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Tracking / Autocross / HPDE / Drifting What these cars were built for! |
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01-04-2015, 08:54 AM | #1 |
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Maxxis RC-1 tire notes
Wanted to share some tire data for everyone else who runs the RC-1.
Over 200+ race miles on a set of these bad boys
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01-05-2015, 02:10 PM | #2 |
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Very nice. These are on Ohlins Road and Track kit? Are you using stock kit spring rates are custom rates and valving?
I may try your setup with a new set of RC's. |
01-05-2015, 05:04 PM | #3 |
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I like this thread.
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01-05-2015, 06:25 PM | #4 | |
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"Stock" 380lbs spring front and rear and "stock" valving. Tried a few times to put on 500/550lb springs but the car become too stiff. Even with sticky tires like V710's or Michelin's, it seems the car (or driver) prefers a slightly softer set-up. Next season i will change spring rates only because we've swapped our control arms and the rear could stand to be slightly stiffer. I'm thinking 400/425 range. At some point in the future I'll post scale sheets with corner balancing numbers, just haven't digitized them yet.
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01-05-2015, 08:42 PM | #5 | |
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Maxxis RC-1 tire notes
Quote:
This is an awesome post! Much appreciate your response to my PM... My Ohlins R&T are currently with Ohlins and were just about to get rebuilt with new springs...was going for 450f/500r but I will go for 380f/425r after reading this. Car is my daily and track/AX toy with Ohlins used Apr-Nov. Stock control arms and sways, Nitto NT01 235/40-17 on 17x9 RPF1. Just moved to HPD3 with NASA and practiced gas/steering rotation on LRP AX course a few times, in 2014, so still have a lot to learn. Would like the car to rotate a little easier without much throttle (with JRSC) and it looks like you found a good formula. Looking forward to trying this out, thanks! |
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01-05-2015, 10:11 PM | #6 | |
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01-05-2015, 10:45 PM | #7 | |
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Springs are just one piece of the grand equation then I can't fully comprehend. With our set-up, the stiffer springs caused "flat slides with late hook-up". Meaning by the time the outside tires got traction they were over the curb and mowing the grass. Best measure of all this mumbo-jumbo is driver comfort and lap times. Keep us posted after your first track day with 'em and let us know how it works. If you gain a few seconds, maybe it's worth a shot! Take care
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01-05-2015, 10:50 PM | #8 | |
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Haven't raced LRP since they repaved it. Have a blast!
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01-05-2015, 11:15 PM | #9 | |
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01-05-2015, 11:28 PM | #10 | |
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I'm having fun on their awesome half mile AX track (http://www.limerock.com/index.php?op...690&Itemid=286), very safe setup and a great way to learn car control at lower speeds with very little chance of damaging the car. Perfect for tires that heat cycled out and have some tread left...slide away |
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01-07-2015, 01:53 AM | #11 |
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Most recent scale #'s
1st is standard ohlins 380lbs springs front and rear. 2nd is 500lb front and 550 rear springs wights are without driver
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01-07-2015, 07:17 AM | #12 |
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Maxxis RC-1 tire notes
I think that standard spring rates are 343lb front and rear. Ordered 380lb front and 425lb rear. Will see how they do at NJMP in April and May.
BTW, I thought that standard spring rates were very good as compromise for street and track, and they devoured curbing as if it wasn't there, but it took quite a bit of throttle (with JRSC) to rotate the car. Hope revalved 380lb front and 425lb rear helps, it should. |
01-30-2015, 04:26 PM | #13 |
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I just got my set of RC-1's today and happened to have a set of Hoosier R7's laying around to do some quick comparisons.
First off, width. From what I can tell, Hoosier's always run pretty wide and the R7 is no exception. My RC-1's are 225/45R17 and my R7's are 225/40R17. The R7's are about an inch wider than the RC-1's, despite the fact that they are both considered 225 width. Here's a pic comparing the widths: The overall width of the R7 is just about 10 inches while the RC-1 is a little over 9. When you factor in that the RC-1 has a more rounded edge than the R7, the actual contact patch will be even narrower. I also did a very scientific weight measurement (weigh myself, then weigh myself holding a tire) and found that the RC-1 is a little over 5 pounds heavier than the R7 (24.8lbs vs 19.2). This NASA TT season is going to be interesting running the RC-1's. I'm betting that the points I got back from switching tires and spent on full exhaust and intake will overcome the time lost due to the lower grip of the RC-1's. I'll have to wait until my first event in March at VIR to find out how they compare. |
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01-30-2015, 04:35 PM | #14 |
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Wow, that's a big difference in weight. I figure the width and height differences probably offset each other in terms of weight. Thanks for sharing.
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