Q: Connector rod vs compression ratio

asked by on

does connecting rod length have an effect on compression ratio?

The short answer would be yes, the connecting rod does have a direct affect on the compression ratio. For example, if you were to use a shorter connecting rod in a given engine when doing a rebuild, a piston manufacturer would suggest a piston design that has the connecting rod pin located lower on the skirt, in order to maintain the same compression ratio. If a longer rod were being used, than what was removed, the piston design would have the pin location closer to the top of the piston, closer to the rings. Of course, there are limitations when making these kinds of modifications. Piston designers will take into account the skirt design, piston ring layout, and several other factors. There are several good technical articles that can be found by companies such as Callies, GRP, Sealed Power, TRW, Arias, Wiseco, and many more.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Connector rod vs compression ratio

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine stalls and now won’t start up

Unfortunately an engine can really fail at any time for any number of reasons regardless of what year or how many miles it has on it, but it for sure isn’t normal. Toyota has a number of things that can...

Q: Excessive oil consumption

The manufacturer says that if you are using 1 quart per 1000 miles, then this is considered okay and is normal in their eyes. The problem is you will not have any recourse if this is what you are using....

Q: Engine smokes after an oil change

Yes, on a lot of vehicles it is normal. When you change your oil, a lot of times oil will drip off the oil filter when you take it off and get on the exhaust manifold and on the engine....

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.