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Technical => Engine Tech Forum => Topic started by: 64baja on May 17, 2008, 10:06:57 AM

Title: stroker crank on 1641?
Post by: 64baja on May 17, 2008, 10:06:57 AM

A tech question:

What would be the benefits of putting a stroker crank in a 1641?  I have a friend who has suggested this as an great idea.  Also how would you compensate the piston rod and shim height doing this?  Does it warrent the effort in only a 1641?  I have read lots of people do this in larger motors.

Thanks for the help.

Title: Re: stroker crank on 1641?
Post by: Chris on May 17, 2008, 12:51:11 PM

its not a 1641 after you stroke it.....

Title: Re: stroker crank on 1641?
Post by: egspot on May 18, 2008, 09:02:27 AM

Not to take the wind from your wings (wow that rimes)

For what it is worth;

 I think it would be an experiment (probably done before)to stroke with 87. mm and a 76mm crank would get you something like an 1807cc. I understand that 74mm and 76mm cranks require you to use some spacers and some people discouraged me from going that route when i was planning my motor.Since you are opening the block and having it checked, it would make more sence to get 90.5mm (I have some f/s) or 94mm and get the block prep for it.

Title: Re: stroker crank on 1641?
Post by: 64baja on May 18, 2008, 08:21:00 PM

Thanks, sounds like a dumb question when asking it.  I have been trying to figure out crank specs 69, 74, 78, 82 ect.  I had done some reading and think I got an overview of it.  I have read in the vw magasines that the 1915 is an awesome motor. Probably sounds like a great way to go some time in the future.  I have  a dp with a power pulley, dual carbs on it with a port and polish.  I moves compared to my 1500 sp.  A good step up.  One day I will move the next step up.  Thanks for the help.

Title: Re: stroker crank on 1641?
Post by: GMB on May 26, 2008, 10:57:47 AM

You could just take it apart and add a 74 crank and special cam (PM me) and it will make a 1760cc. The CB mileage motor is built that way and would be an easy way for you to get a bigger engine and do it in a weekend yourself.
    Gary.

Title: Re: stroker crank on 1641?
Post by: 64baja on May 27, 2008, 07:21:11 PM

Question on that.  I have the engle 100 in my car now.  1641 dp.  New motor rebuild with 5000 miles on it.  I like it but I have this friend who is a machinest and is big on me putting the stroker crank in it.  Can I use the engle 100 with a 74 crank?  Would a larger crank be better ie 78 or will it not run properly.  This would be a simple cost effective approach if it all fit together.  I am sure I would love the extra hp.  I bought this motor used so either it gets sold and I start over or I use this motor and balance, port and polish with the stoker.  Any thougths on the crank?  Engle 100 a good blend with the stroker crank?  I have a set of 34 pic dual carbs on it now could I use them.  They are the spainish ones.

Thanks again for the help.

Paul

Title: Re: stroker crank on 1641?
Post by: egspot on May 28, 2008, 06:14:05 AM

You are getting involved.

Where you can go depends of what you want from the new engine. However, I think you can go up to 76mm before you have to get stroker pistons ( "B" pistons) Since you are oppening the case, you can change anything you want and the only limit will be your wallet.