Hey 4BT guys, how much vibration

[tk064]

I keep hearing from people not to use a 4bt, because they have too much vibration.



I have only talked to 2 people who have done a 4bt conversion and they are very happy with the engine. I would love some feedback either pro or con.



Thanks guys,



Tim

 

[philb4]

vibration

I think the word is buzzy. The vibration is not a problem untill about 1500rpm my drive train rattles as you accelerate through. 84 chevy dually 4sp 3. 73 rear.

 

[DSiemens]

Some engines may have counter rotating shafts used to counter vibration. This was an option in the 4bt because of the vibration.

 

[tk064]

Does your Chevy Dually's 4bt have the counterbalance shafts? and does the "buzz continue or does it phase out. Thanks,



Tim

 

[philb4]

buzzing

the buzzing I refer to is that I run at 3000rpm on the highway and any 4 cyl has a bit of a buzz. It sounds similar to my 51 mack which has a 855ci 6 cummins running at 2000 rpm. My engine has countershafts. The noise is not bothersome but thought you may want to be informed. I posted under 4bt performance which will tell you of the performance to expect. phil

 

[tk064]

Thanks for the information that is exactly what I am looking for. I take it that you would not "advise" someone not to buy a 4bt.



Thanks again



Tim

 

[philb4]

4bt future

I will use this engine in another project when it is time to sell the truck. However I will keep the empty weight to 3500lbs and use a 5sp trans.