swaping crankshafts 3x00 into 2.8l

[kanga19]

Need to know if it is possible to swap in a 3.1l or 3.4l crankshaft into a 2.8l. I have a 86 s-10 4x4 with a newly rebuilt 2.8l engine in it and would hate to waste the block if all i have to do is swap the crank to gain more power. Also do i need any thin special in order to do this swap(pistons, connecting rods, main bearings,connecting rod bearings, etc.

[Guest]

RE: swaping crankshafts 3x00 into 2.8l

You can swap cranks, but you will also need to swap pistons. Do some searchng through this site and you'lll find all the info about performing this operation.

[kanga19]

why do you have to swap the pistons whats the difference

[Guest]

Pin hight

[geoffinbc]

Make sure you are doing the swap with iron head pistons or you will have real low compression.

Since you have an 86 you will have an internal balance motor. So with the new crank you will need a neutral balance flywheel since all 3.1L cranks are internal balance.

[sharkey]

another thing to think about is the reluctor ring for the crank trigger on the 3.1l crank. it will hit the block if using a block that doesnt have the sensor.

[kanga19]

another thing to think about is the reluctor ring for the crank trigger on the 3.1l crank. it will hit the block if using a block that doesnt have the sensor.

Is there any 3.1 or 3.4l cranks that don't have a reluctor ring on them. if so what kind of vehicle am i going to have to rip it out of

[geoffinbc]

No it wont hit anything. All cranks after 88 had the reluctor ring. It will not hit the block. The reluctor ring is what gave the crank the mass required to make it internal balance.