blipblip

Will 17x9.0 35ET Enkei RPF1 with 255/40/17 TOYO RA-1 work without rubbing issues? Will it clear OEM brake (from 06 6spd) ?

I plan to use Bilstein PSS9 coil over susp.

eviltwinkie

Yes...

blipblip

Additional question:
Found goodwin racing has the same size wheel with 45 ET. Thus, the question is, which one will be better? I assume with a 35 ET the tires will be further apart (+10mm) thus having wider track?

eviltwinkie

The 45 is what is most commonly used, I would stick to that as its a proven setup.

TeamRX8

iTrader: (25)

9.0 +35 with a 255 may rub the rear lip, it will be very close, well IMO it will rub slightly

+45 is no problem though, I ran this in 9.5 with wider tires than yours without issue

Red Devil

Spring rates are a bit funky on those for the RX-8. The rears are stiffer than the fronts. Just a heads-up.

blipblip

What's your driving impression on those?

blipblip

Thanks. Will go with the goodwin racing version then...

Red Devil

I looked into them, but didn't purchase them...so I can't offer anything tangible, just what I found out. If you do a search, you'll see I posted about it a while back inquiring why they would have done that.

https://www.rx8club.com/showthread.p...highlight=PSS9

blipblip

I read your thread. The PSS9 was in my plan because it worked well on a e46 m3. Guess for rx8 its a different story...

Anybody tried those? What other option should I consider?

mac11

iTrader: (1)

I think what was listed in his thread as things he considered is a good place to start. I have also seen one of the vendors around here mention Tein basics as one of the best bang for the buck coilovers around - i dont know how much money and adjustability are a factor to you.

What will you be using the car for? That could narrow down what you are looking for.

mac11

iTrader: (1)

I think what was listed in his thread as things he considered is a good place to start. I have also seen one of the vendors around here mention Tein basics as one of the best bang for the buck coilovers around - i dont know how much money and adjustability are a factor to you.

What will you be using the car for? That could narrow down what you are looking for. Will this be a daily driven + HPDE car or an all out track only setup? and road course> autoX, time attack? etc...

blipblip

NASA time trial TTD class

Red Devil

It appears for TTD that for adjustable dampers like the PSS9, or Tein Flex, etc...that you'll take a 10 point penalty. While off the top of my head you'll only get a 5 point penalty for a non-adjustable. You're also going to take point penalties for running above a 245mm tire, and a few more for the 100+ tread rating.

Before you make a decision, I'd play around with the 19 points and get confirmation from NASA. You don't want to make a mistake and spend money on a combo that will get you moved to C.

Was actually playing around with this yesterday for TTD after seeing your other thread as I've thought about it from time to time.

blipblip

Thanks for the heads up. Non of these will be finalized. It is in the planning stage. I'll bring my plan to NASA TT director before spending money.

blipblip

So far, my first draft of plan:

TOYO RA-1/ NITTO NT-01 +5pts
255 width tires +1pts
Coilover suspension +10pts
F&R sway bar +2pts

Total: 18pts

mac11

iTrader: (1)

don't forget with the adjustable shocks you still have to take the penalty +2 points for aftermarket springs as well. That would put you at +20 and in C-class. Run 245 width tires and you stay in TTD. You may also want to calc out just how much wider the track of the car will be with 9" wide wheels and a +35 offset. There is a penalty for going 2" or more wider than the factory track width.

blipblip

Hmm, didn't consider the track difference. I doubt it'll be wider than 2" but will definitely look into that.

At this point, I think I'll go with +45 offset.

As for suspension, hmm, maybe I should go with springs+shocks......any inputs on this?

mac11

iTrader: (1)

Actually I am on the phone right now discussing what exact classification the Tein Flex should fall under. I won't have anything official until I talk to a NASA official but the thinking right now is that they should probably fall into the +3 rating. And I believe that the tein basics should have no problem being in that +3 rating.

altiain

iTrader: (3)

Wouldn't the sum total of the Flex or Basics be +5? +3 for non-OEM shocks, and +2 for non-OEM spring rates.

mac11

iTrader: (1)

That is what we are thinking now. The question was if they would fall into of the +10 - Non-OEM shcocks/struts/dampers with an external reservoir or more than two ranges of adjustment (must still take points for springs below).

The tein flex having the rebound/compression adjustment was what was in question but I think we settled on that since it is only a single adjustment for rebound & compression simultaniously it should be covered by the rule you are referring to and I was mistaken.

blipblip

Confusing...

Using Bilstein PSS9 as an example, it only offers compression and rebound settings adjustment. Does it mean that it is a 2 'range' adjustment? If that is the case, then the common available coil over system to amateurs should all be considered a +7 (then you add +2 for springs, which total out +9), rather than the +12 total as I originally thought.

From where I came from, we usually call it 2 'way' adjustable shocks....

mac11

iTrader: (1)

+7?

I don't agree that the PSS9s and other commonly available coilovers would fall into thise rule. The one that comes to mind that WOULd is the KW variant 3.

what originally made me think the tein flex's would fall under the +10 rule is the combination of haivng rebound, compression and ride height adjustability. 3 that technically is 3 ranges of adjustment. But then with rebound and compression being controlled by a single adjustment i don't thik it would fall under that rule.

blipblip

Mistake by me. Miss read the lines.

I just sent the national TT director an email looking for clarification. Let's see what he has to say.

altiain

iTrader: (3)

I think you guys are misreading the rule:

This rule is written regarding dampers and dampers only. Notice that the only adjustment examples are variations of damping adjustment - compression, high speed rebound, and low speed rebound.

Spring perch height is external to the damper mechanism, and is not normally considered a damper adjustment.

Disclaimer: I don't normally play with NASA, so maybe they interpret things a little differently, but I've never heard of spring perch height included when describing the number of adjustment ranges on a damper.