The RSR rep. project in Thailand

[Burint]

Hi
This post is from a friend who's not yet to become a member.
I welcome to all your opinions.
Thanks
Burint

Hello,

My project is a replica, late 1973 2.8 RSR that the factory put 3.0 high butterfly
engine in as the 2.8 had reliability problems. The shell of 73 911T

My project Engine :

The 3.0 euro spec RSR engine with slide valve T body and twin plugs.
The engine was imported to Thailand by a friend long time ago.

Where can I have engine spec for engine rebuilding Torrance ?

Where would you send MFI pump and T body to have them re-conditioned?

Who would be best to inquire on the RSR engine and carry more parts between Jerry Wood and Andial ?

Can we use high butterfly T body with MFI pump that was used with slide valve T body?

Are the crank and rods the same as the 3.0 sc ?

Would Carrillo rods improve the HP?

Gearbox:

It comes with the engine and is original RSR box but do not know the ratio, it has oil pump and oil cooler attached

Where can I get the right parts for the re-building and the specs?

Suspension:

I read in the RS-RSR book that late 73 2.7RS and all the 2.8RSR had the
rear sus pick-up point moved inwards to improve cornering.
Do you know exactly how they did it and if I don't do it what is the
effect?

Thank you for all your helps.

Longlom
longlom.Bunnag@ap.joneslanglasalle.com

[Tyson Schmidt]

I can answer the last question.

The revised rear suspension pick-up points were done to homologate them for racing.

The idea was to increase the camber change in the rear to better match the body roll. Of course, that was for the tires and suspension of the day.

I'd recommend not changing it on your car, as it is a lot of expense, and really only a benefit if the person setting up your suspension really knows what they are doing, and can take advantage of it. Otherwise, it's more likely to degrade the handling. Not much bang for the buck there.

With todays tire and suspension technology, you really don't need or want that much camber change, and it's easier to make the roll angle match the existing camber curve to achieve the same goal. In other words, a little more roll stiffness.

Raising the rear pick-up points would be a better idea, but that requires adding inner camber boxes, and 935 spring plates with the extra upper mounting points, along with going to coil-overs.

[TRE Cup]

Welcome to the board ! I will answer some of your questions below within your message
You have a very special engine. If it is indeed a slide valve 3 liter RSR engine, it is quite rare and some of the parts are getting harder to find.


My project Engine :

The 3.0 euro spec RSR engine with slide valve T body and twin plugs.
The engine was imported to Thailand by a friend long time ago.

Where can I have engine spec for engine rebuilding Torrance ?

Where would you send MFI pump and T body to have them re-conditioned? Henry Schmidt at Supetec can go thru both and rebuild them to specification

Who would be best to inquire on the RSR engine and carry more parts between Jerry Wood and Andial ?
The bearings will be difficult to find. Rod bearings on a RSR crank are chamfered. You already know about Woods and Andial. Henry may have some, Engine Builders Supply may know where some are; otherwise you will have to check with Freisinger in Germany- he has one of the largest parts availability of the rare racing parts

Can we use high butterfly T body with MFI pump that was used with slide valve T body? I am sure you can and slide valve is a terrible set up to use on the street- the slides can get stuck very easily so high butterfly is much better. I think you will have to make some linkage modifications, but the pump is a good one

Are the crank and rods the same as the 3.0 sc ? NO ! the RSR crankshaft has radiused bearing journals and a 6 bolt flywheel end

Would Carrillo rods improve the HP? NO- connecting rods do not increase horsepower. RSR rods were polished and very strong. If you are in need of replacing rods, then installing carillos is a good option. Some RSR's came with titanium rods too- bearings are special for those as well

Gearbox:

It comes with the engine and is original RSR box but do not know the ratio, it has oil pump and oil cooler attached

Where can I get the right parts for the re-building and the specs? The box is basically the same as an early production 915. You can find books that show how to rebuild the transmission. I would recommend upgrading some of the operating sleeves/ doog teeth to the later style. As the mainshaft has provision for driving the oil pump, you most likely will want to keep that.

Suspension:

I read in the RS-RSR book that late 73 2.7RS and all the 2.8RSR had the
rear sus pick-up point moved inwards to improve cornering.
Do you know exactly how they did it and if I don't do it what is the
effect?

As tyson indicated, plus the arms are different for these cars as well. BUT the 911 turbo has this same geometry, so if you duplicate the specifications found on a 1976-1989 turbo and use the turbo aluminum arms, you will end up with the RSR modification for your car.
But again it is a move that is both expensive and "going backwards" if not set up right to take advantage of it

[randywebb]

Henry = Supertek -- do a search to find some his posts & his pics of the engines he builds

[vash]

kup kuhn krap!

[Burint]

Hi
Thank you so much for your help.
We'll move ahead on our 2 project cars, my 1970, 3.2 rs and Longlom's 1973, 3.0 rsr. I'll post the update pictures soon.
Burint