NC allignment

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NC allignment

Postby scottalej » Wed Mar 01, 2017 6:51 am

I'd appreciate your advice for allignment for my 2011 PRHT 2.0 which is lowered on stiffer springs (Front: 70 N/mm Rear: 50 N/mm) with koni sport shocks. It sits at 325mm front and 320mm rear. It also has a 300 bhp turbo conversion. I'm looking for a stable fast road setup for twisty roads with predictable on the limit handling (for wet roads) and even tyre wear. Toe also in degrees if possible.
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Re: NC allignment

Postby Brian » Wed Mar 01, 2017 8:44 am

ALIGNMENT:

Alignment depends much on what you do with the car. Assuming no autocross or track use, for pure street driving my suggestion is:

Front Camber -1.2
Toe IN 1/32nd per side (some shops call this 1/16th 'total' toe in).
Caster 6

Rear Camber -1.2
Toe IN 1/32nd per side

Autocross customers will often toe OUT the front, track users often toe ZERO front and rear. You might find you cannot get these numbers on the camber, take what you can get. So, if you can only get to 1.1 negative each side, take that. If you can get 1.4 negative, take it as long as you can get it both right and left side.
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www.good-win-racing.com
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Re: NC allignment

Postby ScottM489 » Thu Mar 02, 2017 5:10 am

Brian wrote:ALIGNMENT:

Alignment depends much on what you do with the car. Assuming no autocross or track use, for pure street driving my suggestion is:

Front Camber -1.2
Toe IN 1/32nd per side (some shops call this 1/16th 'total' toe in).
Caster 6

Rear Camber -1.2
Toe IN 1/32nd per side

Autocross customers will often toe OUT the front, track users often toe ZERO front and rear. You might find you cannot get these numbers on the camber, take what you can get. So, if you can only get to 1.1 negative each side, take that. If you can get 1.4 negative, take it as long as you can get it both right and left side.



Hi Brian,

Would mainly an AutoX setup for an ND be the same or is the ND a different setup?
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Re: NC allignment

Postby Brian » Thu Mar 02, 2017 9:42 am

Autocross setup is different, see Andy Holis article current Grassroots. He gives up caster to get as much camber as he can at heights allowed for Stock/Street class...which is about half an inch under stock height if you use KONI SPORT shocks with stock springs. The Koni shocks are legal because same length as stock shocks per the rules... yet lower pressure and that helps get you more camber because car sits lower.

Once on coilovers for STR the game changes again, and not a lot of agreement because lots of room for personal preference. Thus, for STR I can tell you what I like, typically 2.8 negative camber front, 2.2 negative rear and slight tow out at the front, zero or slight rear tow in. Often for track days I will 'fix' that tow to zero.
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Re: NC allignment

Postby 1200bruce » Fri Mar 03, 2017 7:08 am

Thanks Brian.
2008 Miata GT 6 speed man. RHT
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Re: NC allignment

Postby mdw1000 » Mon Mar 20, 2017 8:30 am

Brian,

What about a car on the stock "sport" suspension that is mostly street driven but used for a few autocross events a year? Would you just recommend using your street alignment settings above?

Thanks!
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Re: NC allignment

Postby Brian » Tue Mar 28, 2017 1:03 pm

Same....or as near these settings as you can get at stock height (you likely will not get this much camber, take what you can get as long as you even up the numbers side to side.


Front Camber -1.2
Toe IN 1/32nd per side (some shops call this 1/16th 'total' toe in).
Caster 6

Rear Camber -1.2
Toe IN 1/32nd per side
Brian Goodwin
Good-Win Racing
www.good-win-racing.com
Brian
Site Admin
 
Posts: 7504
Joined: Tue Feb 15, 2005 11:44 am
Location: San Diego CA

Re: NC allignment

Postby mdw1000 » Tue Apr 04, 2017 11:33 am

Thanks, Brian!

Local shop was able to get -1.2 up front on stock suspension.
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