Garyzworld

I installed a set of Forgiato wheels yesterday and now the check engine light and ABS lights are on. Is it because I didnt install the wheel sensors in the new wheels?

okbarnett

does the tire pressures work

Garyzworld

No speedometer, no odometer, check engine light on, ABS light on, running in limp mode. Didnt check the tire pressure.

okbarnett

You got big trouble, I dont think the wheels did it

m-svt-amg

check electrical connections.

Tommyboy928

charge trunk batteri !!

Garyzworld

The car stay on a battery tender so it's fully charged. So you guys are installing aftermarket wheels and not putting the factory wheel sensors on the new wheels?

Garyzworld

I forgot to add a very important piece of info... These wheels are
20 X 9 in front and 22 X 11 in the rear. I used to run them on an '03 SL 500 without issues. This car is an '03 SL55 and I'm wondering if this cars' electronics won't allow me to run the staggered height setup... I haven't lowered the front yet so pardon the gap lol.

Garyzworld

I think that I figured out my problem. After speaking to a Mercedes tech guy I was told that you can get away with running staggered heights as long as you are within 3-4% rolling circumference on front and rear. When I had this setup on my SL500 in the past I had 245/35-20 in front and 295/25-22 in rear which was a 3.8% difference so everything was fine. This time on the SL55 I opted for the 255/30-20's up front with the 295/25-22's in the rear which is a 6.4% difference. The car doesn't like it and is throwing an ABC code. I will just go back with a taller front set of tires (245/35) and my issue should be over.

Tommyboy928

what you was thinking putting 22 inch wheels on car like this?? mexican village style or ?

way to big , 20 inch is more than enought

Garyzworld

I thrive off of guys that think like you Tommy and I'm not salty with you for voicing your opinion... There is plenty of room in the world for conservative types but that's not gonna do it for me. Sure, I could have bolted up a regular set of 20's and called it a day but I'm a game changer, not a follower. I seek extreme performance and I usually wind up with it. Get your popcorn man... This 55 is gonna be one to remember.

m-svt-amg

Typically performance suffers with larger wheels. Unsprunf weight and such...

but maybe itll help with the traction issue off the line?

And from experience youd likely want more sidewall on your front tire. My 20 inch wheels used to bend all the time running 255/30/20 and 305/25/20 tires. I ended up stepping down to 19s.

Tommyboy928

is discussion here

https://mbworld.org/forums/sl55-amg-...series-sl.html

m-svt-amg

id recommend 255/35/20 and 305/25/22 for your wheels (unless it causes fitment issues or you cant find tires)

11 inch wide wheels would really benefit more from a larger contact patch than skinnier tires and extra camber to fit a slammed lowering setup.

Your front wheels will be destroyed by uneven roads with that short of a tire.

This might be outside your 4% margin though before doing a couple burnouts

Garyzworld

I'm gonna run the 245/35-20 because any taller sidewall and it starts to look uneven when you consider how skinny the rear is. As for performance, when you start REALLY making HP the larger wheels bite better in my opinion, although carrying extra wheel weight is never a good thing. Like the 20's on my Supra hook incredibly well for something with 800 ft. lbs of torque and I suspect that this car is nothing different. I know that 22's seem extreme but they really fill in the rear wheel well nicely. I should have gone 21 up front for better tire sidewall matching. Bent wheels is also an issue because I've had these repaired a few times. Big wheels are like the chicks we date with long hair and fake ****... They're hell to deal with but damn they look good!

m-svt-amg

i suspect the increased moment of intertia lowers the torque at the point of contact, helping prevent the car from making enough lateral instantaneous force to exceed friction. i dont doubt it hooked better.

That said, good suspension tuning can get that same traction out of lighter wheels, carrying less weight through turns or the big end of a quarter mile.

I think a 255/35 and a 295/20 would probably suit your setup well. just make sure your toe and camber are right after lowering or youre gonna lose a lot of high speed stability.

Garyzworld

I agree 100% m-svt. Lighter wheels with proper suspension tuning is the best way to go but then there are hard headed guys like me lol... I don't have to worry about lowering the rear because it sits perfect without lowering, therefore the camber is spot on. Now I'm going to need some lowering links to adjust the front down a bit. Do you think that it's a requirement to put the factory sensors in the aftermarket wheels or are guys just going without them?

m-svt-amg

I have factory sensors in my aftermarket wheels, but i dunno if they would have trouble on mismatched sizes...

That said i dont know if lowering just the front will cause abc problems..
please report back once you try it?

Garyzworld

Issue resolved. I installed taller tires on the front and everything is fine. Admins should sticky the following statement: The car will function properly with a 3.8% difference in height between the front and rear wheels but would go into limp mode with a 6.4% difference.

m-svt-amg

So..

More sidewall on your front tire did it?

What size did you go with?

Tommyboy928

think i step down also to 19 and 35 profile,, bending wheels is what happends ,, if not just drive local and know every bridge connection or potholes.

Garyzworld

Yes went from the shorter 255/30-20 to the taller 245/35-20 which was closer in height to my rear 295/25-22.

kustom2k1

Nice color, wheels look good for their size. Where are you going with the car, wide body, diff paint etc. or?

fxrs1955

This

Garyzworld

Doing performance mods only. Ordered the MBH headers... Gonna get ECU/Pulley, 90mm throttle body, ported heads, upgraded supercharger down the road.