305 crankshaft

jmoneyfoot · 01-07-2016, 02:28 PM

This is a 145hp 305 2bbl not a ton of power I just am wondering if a stock 305 crank will hold up or if I should use a steel 350 crank. Seems like everyone is trying to get the lightest crank possible. Im wanting to build a very compeditive R/SA but are finding out racers neet me dont like to talk about there combinations. Will a stock 305 crank go 7500+rpm?

Mike Pearson · 01-07-2016, 02:49 PM

Quote:

Originally Posted by jmoneyfoot

This is a 145hp 305 2bbl not a ton of power I just am wondering if a stock 305 crank will hold up or if I should use a steel 350 crank. Seems like everyone is trying to get the lightest crank possible. Im wanting to build a very compeditive R/SA but are finding out racers neet me dont like to talk about there combinations. Will a stock 305 crank go 7500+rpm?

It will hold up well. I have run cast cranks in super stock engines that rev to 8500 rpm with no failures. You might also think about using the factory 305 rods. They are lighter than the aftermarket rods and would be plenty strong for the application you are talking about. Resize and some new high strength bolts.

kansas stocker · 01-07-2016, 05:13 PM

I'll be more than a little shocked if your 305 2 barrel combination is a 7500+ package. If it is you need to be asking lots of lifter and spring questions.
Pete

MR DERBY CITY · 01-07-2016, 07:27 PM

Quote:

Originally Posted by kansas stocker

I'll be more than a little shocked if your 305 2 barrel combination is a 7500+ package. If it is you need to be asking lots of lifter and spring questions.
Pete

X2 Mr. Kansas.....if it turns 7500 then it is BAD AZZ

Signman · 01-07-2016, 05:13 PM

Removing weight from the center of rotation is not as important as reducing weight of components at the outside of rotation and that stop and start. Look at ways to reduce friction and windage losses.

Always listen to Billy!

01-07-2016, 02:28 PM	#1
jmoneyfoot Junior Member Join Date: Dec 2015 Location: waconia mn Posts: 92 Likes: 21 Liked 9 Times in 5 Posts	Re: 305 crankshaft This is a 145hp 305 2bbl not a ton of power I just am wondering if a stock 305 crank will hold up or if I should use a steel 350 crank. Seems like everyone is trying to get the lightest crank possible. Im wanting to build a very compeditive R/SA but are finding out racers neet me dont like to talk about there combinations. Will a stock 305 crank go 7500+rpm?

01-07-2016, 05:13 PM	#3
kansas stocker Member Join Date: Oct 2002 Location: kansas Posts: 235 Likes: 502 Liked 249 Times in 48 Posts	Re: 305 crankshaft I'll be more than a little shocked if your 305 2 barrel combination is a 7500+ package. If it is you need to be asking lots of lifter and spring questions. Pete

01-07-2016, 05:13 PM	#5
Signman Senior Member Join Date: Oct 2003 Location: Lower Slower Delaware Posts: 535 Likes: 22 Liked 269 Times in 99 Posts	Re: 305 crankshaft Removing weight from the center of rotation is not as important as reducing weight of components at the outside of rotation and that stop and start. Look at ways to reduce friction and windage losses. Always listen to Billy! __________________ Frank Ferrucci I/SA 1271 "Be Thankful for the Gifts You are Given"