Balancing and lightening the crank shaft???
 

ok im building a D over winter and im thinking about having my crank shaft lightened and balanced but i have a few questions....lightening the crank will make higher rpms more achieveable but will it weaken the actual crank itself im shooting for 400hp will it be able to with stand the pressure along with revving out to about 8500? and what should the minimum weight be ?...also how much does something like this run at the machine shop?

Re: Balancing and lightening the crank shaft???
 

if you have to ask, you can't afford it :)

Figure 500 or more for the crank work

Re: Balancing and lightening the crank shaft???
 

just balance it, i don't believe turbo motors need lightened cranks; least i don't believe in it.

Re: Balancing and lightening the crank shaft???
 

Get a good balance and polish. That only costs like $50-$100.

Re: Balancing and lightening the crank shaft???
 

thanks ...

Re: Balancing and lightening the crank shaft???
 

where? I paid like 275 :X

Re: Balancing and lightening the crank shaft???
 

Yay CO! I paid $100 for balancing of all my bottom end parts(crank, flywheel, pulley,pistons,rods,clutch,pressure plate) all balanced to themselves, then eachother. Then I paid $50 for a poslish/magging(check for cracks),check for straightness.

Re: Balancing and lightening the crank shaft???
 

just buy a forged, lightweight crank.

Re: Balancing and lightening the crank shaft???
 

thats $1500-2000 since none are made, nor needed :)

Re: Balancing and lightening the crank shaft???
 

well i'll look into it i was thinking about having it done but if it cost more than a aftermarket 1 then i was just going to buy 1 of those///anyway i think im just going to have it balanced and see what happens