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09-08-2004, 08:52 PM
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#601 | | Member
Join Date: Apr 2002 Location: Blue Springs, Mo
Posts: 100
Car: 1988 GTA Engine: L98 Transmission: 700R4 | Quote: Originally posted by ebmiller88 what can't you break if you hit it enough with a hammer?
Ed | haha - valid point |
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09-11-2004, 11:11 PM
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#602 | | Member
Join Date: Aug 2003 Location: Greensburg, PA
Posts: 157
Car: 85 IROC Engine: 355 Transmission: Tremec 5 speed | wlsmoku,
It seems like grinding your calipers is working for you. I have not been that lucky. I'm growing more and more disappointed with the LS1 brakes. I have had trouble with caliper spread and my calipers have not been ground at all. After reading what Ed mentioned about caliper spread being an issue on the Monte Carlo boards I am very concerned that this will continue to plague my car. For road racing/track day duty, I think the LS1 calipers are not stiff enough. To me, this is a serious design flaw that cannot ever be corrected. If spread another caliper I will probably switch to C5 calipers. I have heard that even the C5 calipers will eventually fail due to caliper spread though. Also not very encouraging. |
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09-15-2004, 05:05 PM
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#603 | | Junior Member
Join Date: Feb 2001 Location: indiana
Posts: 61
Car: '87 GTA hardtop Engine: 383 DFI Transmission: T-56 Axle/Gears: 9-bolt, 3.70, posi, disc | i have not had any trouble with mine, i did not have to grind on the calipers though. i was wondering, does anyone think the Wilwood 6 piston 13" rotor front brake kit for 98 and up f-bodies fit on a 3rd gen after it has had the ls1 upgrade? here is a pic of mine. |
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09-15-2004, 10:09 PM
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#604 | | Senior Member
Join Date: Jan 2002 Location: Walled Lake, MI
Posts: 499
Car: 1989 Trans Am GTA Engine: A dormant LS1 Transmission: A good one, I hope Axle/Gears: 3.27 9 bolt | Well mine are on, look great behind the GTA wheels. Haven't had chance to drive it yet b/c of some trans troubles. Hopfully I'll have an LS1/t56 by next spring/ summer. Then I'll be able to see how much better they are 
__________________ Steve
my rides:
Red '89 Firebird GTA
Green '97 Escort |
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09-15-2004, 10:11 PM
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#605 | | TGO Supporter
Join Date: Nov 2002 Location: Puerto Rico
Posts: 140
Car: 1988 IROC Convertible Engine: 305 TPI Transmission: Auto | I don't know about the one made for 98+ cars but Hawk's Third Gen parts has a kit to put 4 piston Wilwood callipers on 13 inch rotors. It looks suspiciously like a 1LE Kit (brackets were much alike) except they use the Wilwoods. Problem is kit is 1595 plus another 100 if you want drilled/slotted rotors. Seems a bit steep but it does include hubs and all bearings and such. It would be interesting to compare their bracket for this kit with the 1LE. Spindles mods are the same so, in theory, if the bracket is the same, we could get the brackets (available separetely), the calipers and rotors and voila! 13 inchers. Plus, the Wilwood callipers are designed in such a way, that clearance should be a non issue on 16 inch wheels. If anyone can verify/correct this info, please do so. Thanks. |
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09-16-2004, 12:34 AM
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#606 | | Senior Member
Join Date: Mar 2001 Location: Fort Mill, SC, USA
Posts: 6,114
Car: '88 Iroc, '91 RS, and a '70 RS Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the agenda Transmission: A4, A4, slated to be a T56 | Any installed pics, Steve? Any problems with it?
Ed |
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09-16-2004, 12:35 AM
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#607 | | Senior Member
Join Date: Mar 2001 Location: Fort Mill, SC, USA
Posts: 6,114
Car: '88 Iroc, '91 RS, and a '70 RS Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the agenda Transmission: A4, A4, slated to be a T56 | Quote: |
I don't know about the one made for 98+ cars but Hawk's Third Gen parts has a kit to put 4 piston Wilwood callipers on 13 inch rotors. It looks suspiciously like a 1LE Kit (brackets were much alike) except they use the Wilwoods. Problem is kit is 1595 plus another 100 if you want drilled/slotted rotors.
| Does it look like this kit? http://www.spohn.net/product.cfm?productid=1453
Ed |
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09-16-2004, 09:04 PM
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#608 | | Senior Member
Join Date: Jan 2002 Location: Walled Lake, MI
Posts: 499
Car: 1989 Trans Am GTA Engine: A dormant LS1 Transmission: A good one, I hope Axle/Gears: 3.27 9 bolt | Quote: Originally posted by ebmiller88 Any installed pics, Steve? Any problems with it?
Ed |
Well, as a matter of fact I do
A good friend of mine actually put them on for me, as he was doing some trans work at the same time. We thought it would be a good time saving measure. Anyway, he said they went on real smooth, though no road time yet, as the trans problem has led me to decide on just wapping it and the engine.
Here goes nothing:
__________________ Steve
my rides:
Red '89 Firebird GTA
Green '97 Escort |
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09-17-2004, 08:09 AM
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#609 | | TGO Supporter
Join Date: Nov 2002 Location: Puerto Rico
Posts: 140
Car: 1988 IROC Convertible Engine: 305 TPI Transmission: Auto | Yes ebmiller, that's the one exactly. Is there what can you tell me about the possibility of turning our setup in to this one? |
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09-17-2004, 11:29 AM
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#610 | | Senior Member
Join Date: Aug 2002 Location: Sandusky, OH
Posts: 264
Car: 85 Trans Am Engine: 305 Carb Transmission: 700R4 | Quote: Originally posted by V6canvas Well mine are on, look great behind the GTA wheels. Haven't had chance to drive it yet b/c of some trans troubles. Hopfully I'll have an LS1/t56 by next spring/ summer. Then I'll be able to see how much better they are | Steve,
Based on what Ed posted earlier in the thread, spacers are needed with those wheels, right? What thickness did you use, and where did you get them? I plan on using the same wheels when I get mine finished.
Wayne
__________________ 85 Trans Am
71 Firebird (undergoing restification)
87 Trans Am (future Father/Son project) |
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09-17-2004, 05:31 PM
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#611 | | Senior Member
Join Date: Jan 2002 Location: Walled Lake, MI
Posts: 499
Car: 1989 Trans Am GTA Engine: A dormant LS1 Transmission: A good one, I hope Axle/Gears: 3.27 9 bolt | Quote: Originally posted by wilyk9 Steve,
Based on what Ed posted earlier in the thread, spacers are needed with those wheels, right? What thickness did you use, and where did you get them? I plan on using the same wheels when I get mine finished.
Wayne |
Glad to hear someone else using the GTA wheels
Upon request Ed will supply the needed spacers. I believe that they are 1/8" thick steel (aluminum?) "doughnuts" with holes cut for the wheel studs. Work great, there's no interferance at all, though everythigs really close, as you can see in the pic above.
-Steve |
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09-17-2004, 06:38 PM
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#612 | | Senior Member
Join Date: Mar 2001 Location: Fort Mill, SC, USA
Posts: 6,114
Car: '88 Iroc, '91 RS, and a '70 RS Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the agenda Transmission: A4, A4, slated to be a T56 | Quote: |
Is there what can you tell me about the possibility of turning our setup in to this one?
| Galletti, you can do all the work yourself but you've got some fab work to do...all you need to do is fab up the brackets, mod the spindles, machine the hubs, and buy all the parts to do it: rotors, Wilwood calipers, lines, and parts, and put it all together. It can be done. That's the kit Alloy came up with and is offered by Spohn and other vendors.
You bet it's tight...those GTA wheels don't leave a lot of room to play with. The spacer is a GM OEM spacer used on the rear drum cars. It's a bit thicker than 1/8" but not much but it gives the perfect amount of clearance needed to not contact the wheel. I supplied them with Steve's brakes.
Ed |
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09-17-2004, 07:54 PM
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#613 | | Senior Member
Join Date: Apr 2002 Location: Roscoe, IL
Posts: 1,694
Car: 1991 Trans Am Engine: 305 Transmission: T-56 Axle/Gears: 3.73 9-bolt | iirc those spacers are 4mm thick. since i put ls1 out back too, i used mine on the front with my gtas for a while before i bought the snypers |
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09-21-2004, 06:41 AM
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#614 | | Senior Member
Join Date: Mar 2001 Location: Fort Mill, SC, USA
Posts: 6,114
Car: '88 Iroc, '91 RS, and a '70 RS Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the agenda Transmission: A4, A4, slated to be a T56 | Spacer P/N is 14091902, $9 or so each at GMPD.
Ed |
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09-21-2004, 07:19 AM
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#615 | | TGO Supporter
Join Date: Nov 2002 Location: Puerto Rico
Posts: 140
Car: 1988 IROC Convertible Engine: 305 TPI Transmission: Auto | ebmiller88, I actually have all the parts fabed up for LS1 brakes. I just haven't had the time to install them yet. My question would be if all I have to change is the brackets, rotors and callipers. That is...if I buy the Wilwood callipers, which rotors would I have to buy? Also, will the 1LE bracket work for this setup? If not, who would be able to supply one that will? Thanks. |
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09-21-2004, 02:04 PM
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#616 | | Member
Join Date: Sep 2004 Location: Edmonton
Posts: 236
Car: 1983 Z28 Engine: 383 Transmission: 700R4 | Re: Re: Update Quote: Originally posted by lock You and everyone else sharing all this info ROCK. This is what makes thirdgen.org the best damn technical car site on the web!
:hail: | Hi there this question may seen stupid but what size do you print this document at?It opens at 76%,should i take it to 100% to get actual size for printing? 
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09-21-2004, 02:07 PM
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#617 | | Member
Join Date: Sep 2004 Location: Edmonton
Posts: 236
Car: 1983 Z28 Engine: 383 Transmission: 700R4 | Re: Update Quote: Originally posted by 89 Iroc Z I have finalized the bracket here, enjoy.... PDF format Autocad 2002 file
Thanks ed for the set of brackets... | Ok try this again what size do i print this at ?It opens at 76% should i print it at 100%?
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09-21-2004, 05:44 PM
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#618 | | Senior Member
Join Date: Mar 2001 Location: Fort Mill, SC, USA
Posts: 6,114
Car: '88 Iroc, '91 RS, and a '70 RS Engine: 5.7 TPI; 5.0 TBI; ZZ4/T56 on the agenda Transmission: A4, A4, slated to be a T56 | You have to size and resize it until it prints out correctly on your printer. I had to blow it up to 136% IIRC to get it right, I posted it earlier in the thread I think.
As far as Galetti's Qs, that's where you have to do the trial and error thing. First off, to run 16" wheels with Wilwood calipers, you can run the 13" x 1.1" or 1.25" thick rotor so start there. The 1LE bracket won't work since it's a different design. I'd just call Spohn for those brackets unless you have the means to design them yourself.
Ed |
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01-11-2005, 02:42 PM
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#619 | | Senior Member
Join Date: May 2002 Location: PE, Canada
Posts: 1,054
Car: '81 Trans Am Engine: 6.6L Transmission: auto 350 | Quote:
Q: Why is this brake setup called “LS1” brakes?
A: It is a lot easier to type LS1 instead of “98+ Camaro/Firebird”. In 1998 GM introduced the LS1 engine into the F-bodies that same year they also put bigger brakes and a few other goodies. I am just using LS1 as an easy way to identify the 12-inch, dual piston caliper brake setup on these cars.
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this may sound stupid but i dont have the time to search thru 30+ posts to answer this question and to do a search wouldnt work out:
I was under the impression that all 98+ firebirds and camaros had the ls1 brakes you are talking about.....are the 98+ 6cly cars have the bigger brakes on them that your talking about?? Or ONLY the cars that came with the ls1 engine??? |
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01-12-2005, 11:01 PM
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#620 | | Junior Member
Join Date: Mar 2004 Location: Ontario, Calif
Posts: 18
Car: 2002 Camaro SS / 1982 El Camino Engine: LS1 / LT1 in the El Transmission: A4 in both | Looking at my parts file it does not list different part numbers based on the motor.
__________________ 82 El Camino w/ 95 LT1
02 Camaro SS with a few mods |
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01-12-2005, 11:15 PM
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#621 | | Senior Member
Join Date: Apr 2002 Location: Roscoe, IL
Posts: 1,694
Car: 1991 Trans Am Engine: 305 Transmission: T-56 Axle/Gears: 3.73 9-bolt | everything 98+ got these brakes |
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01-16-2005, 01:18 PM
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#622 | | Senior Member
Join Date: Jan 2002 Location: Walled Lake, MI
Posts: 499
Car: 1989 Trans Am GTA Engine: A dormant LS1 Transmission: A good one, I hope Axle/Gears: 3.27 9 bolt | Pedal Feel? Just wondering what everyone's impression of the pedal feel with these brakes on are.
Personally, even though the brakes were installed about 4 months ago, I only just was able to drive it yesterday. I'll have to reserve my final thoughts about it until I get an alignment done, as the steenring wheel's about 45* to the right.
First of all they actully stop the car straight!! My left caliper was sticking (or maybe a line problem), so this is a great feeling. They also seem to be very powerful, slowing the car down with authority. I haven't done any pedal to the floor stops yet, but these things also seem to be easier to modulate too.
The only thing I am unsure about is that the pedal feel is somewhat low effort. Not really spongy so much, but I'd prefer to have a fairly hard pedal in my sports car, not something that feels like my mom's TrailBlazer.
Anyway's I have to give a big thank you to all those responsible for bringing this together.
__________________ Steve
my rides:
Red '89 Firebird GTA
Green '97 Escort |
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01-19-2005, 11:59 AM
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#623 | | Senior Member
Join Date: Mar 2004 Location: Frederick, MD
Posts: 299
Car: '86 Iroc, '87 Iroc Vert Engine: 350 TPI, 305 TPI Transmission: T5 in both Axle/Gears: 3.73, 3.45 both LSD's | First off these brakes are killer! My brake pedal feels a little different than before. Maybe a hair lower. Maybe a hair softer. The brakes work. 1000% beter than stock. I should know I have a 92 with the stock setup. Can't wait to find another set for it.
As for the LS1 brake upgrade, Its named that way because it was an easier way to name the thread. Not because only LS1 equiped cars had them.
Lastly, I would like to thank everyone involved with this project. A big thank you to 89 Iroc Z for getting this started and a big thank you for ebmiller88 for getting all the bugs worked out. Obviously there are so many others involved, Thank You too!!! It is my opinion that this is the #1 Modification that can be done to our cars. That's why I awarded it the 2004 3rdgen faby for best overall fabrication/modification.
:hail: :hail: :hail: :hail: :hail: |
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01-19-2005, 11:34 PM
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#624 | | Senior Member
Join Date: Apr 2003 Location: Rochester, NY
Posts: 667
| hey guys, I scanned through these posts, but didn't see the answer to this.
LS1 brakes are 12". C5 brakes are 12.75" correct? Are the calipers for them the same in terms of dimentions? or are they the same only when it comes to mounting them to the abutment bracket? |
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01-24-2005, 12:41 AM
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#625 | | Senior Member
Join Date: Aug 2001 Location: Fairfax, VA & Norfolk, VA (ODU)
Posts: 2,078
Car: 1989 Iroc-Z Engine: 350, ZZ4 equivalent Transmission: Pro-Built Road Race 700R4 Axle/Gears: 3.23 | Quote: Originally posted by VILeninDM hey guys, I scanned through these posts, but didn't see the answer to this.
LS1 brakes are 12". C5 brakes are 12.75" correct? Are the calipers for them the same in terms of dimentions? or are they the same only when it comes to mounting them to the abutment bracket? | The answer to your question is in the very first post of this thread. Yes C5 are 12.75 and LS1 are 12 inch. The calipers are about the same in dimensions, the C5 is different in that it has strengthening ribs that run along the whole top part of the caliper where the LS1 calipers don't. They are interchangeable on the abutment brackets. |
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02-08-2005, 04:54 PM
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#626 | | Senior Member
Join Date: Jun 2004 Location: South Jersey
Posts: 641
Car: 1991 RS Convertible Engine: 96 LT1 Transmission: T56 Axle/Gears: 3.73 Auburn Posi | Hey Guys,
I got the LS1 Brakes put on my car about a month ago. They work great... But I dont like the pedal feel. I have to push down to far for the brakes to grab. I think if I put in an LS1 master cylinder, it will fix it. Does anyone else aggree with me? |
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02-08-2005, 05:08 PM
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#627 | | TGO Supporter
Join Date: Nov 2002 Location: Grand Island, NY
Posts: 1,132
Car: 1990 Formula Engine: 305 TPI Transmission: WC T5 | Quote: Originally posted by JerseyMark Hey Guys,
I got the LS1 Brakes put on my car about a month ago. They work great... But I dont like the pedal feel. I have to push down to far for the brakes to grab. I think if I put in an LS1 master cylinder, it will fix it. Does anyone else aggree with me? | I had absolutely no problems with mine. You may want to try bleeding the lines again before a mc change. |
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