Alignment on a 2009 ACR

**fallen** · 02-06-2019

I had this car for a while (since 2011) and track the car more than a few times a year. I finally adjusted the car to rough track settings, and also put some new R888R tires on it.

I will take it to be aligned this Friday.

Do any track guys have advice on what I should have the shop set camber/caster/toe front and rear to?

I found some old threads on the topic, but am asking this question a new.

Much thanks in advance.

**FrgMstr** · 02-07-2019

When we were doing 1/2 and 1 mile races, we used base SRT specs. Easy to drive around town, still very easy to control and somewhat forgiving at speeds over 170mph.

For road course, auto cross, and CoTA driving, we always went with ACR spec alignment. It is aggressive, hard on the tires, but when you turn in, you will feel it doing what it is supposed to do. If I knew I was going to be doing a lot of street driving during those times, we would put TA spec on.

Viper Alignment ACR TA SRT.jpg

**red heat** · 02-07-2019

how about the gen 4 ACR?

**mjorgensen** · 02-07-2019

Front:

Camber -2.1
Castor +6.5
Toe 0

Rear:
Camber -.8
Castor always stock at .70
Toe .20 degrees total toe in (.10 per side)

**fallen** · 02-07-2019

OK, much thanks to all that have replied! Mark are those the stock specs for the Gen IV ACR? (thanks in advance).

**mjorgensen** · 02-07-2019

Originally Posted by fallen

OK, much thanks to all that have replied! Mark are those the stock specs for the Gen IV ACR? (thanks in advance).

These are the specs "I" like for the G4 cars, some like much more camber than I do, but I feel keeping the tire flatter during turn in feels better and prevents "over turning" the wheel which ruins tires and make it push. I have never liked all the negative camber in the rear either so this is what I recommend. That's all, others will feel different and that's ok everyone's drive style is different so I always ask about what the car does for each before tweaking my numbers.