Good deal. Thanks for fitting the G35 arms. I know we'll all be happier once this is done. I think the new design will only be camber and not caster adjustable since thats where most of the height came from. Thanks again John.

 

Does slamming the car low on coils really change the caster adjustment significantly with stock A arms? I'm dropped on springs and mine is perfect; I didn't screw with it.

 

I also spoke with Jeff this am to make sure he got my email, pics and measurements. He got them today as he has been out sick for few days.

He is sending me a set of arms too so that he has perspective on someone with only Eibach drop and then from Finagle69 on coilover. He also wants pictures of the top of the arm showing how much camber adjustment was needed to correct (and therefore how much extra may be uneccesary). He would also need before and after camber measurements. All this for the reasons Finagle69 describes below. BTW, he does not have immediate access to a G37 hence all the requests for data / pictures.

He also asked if we would help spread the word that SPC will send out bumpstops to anyone that wants to hang in there until this is resolved. The bumpstops will go on the strut which means you have to take the strut out, but it is an option. I suggested that he give Andy @ HPAuto or Eddy @ THMotorworks the instructions on how to get the bumpstops so they could post for everyone. I thought that would come across as more "official". He said he would do that.

 

I am on Eibach and was green as well. I did dial in -0.5 degree on caster when I put the arm in just to bring it closer to nominal, but it is not needed. And my Eibach settled in at about -1.5" vs. -1.2" and still in spec.

 

Any clue about what they are gonna do about people that already bought them?

 

Caster no, camber yes. Lowering wont affect caster, or shouldnt unless something is bent.

 

I asked that specific question on the temp solution of bumpstops and he said they would be sent to anyone that asked.

I did not ask that specific question on the permanent solution. I was more focused on making sure he had what he needed from me. I was operating under the assumption that new arms would have to be provided at no charge. Sorry I was not more specific. Maybe Andy or Eddy can find that out and post as well along with the how to get bumpstop information.

 

My comment was becasue of this that you stated earlier:
Maybe I misunderstood. Were you saying that the extra height of the SPC A arms was to enable extra caster adjustment?

 

Another point I noticed after installation: The top of the threaded rod of the ball joint protrudes above the nut (the one that TQs to 120lb-ft) a good 3/8" or so after fully TQ'd. If this is shortened, that gains just that much more travel distance. I'll relay that on to Jeff.

 

Yes. caster adjuster eats maybe 1/8"? It's not huge, but any little bit helps.

I didn't change caster on mine, but I think I'd like to give a little negative caster a try. Should help lighten up steering a bit and give a little more bite in corners.

 

But according to Hamsters pics, it doensn't look like that is what is hitting the fender. It looks like it's the actual arm.

 

That's true, however, they're thinking of shortening the length of the arms, which will put it in the pocket it should travel into. At that time, then the screw length will be an issue. Just trying to think ahead to maximize the amount of suspension travel and minimize the use or number needed of the urethane washer bump stops.

Edit. Now that i think about it, mine hit both the leading edge of the arm and the top of the threaded rod... I'll find the pic I have of it.

Double Edit. removed

Triple Edit. I found the pic. See attached.

 

Update:

Email from Jeff @ SPC

"Users that are having up stop travel issues can contact SPC and we will send them a set of bump stop spacers, no charge.

The spacers will be for the short term. If the spacers do not resolve the issue then the customer may contact us directly and we will work with them one-on-one to resolve their issue. In the meantime SPC is working diligently to correct the issue. We appreciate their patience in this matter. "

 

The caster height accounts for about an inch of height increase at the end of the arm. The arms had to be made taller to clear the full 360 sweep of the ball joint. Check out the Stillen design. This is the most common way to adjust camber. SPC was being creative and had a good idea in making caster adjustable. It had something its competitors didnt, but we now know why no one else has incorporate caster adjustment in these cars.


I just received by bump stops and Im sitting here scratching my head I received 20 metal L shaped tabs with a pole punched thru and 2 tabs pointing down??? WTF is this. I thought it was a polyurethane bump stop we were being sent??? Anyone else get these in the mail? The P/N on the bag says 721208.

 

wow. I received red translucent urethane washers. I don't know what you've got. The bag is at home in the garage so I'm not sure what the part number is supposed to be, but that number rings a bell.