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?

 

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

Figure 500 or more for the crank work

 

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

 

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

 

thanks ...

 

where? I paid like 275

 

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.

 

just buy a forged, lightweight crank.

 

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

 

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