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87turbo's Avatar
 
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Rim update - after closer inspection by Ye Olde Wheel in Jessup, none were bent. Owner of the race shop thinks the sumi's are simply marginal tires. I have michelins now. The sumi's are going back on the stock rims and into storage.
Old 10-02-2008, 03:22 PM
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Goodyear Eagle F1 GS-D3

= IMHO the best compromise of performance, streetability, quiet, etc...
BTW - I HATE noisey rubber droning out the symphony playing behind me (a problem most hi-perf tires have).
Old 10-03-2008, 09:24 AM
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FWIW -

Hated hated hated F1 GSD3 on the 930. Horrible rubbery feel, crap response, got rid of them with 50 miles on em.

Tire noise is louder than the engine (???)
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Old 10-03-2008, 09:43 AM
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While tread wear is not a concern for some of us folks, to others it is a factor in tire selection. As noted in my earlier post. I'm running B.F. Goodrich G-Force KDW's. They have a tread wear rating of 300, while the stickier KD's have a rating of 200, but the Toyo ra/1's are at 100.
I stress again, my car is a daily driver street car, and so far I'm averaging 12k per year, so tread wear has to a consideration for me. If all goes well with the B.F.G.'s I should get about a year out of the rears and maybe a year & a half out of the fronts.
Mark
Old 10-03-2008, 11:12 AM
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Quote:
Originally Posted by full quack View Post
While tread wear is not a concern for some of us folks, to others it is a factor in tire selection. As noted in my earlier post. I'm running B.F. Goodrich G-Force KDW's. They have a tread wear rating of 300, while the stickier KD's have a rating of 200, but the Toyo ra/1's are at 100.
I stress again, my car is a daily driver street car, and so far I'm averaging 12k per year, so tread wear has to a consideration for me. If all goes well with the B.F.G.'s I should get about a year out of the rears and maybe a year & a half out of the fronts.
Mark
Yeah if you put more than two thousand miles a year on your car than the comp Toyos aren't that great.
Old 10-03-2008, 11:24 AM
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Quote:
Originally Posted by Craig 930 RS View Post
FWIW -
Hated hated hated F1 GSD3 on the 930. Horrible rubbery feel, crap response, got rid of them with 50 miles on em.
Tire noise is louder than the engine (???)

Therefore, the YMMV and IMHO caveats should always be understood! ;-)
Curious what sizes you ran. Mine are 17"x 235F/285R.
Suspension plays a significant role no doubt on how tires react. Mine's much tighter than stock (adj sways, 22/30T bars, ER ASP & bushings) but not a track setup.

A lot of freeways in CA have a surface that several tire treads/compositions react with unfavorably = generating a loud and very irritating drone or whine that at speed competes with the output of my 930 powerplant. Perhaps not a problem for your Zork'd monster, but then my dual pipes aren't exactly quiet either.
Old 10-03-2008, 02:12 PM
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I think they were 235/275?

I think since my car is a track setup that by far the weak point was the tires - squishiness, surprising amt of premature lockup, crappy feel.

A 930 owner can do so much better for tires these days -
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"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 10-03-2008, 03:10 PM
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Sumis is the way to go unless you are looking for those 1/100's of a sec per lap... can't beat the value for the price.
Old 10-04-2008, 05:48 AM
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The asymmetric F1's get much better reviews than the GSD3.

http://www.tyrereviews.co.uk/Tyre/

Oh, R888 is the RA1 equivalent.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
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Old 10-04-2008, 07:07 AM
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Respectfully disagree with the Sumi 1/100 lap deal -

Day to day feel and overall enjoyment is greatly increased with a true performance tire - such as the F1 asymmetric / RA1/PS2/Ecsta MX -- vs other tires.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 10-04-2008, 07:24 AM
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Craig, have you tried the F1 assymetric? They seem to get a good review.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 10-04-2008, 11:07 PM
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Ah yes, the F1 Assym. is right up there at the very top of the best non-R tires - right there with the PS2, higher than the Pilot Sport 2 in fact -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 10-05-2008, 08:43 AM
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I didn't like the sound of them going out of balance or something. Maybe they flat spot easily.
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1981 UK 930. G50/01 shortened, 964 3.8RS Fibreglass Body Kit, 18" Alloys 8.5" F & 10" R, 225's F & 285's R, Special Colour Metallic Blue Paint, FIA Sparco Evo's, A/C and Air Pump removed, Electronic Boost Controller, GHL Headers, Tial46 WG.
Fitting - New service kit.
Needs Fitting - Innovate XD-16 Kit, Kokeln IC. Stephen's K27 HFS, EVO Intake Assy & his Modded USA Fuel Head.

1983 UK 911 3.2 Carrera Sport Coupe. Black, Black Leather with Red Piping, Black Alloy Gear Knob, K&N Air Filter Element, Turbo Tie rods.
Needs Fitting - K&N CO Sensor, Round A/F Dial Gauge, Factory Short Shift Kit.

http://www.danasoft.com/sig/Iamnotanumber.jpg
Old 10-05-2008, 08:55 AM
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What model of Sumi's are people recommending?
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Old 10-23-2008, 07:37 PM
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Old 10-24-2008, 03:47 AM
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It really depends on the size you're looking for, because Sumi's - and most manufacturers - don't have all models for all sizes. Go to the tire rack site and learn more...
Old 10-24-2008, 04:23 AM
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Miguel, How hard have you pushed those tires? I spun my rear end out (punch 2nd and turbo came on then supn me) with some old tires. I am still looking for a new set, and waiting for the eagles. I don't have much of a choice with 315s. can't wait.
Old 10-24-2008, 06:03 PM
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I've pushed the sumis pretty good to where there is very nice feathering going on towards the limit and have never had a problem with them. These are my third set, varying sizes, that I've bought over the years. You may need to adjust your tire pressure to get more understeer until you feel more comfortable and then re-adjust your tire pressure to give the car a more neutral feeling.
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Old 10-24-2008, 06:12 PM
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Quote:
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I've pushed the sumis pretty good to where there is very nice feathering going on towards the limit and have never had a problem with them. These are my third set, varying sizes, that I've bought over the years. You may need to adjust your tire pressure to get more understeer until you feel more comfortable and then re-adjust your tire pressure to give the car a more neutral feeling.
so you would buy them over the good years? I am thinking if there's that much difference between them. I don't have much of a choice. I am sick of waiting on the back orders. I now have the Dunlop 8000 or something. Its hard and old. I don't drive the car much, but when I do, i push it. thanks

Jeff
Old 10-25-2008, 11:41 AM
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There is almost no tire better than the Goodyear F1 Assym - right up there with the Pilot Sport PS2, both incredible tires.
And very expensive!

I bought used PS2s off EBay - 90% tread for $70 each - new they are $310.
Check EBay fur used high end tires - the F1 are too new to have any used yet, FWTW.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 10-25-2008, 12:55 PM
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