Technical Question 993RS Engines

[carreraboy]

Ok can someone please tell me in how many different guises the 993RS came in and the various difference and claimed BHP. The various induction and exhaust options.

From my own knowledge there was the standard 3,8 Varioram Motor 300BHP, The Cup and the RSR?

 

[clubsport]

A very brief overview.

993 rs = 300bhp, varioram with hydraulic lifters

cup = 310 bhp, No varioram, solid lifters (as per 964RS) & higher CR than 993RS, different cams and induction/exhaust system.

RSR = 350/360 bhp. uprated race spec barrells & pistons, solid lifters, no varioram,,,different induction & exhaust system often run with restricters depending on regulations, heard outputs quoted from 340-375 bhp.

Chances are you could find RSR's in different specifications, depending on the event they were last run in or developed for!

You should ask PaulMc, the guy selling you the engine, he certainly knows his cars , also PaulH (obviously).

Surely you want a 964 engine with 265 bhp and a restricted 220kmh gearing in a 964 cup-a-like?

 

[Melv]

Is this a test?

Give us a chance Clubbie![]

Might have been easier for Carreraboy to pick up the phone. []

 

[vic cohen]

theres also a road going [ comfort] with special gear ratios for Switzerland !

 

[clubsport]

Des, as Vic alludes to...gear ratios make a huge difference to 993 variants.
Particularly as they are not over poweful.
If you compare drive of a C2 to an Rs, ratios make the most difference to me.
Rs, Cs, cup & Rsr all have their own ratios...more varince in Rsr obviously.

 

[clubsport]

ORIGINAL: Melv

Is this a test?

Give us a chance Clubbie![]

Might have been easier for Carreraboy to pick up the phone. []

I thought he knew all of this?
Somehow he knew all of the 996 mastermind questions, but not the important aircooled detail!

 

[Melv]

Tsk! Tsk! There's obvioulsy water in his blood...... [8|]

 

[carreraboy]

Looking for more detail o the RSR spec presumably different cams, different piston and liners anything else .... particularly different induction and exhaust options, what would they be.

 

[clubsport]

What are you going to take the engine apart and check the spec Des?

Have a look at the engine, intake and exhaust of this RSR for sale with the intake restricter......exhaust is minimal as these are not road cars...... Des, the intake is the trumpet thingy on the right of the picture! []

http://suchen.mobile.de/auto-inserat/porsche-993-911-993-cup-3-8-rsr-karlsruhe/180991367.html?lang=en&pageNumber=1&__lp=1&scopeId=C&sortOption.sortBy=searchNetGrossPrice&makeModelVariant1.makeId=20100&makeModelVariant1.modelDescription=rs&makeModelVariant1.searchInFreetext=false&makeModelVariant2.searchInFreetext=false&makeModelVariant3.searchInFreetext=false&minFirstRegistrationDate=1995-01-01&maxFirstRegistrationDate=1997-12-31&damageUnrepaired=ALSO_DAMAGE_UNREPAIRED&export=ALSO_EXPORT&categories=SportsCar


Don't forget, no filtration on intake and engine hours on a race engine...Do you really want an RSR engine?

When you say you want more detail, do you need the info on profile and timing of cams etc...

What are you going to do with the info?

 

[carreraboy]

Thanks Clubbie, there would seem to be an out and out race engine and a street build spec, all in the detail and I am more than confident my man has all this in hand. I was looking myself for any other suggestions.

 

[clubsport]

Des, I'm always interested to learn about these cars...

What do you know about the "street build spec" you mentioned. I was unaware any of the RSR production run were built to street spec or had homologation.

 

[carreraboy]

As far as I know they were built in various states of tune from the 370 BHP down to 320 BHP depending on the job. The low figure giving the maximum lifespan and the 370BHP boy a short race life. As I say my man is in control and probably one of the biggest experts on this, I just wanted any other input to bounce off Paul but guess there is not much more to add, but thank you everyone for your help.

 

[jason]

LOL you really thought you were going to get more 993RSR race engine info here than is already known by Paul Mc?!!

There's only possibly PH who will be on a similar level so just ring him?

Not being unfair to the knowledgeable members of this forum but when it comes to 993 race engines there's only really 2 numbers to call...


PS Try and find two RSR race engines the same...most race teams will build them for their own purposes come rebuild time...

 

[carreraboy]

I know Jason, I am in the right hands. That was not my question, I was asking for any other options, combinations or anything else, I could bounce off Paul. The car could not be in a better place for the transformation, that's why the car is with Paul now[]

 

[jason]

ORIGINAL: clubsport


Surely you want a 964 engine with 265 bhp and a restricted 220kmh gearing in a 964 cup-a-like?

+1

Des why strip this lovely car and make it into a 964 Cup car if you're not going to stick a 964 cup engine in it?[8|]

 

[carreraboy]

Good question Jason and respect your comments. My head is in a spin. Paul has offered me the opportunity of what is the ultimate air cooled non Turbo engine in my book, the engine can at anytime be substituted for a 964 engine. To me the ultimate chassis and engine Combo, but not purist I know. If there was an original Cup Car engine that would be ideal. In every other department the car will be back to original, I will keep the front 993RS front suspension and rear Cup the perfect combo.

I am on my knees paying homage at the alter of the Leichtbau car 15 will be reborn ....

 

[jason]

Put your energy into finding an original cup engine...there will be one out there, there always is...

Email all the guys on the race "circuit"..they all talk to each other and know a man who knows a man...

Drop a line to PH and Mark Bates, Olav and Schmitz. Then Maxted Page and ask who they think is worth speaking to...

Race community is quite tight nit but they all have good memories of who has what!

I can ask a few German racers for you...

 

[Melv]

Absolutely -if u r going to do it, do it properly!!

 

[clubsport]

No Cobra seats either! []

Why not leave it as it is, an Alzen converted cup car........and enjoy driving it? []

If you fancy the n/a engine instead of the turbo......you could fit that into the current widebody set up and have a 964 RSR- a- like at a reasonable all in cost, that is still an interesting and very usable car.

 

[jason]

ORIGINAL: clubsport

No Cobra seats either! []

Why not leave it as it is, an Alzen converted cup car........and enjoy driving it? []

If you fancy the n/a engine instead of the turbo......you could fit that into the current widebody set up and have a 964 RSR- a- like at a reasonable all in cost, that is still an interesting and very usable car.

I'm 100% with this I have to say. It's a lovely car as it is now, always has been, and is Alzen 001 build. You really need to give some serious thought before diving in and ripping it apart. If you have found some history on it then great, but its history to this car and how it came to be. I fear taking it back to something else is just making the story ever more complicated and blurred and you will never have the original cup race car. If its not broken don't try and fix it