Another hot rod

Raspy:

Thank you for the suggestion to contact Carl Thompson. Good idea.

Raj:

Thank you for the 901/22 parts nbr image.

Viewers:

Hope to have images of engine bay, under carriage and fuel bay in color within the next few days.

Raj,

Thank you VERY much....

Stu

Quote:

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Originally Posted by varunan123

Stu


Don't worry i will get you some will talk to robert.

Raj

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Try Manfred Freisinger for 917 spare parts - I believe he made a significant purchase of Type 912 spares.

Are you sure of the bearing part number ? maybe should be 912.103.142.XX

Also, your document from Andial states "pump 1077" - I assume this is a reference to the EP/RLA 1-V1077 regulator section of the MFI pump - the same as used in the 3.0RSR

Hope this is useful info for you

Regards
John

John

Thank you for the Freisinger link. I will take another look at a bearing to double check the part number on it.

I was interested to read the following:
"Also, your document from Andial states "pump 1077" - I assume this is a reference to the EP/RLA 1-V1077 regulator section of the MFI pump - the same as used in the 3.0RSR"

Thanks also for your observation on the the 1077 number referred to on the Andial document. Gus at Pacific Fuel told the shop that the number on the Bosch mfi pump indicates that it is an RSR pump.

I just assumed he meant 2,8 RSR. Thank you for the insight. If you can provide any more information regarding the RSR 3,0 pump we would be interested to learn of it.

An RSR 3,0 pump should complement the 2,9 displacement and RSR camshafts.

Regards,

Tom

Quote:

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Originally Posted by sezme

Tom,

Do you have a source for the quick release clamps?

Stu

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I can have them

Oliver - please get me a set.... I need to get then quickly so the muffler can be correctly fitted for them.

Thank you....

Stu

Tom

Here's the summary of info I've collected on the various Racing Department MFI pumps - sorry I dont have any further details on the 2.8RSR pump. Perhaps others can provide more detail..(I'd be most grateful)


906E PES6KL60A120
907 901/21 PES6KL70A120RV1612 EP/RLA 1-V837
771 2.2L PES8KL60A120LV1622 EP/RLA 1-V891
908 PED8KL60A120RV1455 EP/RLA 1 V961
917 4.9L NA PED12KL60A120LV1677 EP/RLA 1-V997
2.8RSR PED6KL60?120RV???? EP/RLA 1-V???? SPCAM=V94
3.0RSR PED6KL60A120RV1668 EP/RLA 1-V1077 SPCAM=V109
935 PED 6KL SPCAM=V114

Regards
John.

JCGE

It is surprising how very little detailed information has been published regarding Porsche factory race engines, parts and specifications from the era encompassing 906 through RSR 3,0.

It seems that the well known engine builders carry the information in their heads but the rest of us depend on the sketchy information in the old parts manuals and Bruce Anderson's book.

This makes your table of information on Bosch mfi race pumps a very unusual and interesting bit of reading. Thank you for the post.

One of the reasons that I am enjoying the powertrain aspect of the project the most is learning about factory race preparation techniques and parts.

The old Andial engine for the hot rod is representative of how the Race Department did things and it is interesting to see that the parts proven over the years continued to be employed for so many seasons and different racing series.

For example, on the Andial engine there are parts with their origins from 906, 917, 908, 2,2S, 2,5 "ST", 2,8 RSR and RSR 3,0.

Thank you again for posting the competition pump table.

Stripping the balsa reinforced front lid is a delicate process.

In order to avoid damaging the piece, it was sent out to a specialist who restores proper (ie plastic) factory race cars.

This image provides a good illustration of how the slivers of balsa were bonded into the underside of the grp lid.

911.511.901.00 Hood front materia artificiale

There are some other bits for the hot rod from the same unknown ST that is the donor of the lid.

Donor ST written off in-period somewhere in Germany.

Update: Second image shows floors in color coat devoid of all evidence of the original soundproof matting. This detail is consistent with how a factory built ST would appear. You will note the remnants of carpet adhesive surrounding the painted floors. These were intentionally left alone as we will be gluing in needle felt lightweight carpet onto those areas.

Update: Third image shows pan in final primer, ready for color.

This post is for the proponents of open exhaust systems among us. Here is an original exhaust system for the old Andial engine.

This is a proper race department exhaust system that is correct for 2,8 RSR and RSR 3,0. It is comprised of one exhaust carrier and two fabricated megaphones. The megaphones (diffusers) are made in left hand and right hand versions to provide the correct angles to sit in the brackets on the ends of the exhaust carrier.

Some tell me that this is also the correct system for a 2,5 ST engine, Typ 911/70 and Typ 911/73. Upon review, it seems there are no part numbers listed for these parts in the april 70 Competition Spare Parts List for Type 911S competition type.

However, based on the period image of the ST in the pits at 'ring shown in the final image below, I would have to agree that this is the correct race exhaust for an ST, at least a 2,5 car.

One does find the part numbers listed in the Spare Parts List Carrera M491 1973 2,8 LTR, which is the type known as 2,8 RSR today, but never referred to as such by the factory. The RSR nomenclature was an invention of Erwin Kramer.

There is a fair amount of hand fabrication in evidence on all three parts. For instance, look at the welded seams on at the base ring of the megaphones and also the butt welded seam that runs the length of the meg. The exhaust carrier shows hand work at the support ends of the bracket.

These exhaust bits appear to have been built on a jig as all three pieces are fabricated with subtle angles and bends so that they mate up properly to factory headers and exit under where the bumper horns would normally be mounted.

I suppose that the intent of having quick release clamps on the rally box muffler exhaust system was so that it could be quickly removed and replaced with a system such as this for special stages on tarmac or circuit use.

The part number tag on the exhaust carrier is no longer legible.

The exhaust carrier is finished in factory style green metal etching primer.

The megs are painted satin black over bare steel without evidence of primer.

These parts appear to be "take offs" as there is evidence of them having been mounted only briefly before being put on the shelf. So while somewhat shop worn, they are virtually NOS examples of the way things were done in the day.

The part numbers listed in the Spare Parts List Carrera M491 1973 2,8 LTR dated Febr. 1973 (note that the factory did not call it an RSR yet) are as follows:

911.111,043.72 diffuser left
911.111.044.72 diffuser right
911.111.153.01 support for diffuser
911.111.420.01 tension spring (2)

I updated this post with an image of an ST in the pit lane at the Nurburgring. Judging from the pic, this car is a 72 as I cannot see an oil tank and there is a 2.4 emblem on the grill. This image is interesting because it shows a factory 2,8 style race exhuast on a 2,5 ST.

Upon further research it is now clear that these parts were catalogued for the 2,5L car and the part numbers shown in the November comp spare parts list are:

911.111.043.00 Diffusor zyl. 1-3
911,111.044.00 Diffusor zyl. 4-6
911.111.153.00 Support for diffuser

The relevant page from the November comp spares list for Type 911S Model 72 Competition Type (the 2,5L car) is shown below in this post.