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315'S on an E39

10K views 24 replies 16 participants last post by  357i 
#1 ·
Disclaimer: Don't do this to your car. If you think it's a good idea, you're wrong.

This has been made possible by a huge amount of fender rolling/pulling, fender liner removal, rear strut spacing, gas fill hose modification and Thayer Motorsports adjustable rear control arms. For me, this was a "mandatory" modification. With 650tq at the tire and a 3.64 rear gear, this car was good for 70+ mph rolling burnouts.

Step one was wheel selection. I like my MPar reps.... Did some measuring and decided to have the wheels cut, widened and welded. They are now 18"x11".



Next was tire choice. Went back and forth on the NT01 and the R888. Finally went for the NT01 315/30/18.





Have to run some spacing on the rear, but nothing big. Rolled the fenders, then rolled them some more.









Rear camber is currently set between -.7 and -.9 so no loss of contact patch. I'll need to put some load on the suspension to see if the fenders need to be rolled more. For the record, when I say "rolled fenders" I'm not talking about that VW bacon fender job, this is tastefully done and still "stock" appearing.

 
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#9 ·
Mostly the top of the arch and the front. They are well massaged. I had a set of Brandons wheels on the back with 275's the other day and I could fit my entire hand between the fender and the tire.

Those are some sick tires, what fronts are you running?
Fronts are 275's on 9.5" MPar reps.

Awesome.

Mind telling us what mods you did to the drivetrain to handle that power and what system/boost you run?
Built LS1/6speed with 78mm turbo at 15-17psi(635whp/650tq)
Modified M5 driveshaft
Thayer Motorsports built 210mm diff with 3.64 gears and a 4 clutch upgrade
Stock M5 axles
Reinforced rear subframe with Powerflex bushings
Thayer Motorsports adjustable rear control arms
 
#4 ·
Looking good. Imagine the traction :eek:
Traction, what is this traction of which you speak? I did not know that one could even have traction with even sized wheels. :hihi:
 
#6 ·
Those are some sick tires, what fronts are you running?
 
#11 ·
Seen this car in person. One word = MONSTER
 
#14 ·
How many spare barrels did you use for the widening? I'm wanting to go a bit wider on my style 65s and couldn't find any wheels guys locally that'll take the work.
 
#16 ·
Those stock half shafts are probably the weak link now. I have grenaded a CV joint with drag radials on my F10.
 
#20 ·
Do you mean the NT-01s like the OP is using? My experience is that NT-01s run true to size, and their tread to sidewall profile is tapered like typical tires.
 
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