1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

bp12a what clutch?

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Old 01-12-10, 05:55 PM
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bp12a what clutch?

Its a 225 mm clutch out of an 83-85 transmission

the cars engine setup is
12a bridgeport with notched housings
racingbeat intake manifold/headers
holley 600
direct fire ignition
efan
and a few more mods

i'm trying to shoot for atleast 200 at the wheels what clutch would be good for this?
the stock one seems really weak so and i've got a new clutch master/slave cylinder setup
Old 01-12-10, 06:13 PM
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pm sam. he could probably advise better than anyone. afterall, it was his car u got.
Old 01-12-10, 06:22 PM
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yea i was too lazy to find his screen name and i was gonna post somethin else but i forgot what it was haha
Old 01-12-10, 07:50 PM
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i would run eather a street/strip clutch OR a six puck clutch.

:AA:
Old 01-12-10, 09:42 PM
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4 or 6 puck with dual diapram pressure plate 3K lbs
Old 01-12-10, 11:19 PM
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I've always been partial to the "Centerforce" dual friction clutches, but I haven't put one in my seven yet, thats going in with the motor and suspension swap next. They are smooth and great for street and mild competition.
Old 01-12-10, 11:52 PM
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Originally Posted by dbssr1212
yea i was too lazy to find his screen name and i was gonna post somethin else but i forgot what it was haha
bad 83 is his ID here.

https://www.rx7club.com/members/bad-83-77245/
Old 01-13-10, 08:14 AM
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haha thanks mike
i couldn't find him in my inbox so i was like wtf?

oh and took the 7 to rd yesterday =]
felt so good driving it
besides the weak clutch and only half of my new bushings being on it drove like a beast =]
Old 01-13-10, 09:12 AM
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no problem. and it's actually michael. what's ur rd classmates think of the rotary? still trying to get over this cold but don't forget i'm available on weekends if u ever could use alittle help with stuff.
Old 01-13-10, 01:23 PM
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I have a Stage 3 ceramic clutch on the widebody. Love it. Pedal is a little heavier than stock, but not much. Never slips with the wide tires and I can feather it, which one needs with a highly ported engine. Unless you like doing 3500 rpm rabbit starts all the time like some puck clutches can do.
Old 01-13-10, 02:22 PM
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oh sorry my bad

but anyways most of them think it sounds like a pissed off weed eater but i told them its quicker than their v6 mustangs and it won't blow up when it hits about 6k rpm haha

and yea i haven't had anything to really work on since its this cold and the fact that the cars at rd now

got 2 more dents i wanted to fix before paint so i'll try and get them finished tomorrow

today was cut short cause we all had to go watch some video on structural repair
so i only got one dent done
Old 01-13-10, 02:24 PM
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oh and back about the clutch
i'd like to have it where its not too hard to press in
about like my buddys honda i think his is a stage 2 exedy or somethin
Old 01-13-10, 04:05 PM
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Your bridge port engine is going to turn a lot of rpms, and I would not recommend any type of organic clutch material; only sintered metal clutches. I have been running a PP road racer for about 13 years now. After about one year of using a good organic race clutch disc, one day the clutch disc exploded on me. It could not take the sustained high rpm use (I shift at 8800 to 9000 rpm.)

Since then I have been using only sintered bronze or copper clutch discs with no failures.
Old 01-13-10, 07:01 PM
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i don't think i'll be shifting at 9 very often though unless i get to take it to like road atlanta or something or an actual track

seeing how i already got the cops called on me and kicked out of a neighborhood for going the damn speed limit ( cause it sounds so loud even at 35 mph )
Old 01-13-10, 08:00 PM
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Thumbs down

then why dont you re-read your original question noob. and ask yourself why you own an engine that is built for racing and expect it not to attract attention.
Old 01-13-10, 08:05 PM
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good god man..you should have stayed with stock port's...its only a matter of time before you get popped if you already cause that kind of attention..

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Old 01-14-10, 12:00 AM
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derrik maybe u should look in to changing the muffler to quieten it down some. alto u'll have to live with the lesser hp it'll create. which probably wont be that noticeable.
Old 01-19-10, 04:21 PM
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i never said i didn't think it would attract attention but the mufflers already been quieted down once and i'm about to try and get a presilencer made for it

i know that its not a regular car and i'm not building it for that
the question was basically which clutch would be the best for the power its making without burning up too fast or without having to workout to press the clutch in


i'm going to try and put one of my stock clutch setups in until i can get the clutch that it really needs
Old 01-19-10, 04:24 PM
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and i know these are noob questions because i've never really had any cars that i've had to mess with the clutch or anything

but anyways if i'm pulling my stock clutch off my spare tranny then what are some signs that i can use it or what are signs that its shot
Old 01-19-10, 04:38 PM
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a sign that it's worn out is that it will slip an excessive amount. like in 4th or 5th and u floor it, the revs start increasing but ur really not moving any faster.
Old 01-19-10, 04:47 PM
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yea but like i have a spare tranny well 2 right now and neither of them are in running cars so i can't really tell from that

what will a bad clutch disc or well the whole setup look like if its bad?
Old 01-19-10, 05:08 PM
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heres a picture of one of the possible donors

worth trying or not?

Old 01-19-10, 05:22 PM
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from just looking at the pressure plate do you think i should go ahead and take it all out?
Old 01-19-10, 05:57 PM
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Old 01-19-10, 06:22 PM
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the disc is good, use it. u'll have to get some scotchbrite on the rust on the pp.


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