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Old 05-19-2013, 01:47 AM   #1
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The ultimate track built ZL1

I am completing several mods to improve handling on the roadcourse as this is where I spend most of my time. Any suggestions on additional items that I should include? I finshed installing everything tonight, however, I am waiting on new wheels as mine were stolen a couple of weeks ago. My wheels will be here this coming week and I will then have tires mounted and slap them on. Cant wait to see how she feels.

The mods are as follows:

Michelin Pilot Super Sport Tires, 285 Front, 315 Rear
Pfadt ZL-Spec Adjustable Sway Bars
Pfadt Lowering Springs
Pfadt Front Trailing Arm Solid Bearing/Bushing
Pfadt Front Lower Control Arm Poly Bushing
Pfadt Solid Mount Aluminum Subframe Bushings
Pfadt Rear Upper Control Arm Poly Bushing
Pfadt Rear Lower Control Arm poly Bushing
Pfadt Rear Trailing Arms and Poly Bushing kit
Racing Brake RB 2-piece Rotors, Front and Rear
Hawk DTC-30 Racing Pads (Front)
Hawk HT-10 Racing Pads (Rear)
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Old 05-19-2013, 02:34 AM   #2
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Very impressive upgrade, should definitely improve your confidence and times. You asked for suggestions or ideas, the only thing I can think of which is not on your list are SS brake lines.
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Old 05-19-2013, 03:17 AM   #3
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Originally Posted by Bad@ssCamaro View Post
Very impressive upgrade, should definitely improve your confidence and times. You asked for suggestions or ideas, the only thing I can think of which is not on your list are SS brake lines.
Thanks for the suggestion. What is the advantage of the SS lines?
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Old 05-19-2013, 03:24 AM   #4
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Stainless steel lines...less fade I suppose?
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Old 05-19-2013, 03:54 AM   #5
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high temp brake fluid too. ATE super blue is great
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Old 05-19-2013, 04:03 AM   #6
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high temp brake fluid too. ATE super blue is great
Thanks, already running Superblue!
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Old 05-19-2013, 04:35 AM   #7
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how about some intercooler mods even if you have no engine mods, sounds like a good idea.

On the other hand, I wonder how much of those aftermarket suspension parts do good other than claim, something like the trailing arms and tie-rods, if they claim to fix wheel hop you arent getting any wheel hop on a roadcourse so what are the benefits, and since those were developed on the SS how much different is the ZL1, does it still need those mods?

Going by the if its not broke dont fix it approach.
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Old 05-19-2013, 06:22 AM   #8
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I'm thinking those tires are in my future as well. I've heard nothing but good about them. Congrats on the mods!!
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Old 05-19-2013, 10:45 AM   #9
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Is there a reason why you went with the DTC30 front instead of a DTC60?

Spending on a road course most of your time, then I will suggest to start with these

Motul 600 brake fluid instead of the superblue
DTC60 or DTC70 for the front pads if you like hawk
5 point racing seat
5 point harness
300-320 mm steering wheel
4 pt roll cage min
minimum r888 285/315 or better yet hoosiers 295/315/335 in 19's
more aero front splitter and carbon wing
minium double or triple adjustable coilovers
camber kit. need more camber/alignment
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Old 05-19-2013, 11:28 AM   #10
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Two questions: Can you weight those rotors and compare them to stock? Can you measure the diameter of the rear Pfadt sway bar? Should be 34mm

I would definitely consider the LG Motorsports rear chassis brace. It only weighs 27-lbs and was track tested to help stiffness of the rear suspension. Also curious to know what alignment specs you're going with.
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Old 05-19-2013, 02:47 PM   #11
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Quote:
Originally Posted by ayousef View Post
how about some intercooler mods even if you have no engine mods, sounds like a good idea.

On the other hand, I wonder how much of those aftermarket suspension parts do good other than claim, something like the trailing arms and tie-rods, if they claim to fix wheel hop you arent getting any wheel hop on a roadcourse so what are the benefits, and since those were developed on the SS how much different is the ZL1, does it still need those mods?

Going by the if its not broke dont fix it approach.
Already have engine mods and cooling taken care of.

In regards to arms, I am more interested in the poly bushings. Stock arms have rubber, poly is MUCH better suited for the track.

Quote:
Originally Posted by MPR View Post
Is there a reason why you went with the DTC30 front instead of a DTC60?

Spending on a road course most of your time, then I will suggest to start with these

Motul 600 brake fluid instead of the superblue
DTC60 or DTC70 for the front pads if you like hawk
5 point racing seat
5 point harness
300-320 mm steering wheel
4 pt roll cage min
minimum r888 285/315 or better yet hoosiers 295/315/335 in 19's
more aero front splitter and carbon wing
minium double or triple adjustable coilovers
camber kit. need more camber/alignment
Sorry, when I said I spend most my time on the road course I meant vs. the drag strip. This is still my daily driver so I gotta keep it somewhat reasonable. I had DTC-60's on and they had to much initial bite. I am trying the 30's to see how they perform.

I am waiting for Pfadt's mag coil over system or else I would have went with coil overs instead of springs.

As soon as the new Recaro's are available for purchase I will be buying them.

Quote:
Originally Posted by DrkPhx View Post
Two questions: Can you weight those rotors and compare them to stock? Can you measure the diameter of the rear Pfadt sway bar? Should be 34mm

I would definitely consider the LG Motorsports rear chassis brace. It only weighs 27-lbs and was track tested to help stiffness of the rear suspension. Also curious to know what alignment specs you're going with.
The RB rotors are a total 16 lbs lighter than the OEM Brembos.
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Old 05-19-2013, 02:51 PM   #12
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Those are going to make a huge difference. Nice choices.

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Old 05-19-2013, 07:52 PM   #13
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Quote:
Originally Posted by DrkPhx View Post
Two questions: Can you weight those rotors and compare them to stock? Can you measure the diameter of the rear Pfadt sway bar? Should be 34mm

I would definitely consider the LG Motorsports rear chassis brace. It only weighs 27-lbs and was track tested to help stiffness of the rear suspension. Also curious to know what alignment specs you're going with.
I am not sure that the chasis brace would be needed since he has the soldid subframes. PFADT devoloped one did not bring that to the market for a reason. they said once you go solid bushings it is just not required. the brace is just added wieght.
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Old 05-19-2013, 08:11 PM   #14
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What engine and cooling mods did you make so far?
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Old 05-20-2013, 01:08 AM   #15
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Quote:
Originally Posted by 69NMYSS View Post
Thanks for the suggestion. What is the advantage of the SS lines?
Quote:
Originally Posted by djnice View Post
Stainless steel lines...less fade I suppose?
Braided stainless steel brake lines (also known as braided stainless steel brake hoses) are flexible hoses fitted to a hydraulic brake system. The intent of braided stainless steel brake lines is to improve brake system effectiveness and longevity as compared to an equivalent system fitted with flexible rubber hoses through near-elimination of hose expansion.

The difference in expansion characteristics between rubber and braided stainless steel brake lines is a result of differences in hose construction. Where rubber hoses typically consist of a rubber inner hose wrapped in a textile reinforcement braid then covered in an additional rubber outer sheath, braided stainless steel hoses typically consist of a Teflon or generic PTFE (polytetrafluoroethylene) inner hose wrapped in a braid consisting of stainless steel wire.

The stainless wire braid more effectively resists expansion due to pressure inside the hose core. This improves brake system effectiveness by more directly transferring operator input (hydraulic pressure) to brake friction surfaces. While available without a coating, the stainless braid is typically coated or covered with a clear or colored material such as PVC (polyvinyl chloride) to protect the wire and inner hose from the elements and chemicals, to protect the vehicle or machine from abrasion, and for an improved appearance.

Coated braided stainless steel hoses have the same essential construction as rubber hoses in terms of an inner hose wrapped in a braid followed by an outer layer, but the different materials in the braided stainless steel hoses offer substantially different and arguably better characteristics.
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Old 05-20-2013, 03:04 AM   #16
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What engine and cooling mods did you make so far?
10% OD lower pulley
Rotofab CAI
Running Torco at 98 Octane
Intercooler recevoir
Upgraded H/X

I do not really need more power for the road course. I am close to about 575rwhp. I would rather focus on handling improvements and weight reduction at this point.
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Old 05-20-2013, 06:36 AM   #17
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Get track tires, you'll be amazed at the difference.
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Old 05-20-2013, 11:35 AM   #18
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Get track tires, you'll be amazed at the difference.
What about the tires they are putting on the new Z/28? Do you think these would be a good track tire for the ZL1?
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Old 05-20-2013, 11:49 AM   #19
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Two questions: Can you weight those rotors and compare them to stock?
Just did rotors on my ZL1 . . weighed them myself.

Front: Stock rotor 27 lbs. RB floating 2 piece 22.5 lbs.

Rear: Stock rotor 23 lbs. RB floating 2 piece 18 lbs.

Total weight loss . . 19 lbs.
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Old 05-20-2013, 02:53 PM   #20
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if your sessions last 25 min like mine, the factory radiator may need to be swapped to a better unit to keep engine coolant temps down. My car would creep to 240+ on a 75 degree day. With my Dewitts unit, the temp was highest in the 230 range.
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Old 05-20-2013, 03:02 PM   #21
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Get track tires, you'll be amazed at the difference.
I would love a set of R compounds. But this is my DD. I will probably end up getting a set of dedicated 19" wheels and r comp tires for the track.
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Old 05-20-2013, 11:28 PM   #22
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How did you decide on the brake compounds? Why the split DTC-30 and HT-10 vs DTC-30 or DTC-60 all the way around?
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Old 05-21-2013, 02:17 AM   #23
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What about the tires they are putting on the new Z/28? Do you think these would be a good track tire for the ZL1?
Pirelli just released a 20" version of the trofeo R tires that are on the Future Z/28. But a few guys in the Z28 forums are positive that it won't make the ZL1 any faster on a track - hahaha.
Pretty sure they will help, Pirelli used the same rubber that is in thier Slick race tires for these.
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Old 05-21-2013, 01:41 PM   #24
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Pirelli just released a 20" version of the trofeo R tires that are on the Future Z/28. But a few guys in the Z28 forums are positive that it won't make the ZL1 any faster on a track - hahaha.
Pretty sure they will help, Pirelli used the same rubber that is in thier Slick race tires for these.
I know what tires I'm going to try next when I wear these Goodyear F-1's out.
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Old 05-21-2013, 01:54 PM   #25
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Nice build OP you have underway.

btw...That's some straight bullshit that some punk ASSes stole your wheels man!
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