Spacers for track car. What's max for rear and front?

[Madea]

Hello everyone,

So first of all I have to tell that I have spacers about 18mm in front and back. Someone test bigger spacers for more grip and can tell what's the max for front and rear ? And wchich is the best size for track? I was thinking that's when it will be wider it will have more grip - am I right? I have small angles on my wheels.

Greetings.

 

[Bobby.]

25mm up front and 15mm on rear is the normal sort of width people run.

 

[Madea]

I need some extreme spacers for track. I can remove wheel house shell ( I dont know if its correct word) and make it bigger by the wider body kit.
I need someone who is having rly big spacers and sports driving to tell me what is the line where I can go.

 

[Bobby.]

Look through some of the racers project threads, your find no one really goes past 30mm, it's not all about having a wide track.

 

[AlexW]

NorthloopCup

 

[bozothenutter]

won't spacers f*ck up the scrub radius?
will make is 'hunt' on braking, tramline and such?

 

[Madea]

I dont think so. K-tec is selling 19 mm spacers and its safety.
I was thinking about bigger spacers about 30mm rear and 25mm in front. I can make it but I dont know how the will be driving on track.
And I wrote here cuz I was thinking someone was testing wider spacers setup.

 

[Addicted]

I'd just stick with what people normally go for, there are reasons they're a popular size!

Unless of course you want to be constantly changing wheel bearings?

 

[bozothenutter]

basically moving the wheels out will increase the leverage on the upright
Think about this, you are increasing the distance to the bottom balljoint, in effect creating a longer lever (arm) increasing torque trying to turn the upright.
add to this braking force and you can see why the effect would be under braking and on uneven surfaces.

not saying it is dangerous, just an effect to keep in mind.

 

[NorthloopCup]

won't spacers f*ck up the scrub radius?
will make is 'hunt' on braking, tramline and such?

Correct! 15mm up front is the maximum you can go without toatally ruining the scrub geo but that's on standard offset rims of around ET45 (ish). You'll get better handling from roll centre/bump steer corrections, as we've found and proven.

You'll get away with spacing the rears further, but i'd use the stub axle spacers instead of the hubcentric style.

 

[Martin.]

Correct! 15mm up front is the maximum you can go without toatally ruining the scrub geo but that's on standard offset rims of around ET45 (ish). You'll get better handling from roll centre/bump steer corrections, as we've found and proven.

You'll get away with spacing the rears further, but i'd use the stub axle spacers instead of the hubcentric style.

I like this post.

 

[rdoxenham]

+1 on NorthloopCup

I run 20mm on the front, and it's too wide. I need to reduce this to 15mm to stop it from scrubbing when cornering really hard, although I suspect I could fix that with stiffer springs. That's on ET43 2118's.

On the back I run 15mm with no problems, that's with cambered stub axel spacers.

 

[seabass859]

+1 on @NorthloopCup

I run 20mm on the front, and it's too wide. I need to reduce this to 15mm to stop it from scrubbing when cornering really hard, although I suspect I could fix that with stiffer springs. That's on ET43 2118's.

On the back I run 15mm with no problems, that's with cambered stub axel spacers.

what camber do you run on the rear???

 

[rdoxenham]

what camber do you run on the rear???

Not had it measured accurately, but would expect -2ish.

 

[scooby-93]

NorthloopCup would you say 20mm bolt to hub spacers on the front would be ok on track without up setting things? My 15" wheels are et37 and inthink I'd need the 20mm to clear the brembo 4pots off a megane which I plan on fitting

 

[rdoxenham]

@NorthloopCup would you say 20mm bolt to hub spacers on the front would be ok on track without up setting things? My 15" wheels are et37 and inthink I'd need the 20mm to clear the brembo 4pots off a megane which I plan on fitting

At ET37 I would be careful... as I said, I am at ET43 with 20mm and mine rub on the track. Then again, I could stiffen things up and may be fine, but I wouldn't go ANOTHER 6mm out.

 

[scooby-93]

Slightly confused here, et37 means the wheel would stick out less than et43? Or am
I wrong?

 

[NorthloopCup]

Slightly confused here, et37 means the wheel would stick out less than et43? Or am
I wrong?

Et37 will stick out further than et43 mate. On et37 I'd go no wider than 12mm tbh. It's all personal preference though.

 

[Bobby.]

Slightly confused here, et37 means the wheel would stick out less than et43? Or am
I wrong?

Yeah your wrong, the lower the number the wider the track.

 

[scooby-93]

Ok cheers for that, just bought some brembos from a megane 230 so just need to be able to clear those, so would 10mm do it or would I need to go bigger? Going to have the camber set At either -2 or 2.5 degrees? Thanks

 

[NorthloopCup]

Ok cheers for that, just bought some brembos from a megane 230 so just need to be able to clear those, so would 10mm do it or would I need to go bigger? Going to have the camber set At either -2 or 2.5 degrees? Thanks

I'm afraid I can't answer that question regards the brembos and spacers. Ph1 Tom will be able to though as he will be running this setup soon.
If it's a track car aim for 2.5-3 degrees negative. If it's road and some track 2-2.5. 10-15 minutes of toe out will do the trick as well.

 

[scooby-93]

Thanks mate [emoji106]

 

[bozothenutter]

Ok cheers for that, just bought some brembos from a megane 230 so just need to be able to clear those, so would 10mm do it or would I need to go bigger? Going to have the camber set At either -2 or 2.5 degrees? Thanks

i run brembo's with ET37 wheels and 10mm spacers (wheels are 16in) i want to see if i can go with a 5 or 6 mm spacer

 

[scooby-93]

Thanks for that mate, hopefully 10mm will do me

 

[Ph1 Tom]

Depends on the wheel. A Team Dynamics Pro Race 1.2 needs ET30 on a 15" to clear 280mm discs and IIRC it needs ET40 or 35 on a 16" wheel to clear 300mm discs.

A Pro Race 3 needs less offset as they have more brake clearance.

What wheels do you have? scooby-93

 

[scooby-93]

They are 15" oz super t gt et 37 6.5j

 

[Mar172]

Depends on the wheel. A Team Dynamics Pro Race 1.2 needs ET30 on a 15" to clear 280mm discs and IIRC it needs ET40 or 35 on a 16" wheel to clear 300mm discs.

A Pro Race 3 needs less offset as they have more brake clearance.

What wheels do you have? @scooby-93

What size pro racers do you have on your car tom

 

[bozothenutter]

Depends on the wheel. A Team Dynamics Pro Race 1.2 needs ET30 on a 15" to clear 280mm discs and IIRC it needs ET40 or 35 on a 16" wheel to clear 300mm discs.

A Pro Race 3 needs less offset as they have more brake clearance.

What wheels do you have? scooby-93

Are we talking spoke clearance or circumference?

 

[Ph1 Tom]

What size pro racers do you have on your car tom

15" Et35 pro race 1.2. I've got 10mm spacers but I'm going to reduce them to 5mm

 

[Madea]

For my track car I have made spacers like that:

Tomorrow I will make a photo of my wheel and the angle of it. And I will be very pleased if you would tell me if I should make bigger angle or not.
And what about the suspension, what you think should go lower or up or stay like that.
And the last question, I am running the Toyo r888 15/195/50 and what tension should I run on track when 1 lap I have about 2 minuts and its quite lots of bending in the middle and long straight at the end of it... I was thinking to run 1.6 rear and 1.4 in front. What you think?

Cheers mate and see you tomorrow.

 

[Ph1 Tom]

Are we talking spoke clearance or circumference?

Spoke clearance. Circumference is limited to 15" and 280mm discs and 16" and 300mm discs unless you make your own brackets.

 

[scooby-93]

15" Et35 pro race 1.2. I've got 10mm spacers but I'm going to reduce them to 5mm

So do you think 10mm will be enough clearance on mine or 15 just to be on the safe side?

 

[ad_182_uk]

What if your really low? Whats the widest you can go on the front? Do they do 12mm hubcentrics anywhere with longer bolts or that bolt to hub?
Also whats the centre bore / stud diameter and amount on the clio 182? (Clio noob here)

 

[Ph1 Tom]

I'd imagine 10mm would be plenty with super ts

 

[Ph1 Tom]

What if your really low? Whats the widest you can go on the front? Do they do 12mm hubcentrics anywhere with longer bolts or that bolt to hub?
Also whats the centre bore / stud diameter and amount on the clio 182? (Clio noob here)

12mm will be fine on the standard wheels.

60.1mm and 4x100

 

[ad_182_uk]

12mm will be fine on the standard wheels.

60.1mm and 4x100

cheers man. Any idea where i cam aquire such spacers? Tried egay with no luck

 

[Ph1 Tom]

cheers man. Any idea where i cam aquire such spacers? Tried egay with no luck

Your searching skills are weak!

http://pages.ebay.com/link/?nav=item.view&id=170742971646

Depending on what offset wheels you have you might be better off getting some bolt to hub 15/16mm spacers

 

[bozothenutter]

So do you think 10mm will be enough clearance on mine or 15 just to be on the safe side?

Mock up the caliper (without removing the old)
Get some washers and start experimenting.
Easier with a stud conversion

 

[ad_182_uk]

Your searching skills are weak!

http://pages.ebay.com/link/?nav=item.view&id=170742971646

Depending on what offset wheels you have you might be better off getting some bolt to hub 15/16mm spacers

ive got the standard alloys (not sure on offset) do they do 12mm bolt to hub then? Also what bolts will i need flat or tapered? :s

 

[Madea]

As NorthloopCup said, about the angles for track car its good to be 2,5 - 3 negative the handling on track is pretty much better. I have normal angles in 1st oes and the next I had the angle about 2,5 negative and the times was better about 2-3 sec on lap. U can go much faster and u have much more grip in corners than on standard angles.