weld and regrind crank?
06-04-2010, 11:24 AM
#11
While it is perfectly acceptable to weld and offset grind a crank to gain a little extra stroke, it is/was mainly done because there was not an inexpensive alternative for a good deal of the motors that people choose to build. Anything relatively modern and Chevrolet in particular have plenty of options for cranks as to where I believe the amount of effort and risk is not worth it, especially when you can most likely get a stronger crank for less money than you would spend reworking a stock piece. Also, it was usually common for folks to work towards a ¼” stroke or so, and not quite a large jump all the way to a 4” stroke. I’m going to side with all the other guy’s and say, why not just buy one of the readily available cranks out there?
06-04-2010, 11:26 AM
#12
I doubt that it can be done. Plus you would have a lot of time and labor in doing so. If you are trying to re-work a cast crank....I would not waist the time, not where there are Forged cranks you can replace it with. We have a budget 5140 forged crank starting as low as 544.00! I am not trying to push product, but you would be wasting a lot of time and money.
To go from 3.622 to 4 is alot of welding. It could be done but in the end its alot of work to build it up that much and re grind it. Also its still a cast crank in the end. By welding it that much you may also comprmise it structral integrety... something to consider...Best of luck with your projects!
06-04-2010, 07:12 PM
#13
Well here I go, eating my words again. I didn't think it was even possible to weld a cast steel crank. I know it's not like welding cast iron, it just seems like the area near the weld would be crack prone.
I have to agree with 1FastBrick. My analogy of the day is that it is kind of like re-using guitar strings.
I have to agree with 1FastBrick. My analogy of the day is that it is kind of like re-using guitar strings.
06-04-2010, 07:19 PM
#14
While it is perfectly acceptable to weld and offset grind a crank to gain a little extra stroke, it is/was mainly done because there was not an inexpensive alternative for a good deal of the motors that people choose to build. Anything relatively modern and Chevrolet in particular have plenty of options for cranks as to where I believe the amount of effort and risk is not worth it, especially when you can most likely get a stronger crank for less money than you would spend reworking a stock piece. Also, it was usually common for folks to work towards a ¼” stroke or so, and not quite a large jump all the way to a 4” stroke. I’m going to side with all the other guy’s and say, why not just buy one of the readily available cranks out there?
Originally Posted by 1FastBrick
To go from 3.622 to 4 is alot of welding. It could be done but in the end its alot of work to build it up that much and re grind it. Also its still a cast crank in the end. By welding it that much you may also comprmise it structral integrety... something to consider...
Best of luck with your projects!
Best of luck with your projects!
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