[Ferrari P4 Replica]

Hi All,

 

Obviously I am a new member, but the difference here is I don't own a 968, I do own a 6 spd manual transmision from one of your cars.

 

Why am I here you may ask, I am thinking of mounting it behind a Ferrari 456 V12 engine in my 1967 Ferrari 330 P4 replica.

 

Am I crazy? probably, but my purpose here is to find out more about the capabilities of the transmission.

 

Once I have the appropriate permissions to post in the appropriate area of course

 

Best regards to all,

Mike

 

Brisbane Australia

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[94SilverCab]

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;">Welcome,

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;"> 

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;">It takes about 5 posts until you have full rights, but we look forward to this discussion.

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;"> 

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;">The transmissions are fairly bulletproof, as long as you don't have the dreaded "pinion bearing issue" (search)

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;"> 

<p style="color:rgb(40,40,40);font-family:helvetica, arial, sans-serif;">Jay

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[Ferrari P4 Replica]

Thanks Jay, wasnt exactly sure hiw I would be received not actually ownining a 958 and then hooking it up to a Feza engine.

Cheers for the warm welcome.

Mike

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[apex]

OK the 330 P4 is simply said one of the sexiest cars ever conceived (with abject apologies but abiding love to my 968) so... let's talk about this! The pinion bearing thing I think eventually affects ALL these transmissions so there is that to consider. Not a game-changer or deal-breaker, necessarily, but every 968 owner will have to address it at some point. Ha! Or owner of a 968 gearbox.

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[MLB]

Hi Mike,

I just looked at the kit car from RM Wilson Engineering

http://www.rmwilsonengineering.co.uk/p4/

 

WHOA

(and by "Whoa" I mean "Krikey, mate!")

 

yours gonna look just like that?

Cant wait to see some pics now.

Tell us more of your story and you will soon have enough posts to show some pics!

 

Regards,

--Michael in Madison

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[Ferrari P4 Replica]

Hi Michael, thanks for the warm welcome. Yes RM Wilson has done an amazing job replicating the original - undoubtably the worlds closest replica. Mine I guess is more like the norwood replicas although mine started life as a Nobel P4. Unfortunately i have to live with a fibreglass body and not a hand crsfted aluminium one. Although i have many original parts or handcrafted exact replica parts and also have gone the route of genuine Ferrari suspension, uprights and brakes. Although off later models for road compliance here in OZ.

Regards,

Mike
Hi Michael, thanks for the warm welcome. Yes RM Wilson has done an amazing job replicating the original - undoubtably the worlds closest replica. Mine I guess is more like the norwood replicas although mine started life as a Nobel P4. Unfortunately i have to live with a fibreglass body and not a hand crsfted aluminium one. Although i have many original parts or handcrafted exact replica parts and also have gone the route of genuine Ferrari suspension, uprights and brakes. Although off later models for road compliance here in OZ.

Regards,

Mike
Hi Apex,

Soon as i have the requiste permisions i will search this pinion thing. Dying to know more..

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[Rap]

Welcome. Look forward to pics and narrative.

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[94SilverCab]

OK the 330 P4 is simply said one of the sexiest cars ever conceived (with abject apologies but abiding love to my 968) so... let's talk about this! The pinion bearing thing I think eventually affects ALL these transmissions so there is that to consider. Not a game-changer or deal-breaker, necessarily, but every 968 owner will have to address it at some point. Ha! Or owner of a 968 gearbox.

 

Hi Apex,

 

I have to disagree on this point. The pinion bearing problem was related to factory preload on the pinion bearing. This was not a problem on ALL 968s. I would venture that if the problem has not evidenced itself at this point, it is more likely that the problem will never develop. 90K miles and 24 years down the road, with the watchful eyes of both Pete and Max, and I have absolutely no symptoms.

 

Jay

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[apex]

Ducking head so you won't notice the thread-jacking: 95Silver that's good to hear. I've heard it described both ways: "many, but not all" vs "eventually all of them". I will revert to my usual optimism!

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[ds968]

I have to agree with Jay. After my car's pinion bearing failed I have done a lot of statistical research to see if I could claim restitution from Porsche by virtue of failure to recall their cars in spite of a well known / documented defect which ( allegedly ) affects a significant number of 968 six speed models. At that time , about ten years into the lives of these cars the available info showed that less than 5 % of six speeds were likely to develop this problem . I also contacted NHTS, who apparently has received a couple of other requests for investigation of this matter, and their research did not produce a large enough sample of failures via-a-via production numbers to compel Porsche to issue a recall . So not sure what the real numbers are , or ultimately would be , but I'd venture to guess it's no more than one out any given ten transmissions which will EVER develop this issue . Just my opinion on the latter .

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[ds968]

On a separate note, I think these transmissions are rock solid and can take significantly more power than the 968 stock engine produces . I have not heard a single problem from any members here , myself included , with supercharged engines ( stage 3 SC produces about 320 hp and 300 ft/lbs ...and flash's engine was tuned to nearly 350 hp / 320 ft/lbs ) , nor does it seem that those with renegade 968s who replaced their engines with Corvette ones that have a lot more power and torque than the stage 3 SC noted above , experienced any transmission issues, to our knowledge .. So I think there's a decent confidence level the transmission is durable enough to tolerate a lot more power without problems .

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[apex]

Ha - Mortified that I broadcast fake news. Happy that it sparked a conversation to set me straight. Sad for the 5% of us who ended up with the bum bearing. :-)

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[ds968]

Not really fake news since that statement was qualified by a  "I think" .... it's not as if you provided fabricated evidence supporting that assertion.. and considering how much chatter exists on this forum ( and on the other forum as well ..I think it's the one owned by Ralph Lauren , or at least that's what the initials suggest       )     ,  the fear that most or all cars are, or will be afflicted with that malady, is not entirely unreasonable .   

 

Heck, I'm afraid to post the conclusions of some rather exhausting research and findings which are indisputable FACT regarding timing belts because it's bound to conflict with nearly everyone's opinion here on the topic, and have flames shot on my direction.  And yes, I too have had the misfortune of a timing belt break..same car as the bad pinion bearing.. sheesh, what are the chances, considering both of those issues are relatively uncommon.   However, the very large expenses associated with them gives the topics a great deal of visibility and cause for real concern .  

 

But, returning back to your regular programming now - it's all about the 968  transmission in a supercar.    Good luck, but I think you'll be fine .        :closedeyes:        

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[Chris Vais]

A fair amount of the cost in replacing the pinion bearing is getting the trans out of the car to work on it in the first place. I assume that your trans is not currently in a car so opening it up and doing the pinion bearing, as well as new synchros, might not be a bad idea.

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[94SilverCab]

While you're at it, add an O.S. Giken LSD from RS Barn...tell Pete I sent you.

 

Jay

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[Ferrari P4 Replica]

Thanks Jay, will look into that one. Did any of the original 968s come with lsd? Or were they all open and it was only the RS/club cars that were fitted with lsd's? Reason i ask - thought mibe was but will need to check it to be sure.

Cheers,

Mike

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[94SilverCab]

There were a number of 968s available with LSD. Both Torsen and Quaife (can't remember which was on the early, which was late). The code on the cars was 220/221.

 

I met the guys from O.S. Giken at SEMA, they were surprised that I used their LSD on a street car, I think it was worth every penny for the better cornering (JMHO).

 

Take a look at

 

 968 Forums

<ol class="">[*] 
[*]→ RAISING MY 968 - The Modifying, Care & Feeding
[*] 
[*]→ REV IT UP
[*] 
[*]→ What's the diff? Am I on LSD?
</ol> 

Jay

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[94SilverCab]

<a class="" href="http://www.968forums.com/user/50-rs-barn/" title="">RS Barn</a>(IP: 71.123.37.17)

<p class="" style="font-size:12px;color:rgb(164,164,164);">

Posted 07 September 2010 - 02:03 PM

<div style="margin:0px;color:rgb(40,40,40);font-size:14px;">The OS diff is completely new technology. 

It is a clutch style like ZF but had 28 plates instead of 4. It is designed to hold loads over 600hp and run much cooler.

Traditional clutch diffs have more lock on decel than accel. Usually 30/60 or 40/80 (decel) This is due to preloading the clutch pack to get added accel lockup. Too much decel lock drags the tires through corners and slows you down and wears tires quickly.

The OS diff has up to 100 percent lock on accel and only 50% on decel. The lockup is very smooth also. OS uses a patented center section with bevel gears and lighweight springs to add as much bite as you need exiting a corner.
</div>

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[ds968]

Wow, that's an impressive knowledge of transmissions, but considering it's from Pete, it should not be surprising ..

Interesting about ZF transmissions ; the Maserati GTS has a Ferrari engine and a ZF transmission . Italian power plant working in synch with a German drivetrain . What could possibly go wrong , after all, the last time Italians collaborated with Germans was ...oh, never mind ..

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[RS Barn]

Chris, Max can take out a trans in an hour or so. It takes a good 12-15 hours to R&R bearings. The shop labor book at transmission shops rates job at 21 hrs.

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