CC Wheel for GT

[Ed Sims]

Ok, I finally slapped on the CW wheels aka CCWs on my GT. Here are a few pics for you. Stormcat - are you going to get them? Specs as measured (using my wife's bathroom scale) by me are:

OEM - CCW

front 45 lbs/9.5" - 41 lbs/11.0"

rear 61 lbs/12.0" - 44 lbs/12.5"

I saved 11 lbs with the Ford SVT rotors/hats total so combined with the wheels that is 53 lbs off the GT but most important it is unsprung weight! I mesured the rim width not from the lip but the inner to outer edge on the outside of the wheel. Even if I measured from the inside I think Ford is off. Under stated like their hp/torque?

http://www.ccwheel.com

The track test will be Oct 5 Fri at Thunderhill. Everyone is welcome. PM me.

http://www.hookedondriving.com

Ed

 

[B O N Y]

They look great, what size Eagles?

 

[STORMCAT]

Ed,
The wheels and tires look great !! The yellow letters look real racey.I won't use the NASCAR term around here. What are the tire specs.? We'll be waiting for an on a track comparison between the Good Year's & Hoosiers.. Thanks for sharing..B .

PS: what are the weights of just the wheels??

 

[cobrar1339]

Ed are you adding up your total weight savings?

Wheels/Tires/ Rotors 53

Exhaust 48

Rear Bumper 17

wipers 3

Grille 3.5

Tub and Air compressor 14.5 ( noticed you run with it out)

Sub Total 139

Add back for 2 sets of bets and extinguisher 12

Net savings 127 lbs:biggrin

Dry weight is 3398, means only 1 gallon reserve gas

Your new weight is 3271 dry.

Add 6lbs for every gallon of gas you run with.

Power to weight is 6.18 stock at the under rated 550hp
Your reduced weight = 5.95 if the car were stock

But, I believe you have somewhere around 700rwhp?
That means you new PTW ratio is 4.09ish depending on fuel added:thumbsup

So how do PTW ratios stack up among super cars?

Ultimate Areo 2.33
CCX 3.24
Ed Sims Whipple GT 4.09 Assumed 700 rwhp, 4.15 with 8 gals fuel
McLaren F1 4.33
GT with Pulley / Tune 611 Rwhp 4.89
Enzo 5.0
Carrera GT 5.39
Stock GT based on a real 600 hp ( not rated 550) 5.66
08 Viper 5.75
Stock Ford GT 6.18 based on a known under rated 550hp
C6 Z06 6.33
Lambo 6.41
GT3 RS 7.74

Note: For Ed to match the CCX he would need to to make 889rhwp. A stout 1236 rwhp will match the Ultimate Aero.

Hope you have box to record G's as those tires should pull in excess of 1.3 when warmed up.

 

[cobrar1339]

One question?

The weight savings quoted is that Goodyear Stock F1's to the CCW combo or
Hoosiers and opt GT wheels to CCW?.

 

[fjpikul]

Damn, and I thought CCW stood for carbon center wheel!

 

[MAD IN NC]

I thought it was Concelead Carrying Weapons permit - in Ed's case it might as well be :thumbsup

 

[BlackICE]

Nah, CCW are almost impossible to get in CA!

 

[Ed Sims]

CC Wheels

Cobra R - thanks for the fun to think about calculations! The weights were for the CCW with Goodyear Eagle slicks vs the OEM with Goodyear F1 Supercars. My OEM wheels are the BBS snowflake ones. I think the OEM star wheels may weigh slighly more. I have 724 rwhp & my Mac sub woof speaker is gone with no replacement speaker. Better yet! Watch out Veyron!

Stormcat - are you close to CC Wheels in FL? John seemed like a nice person on the phone. Sure knows wheels. Here are the sizes:

Goodyear Eagle road race slicks front: 25.5 x 10.5 - 18
(G-19 sports car radials?) rear: 28.0 x 12.5 - 18

To increase the selection of rubber the rear wheels are 18" instead of the OEM 19". There is a slight overall tire/wheel size difference. The slicks are slightly larger in profile but not enough for the 1" wheel difference. It's not much. I haven't weighed the CCWs without the tires but I will someday. John at CCW would know. The slicks are $200 each.

Ed

 

[timcantwell]

Those slicks are relatively cheap! The setup looks awesome Ed!

 

[Kirby Vieira]

Looks great. Wonderful conbination of performance and looks.

 

[cobrar1339]

Wow Ed.

724 makes a difference. I guess I should assume a slight weight gain with the Whipple, so lets trade some of the weight of the woofer for that.

At 724rwhp your new dry PTW ratio is: 3.97:eek
Dropping the woofer would get you to 3.96


Sir, I did not have that calc in the bunch, shame on me. Here you go:
The Veyron is porky at 4299lb, but also makes 1001-1050 hp depending on the ambient temp. So at the 1001 rating the PTW is 4.29, at the 1050 rating it comes in at 4.09.



The set-up looks great !, I know you will keep us posted.

The lighter wheel / tire combos were super noticable for me in other cars when braking.

And also at the end of the straights. The straights I think were a result of both grip and ability to get on the gas sooner.

But I think the weight alone will be most noticable on braking. I don't know if you ever go deep enough to get the abs active. But, I was trained to find that point in brake zones in practice. With the slicks I would be able to go almost 10 yards deeper without drama. The instructor kept telling us "Tires stop the car not brakes"

 

[BlackICE]

I know there was a lot of talk about brakes, some people find the stock brake are great, others think they are lacking. With Ed's increase of power, much better tires and Penske shocks. If driven aggressively on a track that is hard on brakes, Ed's next mod may be AP or Brembo brakes. The problem is, those have the same size or slightly bigger rotors. Rotor surface area and mass both need to go up to make a big difference.

More speed through the corners, more speed down the straits, you will dissipate more energy in the brakes. The GT design team found no problems with the brakes, but optimized them for the stock power and tires. They actually down sized the rear brakes to save weight. The bigger size was not needed.

 

[Shadowman]

Ok, I finally slapped on the CW wheels aka CCWs on my GT. Here are a few pics for you. Stormcat - are you going to get them? Specs as measured (using my wife's bathroom scale) by me are:

OEM - CCW

front 45 lbs/9.5" - 41 lbs/11.0"

rear 61 lbs/12.0" - 44 lbs/12.5"

I saved 11 lbs with the Ford SVT rotors/hats total so combined with the wheels that is 53 lbs off the GT but most important it is unsprung weight! I mesured the rim width not from the lip but the inner to outer edge on the outside of the wheel. Even if I measured from the inside I think Ford is off. Under stated like their hp/torque?

http://www.ccwheel.com

The track test will be Oct 5 Fri at Thunderhill. Everyone is welcome. PM me.

http://www.hookedondriving.com

Ed

Ed you gal is looking "HOT"

Thank you for sharing the pictures and the project's progress

All the best

Shadowman

 

[Shadowman]

Wow Ed.

724 makes a difference. I guess I should assume a slight weight gain with the Whipple, so lets trade some of the weight of the woofer for that.

At 724rwhp your new dry PTW ratio is: 3.97:eek
Dropping the woofer would get you to 3.96


Sir, I did not have that calc in the bunch, shame on me. Here you go:
The Veyron is porky at 4299lb, but also makes 1001-1050 hp depending on the ambient temp. So at the 1001 rating the PTW is 4.29, at the 1050 rating it comes in at 4.09.



The set-up looks great !, I know you will keep us posted.

The lighter wheel / tire combos were super noticable for me in other cars when braking.

And also at the end of the straights. The straights I think were a result of both grip and ability to get on the gas sooner.

But I think the weight alone will be most noticable on braking. I don't know if you ever go deep enough to get the abs active. But, I was trained to find that point in brake zones in practice. With the slicks I would be able to go almost 10 yards deeper without drama. The instructor kept telling us "Tires stop the car not brakes"

I like the data points that you shared and there is no doubt that putting your gal on a diet produces huge performance gains and it is much easier in many case when compared to adding even more power however I have a question;

Are all of the gals as indicated based in RWHP? I ask because I did not think that folks such as Porsche and Lamborghini market with these numbers or were the RWHP numbers pulled from secondary sources?.

In Ed's case the crank HP is likely in the 835 range

Takes care

Shadowman

 

[cobrar1339]

I like the data points that you shared and there is no doubt that putting your gal on a diet produces huge performance gains and it is much easier in many case when compared to adding even more power however I have a question;

Are all of the gals as indicated based in RWHP? I ask because I did not think that folks such as Porsche and Lamborghini market with these numbers or were the RWHP numbers pulled from secondary sources?.

In Ed's case the crank HP is likely in the 835 range

Takes care

Shadowman

The data points on all cars, other than stock 550 hp GT are based on advertised FWHP and weights. I used the 600FWHP GT as a footnote. Based on our Rwhp stock numbers, mph in the quarter and Accufabs eng dyno. That seams to be pretty close to what we really have +/-5.

To get to Ed's data, and the Pulley Tune data, I backed into the RWHP to convert to FW and then divide by weight.

Ed's 724 RWHP number was converted to 823FWHP on my calculator. So, we are pretty close when you assumed 835. If you are using a more accurate conversion than I, the numbers I posted would be a tad low,in this case by .05.

In any case it really shows just how powerful these machines really and can become. As I think about what it would take to add just 50 FWHP to and ENZO, CGT, 360, 430, Lambo, GT3, it's staggering in comparison to what we can do. There is no comparison "it's the one".

 

[Shadowman]

The data points on all cars, other than stock 550 hp GT are based on advertised FWHP and weights. I used the 600FWHP GT as a footnote. Based on our Rwhp stock numbers, mph in the quarter and Accufabs eng dyno. That seams to be pretty close to what we really have +/-5.

To get to Ed's data, and the Pulley Tune data, I backed into the RWHP to convert to FW and then divide by weight.

Ed's 724 RWHP number was converted to 823FWHP on my calculator. So, we are pretty close when you assumed 835. If you are using a more accurate conversion than I, the numbers I posted would be a tad low,in this case by .05.

In any case it really shows just how powerful these machines really and can become. As I think about what it would take to add just 50 FWHP to and ENZO, CGT, 360, 430, Lambo, GT3, it's staggering in comparison to what we can do. There is no comparison "it's the one".

Thank you for the reply/answer

"Thumbs Up"

You are so right; the platform as presented by the Team at Ford offers an awful lot of performance growth with very little risk.

Takes care

Shadowman

 

[Kingman]

Has anyone bridged the gap between Track/Street better than Ed so far?

.....and I can't decide if the balance weighs more towards track than street.

 

[cobrar1339]

Tire weights, diameter, TW

I broke out my Goodyear catalog and did some compariosons. I figure this will come up again, so it may be nice to have the data handy. Here is a comparison of the tire weights Radial slicks vs. oem F1's. Those that know the wheel weights can tell the difference in those specs. I made some assumptions below, but not sure if they are 100% accurate.


25.5 X 10.5 -18 Front Diameter 25.9" Weight 21.0 lb
235/45/18 stock Diameter 26.3 Weight 26.0lb

The front slicks are .4" shorter and 5 lbs lighter per tire.


28X12.5-18 Rear Diameter 27.7" Weight 21.4 lb
315/40/19 stock Diameter 28.9" Weight 34 lb:eek

The rear slicks are 1.2" shorter and 12.6 lbs lighter per tire. Wow

Total savings based on 4 tires alone = 35.2 lbs.The bath scale showed a 4 lb savings on the fronts(45vs41). So you have to assume the new front wheel is 1 lb heavier.

The rear showed a savings of 17 lbs (61 vs 44) . That would mean the rear wheels are 4.4 lbs lighter.


But that's not the impressive part !

Front thread width 10.3" vs. 7.7" +2.5 or 5" more up front
Rear thread width 12.4" vs. 10.2" +2.2" or 4.4" more out back

This combo adds a total of 9.4" more rubber on the ground, that's both significantly lighter and stickier. Kinda like adding an extra tire if you add it all up. The lower profile rears drop the gear ratio from 3.31 to 3.45 for even more off corner grunt. SWEEEEET!




Note: As we all know it's hard to weight this stuff to perfection on a bath scale, but we do it. I have my special foot position I use when weighing myself. I know is more accurate and consistent ( consistently about 3 lbs lighter ):lol

 

[Gulf GT]

I ask because I did not think that folks such as Porsche and Lamborghini market with these numbers...
Shadowman

Yep, that's why I had a custom matching sticker set made using the 800HP number (conservative) instead of the RWHP, because when they mention HP numbers, it's almost always flywheel HP. I just love it when the planets align like they did today. This afternoon I was out slow cruising down PCH with my wife minding my own business when an F430 pulled up to a stoplight on the left side of me, and the driver "gunned" the motor so I could hear his "Tubi" exhaust. His passenger then made some kind of smart remark about "It's a Ford", and then looked away like I was driving something not "up to his standards". I then proceeded to tap the throttle on my FRPP rear exit header setup. His passenger almost broke his neck snapping it back around to take a second look at my car. He then pointed out to the driver what was written on the side of my car, and the driver got this blank whitish look on his face. My wife and I simply smiled and waived in a friendly manner and drove away. As we were pulling away, my wife noticed they were saying something to each other that looked like; "800HP?, slicks?, Ford?, holy %$#@!".