Help! 308 to 348 wheel conversion...?

Because the fronts are the same, you shouldn't notice anything. There will be some forces on the rear suspension that are different, but they go into the frame, you'll never know they eare there. I think it will feel exactly the same as it does now.

Why don't you plan to come and feel it out properly??

http://ferrarichat.com/forum/showthread.php?t=12342

 

Mark, when is that? I could not find a date. The car is going under the knife again this weekend, and will be in at least 3 weeks as the CF interior needs to be made and installed. I am guessing I will not see that car again until the end of April everything is working on schedule...

That said, I am worried that the rear forces might prove too excessive and cause cracks etc..

 

It's May 15, Here's the original thread
http://ferrarichat.com/forum/showthread.php?t=12333

You'll be fine, put your mind at ease, nothing is going to crack/bend/flex because of your wheel change. You may see rear wheel bearing or a-arm bushings only last 80k miles instead of 100k, but that's about it. The wheels on the rear of my car are 32mm offset instead of the stock 11 and are mounted with no spacer, so the centerline is moved inboad 21mm (the wheels are 2.5" wider than stock, so the face of the wheel is actually moved out 10mm from stock). Anyway, there hasn't been any sign of a problem.

 

Mark, the difference is if the car came with 348 wheels or the same offset as 348 wheels, the positioning of the hubs would be further out by using a different hub/contol arm arrangement to keep scrub down. I dont think anything will fail either but there is a reason why cars dont come from the factory with big honkin spacers on the fron hubs and its all to do with handling. Does a 348 have a spacer or is the rotor and hub face close to the rim? The rear wouldnt concern me at all.

 

why would anyone want to do this ?
aren't the 348 wheels heavier than sh!^

 

They are heavier than any 308 factory rim.

 

With all the talk about 308 wheels, has anyone considered using 15" rims from a 400? They look deep, probably plenty available and inexpensive.

 

I appreciate all of the posts guys. The fact is, I have spoken extensively with Wolfgang (his old 308 is pictured on the first page of this thread with the same mods) and also with a gentlemen whom I trust as far as the 'engineering' of F-cars is concerned and both agree with what Bert has already stated. The one drawback to the wheels is that they are heavy, but as this car is not intended to be on the track anytime soon, that is a moot point.

For Joe: It's a matter of personal taste, but in person, the 348 wheels look fabulous on the 308. I wanted 'Ferrari' wheels on my car, not 'aftermarkets' and these look great.

 

Well, it's finally complete! After 3 sets of spacers for the rears the machine shop finally got it right! I snapped these on the way out this morning. I will post more later.
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I cant remeber what they look like?

 

I forgot to mention that the car handles very well. I was concerned after some of the posts that I read here, but now I'm convinced that more rubber on the ground is not a bad thing!

 

Awesome, congrads!!

 

(I don't mean this as a backhanded comlpliment...)
Those wheels look better than I thought they would. I didn't like the wheels on the other car pictured earlier, but it's nice on yours!

Since people reading this are thinking about bigger wheels on 308s, can anyone tell me how wide of a wheel can be packaged? 8.5F, 10R? Any chance without moving shock mounts like someone mentioned? If anyone can give me a go/no go that'll be cool, otherwise I'll post once I've completed a comprehensive search for the info. Thanks!

 

i would sure like to know about this!!!! anyone have any ideas??? were the 400 wheels knockoff style or did they have lug nuts,???? i dont remember!!! ill look around and see if i can find any info......... my 308 has 14 and 16 in wheels with it....... but i am always open to more options!

 

As far as I know 9.5+ is a bit much, but can be compensated for slightly w/ spacers.

 

They look real sweet! I'm with you on the "Ferrari" wheels on a Ferrari idea. Aura went with the same idea as well.

Dave
BTW, I like the standard Ferrari-issue under car cardboard. I ordered the same option myself! (Stupid oil, always leaking out....) LOL!

 

I have always preferred the look of the 16" QV wheels on a 308 but I think those 348 wheels look really good!! Way to go!
Birdman

 

The front is no problem, I have 8.5, but 9 or 9.5 would go if you wanted them. In back, it depends on your springs. The stock springs are about a 3.5" ID if I recall and come pretty close to an 8" wheel, but you hsould be able get an 8.5" on ro maybe a 9, but it would be very tight. With 2.5" ID springs, I had 9" on my car and there was still a little room to work with, so 9.5" should go. They do Make 2.25" ID springs, that might get you a 10"...I have seen 360 wheels on 308s which are 10s, but the tires might be rubbing the fender too....

 

Looking for help. Hope I can use this thread without stepping on toes. Just R/R wheels & Tires in drive way. Its dark now. Not a good day. Ordered and received Axis seven mods 19X8 5/108. 235-35-19 p-zero front and 255-30-19 rear to replace stock 17's.

Car will not move in forward or reverse. Shut things down and had a beer. Will f/u am to check. Jacked up rear end disengaged hand brake and gear. Rear wheels will not move. All clearances front and rear good. All studs same size, no spacers and offsets visually appear same as stock. Removed aluminium alignment pins to install wheels. Is this a no no or tell me these need to be on the car. Wheels interfere with these pins otherwise. Suppos
ed this combination has worked well in other applications. Former 328 guy now 360 guy says so.

What did I do? First time owner and new to chat. Any help appreciated. Maybe pulling trigger too soon. Have troubleshooting skills but not on F cars. However I need something to sleep on. Want to be optimistic for a Sat in the Garage. Thanks!

 

19s will leave you with too little rubber to work. 18s already have next to none. 19s will not work on US streets.

Also, stock is 16 not 17.

If you are serious, I can check your tires.

 

Dave B. -- Are you sure it isn't just a lugbolt length issue. I know 328 use the same length stock lugbolt front and rear, but perhaps at the rear it's a more critical situation so if your aftermarket lugbolts protrude a bit further than stock it may be still OK at the front, but a problem at the rear -- just a thought as something to check/verify...

 

Thanks I'll check that. reminds me that tightening seemed a little strange. Will back them off and re-check.

 

Not sure that I completly understand your reply concerning too little rubber. Overall diameter visually is the same vs stock. Are you talking profile? I meant 16's stock, not 17's sorry! Little flustered I suppose. Maybe thinking of the dually.

 

Sounds like the bolts....I remember having the rear bolts hit on one of the wheel sets I tried. A few minutes on the bench grinder fixed it. As I recall they hit the bolts that holt the axle bearings in.

 

Sorry it was a bit pre-occupied yesterday. Looking at my wheels, with almost no rubber on them and they being 'merely' 18s, I cannot imagine what 19 would be like...