 2 (2 sidwalls in the daimeter) / 25.4 (conversion from mm to inches) + 20 (rim diameter) = 27.03" tire height/diameter.

325 X .45 X 2 / 25.4 + 17 = 28.52"

I run a 28.8" tire and that drops my effective gear ration from 4.10 to 3.84 compared to the stock tire size.

NastyFX4 · July 4th, 2009, 05:38 PM

Are you talking about the Drag Radials or the 'standard' 555s?

Emay, do you recall what times they were running? I know they were running a 20x10" wheel with 305/35/20 Nitto NT555Rs. I thought they were running 10s or low 11s on them.

2006greyGT · July 4th, 2009, 09:32 PM

these are just the street 555's... what size tire do I need for a 17" wheel to be 27" tall??
I suck at math... I am going to try it though

Rep U Boss

2006greyGT · July 4th, 2009, 09:35 PM

I tried it just like you wrote it and got something different

07 Boss · July 5th, 2009, 12:56 AM

Originally Posted by 2006greyGT

these are just the street 555's... what size tire do I need for a 17" wheel to be 27" tall??
I suck at math... I am going to try it though

Rep U Boss

How wide of a tire do you want?

If you want to stay with the 325, a 325/40 would be 27.23", which is pretty darn close. A 325/35 would be just under 26".

mrbigjeep · July 5th, 2009, 01:25 AM

very nice and nice mph

QTRHORSE · July 5th, 2009, 02:17 AM

I run 12.20 on 275/45 17s mickeys drag radials and 12.40 on my 305/35 20s Nitto drag radials. 20s are so tall I dont even get to fourth gear!

July 4th, 2009, 07:36 AM	#1
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 2,950 iTrader: 0 reviews	11.94 on 20" nitto 555's "How in the hell did that just happen???" was what I was thinking after that run. The weather was pretty good 82 deg and mild humidity. I just don't get how I could run .24 slower than my best run on M&H drag radials.. on 20" Nitto's at full pressure. I launched at idle and it didn't slip at all, 1.92 60' , 123 mph. I guess I need smaller DRs but the 20"s seem the same height... __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

July 4th, 2009, 01:21 PM	#2
06RedfireGT One Man Wolf Pack 2006 Mustang GT 13ish....maybe Join Date: Aug 2006 Location: Regulatin On Some OGs Posts: 22,211 iTrader: 2 reviews	Damn, nice work. __________________ ΜΟΛΩΝ ΛΑΒΕ

July 4th, 2009, 01:28 PM	#3
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 2,950 iTrader: 0 reviews	I think it might be about tire size... OK tire guyz... what is the height of a 255/35 20" vs 325/45 17" __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

July 4th, 2009, 01:31 PM	#4
UrbanRedneck Hardcore Enthusiast 2008 Mustang GT 13.124@105.52 Join Date: May 2008 Location: Chicago Posts: 2,138 iTrader: 1 reviews	wow you ran 4 MPH faster? __________________ Hurst Crew Member #20 2008 GT - ARH, C&L, Hurst, BORLA, BMR, Bilstein, FRPP, Axle Exchange. Awesome.

July 4th, 2009, 01:32 PM	#5
05mustang_kb_charged Hardcore Enthusiast 2005 Mustang GT 10.32@137.70 Join Date: Mar 2007 Location: LSU Country Posts: 2,747 iTrader: 0 reviews	your clutch might be slipping on the drag radials. I feel your pain I went to the track a couple weeks ago and couldn't get my nitto drag radials to hook and was running between 11.8-12.2 @ 126-128 mph. __________________ 326 cubic inches of Turbocharged hell will be running soon Tuned by Wes @ TPS

July 4th, 2009, 01:40 PM	#6
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 2,950 iTrader: 0 reviews	I guess it could be the clutch... spec 3 clutches aren't all that... __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

July 4th, 2009, 02:06 PM	#7
Emay May 08 ROTM 2008 Audi S6 Join Date: Oct 2006 Location: S. Elgin Posts: 6,637 iTrader: 3 reviews	Livernois has been making hot passes on the 20" radials since they released. One of the main reasons I elected to put them on, that and I burned through several sets of street tires dancing all over the street. Good to see another car doing it on the same tire. I made all my 11 sec passes on 18" nittos and have yet to make a prepped pass on the 20's. I can manipulate the tire pretty good on the street, so I'm expecting to have some confidence on a prepped surface. Did you try any passes with a higher launch rpm? __________________

July 4th, 2009, 05:38 PM	#10
NastyFX4 Made in U.S.A. 2011 F150 FX4 Join Date: Jan 2009 Location: Florida Posts: 15,028 iTrader: 8 reviews	Are you talking about the Drag Radials or the 'standard' 555s? Emay, do you recall what times they were running? I know they were running a 20x10" wheel with 305/35/20 Nitto NT555Rs. I thought they were running 10s or low 11s on them. __________________ NastyStang's Garage Sale!!

July 4th, 2009, 09:32 PM	#11
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 2,950 iTrader: 0 reviews	these are just the street 555's... what size tire do I need for a 17" wheel to be 27" tall?? I suck at math... I am going to try it though Rep U Boss __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler Last edited by 2006greyGT; July 4th, 2009 at 09:37 PM.

July 4th, 2009, 09:35 PM	#12
2006greyGT Premium Member 2006 Satin Silver GT 11.08@125.22 Join Date: Aug 2007 Location: KC Posts: 2,950 iTrader: 0 reviews	I tried it just like you wrote it and got something different __________________ 2.6l KENNE BELL 298 Stroker, Ported heads Pro Motion Built 3650/McLeod RST/ MGW Short Throw Long tube/O/R X /Borla Touring 8 rib/65 lb injectors/GT500 twin fuel ET Drag Slicks/3.73 gear Detroit Truetrac /CDC AGR Spoiler

July 5th, 2009, 01:25 AM	#14
mrbigjeep I Post Entirely Way Too Much 04 mustang gt 7.21 @ 98 Join Date: Apr 2008 Location: upstate sc Posts: 5,685 iTrader: 0 reviews	very nice and nice mph __________________ cams + 150 shot

July 5th, 2009, 02:17 AM	#15
QTRHORSE Regular 2008 Mustang GT 11.35@123 Join Date: Mar 2009 Location: Johnson City Posts: 382 iTrader: 0 reviews	I run 12.20 on 275/45 17s mickeys drag radials and 12.40 on my 305/35 20s Nitto drag radials. 20s are so tall I dont even get to fourth gear! __________________ CRT-Performance Tuned by Jeff Chambers in Norwalk Ohio, 2.6 Kenne Bell, 62mm T-Body, LT Headers, O/R H-pipe, 4.10s, Foxlake CNC Heads, VSR Stage 2 cams 530/447 Mustang Dyno www.crt-performance.com

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