I really want Prostars, but don't want to have to grind my calipers much. I looked into Bogarts, but they're styles don't really appeal to me. Are there any different calipers that we can use to clear the wheels without grinding. If not, how much work was involved with the grinding? Thanks.

PS. These heavy ZR1s are history. Ha!

 

Ususally for the 15x3½ fronts you can run a 5/16" spacer and not need to grind at all. If you do need to, it won't be much.
For 15x8 rears, to clearance the rear calipers for running without a spacer takes alot of grinding. Grind until you get sick of it, then grind some more. Then grind some more. Then grind till you never want to see a grinder ever again in your life. Then grind some more. Grind, test fit, repeat till it's clear...
And for 15x10s it's worse!

 

that look just like if not better than prostars.

 

Damn, I didn't think it was that bad. Well, that can't be good for brake cooling either. I think I'll just lean toward the Bogies. Hey, quick question, if the RR10s are 15lbs, and the P1s are 10, do you think the gains of going to a 15" P1 is worth the look of a "Race car" or would the RR10s be a nice step up from my current 23lb ZR1s? Thanks.

 

So then Bogart wheels will fit over stock calipers on a SS Camaro?

 

man if you have teh scratch to buy bogarts do it..i've done a few sets of rear calipers to clear 15X10's and man i'd rather kick myself in the nuts that do another set at this point

 

We designed the Bogart rims to be a direct fitment...very few guys running stock parts may have to touch up a caliper or two...nothing major at all. A hand file can be used for the most part.

Aftermarket brake parts in generally are "beefier" so additional clearancing may be needed...this is due to the calipers floating. (not including drag brakes...those make it easier to fit 15inch rims...not to mention we can design the rims so they have even less mass to them:-))

Dear john,

The RR rims depending on your sizing will vary in weight...this weight difference plays a large part into hp losses...BUT if your wanting them for road course racing...you need more strength.

You need to figure out what your goals will be for the rims...to give you an idea..a similar sized rear RR rim will be ~17-18 lbs(generous number)...this is obviously lighter then your current rear. Is there going to be gains...well yes..but if your wanting the gains for drag racing, then obviously, the drag rims are you best choice by far...to give you a number off the top of my head...you could see .1 seconds more with a drag setup over the RR setup. You will also see better traction less rotating weight resulting in better times.

Weight alone is not the only factor...the smaller the diameter, the closer the mass is to the center of rotation, there will be a lower rotational loss. Not to mention when the rim is smaller, the tire (maintaining similar overall diameters) has additional sidewall flex to "bite" the ground.

Once again though, you need to look at what your sole purpose of the rims will be...this really is the determining factor of rim choices.

I can make up a variety of P1 bolted designs (over the welded P1s) not listed on our page if someone is interested in a little different look...

If anyone additional questions, feel free to e-mail me directly at sjmmanufacturing@verizon.net.

Steve
President
SJM Mfg, Inc.

 

I did some grinding today to fit some 15x8 prostars. It took about an hour per caliper with a drill and a drum sander. I'm running 5/16" spacers and longer studs though.

 

15X8's are alot less work than 15X10's, period. to get 15X10's on the car without a spacer or with just a baby one you're looking at spending most of a day with a bench grinder

 

I've got Wilwood lightweight drag brakes on the rear and am in the process of putting 15x10 Prostars on. The test fit looks like they'll clear easily.

 

When you go to the drag brakes, it is very easy to fit drag rims as the calper/brakes are made to fit them....

When I spec a set of rims to drag caliper specs, they fit easily...they end up being VERY light...you'll have a bunch of more choices. We can make a front runner ~7 lbs for example:-).

If you can afford it, or don't mind running them, drag brakes are always the best choice:-). I mention it to guys all the time whom are considering drag brakes in the near future and want to purchase Bogarts...we can make them lighter and save a few bucks for the customer in the end. Of course, they would only work with drag brakes though.

Steve


Steve