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05-15-2019, 10:00 PM
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#1 |
    Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,473
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Anyone running Pirelli DH slick 325/705/19?
So I currently run 680 series but tagging rev limiter at 7100 rpm. Shifting into 5th is just no good, to big of a rpm drop. I run 680 in the front and curious is .9 inch will change the rake of the car or will I not notice such a small change.
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05-16-2019, 07:31 AM
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#2 |
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Drives: ISO ss 1le Join Date: May 2018
Location: FL
Posts: 764
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705 for the rear could be ok, move the wiring harness. It’s only .5 total diameter larger than stock as stock is 27.23 and 705 is 27.72
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05-20-2019, 12:26 AM
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#3 | |
      
Drives: 2020 SS 1LE (previous: 2017 SS 1LE) Join Date: Mar 2012
Location: Canada, eh!
Posts: 5,091
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Quote:
Edit: rake is usually measured in fractions of an inch vs inches, so a bigger wheel/tire in the rear may significantly change it and hence influence the handling. Last edited by TrackClub; 05-20-2019 at 12:38 AM. |
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05-20-2019, 12:03 PM
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#4 |
Drives: ZL1 1LE Join Date: Oct 2016
Location: California
Posts: 1,297
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680 is all the same across the board, it won't matter what wheel and tire he is running, as the diameter will be 680mm regardless.
I ran a 680/705 split once back in the day and it seemed to work ok, a slight bit of rubbing if I remember correctly. Though it was a long time ago so maybe I'm remembering wrong. The last set I had was 680 all around, if I ever do DH's again I will be using 660's on 18's.
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05-20-2019, 12:34 PM
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#5 | |
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Drives: 2020 SS 1LE (previous: 2017 SS 1LE) Join Date: Mar 2012
Location: Canada, eh!
Posts: 5,091
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05-21-2019, 10:01 PM
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#6 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,473
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680 on 18s all corners
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05-21-2019, 10:04 PM
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#7 |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,473
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5th gear can be changed out from .74 to .80
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05-22-2019, 12:31 PM
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#8 | |
Drives: 1LEs Join Date: May 2009
Location: DFW - Texas
Posts: 1,319
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06-13-2019, 02:04 AM
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#9 | |
Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Quote:
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2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
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06-13-2019, 02:05 AM
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#10 | |
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Drives: Track prepped 2018 Camaro ZL1 (a10) Join Date: Aug 2013
Location: Victoria B.C. Canada
Posts: 1,384
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Quote:
__________________
2018 ZL1; Mag 2650 and 2 inch LT Headers , every SPL suspension upgrade, MCS 2 way coilovers, sway bars, square SC3R 325's all the way around, and multiple brake cooling upgrades
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06-13-2019, 06:16 AM
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#11 | |
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corner barstool sitter
Drives: 08 Mustang GT, 19 WRX Join Date: Jul 2012
Location: Eastern Time Zone
Posts: 6,990
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Quote:
Norm
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'08 GT coupe 5M (the occasional track toy)
'19 WRX 6M (the family sedan . . . seriously)  |
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06-13-2019, 08:10 AM
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#12 | |
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Drives: 1LEs Join Date: May 2009
Location: DFW - Texas
Posts: 1,319
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Quote:
2.66 / 1.78 / 1.30 / 1.00 1st - 4th. MM6: 0.74 / 0.50 5th - 6th MG9: 0.80 / 0.63 5th - 6th On another note: The base ZL1 gets the MJK while the ZL1 1LE gets the MH3. Those have the same ratios except for 6th, where they are 0.54 for the MJK and 0.68 for the MH3. Interesting how they get the same fuel economy label though the ZL1 1LE has wider, stickier tires, more aero, and spins 29% (!) more in 6th between the gear ratio and the shorter tires. Hmm. |
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06-13-2019, 10:58 AM
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#13 | |
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Drives: 1LE Join Date: Sep 2017
Location: East Coast
Posts: 1,473
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Quote:
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06-13-2019, 09:37 PM
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#14 | |
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Drives: ZL1 1LE Join Date: Oct 2016
Location: California
Posts: 1,297
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Quote:
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