Matt Sheppard

I haven't got any info yet on the other board, so I thought I'd try here:

OK
I have a rod here part # 944.103.110.0RARST (bottom of photo). This is out of my '86 Turbo so I am assuming it is a forged rod. It looks forged.
I also have a rod (set) here part # 944.103.101.3RARST (top) that I bought from a list member who sold them to me as "forged turbo rods - reconditioned". Reconditioned, they are, but they look nothing like the rod out of the '86.
The PET has only 2 #'s for rods used in the 944 engine : 944.103.008.00 and 944.103.001.00, the latter being speced for the M44.50/51/52 engine (turbo engines).
So, I'm confused. Which one is the forged rod? Where can I find true info on rod part #'s other than PET - which seems rather misleading or perhaps incomplete in this case.

TIA
Matt
<img src="http://boards.rennlist.com/upload/rods.jpg" alt=" - " />

John Anderson

Top rod is forged, toss the bottom, or use it as a paper weight.

Definately without a doubt..top.

RSflared72e

So, the 86 turbo DIDN'T come with forged rods...? This seems to come up all the time....but with different answers each time...

Tom Carson

ummm...I also bought a set of the 944.103.110.0RARST as being 'forged rods'...what are they?

Mike B

If you have the rods with part number 944.103.110.0RARST then you have the forged rods.

Edit: Got my pics confused. I know the botom one is forged as I had a couple of sets and researched into it for that part number. Not sure if the top one is forged too.

Perry 951

The bottom one is forged, as per the PN... the top just happens to be cleaner.

In PET, the rods offered for the '86 turbo are PN 944.103.110.0RARST with a revision to the '87 and later cast rods PN 944.103.101.3RARST.

The rods that came with my '86 short block were the 110.0, and the origionals from my '87 were 101.3 This jives with PET, so I would assume it is correct.

I also bought a set of forged rods from Garrity with ARP studs, and they also were PN 110.0

Hope that helps.

Tom Carson

thanks Brian

Mike...I still don't know what John said

Matt says "944.103.110.0RARST (bottom of photo)" which we all agree is forged

LP

Bottom is forged.

LP 86'951

AlexE

Both are forged. Take a pic of a cast rod and you will see the difference.

dualblade

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Perry 951:
<strong>The bottom one is forged, as per the PN... the top just happens to be cleaner.

In PET, the rods offered for the '86 turbo are PN 944.103.110.0RARST with a revision to the '87 and later cast rods PN 944.103.101.3RARST.

The rods that came with my '86 short block were the 110.0, and the origionals from my '87 were 101.3 This jives with PET, so I would assume it is correct.

I also bought a set of forged rods from Garrity with ARP studs, and they also were PN 110.0

Hope that helps.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">wait, so according to your info, the top one is cast. the part # you just mentioned for cast matches the top rod

Perry 951

Alex, PET (Porsche's Electronic Parts Database) specifies what year each part numbered rod is from. Parts reference and build documentation from Porsche tells us that the 1986 944 turbo was the only 2.5 turbo that got forged rods. Because of the cost of manufacture, they swithched to the casting process in October of 1986. Pretty much everything from then on was cast. They also had 4 revisions to the cast rod (as per PET) over the years.

If you bead blasted both types of rods, you could not tell the difference between them besides the relief areas from the forging process, and of course, the part number. I have had both sets of rods in my hands, freshly bead blasted, and it was hard to tell.

Perry 951

Andrew, yes, the top one is cast.

dualblade

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by John Anderson:
<strong>Top rod is forged, toss the bottom, or use it as a paper weight.

Definately without a doubt..top.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica"> </font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Perry 951:
<strong>Yes, the top one is cast.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">heh, i think mr anderson might be feeling a bit sheepish now.

Perry 951

I don't know why John said that.. I know he has seen both rods, and would think to check the part number.

Perhaps a bad day, or his monitor is upside down.

Matt Sheppard

Well, color me blind. A very big thanks to Todd Holyoak for straitening this out for me.

From the information he gave me which is pretty convincing, THEY ARE BOTH FORGED.

The factory manual pictures both the forged and sintered rod next to each other in section 13-34A and has the 001.00 # listed as the "sintered" (or forged) rod. The cast rods have a marked taper toward the small end and do not have part # debossed on the side. Heres a scan of the page:

<img src="http://boards.rennlist.com/upload/rodspic.jpg" alt=" - " />

Explanation: Porsche used forged rods in the early NA's (MY1983 in US) and cast from then on. The Turbo is introduced and they used forged rods for the '86 and cast from then on. The top rod in the picture is from a '83 NA and the bottom from a '86 Turbo.

Perry: This would contradict what you have said. Are you sure the part # for the top rods say they are for late turbos and hence cast. This would mean Todd is in error.