6SpeedOnline - Porsche Forum and Luxury Car Resource - Anybody running a 10" wide wheel up front?

6SpeedOnline - Porsche Forum and Luxury Car Resource (https://www.6speedonline.com/forums/)

- Aston Martin (https://www.6speedonline.com/forums/aston-martin-39/)

- - Anybody running a 10" wide wheel up front? (https://www.6speedonline.com/forums/aston-martin/425392-anybody-running-10-wide-wheel-up-front.html)

Anybody running a 10" wide wheel up front?

I've been searching the forums for some time now with out any luck. I'm looking to run a front 19x10 +40 (265/35) and rear 19x11 +52 (305/30). I know the rears fit but I've only seen people running 9" +35 and 9.5" (unknown offset) fronts with a 255 tire. The car will be lowered on coilovers and so I want something aggressive but functional. If all else fails, I'll just start buying wheels to test out.

We run 275x35x18's on AMR spec 10" magnesium wheels for the track. We run stock tire sizes on 19" rims on the street. The 18 setup lowers the center of gravity .400 . Between the tires and the coil overs the ride height is 2.5" lower for track than street.

Any plans to track the car?

chr

Quote:

Originally Posted by era2076 (Post 4744060)

Yeah, I thought about getting a dedicated set of 18’s for the track but for now I’m going to get a set of 19’s. I’m planning on doing coilovers right away but still searching for options outside of the KW’s and BC’s. What offset are your 18’s front and rear?

I'll have to look into it. I purchased them thru VAP. Stuart will have that info. I can tell you we are running brake ducts and with the 10" rim and 275 tire we are not crushing the duct. I am out of town so I will check on Monday.

You should consider giving Penske a call for CO.

chr

Quote:

Set of Aston Martin Racing GT4 Vantage Wheels, by OZ Racing. 18x10" ET45 Square setup. Will fit road cars, with some rubbing on full lock on the front fender liners. Each wheel weighs just 20lbs.

http://www.velocityap.com/AD23-10608...cingwheels.htm

Not street-able. With 275x 35 we have no rubbing.

chr

Wow - I had no idea a 255 could be run on a 10" rim.

chr

Quote:

Originally Posted by era2076 (Post 4744357)

http://www.velocityap.com/AD23-10608...cingwheels.htm

Not street-able. With 275x 35 we have no rubbing.

chr

Exactly what I needed to see! Thanks man. It looks like a 19x10 +40 should fit just fine then since I'll be running a 265 instead of a 275. I'll have to look into the Penske Coilovers.

Quote:

Originally Posted by Kanga (Post 4744358)

I run a 18" x 10" wide front wheel, they are the Speedline Corse Magnesium rims the N24 race car runs. Offset is 45 and I run a 255/40 18 tire with no problems.

Thank you for this! I have been going back and forth with 18's or 19's and I've seen your car on here a few times and love your setup.

See if they will build you an 8300. We have the stock stuff in the box so we can get shock and spring lengths, but I have a feeling they may already have a configuration ready to go. The nice thing about the 8300 is you can easily change spring rates and springs can be purchased from summit.

chr

Quote:

Originally Posted by era2076 (Post 4744651)

What coilovers are you currently running?

KW V3 - I purchased from Vivid Racing. I would not again. Like most selling coil-overs they cannot or will not answer any questions e.g. Spring Rates, Ride Rates - etc.

They are nice on the street, easy to adjust, but I feel they are at the limit for the track. Penske is in the US so you can get technical help. If you are building GT4 spec you should try to get a track worthy spring damper combo.

chr

Not going to build to GT4 Spec but going to use some of the take of parts here and there. Are you planning on upgrading from your KW's anytime soon?

No - there are other upgrades in line. The Nitron R3 is a track setup so not sure it would work on the street.

Quote:

Ride and Single Wheel BumpThe first step in choosing spring stiffness is to choose your desired ridefrequencies, front andrear. A ride frequency is the undamped natural frequency of the body in ride. The higher thefrequency, the stiffer the ride. So, this parameter can be viewed as normalized ride stiffness.Based on the application, there are ballpark numbers to consider.0.5 - 1.5 Hz for passenger cars1.5 - 2.0 Hz for sedan racecars and moderate downforce formula cars3.0 - 5.0+ Hz for high downforce racecars
Lower frequencies produce a softer suspensionwith more mechanical grip, however theresponse will be slower in transient (what drivers report as“lack of support”). Higherfrequencies create less suspension travel for a given track, allowing lower ride heights, and inturn, lowering the center of gravity.Ride frequencies front are rear are generally not the same, thereare several theories to providea baseline. Two examples below show exaggerated plots of what happens with unequal ridefrequencies front and rearas the car hits a bump. In Figure 1, we can see the undampedvertical motion of the chassis with the front ride frequency higher thanthe rear. The first period is the most dominant on the car when looking at frequency phase, due to effects ofdamping to be explained later.

http://www.optimumg.com/docs/Springs...Tech_Tip_1.pdf

If we could get the coil-over builders to provide the ride frequency at each end we would know how to purchase for our goals. This is how I spec-ed the coil-overs for my Cobra and Penske had no problem building them.

chr

Wheels are on their way...