Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Performance Chevy 305 (Don't hate me)
View Single Post
  #11 (permalink)  
Old 11-18-2012, 11:08 PM
F-BIRD'88's Avatar
F-BIRD'88 F-BIRD'88 is online now
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,750
Wiki Edits: 0

Thanks: 3
Thanked 348 Times in 345 Posts
Thats not a Mild cam" when used in a 305. It will have lame power below 3500+ rpm.
Will need a loose very high stall race converter and very high rear end gears.
Event the best of the 305 heads have very modest port flow in stock OEM form.
Don;t expect big power from this motor with stock non ported cylinder heads.
If you were to fully port the stock heads and use a better intake+ headers it would make some power

The engine will be a dog below 3500 rpm . No torque and won;t make the big power you think.

The compression ratio will not be even close to 11:1 without a domed 305 piston.
with a flat top 305 piston and .040" gasket and 54cc heads the cr will be almost 10:1
I hope you got some 4.56 gears an a 4000 stall race converter..

Good thing there are many more cams to choose from.
pick a much smaller camshaft that matches the vehicle, engine and purpose.

To get the 305 to idle with this big cam in it lock out the distributor mechanical advance system and set the locked fixed timing at 34-36deg BTDC, then plug the vacuum advance to the ported vac source on the carb. Big cammed motors need a lot lot of spark advance at idle to idle nice.
Otherwise it will cough spit, heat up, back fire and stall etc etc. 34-36deg locked timing at idle.

what is the Vehicle this motor is going into?

Last edited by F-BIRD'88; 11-18-2012 at 11:19 PM.
Reply With Quote