[327RUSGP]

hi guys..im hoping sumone could give sum valuable advise
i keep blowing out my pressure plate at about 8000rpm on my 325is
i was told it was because my crank was not balanced
i stripped my motor down and balanced all rotating parts and built it up from scratch
after doing my run it i decided to hammer the car abit

RESULT :ANOTHER BLOWN PRESSURE PLATE

does ne1 knw y this is happening
or how i can stop it from hapening again

thanx guys

[kreem_y]

Shocking....8000rpm. I'd say don't hammer it, keep it out of the red.

I know Hennie has some experience with blown pressure plates.

Was also thinking, what if your crank has been damaged? Have you had it checked out?

[ZaiKie]

I think its because it was not designed for 8000rpm
I read about this, but I am almost 1oo% certain its because of that high RPM

[327RUSGP]

yea it is the rpm...but wen i bhut the car it wud easily rev to 8200 thts were the limiter came in..then i dropped a valve redone the motor blew 4 pressure plates
stripped motor down sent CRANK in for assessment and full balance and enjine rebuild...
a bud says the flywheel and clutch also needs to be balanced..
i luv driving in the revs i need the motor and PRESSURE PLATE to handle it

[327RUSGP]

apparently we can have the pressure plate straaped ?
do u thk button clutch also nessesary?

[327RUSGP]

any other ideas guys....got hold of joe martin he says its cause of the torque on the car...he says its normal problem

[ZaiKie]

No such there as a norm prob Hehe
It should get sorted in anyway

[hennie]

on mine it riped the straps off all we did is to fit thicker straps from a izuzu diesel bakie pressure plate to the pressure plate and it haven't done it since take but i dont rev that high mine cuts at 7200
what brand pressure plate are u using i found that the luk is the worst one of the lot when this happens and it dies quicker the luk kit on mine broke when i revved it up stationary and it was in gear only went up to 4000 rpm and broke the strap no gears after that with the valeo and the sachs i could still drive the car and select gears
also luk didn't honor their warranty Claimed there was oil on the clutch plate thats why it breaks the pressure plate where sachs replaced the kit but the better option is to fit a proper racing pressure plate and clutch also make sure that the front crank bolt is tight 400 nm is the torque on it. if it s loose it also breaks the pressure plate
why it can do it is a mystery to me but it does

[commanda]

joh...guys,i was having the same problem on mine too,changed to double diaphram,pressure plate and a 5 button clutch,
but guess wat now?.....the fippin thing is so heavy,its makin it misserable to drive man, also keeps blowing the plungers
on my slave

[327RUSGP]

LOL...seems im not the only guy with dis problem...it seems the re strapping of the plate seems to be the cheapest option...im using sachs and its brand new u thk il get a refund/replacement....martins motorsport says they hav the racing plate for R1200.00 ...which option do u guys thk is better....(please bare in mind the enjine rebuild already cost a gud few K...doubt im ever gna recover on this car)/


thanx for the reply guys

[guy4ever]

How about fitting an original kit from the agents.
Dnt ask me why but genuine parts always seem to last longer
I think they are manufactured according the specification and also quality.

[Stevin]

Now, I need 2 ask... what is supposedly done to this motor (if it is indeed an M20) that it actually necessitates the need to rev it that high... as I've heard of few M20's revving that high and actually making power up there.

[327RUSGP]

guy4ever, on Jun 3 2008, 11:01 AM, said:

How about fitting an original kit from the agents.
Dnt ask me why but genuine parts always seem to last longer
I think they are manufactured according the specification and also quality.

hw bout u buy the origanal plate...get ur e30 to rev 8200rpm then tell me wat happens
k

[327RUSGP]

Stevin, on Jun 3 2008, 11:14 AM, said:

Now, I need 2 ask... what is supposedly done to this motor (if it is indeed an M20) that it actually necessitates the need to rev it that high... as I've heard of few M20's revving that high and actually making power up there.

alot...go ask joe martins hel tell u

[commanda]

JayDrft, on Jun 3 2008, 12:31 PM, said:

I agree with Stevin,

Beemers are low rev Hi torque motors.......What Stevin was saying, is why do you need to rev it that Hi.....is that where your ultimate power sits or does it end there or what...surely you should have a clue where it peaks and troughs?

anyway....if your car is reving that hi...and its got power to break things...then perhaps its better to fit the race spec pressure plate...if powerful enough you should not experience what Commanda experienced with slow driving....About the clutch slave....I would do a bit of homework if you going to increase the strength of the press. plate. And by the way....its going to take a bit/lot more cash which you WON'T get back...but you got your value once everything runs smooth.

Good luck....and perhaps you should put a bolt under your accel...or just turn it up..either or!

Enjoy and keep it Slideways....Always
Jay....

my sentiments exactly!! i was having high torque values,thats my reason to change to racing plates in the first place,
now i have to live with the consequences

[commanda]

YOU HAVE BEEN WARNED!!!!

[hennie]

do the straps first they charged me r120 to do it if you then still break go for a racing plate that have the right power rating
the normal pressure plate have 2 straps of 1mm thickness mine now have 3 of 2.5 mm thick the clutch is still light
i took a broken brand new sachs one and they just changed the straps took them 20 min. take a new clutch plate with you so that they test it to see if it release properly mine we had to grind a bit on the plate back to get it to clear properly

[Stevin]

327RUSGP, on Jun 3 2008, 11:22 AM, said:

hw bout u buy the origanal plate...get ur e30 to rev 8200rpm then tell me wat happens
k

How about u buy an S50, and get it 2 rev to 10k reliably then come and have a **** swinging contest with me.

I asked a simple question!

I still wont believe that you car is making power all the way up there... unless u running an aftermarket plenum with some series valves in the head (which BTW, u can only go 1.6mm bigger on the intake valve in the M20 885 casting head) , then of course there is the rockers (which can't handle the revs not because of their construction, but more so as their leverage ratio is to great resulting in excessive forces placed onto the rocker at high RPM)... once u over come all this then yes I say MAYBE it is worth it to rev that high.

I'll only belive that when I see pictures

Also, how much power and torque does this car SUPPOSEDLY make?

Maybe I should phone Martin's Motorsport and ask him how exactly he is one of the very few guys in the world to build an M20 that makes power at 8200rpm.

BTW, I never had any problems with breaking clutches... I used an OEM Sachs clutch, and as the ppl that knew my car knew it wasn't exactly a slouch by a very long shot. I think breaking clutches is due to dumping them at high rpm, which if u ask me no clutch will stand up to that forever.

One other thing, maybe you should check that your front nose bolt is torqued correctly, as that can cause vibrations and break pressure plates

[hennie]

my buds 325 revs 8500 on a standard sachs plate and on his car he doesn't have pressure plate problems only the clutch don`t last

[Major]

A 8500RPM M20? lolwut