TJCTalon said:

Is there any brackets that allow the use of the stock 3000gt rotor? I have a set of brand new cobra rotors for this brake swap but after feeling how heavy they are I feel adding 30+ to rotational weight out weigh(literally) the benifits of the larger brakes.

I have wanted to do this swap for a while but jeez these 13" cobra rotors are huge and heavy

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If you are worried about weight, then you must not really need bigger brakes.

There are two piece cobra rotors, just going to cost you $600 for the pair.

TJCTalon said:

Is there any brackets that allow the use of the stock 3000gt rotor? I have a set of brand new cobra rotors for this brake swap but after feeling how heavy they are I feel adding 30+ to rotational weight out weigh(literally) the benifits of the larger brakes.

I have wanted to do this swap for a while but jeez these 13" cobra rotors are huge and heavy

Click to expand...

Lighter wheels.

Just curious have any of you guys had any clearance issues with the rotors being really close the calipers?? I finally was able to put my kit on from rtmracing and it's a little concerning how close everything is. Any pics or advice would helpful.

Thanks Alex

907dsm said:

Just curious have any of you guys had any clearance issues with the rotors being really close the calipers?? I finally was able to put my kit on from rtmracing and it's a little concerning how close everything is. Any pics or advice would helpful.

Thanks Alex

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What part is "close"? If you mean the rotor is not centered in the fixed caliper, you will need to shim the caliper with washers at the mounting point until you can get it as close to the center as you can. If that's what you're referring to.

jjw205 said:

What part is "close"? If you mean the rotor is not centered in the fixed caliper, you will need to shim the caliper with washers at the mounting point until you can get it as close to the center as you can. If that's what you're referring to.

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I meant my rotors are almost to the point they are rubbing on the insides of the calipers. The rotor to caliper side to side distance is fine just the clearing of the calipers. I hope I made more sense this time around .

907dsm said:

I meant my rotors are almost to the point they are rubbing on the insides of the calipers. The rotor to caliper side to side distance is fine just the clearing of the calipers. I hope I made more sense this time around .

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Mine are extremely close, but they were made from the plans posted on here somewhere. My pads still over hang the top of the rotor maybe 1mm.
If it isn't touching, then it shouldn't be a issue

Great Info and insight on the 3000gt vr-4 calipers. Sorry to bring this back to life...

I'll also in the process of piecing my Big Brake Upgrade and I'm almost done too... My concern is what size rims can clear the calipers and offset... As of now I have Gramlights 57c 17 inch by 7.5 and off set is 35 (i might have to double check on that). I'm crossing my fingers that I don't need spacers for it.

I want to know what others are running for this upgrade as well.

I'm running drag 31 17x9 with a 28mm offset but I have extended wheel studs. I have a lot of room between rims and calipers. I'll try to get some pictures for you.

It's not offset that causes issues with 3000gt brakes. It's how far the spokes arch out in the caliper area.

donniekak said:

It's not offset that causes issues with 3000gt brakes. It's how far the spokes arch out in the caliper area.

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The spokes on my Gram lights are concave, not flat (even) like some.

I have the RTM Kit on my 1g and run the Evo 8 Enkies. The spokes clear the calipers just barely without any sort of spacers, just to give someone an idea.
<a href="http://s15.photobucket.com/user/Piranhaman33/media/Mobile%20Uploads/8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg.html" target="_blank"><img src="http://i15.photobucket.com/albums/a388/Piranhaman33/Mobile%20Uploads/8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg" border="0" alt=" photo 8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg"/></a>

Piranhaman33 said:

I have the RTM Kit on my 1g and run the Evo 8 Enkies. The spokes clear the calipers just barely without any sort of spacers, just to give someone an idea.
<a href="http://s15.photobucket.com/user/Piranhaman33/media/Mobile%20Uploads/8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg.html" target="_blank"><img src="http://i15.photobucket.com/albums/a388/Piranhaman33/Mobile%20Uploads/8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg" border="0" alt=" photo 8614872e-30dc-4349-91a8-8a82b91be2ac_zps7dc14083.jpg"/></a>

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WOW! I guess I have to test fit and find out from there... I'm also running the RTM brackets too.

Just installed my RTM kit.

Yes the pad overhangs the rotor about 1mm, I did test fitting with some off the shelf brand of street pads from my friends shop.

I needed race pads and Porterfield, Carbotech and someone said Hawk ( but I didnt find the race pad for the caliper ) are about it. Carbotech brake company offered to grind down the pad a little. The thinking is you dont want extra heat from it overhanging the rotor once the pad wears down. However we took a lot of measurements and I may be ok with the Carbotech as the pad material is in a slightly different location on the backing plate.

As for wheels, none of my 17 clear the calipers as the spokes hit. I was expecting that. According to RTM the Evo wheels fit. I have just ordered 1 wheel to test fit from a company called Fast Wheels here in Canada. Light and inexpensive. 17*9 et 25. I will report back once I test fit that wheel. The other wheel I can get my hand on to test will be a Team Dynamics 17*9 et 27.

I did a test fit on my car and my rims didn't clear the caliper... looks like i need spacers.

A good general rule of thumb for the 3kgtvr4 calipers and wheel clearance is if it fits a stock evo with brembos then it should work for the dsm.
Garfield (from tuners nation) told me a 17" diameter is a minimum and spoke design is the big concern. This was back a few years ago when I was doing the swap.

Sucks your wheels didn't fit.

You could use something like tire rack to check fit for the next one's. Just select any evo model that came with brembos then narrow your search to either the wheels you own or the one's you want to get.
http://www.tirerack.com/wheels/resu...rt=Diameter&filterNew=All&filterSpecial=false

I was lazy with wheels, I just went with stock evo 8 wheels.

Oh one more thing you can do to "help" get the wheels to fit is to shim the caliper at the caliper bolts to sit in further away from the spokes of the wheel. Then you will have to find a rotor that has the correct specs and hat height to match the rotor.
That is how I ended up with modified 08 lexus gs350 rotors on the front of mine. That and I used the 2g 3kgtvr4 calipers in front so I could have a bigger rotor. 333mm.
Stock 2g vr4 rotor 314mm that you would use for the tuners bracket.

I think the hat height was shorter on the cobra rotors and thats why I didn't go that route.
Yep
cobra hat height 1.714
3kgtvr4 hat height 1.772
The taller hat height puts the caliper farther away from the spokes.

I'll throw out a general rule-of-thumb regarding rim clearance with VR4 calipers.
VR4 calipers sit approx 1.750" more outboard (toward the inner spoke area) and approx 0.750" radially outward from the hub centre than the stock DSM setup.

The wheels from FAST fit with room to spare. 17*9 et 25. But they sure look like they stick out lots, more than I expected. I also expected the wheel to be closer to the strut.

Your looking at a 13 inch Ford Cobra Rotor, VR4 Calipers and a Fast FC01 wheel.

25mm offset wheels will stick way out on a 1g. To fit a 17x9, you want 42mm in the front and 35mm in the rear. There's off the shelf lightweight wheels with those specs that will fit the VR4 calipers.

I am about to swap my fronts to the VR4 calipers and the rears to EVO 8s. Does anyone swap out their master cylinder or have you all been ok with the stock 2g AWD cylinder?

Also, any thoughts on fitment with 17x8 +40mm OZ Ultraleggera wheels?

To the guys who've used the RTM brackets for their 3kgtvr4 brakes, is their supposed to be a gap between the base of the rotor and the caliper? I have a nice ring of rust going on as proof.

llxkevinxll said:

I am about to swap my fronts to the VR4 calipers and the rears to EVO 8s. Does anyone swap out their master cylinder or have you all been ok with the stock 2g AWD cylinder?

Also, any thoughts on fitment with 17x8 +40mm OZ Ultraleggera wheels?

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I did the master cylinder swap. The big upgrade is the brake booster. If yer gonna do big brakes your gonna want the 3g 2.4L master cylinder and brake booster. Same as the evo and cleans up the engine bay nice.

vince6756 said:

I did the master cylinder swap. The big upgrade is the brake booster. If yer gonna do big brakes your gonna want the 3g 2.4L master cylinder and brake booster. Same as the evo and cleans up the engine bay nice.

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Do you happen to still have the part numbers for the booster and cylinder you used? MM ASA has a bunch listed for the 2.4L 3g's. Also, do all years of the 2.4L have the same booster/cylinder? There are a bunch of them in local scrap yards.

To the guys who've used the RTM brackets for their 3kgtvr4 brakes, is their supposed to be a gap between the base of the rotor and the caliper? I have a nice ring of rust going on as proof.

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Yes, there will be an "unused" portion of the rotor near the hub area. It will basically be the difference in radius between the stock 3000GT rotors and the Cobra 13" rotors. I forget what the diameter of the stock 3000GT rotors are but something in the 12" range if memory serves. That would translate into about 1/2" of unused rotor. But whatever the figures are, there's no way around the fact that unless the pads are as tall as the business portion of the rotor there's going to be an unused area.

I decided to look up the figures.
Cobra rotor = 330mm
1g 3000GT rotor = 296mm
so 34mm diameter difference = 17mm difference in radius.