Does any one have the drawings for the adapters for the 88 viper brackets. I want to use stock 88 calipers with 12 or 13 inch viper or corvette rotors. Thanks

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The drawings are posted for using 88+ Corvette 12" front rotors while retaining the stock 88 calipers. This kit has some fitment issue (lower nose of A-arm rubbing the inside of the rotor... more so on lowered cars, and the WCF style bracket can cause the caliper slider to hit the upper a-arm and limit the turning circle.

WCF style (not necesarily the exact dimensions for the WCF brackets):


FieroAddiction's 2nd version of these brackets solved the upper A-arm interferance issues, but the lower a-arm nose would still need to be clearanced. FieroAddiction no longer is in the fiero parts business unfortunately.

FieroAddiction style (again probably not the exact dimensions as FieroAddictions):


Here is a good thread about the 88 12" Covette rotor upgrade with lots of pics:
https://www.fiero.nl/forum/Forum2/HTML/112414.html

The 13" Viper Rotors are alot less common, and with that comes less documentation. Here is a pic of the WCF setup:

One thing to notice is it looks like the Viper kit uses the same barackets as the 12" Corvette kit and then an additional bracket to further relocate the capilers and correct the rotor offsel. This kit does not have the same lower a-arm to rotor interferance (differnet rotor offset), but the caliper are still located pretty high up on the front so the upper a-arm interferance could still be an issue.

I took my spare 88 spindle, caliper and a set of 88-95 12" corvette rotors to my machine shop and the guy is going to make me a set of adapters. I will let you guys know what happens. Thanks

Update, I do not have the brackets yet, But I took the set up to another shop and he said by the end of the week. Also he said that he could make them out of aluminum and they would hold up just fine. He said that he makes his out of aluminum for his dirt track car. So hopfully this weekend I can get a set installed and let you guys know . thanks

quote Originally posted by fieroguru: The drawings are posted for using 88+ Corvette 12" front rotors while retaining the stock 88 calipers. This kit has some fitment issue (lower nose of A-arm rubbing the inside of the rotor... more so on lowered cars, and the WCF style bracket can cause the caliper slider to hit the upper a-arm and limit the turning circle.

I didn't have any issues with the front calipers hitting the upper A-Arms on my WCF kit. I had to do a bit of fiddling with the brake line to get that not to hit the wheel or the A-Arm. Not sure if perhaps the design changed. One thing I noted, was that there was 3 types of brackets. the 2 Front brackets, rear left, and rear right. The rears were mirror images due to using a countersunk bolt.

The lower A-arm is a guaranteed problem with the Corvette rotors. A few minutes with an angle grinder will remove enough metal so that it will not be a problem. the issue gets worse the more compressed the suspension is.

Got a call from the machine shop today and the brackets are done. I will pick them up on my way home from college tomorrow. If they fit ok, he said that he could make more. So If anyone is interested. PLEASE let me know. thanks lonnie

So are these interference issues the reason we can't add a better caliper to it? I would like bigger rotors but not with wimpy Fiero calipers.

quote Originally posted by Alex4mula: So are these interference issues the reason we can't add a better caliper to it? I would like bigger rotors but not with wimpy Fiero calipers.

Your calipers are not wimpy. Your pads are. Relocating the caliper further from the hub will give the caliper more torque on the hub, making them "less wimpy". But seriously... look into changing to a more aggressive pad for the biggest bang-for-the-buck upgrade. Hawk HPS or similar is a good upgrade for a street car.

That said, to the OP, I'd like to see these FIT to your car and hear if there are any clearance issues.
Thanks.

From what I could tell after installing mine, the interference issues are from the corvette rotor sitting approx 3/8" inch deeper pushing the caliper in that much also. Plus with the brackets that rotate the caliper away from their original position puts it in the way of one of the control arms. By using the adapter that maintains the position (up/down) the interference with the control arms and the caliper are removed but the deeper inner face of the rotor is very likely to rub the tip of the LCA even after removing a substantial amount of material from the tip of the LCA. I think the Viper rotors have about the same amount of offset as the Fiero rotor which should keep the inner face of the rotor away from the tip of the LCA. I suspect that the 13" system from WCF for the 88 would be the way to go as far as brackets are concerned. There may be other "minor" issues that I am not aware of though.

Charlie

I have installed my set and have no issues so far.The rotor on the front is very close to the lower control arm- I will try to get some picture up in a day or so.

quote Originally posted by Z3SpdDmn: Your calipers are not wimpy. ...

So are you implying that the stock caliper is as good as a 4+ piston one? The pads can do so much. Is just I heard from someone who did this and told me improvement is not that great.

the main reason I did it is for looks. I have 18 inch wheels and those tiny rotors looked funny.LOL, but I would say it improved my braking by at least 15 percent and that is with junk old factory pads. thanks

quote Originally posted by cptsnoopy: From what I could tell after installing mine, the interference issues are from the corvette rotor sitting approx 3/8" inch deeper pushing the caliper in that much also. Plus with the brackets that rotate the caliper away from their original position puts it in the way of one of the control arms. By using the adapter that maintains the position (up/down) the interference with the control arms and the caliper are removed but the deeper inner face of the rotor is very likely to rub the tip of the LCA even after removing a substantial amount of material from the tip of the LCA. I think the Viper rotors have about the same amount of offset as the Fiero rotor which should keep the inner face of the rotor away from the tip of the LCA. I suspect that the 13" system from WCF for the 88 would be the way to go as far as brackets are concerned. There may be other "minor" issues that I am not aware of though. Charlie

Yes, the 12" vette rotor pad surfaces are offset about 3/8" inboard of the fiero rotors. While this moves the rotors and calipers inboard 3/8" and increases the chances for interferance, it is also why the brackets for the kit are super simple... just a flat piece of 3/8" steel. The offsetting provides the room for the flat steel stock to slide right into place.

Now the 13" viper rotors have a very similar offset as the fiero rotors, so there are not any of the interferance issues of the 12" kit, but the brackets are more complicated. Since the calipers were not offset, the caliper bracket must incorporate the offset so it can attach to the caliper. WCF just adds a 2nd set of caliper brackets on top of the 12" covette brackets for the 13" kit. This doubles the number of fabricated parts which will increase the cost and complexity of the swap.

here is some picture of the install.Thanks lonnie

https://www.fiero.nl/forum/Forum4/HTML/055435.html

quote Originally posted by fieroguru: Yes, the 12" vette rotor pad surfaces are offset about 3/8" inboard of the fiero rotors. While this moves the rotors and calipers inboard 3/8" and increases the chances for interferance, it is also why the brackets for the kit are super simple... just a flat piece of 3/8" steel. The offsetting provides the room for the flat steel stock to slide right into place. Now the 13" viper rotors have a very similar offset as the fiero rotors, so there are not any of the interferance issues of the 12" kit, but the brackets are more complicated. Since the calipers were not offset, the caliper bracket must incorporate the offset so it can attach to the caliper. WCF just adds a 2nd set of caliper brackets on top of the 12" covette brackets for the 13" kit. This doubles the number of fabricated parts which will increase the cost and complexity of the swap.

True, and what I am thinking is that it would be worth it if you wanted to lower your front end without worry of contacting the LCA under compression.

Charlie

I have 2 1/2 sets left. You get front and rear set for 105$ shipped. thanks Lonnie

all current sets are sold. Does anyone else want a set,if so I can get more made. Thanks Lonnie

I am selling these as a set now.
rotors
bolts
brackets
rings
Every thing needed to bolt them up
front and rear kit is 450 Shipped for regular rotors
500$ shipped for slotted rotors. Thanks lonnie
Send payment to paypal. kyramcmillen@yahoo.com

anyone still want a set. Thanks

Posted in your mall thread.
Thanks!

[This message has been edited by Raydar (edited 09-07-2011).]

set of 4 brackets are 105$ shipped. Thanks Lonnie

Folks:

If you are going to all the trouble to add 13" Viper rotor, you might consider this to make it really worthwhile, but the Wilwood ebrake WCF built is as worthless as WCF said it would be:







Regards,

David

[This message has been edited by MountainHiBlue87GT (edited 09-07-2011).]

Lonnie,

You have a PM.

Larry

quote Originally posted by imacflier: Lonnie, You have a PM. Larry

Don't hold your breath. He's screwed me too.

https://www.fiero.nl/forum/F...ML/055435-3.html#p88

I did not scew you I sent your set first.

You didn't email me jack squat.
After three weeks of really piss poor communications, you told me they were shipped last friday only after I told you I wanted a refund.
It's been a week since they were "shipped". (No tracking number of course.) I have not received them.
Aside from that, imac paid three days before me. Why would you ship mine first?
And why would you tell imac, 4 days ago, that they hadn't even been made yet?

I don't believe a word of it.

If they show up, with a postmark of 9/30 as you claim, I'll apologize in front of the whole forum.
Until then, you're full of brown.

BTW... you probably shouldn't worry about making any more. One of the other fabricators (who has a stellar reputation) has them in the works.
You've pretty much screwed yourself. How's it feel? Did you at least take yourself out to dinner?

[This message has been edited by Raydar (edited 10-08-2011).]

quote
Originally posted by Raydar:

You certainly didn't email me. I can't speak for imac.



If you're going to have some by the end of the week, that's cool.
Just let me know what's up.

Thanks for the note.

Steve
----- Original Message -----
sorry for the late reply. I thought I had a few sets already made up. But i guss not. So I can ethier give you a refund or I should have a few sets by the end of the week. Sorry for the inconvenience. lonnie
(i did not email you, who is the LIER now, Steve)

Vendors who do not have inventory to sell, should never take payment until inventory is available and ready to ship. It is not a customer's job to finance your materials, sub contractors, etc. It is yours.

If you are making little or no profit, this is not your customer's concern. It is not right to take someone's money and THEN tell them that parts are late, not available, etc etc....

I don't know what it is about the little Fiero world, but this seems to be a recurring theme here. I have never seen this before with BMW and other parts I bought. It is amazing how many people here take payment., then are late to ship or disappear for a month or two, only to come back with a sob story.

I thought The machine shop guy had a few sets made, but he did not, Once I found out I email them and told them I would refund their money or they could wait for the parts to be made and that I would ship them out asap. I do not do this for a living and only wanted to help out our fiero family. I am very sorry if I upset anyone or inconvenced anyone in the process.Thanks Lonnie

quote Originally posted by fierofan25: Becouse he was not being a @#$% about it.

I didn't start being a @#$% about it until you ignored my PMs (while posting in other threads - like the 3800 IAC thread) and lied to me.
You could have communicated with me. Communications goes a long way. You chose to ignore me. Never a good thing to do when you have someone else's money.

And I haven't even really begun to be a @#$%.

[This message has been edited by Raydar (edited 10-09-2011).]

Just do the right thing and either refund the money or send the parts. Ask your customers which option they want and then do it. Simple as that.

I sent you out another set priority mail, this time with a tracking number. should be there on Tuesday .When you get the other set just keep them. Lonnie

[This message has been edited by fierofan25 (edited 10-09-2011).]

Thank you.
And if I ever get the "other" set, I will absolutely not keep them. I will send them back.
All I want is what I paid for. Nothing more.

YIPPEE!

I received my brackets from Lonnie today! It was painful and slow (five weeks), but I have them in hand and can hardly wait to see for myself if it is possibe to shove them under stock 15" lace wheels on my '88. (I have been assured they will not fit under the fronts without some significant grinding of the caliper bridge, but I am pretty stubborn and just must see for myself.)

Thank you Lonnie.

Cool!
Very good.
I have every expectation that mine will be on the porch or in the mailbox when I get home.
I will reserve all non-technical comments for the other thread.
Now I have something to do this weekend.