Is it true that stroked motors have limited reliability and longevity? Thanks

~fred

 

I don't know ask Shepard racing.

 

it all depends on the amount of abuse people put on them.. but for normal people like you and me to have a stroker no... most people that have strokers, really run the car hard.. so whether its stroked or not the abuse will wear anything out...

 

A stroked motor will probably have better components and better attention to detail while being built so I don't know what you mean being unreliable. Maybe its due to the fact that these motors are pushed harder with aggressive tuning/racing.

Nobody builds a stroker motor to get groceries and run around @ stock boost levels.

 

Well you can see it 2 ways. Many shops that sell them they back them up and the ones that dont back up the 2.0. Ok now when your dealing with a 2.2-2.4L this becomes a custom setup something that hasn't gone though extensive testing as a stock motor would go though. Now im not say that people that build these's setup's dont do testing yes they do if not they wouldnt put out the product. Like a few shops would say if it's done right you wont have any problems, If it's just put in without takeing the other setps needed to make it work proper it wont last. Bottom line if its not its facotry setup it wont work the way it should. The fastest evo's in the world are still 2.0L its not about the power its more about how your car will react in everyday driveing that including abuse. The best thing to do is before buying see what are your goal's what you want to do with the car and do some reasearch based on what you would like to be in the long run.

This is what i think and many shop owners that i know its your car, your mind do whatever you want. Good luck with your car......

 

would if be dumb to stock a motor and run stock turbo. i just want to rev to 9k. or will the turbo just not beable to hold it. but i dont see why not.

 

I don't know that they wear out any quicker but, like most people have already probably increased stress on the motor. Most peoeple with stroker will be running big boost which is hard on a motor. That with faster piston speeds from being stroked and I could see why they might not last.

Hi, Mike. Thanks for another little gem.

 

Probally because when you stroke the motor all it's purpose is to run 30PSI+ and live at redline.

 

You have to remember that when you increase the stroke, you also increase the rod angle. Rod angle is a very important aspect of engine design.

I do believe that when Chevy entered Trans Am racing, they destroked a 327 to a 302(correct me if I'm wrong). This allowed the engine to rev higher and last longer. YMMV

 

Destroking it decreases piston speed. That is what I believe lets engines rev higher not, so much the rod angle but, I could be wrong.

 

I didnt realize the 2.4 galant block in my evo is a custom setup. It comes straight out of one car into the next with the exception of rods and pistons, but those are changed on the 2.0 l as well. its a stock motor that doesnt need testing so I dont understand your point.

 

Longer strokes also result in the rod pressing against the wrist pin/piston at more of an angle, and thus the piston pressing against the cylinder wall more. However this only effects very long term reliability.

 

That is rod angle like AutoXer was talking about.

 

The small block started out as a 265/283 and was overstroked and overbored from there, all the way up to 400 cdi.

 

4.000" bore x3.000" stroke =302 CI and it was because Trans Am rules limited you to a max of 305 CI ,although they did rev up nice