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So after tearing down my 86 turbo block. I discovered the block was an 86 924 S block. Any ways, I was planning to use the rods and crank from that block, not sure if they are original to the block but they are RARST rods and a non scored crank. I was wondering if there were different versions of the RARST rods or crank types used in the variety of 944 style blocks. It's not a cast rod, but I wanted to be sure it's to turbo specs for my build. They are in good condition.
I thought the 924 S was '87 & '88, but I am not up on 924's. You can tell the late from early blocks by what kind of tensioner is on it and the balance shaft bearing bridge. Those look like turbo rods to me.
Those are standard '86 951 rods. You sure it's a 924S block? 87-88 blocks were different that '86.
Yes I'm pretty sure. I'll post a pic of the block code in a minute. My car is an 87 that had an 86 motor put in it . So it's not original by any means.
You said these are standard 86 951 rods? So does that mean these are the forged ones or? They definately are not the narrow necked cast ones you see in this pic, web search(cast on top/ turbo on the bottom)
And yes it is an 86 block. Has no auto tensioner holes in the block and 2 piece balance shafts
The rod on the bottom may be a Rarst sinter/forged rod from a '82/83 NA car, if I'm reading that number correctly. Is that a .3 at the end? I had these come out of my '82 motor (944.103.101.3 RARST), but my script/font looks smaller.
All of the RARST rods are forged, all are strong, and all are heavy. If budget is a concern, they are still a good choice. That said, they are not the best choice for a high strength rod since other than being heavy, they are all long in the tooth. Certainly consider the Rod Mod which provides a much more durable bearing for performance applications. When you see a rod break, it's root cause is typically a bearing failure which over-heats the rod until it fails.
I've used them in plenty of engines over time, and have experienced very good reliability. That said, these days I'm encouraging a good, lightweight, yet inexpensive rod like what Molnar is producing (source: Racer's Edge). I like these rods. The one's that have come through the shop are high quality both in finishing and dimension. Like any rod, best to have them checked over by a competent machine shop before installation.
Last edited by michaelmount123; 08-02-2016 at 03:13 PM.
Reason: corrected typo
All of the RARST rods are forged, all are strong, and all are heavy. If budget is a concern, they are still a good choice. That said, they are not the best choice for a high strength rod since other than being heavy, they are all long in the tooth. Certainly consider the Rod Mod which provides a much more durable bearing for performance applications. When you see a rod break, it's root cause is typically a bearing failure which over-heats the rod until it fails.
I've used them in plenty of engines over time, and have experienced very good reliability. That said, these days I'm encouraging a good, lightweight, yet inexpensive rod like what Molnar is producing (source: Racer's Edge). I like these rods. The one's that have come through the shop are high quality both in finishing and dimension. Like any rod, best to have them checked over by a competent machine shop before installation.
So what is the difference between these?:
944.103.110.0 RARST
944.103.110.3 RARST
Post a link to the rods your talking about if you would too.
Last edited by mahoney944; 08-02-2016 at 03:56 PM.
The .3 is sinter-forged. When I said it looks like the picture has the .3, I meant the one you pulled from google images right before that post. It looks like a .3 whereas yours are almost certainly stock 951 forged rods.
The .3 is sinter-forged. When I said it looks like the picture has the .3, I meant the one you pulled from google images right before that post. It looks like a .3 whereas yours are almost certainly stock 951 forged rods.
What's better sinter forged .3 or my forged .0? Does it make a difference?
I too was asking about that a few months ago, I came up empty. I found that they're a lot better than cast but may or may not be as strong as drop forged 951 rods. There is a guy running 700+whp on them over on the 928 board if that's anything to go by. I have both sets (Rarst sinter forged and Rarst 951 forged) and I'll use the 951 rods just for peace of mind.
I too was asking about that a few months ago, I came up empty. I found that they're a lot better than cast but may or may not be as strong as drop forged 951 rods. There is a guy running 700+whp on them over on the 928 board if that's anything to go by. I have both sets (Rarst sinter forged and Rarst 951 forged) and I'll use the 951 rods just for peace of mind.
So I'd want to use the rods I'd have anyways marked 944.103.110.0 RARST correct? These being 951 forged rods you think to be better.
08-02-2016, 11:36 AM
Question about RARST Rods
