Track wheel question
#1
Track wheel question
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.
I plan to use Bilstein PSS9 coil over susp.
#3
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?
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?
#6
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Spring rates are a bit funky on those for the RX-8. The rears are stiffer than the fronts. Just a heads-up.
#7
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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
https://www.rx8club.com/showthread.p...highlight=PSS9
Last edited by Red Devil; 06-28-2007 at 04:02 PM.
#10
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
https://www.rx8club.com/showthread.p...highlight=PSS9
Anybody tried those? What other option should I consider?
Last edited by blipblip; 06-29-2007 at 03:13 PM.
#11
Rotary , eh?
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What will you be using the car for? That could narrow down what you are looking for.
#12
Rotary , eh?
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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...
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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.
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.
#15
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.
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.
#17
Rotary , eh?
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.
#18
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.
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?
#19
Rotary , eh?
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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.
#20
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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.
#21
Rotary , eh?
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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.
#22
From NASA TT Rules
1) Non-OEM shocks/struts/dampers with an external reservoir or more than two ranges of adjustment +10 (example: compression (bump) and both high & low rebound adjustments)(must still take points for springs below).
1) Non-OEM shocks/struts/dampers with an external reservoir or more than two ranges of adjustment +10 (example: compression (bump) and both high & low rebound adjustments)(must still take points for springs below).
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....
![Wconfused](https://www.rx8club.com/images/smilies/Wconfused.gif)
#23
Rotary , eh?
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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....![Wconfused](https://www.rx8club.com/images/smilies/Wconfused.gif)
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....
![Wconfused](https://www.rx8club.com/images/smilies/Wconfused.gif)
non-OEM shocks/struts/dampers with a retail price of greater than $600 per unit (2400 total) or $750 each if sold only as a coilover with spring included ($3000 total). Also "piggyback" external reservoir shocks/coilovers/dampers with a retail price of less than $1050 per unit ($4200 total) - must still take additional points for the springs below +7
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.
#24
2) Non-OEM shocks/struts/dampers with a retail price of greater than $600 per unit ($2400
total) or $750 each if sold only as a coilover with spring included ($3000 total). Also
“Piggyback” external reservoir shocks/coilovers/dampers with a retail price of less than
$1050 per unit ($4200 total)—must still take additional points for the springs below +7
3) Non-OEM or modified/re-valved shocks/struts/dampers +3 (all others)(springs not included)
total) or $750 each if sold only as a coilover with spring included ($3000 total). Also
“Piggyback” external reservoir shocks/coilovers/dampers with a retail price of less than
$1050 per unit ($4200 total)—must still take additional points for the springs below +7
3) Non-OEM or modified/re-valved shocks/struts/dampers +3 (all others)(springs not included)
I just sent the national TT director an email looking for clarification. Let's see what he has to say.
#25
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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.
From NASA TT Rules
1) Non-OEM shocks/struts/dampers with an external reservoir or more than two ranges of adjustment +10 (example: compression (bump) and both high & low rebound adjustments)(must still take points for springs below).
1) Non-OEM shocks/struts/dampers with an external reservoir or more than two ranges of adjustment +10 (example: compression (bump) and both high & low rebound adjustments)(must still take points for springs below).
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.