love-my-V8-280Z Posted February 19, 2004 Share Posted February 19, 2004 Phantom, The tires you have, you are not happy with there gripping ability? It seems from the little checking I have done they are the widest tire that will fit... Is this what you have found? Are you running stock off set? ypu have said you want to go to 10 mm off set, How are u going to find that in the Datsun bolt pattern? Terry Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 19, 2004 Share Posted February 19, 2004 On the 280Z a '0' offset wheel, which is what I have, puts a 225 wide tire out to the very edge of the fender well. With a +10mm offset it would move a bit closer to the center of the car which would eliminate the occaisional rubbing I get. It would also allow me to push the envelope possibly to a 235 width. It will require a custom wheel or a FWD wheel with spacers to do that. The Yokohama S306's that I have are excellent everyday tires. They are 'V' rated and are indicating that I will be able to get at least 50K miles out of them. The problem is that they don't even come close to handling the power of my LS1. At this point, after kicking out the Yokohama A032r's because of their road noise, I think I'm going to settle on some Kumho Ecsta V700's. They are a DOT legal competition tire. They will have a lot more stick than the Yoko's. We'll see if it's enough. Quote Link to comment Share on other sites More sharing options...
love-my-V8-280Z Posted February 20, 2004 Share Posted February 20, 2004 Phantom, That is very useful information. I will save it and not be buying those loud tires. As for the grip I hope to find out how happy you are with them. What HP are u running with the LS1? I have a LT1 with 270 HP and have no idea what it will do in a 1/4 mile. Do u have any idea? Terry Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 20, 2004 Share Posted February 20, 2004 Terry, My LS1 is running 311 rwhp (365 flywheel hp) & 326 rwtq. It weighs 3,085 lbs with me in it and turns 12.9@110 in the quarter. I am tire and exhaust restricted at this point. So many factors on 1/4 mile times - gearing, tires, car weight, type transmission, altitude, etc. - it would be very difficult for me to guess what you would do in quarter. Quote Link to comment Share on other sites More sharing options...
love-my-V8-280Z Posted February 20, 2004 Share Posted February 20, 2004 Thanks Phantom, It could be close, you are running 100 HP more than me and are in the 12's . If I dont make it I can squeeze out a 100 HP pretty easy.... Hope to be on the road next summer.. Can I ask you one more question, you seem to understand the offset issue, Im looking at rims with 23MM back spacing. Is this a 4 inch back spaced rim? and is 4" back space a 0 off set? I have read that a 0 off set is what you want. I have read a lot on tire size and I think this is the best tire size to get," 215/50/15" some have problems with 225 hitting the fender and 215/60's bottoming out... Would you agree? Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 20, 2004 Share Posted February 20, 2004 Terry, The original tires on your 280Z were 195/70-14's. To maintain the same diameter you could upsize to 205/60-15's; 215/50-16's or 225/40-17's. If you want to stay with 15" rims you could try for 225/55-15's to maintain tire daimeter or 225/50-15's with a smaller diameter which would help with fender well clearance. A '0' offset means that the mounting surface on a 7" wide rim is dead center or has 3 1/2" back spacing. A +12mm or 1/2" positive offset means 4" backspacing on a 7" rim which moves the tire 1/2" closer to the center of the car - toward the strut and away from the fender lip. I assume you are looking at 7" wide rims? If so, 23mm backspacing is over 7/8" which is too much and will put your tire into the strut if you go 225 , or even maybe 215, in width. If you get a 10-12mm spacer to move the wheel out a bit you should be fine even with 225's. Ross Corrigan at http://www.modern-motorsports.com can help you out there. I bought my wheels from Center Line and had the bolt pattern and offset made to my specs which was the 4-bolt, 114.3mm circle with 0 offset on a 16x7" rim. In retrospect, I wish I had gone with a +10mm offset. that would have allowed me to consider 235 cross-section tires. Hope this helps Quote Link to comment Share on other sites More sharing options...
Tim240z Posted February 20, 2004 Share Posted February 20, 2004 I also got my rims from Centerline, but with coilovers, I could use the mustang backspacing, so I am using 8inch wide rims with 5 inch back spacing which leaves about 1/4 inch gap between the tire and spring. Tim Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 20, 2004 Share Posted February 20, 2004 Dang!!! Got some pricing on some 225/50-16 Kumho Ecsta V700's today. $705.20 with tax, mounting & road hazard from Discount. Double dang!! And that's with a UTOG of 50AA/A!! I may save the S306's until after I see how long they really last. Quote Link to comment Share on other sites More sharing options...
Tim240z Posted February 20, 2004 Share Posted February 20, 2004 I just bought a set of Falkens (245/45-16) mounted, balanced etc for $450.00. They stick like shite to a blanket!! (I also just put a set of Falkens on my Z28 255/50-16s for the same price and they also stick WAYYYY better than the Dunlop Sport 8000s that were on previous). Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 20, 2004 Share Posted February 20, 2004 Yeah - but I didn't have to spend all the $$$$ on the coil-overs. I can just spend the extra $250 over and over again on the tires!! Quote Link to comment Share on other sites More sharing options...
Tim240z Posted February 20, 2004 Share Posted February 20, 2004 Just thinking that the 225s should come out cheaper...unless you have your heart set on Kuhmo.....has nothing to do with suspension....maybe shop around a bit more for better prices? Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 20, 2004 Share Posted February 20, 2004 Tim, The problem is the size. Almost no one makes a competition tire in the 225/50-16 size except Yokohama, Kumho & Michelin. The Yoko's are pricier and very noisy and the Michelins are just plain expensive. Not sure if anyone else around here would have better prices than Discount but I'm sure open to it. Quote Link to comment Share on other sites More sharing options...
love-my-V8-280Z Posted February 20, 2004 Share Posted February 20, 2004 Phanton, Tim, THANKS! You have answered all my qestions, I have a 3 page doc that I have been making in word, cuting and pasteing, and you have solved my misunderstanding in one paragraph.... Terry Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 21, 2004 Share Posted February 21, 2004 Shucks. : Tweren't Nothin Glad to have been able to help. Quote Link to comment Share on other sites More sharing options...
Guest Drb26Z Posted February 26, 2004 Share Posted February 26, 2004 Hey Guys, How would i go about putting 18x7.5's (+45 offset) on the rear and 17x7's (+40 offset) on the front? What would i need to do in the way of spacers and what size tires could/should I run, this is with stock guards that haven't been rolled. With thanks Jonny Wilkinson Quote Link to comment Share on other sites More sharing options...
Guest Looking for apt in Alb Ny Posted February 27, 2004 Share Posted February 27, 2004 73 240z lowered 1.5 inchs with tokico 5 way adjustables.... guys i think I screwed up. I have 15 inch enkei that are 7 inch wide. i bought tires from tire rack that are 225 60 15's which are 25.6 tall. my 225 50 16 24.8 tall which i had before would rub under hard cornering but hardly had a problem. I havent installed them do you reocmmend i send them for a replacement . I was thinking more a 50 seriies than a 60. I dont mind it being shorter than stock. itll keep the car low plus i have a 3.7 diff with with an 82 tranny. orginal diff was a 3.9 to properly mate with the tranny thanks juan 73 240z Quote Link to comment Share on other sites More sharing options...
JMortensen Posted February 27, 2004 Share Posted February 27, 2004 How about rolling the fenders instead of replacing the tires? Jon Quote Link to comment Share on other sites More sharing options...
Guest Looking for apt in Alb Ny Posted February 27, 2004 Share Posted February 27, 2004 to be honest i dont know how to roll the fender ill probably screw that up. but thats not my question. What im asking is if my performance will be hampered with these tires. I really think I want to go 225 50 series and a 15 inch rim. itll sit one inch lower than stock tires at 23.8 inches . with this 60 sidewall i have now it is one inch higher than stock. with the 50 i cant take 2 inches off my ride height and have a setup as if im running 14's. I loved my 14s when I had them but i have my wilwoods on so they wont fit. Im going to send them back. Later Quote Link to comment Share on other sites More sharing options...
Phantom Posted February 27, 2004 Share Posted February 27, 2004 Juan, What is the offset or backspacing on your 15" wheels? It sounds like they are 0 offset? If they had a +10-12mm offset or around 4.0" back-spacing you wouldn't have fender clearance problems with either size tire. What is the actual tread width and section width of the 15" tires vs the 16" you used to have? The taller 225/60-15's are probably a bit narrower thatn the 225/50-16's so they may not have a problem. A 225/50-15 will certainly move the tire further from the lip and reduce the possibility of rubbing. What's amazing to me is that you're running the 12.2" rotors with 15" rims? Wow! Quote Link to comment Share on other sites More sharing options...
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