D-RobIMW
www.imwtuned.com
- First Name
- Derek
- Joined
- Oct 15, 2017
- Threads
- 1
- Messages
- 379
- Reaction score
- 1,075
- Location
- Carlisle, PA
- Vehicle(s)
- 2017 Civic Si, 2019 Accord Sport 2.0T, 2001 Integra Type R, 2019 RDX A-Spec
- Thread starter
- #1
For anyone wondering if the different part number connecting rod the Civic Si engine got makes it any different, I ordered a "base" 1.5T rod and a Civic Si unit.
As far as my dial calipers can tell, they're dimensionally the same. The bushing for the wrist pin on the Si rod has a visibly smoother finish than the base model rod, but other than that, I don't see a difference. If I get real nitpicky, the color and sheen of the Si rod is SLIGHTLY different, but that may just be a result of the batch each rod was manufactured in.
There has been a handful of accounts of "base" 1.5T rod breakage, so I decided to have the material of each rod tested for hardness.
The results are:
Base = 22 HRC
Si = 28 HRC
The Civic Si rod is definitively harder on the Rockwell scale than the "base" 1.5T rod.
I would also like to note that the rod thickness is just 1.3mm thinner than a K20A2 "PRB" connecting rod at the thinnest parts.
I hope this comes in handy for everyone.
Thanks!
As far as my dial calipers can tell, they're dimensionally the same. The bushing for the wrist pin on the Si rod has a visibly smoother finish than the base model rod, but other than that, I don't see a difference. If I get real nitpicky, the color and sheen of the Si rod is SLIGHTLY different, but that may just be a result of the batch each rod was manufactured in.
There has been a handful of accounts of "base" 1.5T rod breakage, so I decided to have the material of each rod tested for hardness.
The results are:
Base = 22 HRC
Si = 28 HRC
The Civic Si rod is definitively harder on the Rockwell scale than the "base" 1.5T rod.
I would also like to note that the rod thickness is just 1.3mm thinner than a K20A2 "PRB" connecting rod at the thinnest parts.
I hope this comes in handy for everyone.
Thanks!