Spacers for Prostars

[Phx99Cobra]

I was wondering if anyone had spacers or were to get them so I could put my skinnies on my car. Also Would I have to get extended studs. I wasnt sure since the lug nuts on the prostars go into the wheels.

[Ethan@S3M]

http://www.highperformancestangs.com/forums/showthread.php?t=3939

[BurnTire]

I have the Baer 1" slip on spacers. Yes you will need the longer studs.

[AZSonicSnake]

ok, so jeff, where did you find lugs long enough? i have 3" studs, and uh...no dice.

[BurnTire]

ok, so jeff, where did you find lugs long enough? i have 3" studs, and uh...no dice.

I havn't put them on yet, but I have the 3.5 ARP studs with the Pro Star Lugs. I will let you know how it works when I get around to it. The Lugs are real long.

[AZSonicSnake]

could you send me the part number and what not...i might switch to those...

[BurnTire]

BAER
2000014
1.0 Billet Spacer 5 x 4.25 x 4.5
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_759919_-1_11611

Weld Lug Nuts
1.310'' long x .687'' dia. Shank Lug Nuts
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_749583_-1_11611
I have the open end ones.
927-601-1426

I did a little research on the studs. Looks like Baer makes a set that fits the front without any drilling of the stud holes.
http://www.baer.com/buy/catalog/files/accessories.pdf

If you already have them drilled then I believe you would need standard ARP studs.
Press-In .625" Knurl Wheel Studs.
http://www.arp-bolts.com/Catalog/Catalog.html

After reading all this stuff I am ready to put GT brakes on the front.

[BurnTire]

Tony I am doing a little more research on this.

Do your studs protrude past the end of the wheel?

[AZSonicSnake]

er, maybe by 1/8 inch. my problem is the amount of the stud that sticks through the lug. only comes up to the bottom of the nut. bascially it fills the shank with nothing actually coming through the nut..

[BurnTire]

I just did a test fit and see the same thing.

I posted a question of MF about it. I know people run this setup, but I don't feel it is safe unless the stud protrudes into the nut section a distance equal to the diameter of the stud. That is the NHRA rule.

Do you have the open end lugs?

[AZSonicSnake]

yes i do. though they have been modded to pass tech, since i was told that the lug must be half way through the nut.

i am very intrested to hear the outcome of that thread. this has been something that has been a great concern to me since i had a lug break while torquein them.

[BurnTire]

I have a strange feeling that people are running them on the shanks.

How did you modify them?

[BurnTire]

Looks like most people are running them this way. I know this will not get past firebird tech.

[TRUUBLE]

I just cut the "horseshoes" off my calipers and don't need spacers with mine. From what I can tell, the horseshoes don't really do anything. :woot2:

Mine are Telstars . . but I think they are the same as far as clearance.

[Ruckus46gt]

if you run gt brakes up front you need to run a 7/16's spacer. Its better to do open ended lugs if your know your legal. If your not then run closed and hope they dont ask you to pull one off to check depth. the rule is 1/2 the shank must catch the stud. As said do arp 3.5's they are better then any of the 3"s your find(quality wise and easy of putthing the shank lugs on

[BurnTire]

if you run gt brakes up front you need to run a 7/16's spacer. Its better to do open ended lugs if your know your legal. If your not then run closed and hope they dont ask you to pull one off to check depth. the rule is 1/2 the shank must catch the stud. As said do arp 3.5's they are better then any of the 3"s your find(quality wise and easy of putthing the shank lugs on

The rule is the thread engagement in the lug must equal the diameter of the stud. So I need the threads to engage the nut portion of the lug with a distance equal to the diameter of the stud. The long shank engagement means nothing.

[BurnTire]

I just cut the "horseshoes" off my calipers and don't need spacers with mine. From what I can tell, the horseshoes don't really do anything. :woot2:

Mine are Telstars . . but I think they are the same as far as clearance.

The cobra rotors are larger than the GTs so that is the problem.

I don't want to cut things being this is still a street car.

[Ruckus46gt]

The cobra rotors are larger than the GTs so that is the problem.

I don't want to cut things being this is still a street car.
why not just grind the calipers. You can use a small spacer and grind the calipers a little bit. If you take a lot off you have to worry about cracking but dont have to take a super lot of and plenty of people have done it.

[BurnTire]

why not just grind the calipers. You can use a small spacer and grind the calipers a little bit. If you take a lot off you have to worry about cracking but dont have to take a super lot of and plenty of people have done it.

That is an option. I just hate doing stuff like that. Realistically I need over 1/2 of an inch to get the thread engagement.

I know many people are running the wheels on the shank engagement only, but from a safety standpoint I want the studs contacting the threads under the bolt section. If 999 cars can do it and 1 car looses a wheel at 130 MPH odds are I will be that car with some of the luck I have.

[Ruckus46gt]

grind the caliper and run a 1/2" or 7/16's space. I org used a 7/16's mr gasket spacer with stock studs on my gt for many many passes then towards the end went to arp 3.5's when i got my 1/2 inch hubcentric spacer(was going to race legal, but before that never had any issues with tech but nobody made me remove the lugs either)

[AZSonicSnake]

i think the 3.5 stud would work though. from the looks of things on my car if i had the extra .5 i would be perfect. i only have the 3's right now...

[BurnTire]

i think the 3.5 stud would work though. from the looks of things on my car if i had the extra .5 i would be perfect. i only have the 3's right now...

Do you have the ARPs?

the last 1/2" or so is not threaded.

I test fitted the stuff with the ARP's and I don't like what I see.

I am getting tired of this crap. Maybe I will give bogart a call.

[AZSonicSnake]

no i do not. i am not sure exactly what stud i have, but i measured 2.5" last time i had the wheel off. so that means i only have the 3" ones since .5" is in the hub. the last 1/2 or so on the ones i have has no thread. this is part of my concern. i know if i get .5" longer atleast there will be more thread in the nut...

[BurnTire]

My stud measures 3.5 end to end and it still is not long enough.

What size are your spacers?

[AZSonicSnake]

3/4"

[AZSonicSnake]

went and shot a few pics...

here is the spacer...

http://www.msprotege.com/members/AzMz6/cobra%20stud%20issue/yikes%20008%20(Medium).jpg

http://www.msprotege.com/members/AzMz6/cobra%20stud%20issue/yikes%20007%20(Medium).jpg

and this shows pretty dang well how far the stud actually goes through. right where the shank is broken is about where the threads on the stud stopped. there was only the unthreaded part of the stud showing when the breakage happen.

http://www.msprotege.com/members/AzMz6/cobra%20stud%20issue/yikes%20005%20(Medium).jpg

[93mustank]

Good thread.....Another question is......When all said and done with the spacer and the extended studs.....How do you run your regular street bullets with the same lugnuts it cam with for the wheel.... Where do you find open ended lug nuts that style? I think they are accorn type......

[BurnTire]

Do you still have the stock calipers Tony?

I see you have a 3/4" spacer. I have a 1".

What is the distance of the remaining broken shank on the nut side?

[AZSonicSnake]

yes, i have the stock cobra calipers. i put the 10th anniversary calipers on, and with a fresh pad, they would not fit. i had to take the brake pads to a belt sander and remove about 1/4 of the pad so that the caliper would not hit the wheel. even then it rubbed a little but just enough to remove the red paint on the out tip of the caliper.

[AZSonicSnake]

Good thread.....Another question is......When all said and done with the spacer and the extended studs.....How do you run your regular street bullets with the same lugnuts it cam with for the wheel.... Where do you find open ended lug nuts that style? I think they are accorn type......

honestly i had some of the open ended lugs left from my 98 gt and use them on my stock wheels. just had a little stud sticking out of the lug hole.

[BurnTire]

Thats a new one grind the pads. LOL

[AZSonicSnake]

it worked. took two trips to the shop to get the perfect, but with how easy the pads come off the cobra calipers, it was no biggie.

[Phx99Cobra]

What about the open ended lugs that 93mustank asked about. My wheels are chrome. Tony do you no If they make open lugs in all chrome.

[Black96SVT]

I have 15x3.5 up front (cant remember back space) with a 1" hubcentric spacer and am fine
for the rear for 15x10 w/ 6.5" back space I have i believe .5" spacer, ground caliper face, ground banjo bolt and im fine haha

[Black96SVT]

What about the open ended lugs that 93mustank asked about. My wheels are chrome. Tony do you no If they make open lugs in all chrome.
Mine are chrome, open ended SST Mags
http://store.summitracing.com/egnsearch.asp?N=700+4294923107+4294922919+42949190 65+4294900339+4294900366+4294902778+115+4294906436
theres a link to summit for chrome shake lug nuts, for 1.5"-20 RH studs

[BurnTire]

I have 15x3.5 up front (cant remember back space) with a 1" hubcentric spacer and am fine
for the rear for 15x10 w/ 6.5" back space I have i believe .5" spacer, ground caliper face, ground banjo bolt and im fine haha

Does you car have the big 13" rotors like an 04?

[Black96SVT]

Does you car have the big 13" rotors like an 04?
yeah all 96+ Cobra's have the 13"

[BurnTire]

Do your studs on the front protrude past the lug end?

[Black96SVT]

the lugs on the spacer or on the car?

[BurnTire]

Ah you have the bolt on ones.

The lugs on the spacer.

I have a 1 inch slip on spacer.

[Black96SVT]

Ah you have the bolt on ones.

The lugs on the spacer.

I have a 1 inch slip on spacer.
yeah i got the hubcentric spacers so i wouldnt have to get the longer studs
the studs on the car to the spacer are perfect distance that done hit the rim and then the studs on to the rim sit flush I believe with the rim, the dont come out from what I can remember. I test fit them during the summer so if you wanted I could take a look in the morning

[BurnTire]

That is the problem. The threaded portion of the stud must protrude a distance equal to the diameter of the stud in the lug nut portion. (In english the nut portion must have stud threads engaged). The shank portion of the lug does not comply with the rule.

The problem is the track I go to the most checks every lug at tech.

[Black96SVT]

That is the problem. The threaded portion of the stud must protrude a distance equal to the diameter of the stud in the lug nut portion. (In english the nut portion must have stud threads engaged). The shank portion of the lug does not comply with the rule.

The problem is the track I go to the most checks every lug at tech.
ah crap, hopefully I dont have a picky track, that or Ill be buying longer studs once I am in FL haha

[AZSonicSnake]

i'll be honest, a bolt on spacer makes me far more nervous than the current setup that i run. and the setup i am running makes me a tad on the nervous side....

[BurnTire]

I think I am going to take the Bogart solution. I didn't use the wheels so they can go back to Jegs.

[BurnTire]

Tony I did some measuring. With a 3/4" spacer and the long ARP studs you will have 1/4" thread engagement in the nut. The studs are 1/2" in diameter so this is 50% legal. LOL

Looks like a 1/2" spacer is what is needed to be legal.

[AZSonicSnake]

i'd be content with that....:twothumbsup:

[BurnTire]

I am sure firebird would have an issue.

[AZSonicSnake]

meh. there are ways around that....one would be going to speedworld. :laughing:

[BurnTire]

NHRA Stud, Lug Rule

[03cobrazzz]

NHRA Stud, Lug Ruleget gt rotors and calippers and the problem is solved it doesent brake that good with the skinnies any how and you can get slotted and drilled rotors with a good pad to compensate.:biglaugh:i will go with gt drilled and slotted rotors in the rear with some hawk drag pads for my warping issiue on the rear rortors.

[Dan]

Tony I did some measuring. With a 3/4" spacer and the long ARP studs you will have 1/4" thread engagement in the nut. The studs are 1/2" in diameter so this is 50% legal. LOL

Looks like a 1/2" spacer is what is needed to be legal.

too nbad that with the 1/2 in spacer most wheels will still hit the bobra brake system. I have and always will use the 3/4 spacer even bogart uses the same spacer the only diffrence is they are welded to the wheel

[BurnTire]

too nbad that with the 1/2 in spacer most wheels will still hit the bobra brake system. I have and always will use the 3/4 spacer even bogart uses the same spacer the only diffrence is they are welded to the wheel

The bogarts don't require the studs to go thru a bunch of the wheel like prostars. I wish weld had a thinner center section on the wheel.

[Ethan@S3M]

1" hubcentric spacers with ARP studs. You can see that the studs come out past the end of the shank.

http://inlinethumb64.webshots.com/31295/2816529460080028787S600x600Q85.jpg (http://good-times.webshots.com/photo/2816529460080028787nGxSdA)

Click on pic and then click on view full size on the upper right hand side.

[Ethan@S3M]

http://image50.webshots.com/650/5/29/46/2816529460080028787nGxSdA_fs.jpg

[BurnTire]

I just ordered a set of those bolt on spacers. I am going to knock the studs out and put ARPs in them.

[Ethan@S3M]

I just ordered a set of those bolt on spacers. I am going to knock the studs out and put ARPs in them.

Told ya I have a couple set in the garage.

[BurnTire]

Do you know what the knurl size is on the ARP's or did you have to drill the holes out some?

[Ethan@S3M]

I believe it was .625, Im not sure its been a while.

[Ethan@S3M]

They were 3.5in Arp studs and I bought them from Loper's. Or Bear has them locally for about 5 bucks apiece and they are local as well.

[fourvalvegt]

if you want the 3.5 inch studs its a .625 knurl they can be found at summit for 12.95 for a set of 5 http://store.summitracing.com/partdetail.asp?part=ARP-100-7703

and you need a 39/64 drill bit