Looks like we'll be trying an R3 in B-Stock!
11-22-2008, 09:43 AM
#52
Again, I'll be dynoing it on our Dynojet soon, so we know for sure!
Oh, and the OTS Konis days' are numbered... they didn't call me shock-boy for nothing!
11-22-2008, 11:39 AM
#53
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I'd be interested in seeing what you develop.
12-09-2008, 09:51 AM
#54
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All three are very similar in Section Width when you measure them on the same wheel width, the published Hoosier spec is done on a 9" wheel for the 235/30R19 and 8.5" wheel on the 245/35r18, here's the estimated section width for 8" wheels:
235/30R19 A6 ..... 9.8" estimated section width for a 8" wheel 25.6" OD
245/35R18 A6 ..... 9.6" estimated section width for a 8" wheel 24.7" OD
245/35R18 V710 .... 9.6" estimated for a 8" wheel 24.8" OD
Other common B-stock options:
285/30R18 A6 ..... 10.6" estmiated section width for a 8" wheel 24.9" OD
255/35R18 A6 (NEW) ..... 10.3" estimated section width for 8" wheel 24.8" OD
295/30R18 A6 ........ 10.7" estimated section width for a 8" wheel 25.3" OD
Chris H
235/30R19 A6 ..... 9.8" estimated section width for a 8" wheel 25.6" OD
245/35R18 A6 ..... 9.6" estimated section width for a 8" wheel 24.7" OD
245/35R18 V710 .... 9.6" estimated for a 8" wheel 24.8" OD
Other common B-stock options:
285/30R18 A6 ..... 10.6" estmiated section width for a 8" wheel 24.9" OD
255/35R18 A6 (NEW) ..... 10.3" estimated section width for 8" wheel 24.8" OD
295/30R18 A6 ........ 10.7" estimated section width for a 8" wheel 25.3" OD
Chris H
12-09-2008, 12:35 PM
#56
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Cool - will you be testing them back-to-back with your current 285's? Shawn and I plan to pick up a set from Tirerack around mid-May for the Finger Lakes NT and DC Pro.
12-09-2008, 12:56 PM
#58
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We're starting on V710's, will run the hoosiers for a few months in the summer and make our pick as to what we feel is the faster tire to run at Nats.
12-09-2008, 01:59 PM
#59
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IMHO- adjusting to the surface change at Lincoln will be a much bigger variable than the difference between the 295/285/255 A6 or running the V710. Similar to the first day of Nat'ls this year, the drivers who adapt to the unfamilar surface will have the advantage again this year.
Chris H
Last edited by Zoom4Three; 12-09-2008 at 03:46 PM.
12-09-2008, 02:53 PM
#60
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Yes, the plan would be to back to back them under controlled conditions.
IMHO- adjusting to the surface change at Lincoln will be a much bigger variable than the difference between the 295/285/255 A6 or running the V710. Similar to the first day of Nat'ls this year, the drivers who adapt to being first out on the HPT surface will have the advantage again this year.
Chris H
IMHO- adjusting to the surface change at Lincoln will be a much bigger variable than the difference between the 295/285/255 A6 or running the V710. Similar to the first day of Nat'ls this year, the drivers who adapt to being first out on the HPT surface will have the advantage again this year.
Chris H
12-12-2008, 11:16 AM
#65
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FWIW, Foley and I tried the Mazdacomp bar on my car in '07. I didn't like it, he wanted to stick with it through Nationals. When he hopped into Jon's car this season they decided to stay with the OEM bar. Hiromoto tried the Whiteline bar in '07, then went back to OEM for '08. It seems to have worked out for them this year.
12-12-2008, 12:05 PM
#66
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No problem. It's always good to experiment.
FWIW, Foley and I tried the Mazdacomp bar on my car in '07. I didn't like it, he wanted to stick with it through Nationals. When he hopped into Jon's car this season they decided to stay with the OEM bar. Hiromoto tried the Whiteline bar in '07, then went back to OEM for '08. It seems to have worked out for them this year.
FWIW, Foley and I tried the Mazdacomp bar on my car in '07. I didn't like it, he wanted to stick with it through Nationals. When he hopped into Jon's car this season they decided to stay with the OEM bar. Hiromoto tried the Whiteline bar in '07, then went back to OEM for '08. It seems to have worked out for them this year.
We ran the stock FSB for the majority of this season and tried a few events on the stiffer drilled setting. Slaloms and fast transitions were better on the stiffer setting, but the car picked up a terrible mid-corner to corner-exit push in sweepers. We ultimately found that we were both faster on the stock setting and ran the car that way at Nats.
For '09 we want more adjustability as: 1) we plan on testing the new 255 A6's 2) Nats has switched to a concrete surface
From the calculations I ran on the Hotchkis MX-5 bar, the settings are 13%, 33.7% and 60% stiffer than stock. I'll probably bring the stock FSB with us to Lincoln, so that we'll have four stiffness settings for the FSB to choose from.
12-15-2008, 03:19 PM
#67
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I never said the R3 was faster in the 1/4, people keep putting words in my mouth. I said the throttle response and the midrange torque feel better. This has nothing to do with 1/4 mile times. I'd say the '09 car is quicker from 30-60 in 2nd gear, but probably the same in the 1/4 mile.
Again, I'll be dynoing it on our Dynojet soon, so we know for sure!
Oh, and the OTS Konis days' are numbered... they didn't call me shock-boy for nothing!
Again, I'll be dynoing it on our Dynojet soon, so we know for sure!
Oh, and the OTS Konis days' are numbered... they didn't call me shock-boy for nothing!
Have you had a chance to dyno the car yet?
Also, can you verify one thing for me - in your owners manual, how many quarts of oil does your car take for an oil change w/ filter? According to mazdausa.com they list 6 quarts for the 09's which is a change from the 3.7 quarts used in the '04-'08 RX-8's.
If this is truly the case, I'm not sure of the reason behind it. Maybe lower oil temps (from increased volume) to improve engine life???
12-15-2008, 03:45 PM
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Jason,
Have you had a chance to dyno the car yet?
Also, can you verify one thing for me - in your owners manual, how many quarts of oil does your car take for an oil change w/ filter? According to mazdausa.com they list 6 quarts for the 09's which is a change from the 3.7 quarts used in the '04-'08 RX-8's.
If this is truly the case, I'm not sure of the reason behind it. Maybe lower oil temps (from increased volume) to improve engine life???
Have you had a chance to dyno the car yet?
Also, can you verify one thing for me - in your owners manual, how many quarts of oil does your car take for an oil change w/ filter? According to mazdausa.com they list 6 quarts for the 09's which is a change from the 3.7 quarts used in the '04-'08 RX-8's.
If this is truly the case, I'm not sure of the reason behind it. Maybe lower oil temps (from increased volume) to improve engine life???
Tim
12-15-2008, 04:19 PM
#69
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Jason,
Have you had a chance to dyno the car yet?
Also, can you verify one thing for me - in your owners manual, how many quarts of oil does your car take for an oil change w/ filter? According to mazdausa.com they list 6 quarts for the 09's which is a change from the 3.7 quarts used in the '04-'08 RX-8's.
If this is truly the case, I'm not sure of the reason behind it. Maybe lower oil temps (from increased volume) to improve engine life???
Have you had a chance to dyno the car yet?
Also, can you verify one thing for me - in your owners manual, how many quarts of oil does your car take for an oil change w/ filter? According to mazdausa.com they list 6 quarts for the 09's which is a change from the 3.7 quarts used in the '04-'08 RX-8's.
If this is truly the case, I'm not sure of the reason behind it. Maybe lower oil temps (from increased volume) to improve engine life???
If the '09s list more oil for a change they may have adjusted the plug location or the pan itself to allow more oil to drain on a level lift.
https://www.rx8club.com/showthread.php?t=90879.html
12-15-2008, 05:05 PM
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04-08 held 6 quarts. 3.7 was the standard for an oil change on a level lift. The drainage plug is too high on the pan and doesn't allow all oil to drain when level. To get all 6 quarts out you have to use jack up right side, drain, jack up left side, drain, etc.
If the '09s list more oil for a change they may have adjusted the plug location or the pan itself to allow more oil to drain on a level lift.
https://www.rx8club.com/showthread.php?t=90879.html
If the '09s list more oil for a change they may have adjusted the plug location or the pan itself to allow more oil to drain on a level lift.
https://www.rx8club.com/showthread.php?t=90879.html
02-07-2009, 01:29 PM
#72
Finally got the car on the dyno - seems there's really NO difference between the '09 and early car on the dyno... curves the same. Our car turned 178.6hp 126.6tq on our low-reading dynojet. Corresponds to probably 183hp on a typical dynojet. With an exhaust I hope to get about 3-5hp, should be good.
Seems the better 'feel' midrange is due to creative mapping of the throttle by wire, where there's not a linear relationship between pedal and throttle body. I'd assume that it's very digressive, with low throttle applications actually corresponding to much more - 30% pedal = 60% throttle body, etc. It's definitely more aggressive in this manner than the early car.
Overall, happy with the output... if I can get upper 180's before all is done, ,that should be good!
Now, for those 17lb Volk 19x8" +43mm wheels!
And some shocks! And a custom Tri-Point front sway.
Seems the better 'feel' midrange is due to creative mapping of the throttle by wire, where there's not a linear relationship between pedal and throttle body. I'd assume that it's very digressive, with low throttle applications actually corresponding to much more - 30% pedal = 60% throttle body, etc. It's definitely more aggressive in this manner than the early car.
Overall, happy with the output... if I can get upper 180's before all is done, ,that should be good!
Now, for those 17lb Volk 19x8" +43mm wheels!
And some shocks! And a custom Tri-Point front sway.
02-08-2009, 07:13 PM
#74
At least the Houston Tour, maybe the Blytheville Tour... not sure about an Pro's... much of it depends on if we can pull together a partnership to keep me in the TC for a full season. First event with the car will be a Test/Tune on March 1st here in Fort Worth! Looking forward to it!!!
