383 or 406 sbc
#1
Junior Member
SHOW GUEST
Thread Starter
Join Date: Dec 2011
Posts: 3
383 or 406 sbc
a guy around my way has two blocks that have been through the necessary machining and reassembled what im asking is what would most of you racers go with the 383 is a fresh 30 over 350 block with a 400 cast crank external balanced with 400 rods forged flat top pistons
and the 406 2 bolt block cast crank 10-10 5,7 rods cast flat top pistons decked .10 both for around the same price would really love to have some help with this guys
and the 406 2 bolt block cast crank 10-10 5,7 rods cast flat top pistons decked .10 both for around the same price would really love to have some help with this guys
#4
Senior Member
RACING JUNKIE
Join Date: Nov 2008
Location: Niagara Falls, NY
Posts: 965
Re: 383 or 406 sbc
Originally Posted by cs89chevy
a guy around my way has two blocks that have been through the necessary machining and reassembled what im asking is what would most of you racers go with the 383 is a fresh 30 over 350 block with a 400 cast crank external balanced with 400 rods forged flat top pistons
and the 406 2 bolt block cast crank 10-10 5,7 rods cast flat top pistons decked .10 both for around the same price would really love to have some help with this guys
and the 406 2 bolt block cast crank 10-10 5,7 rods cast flat top pistons decked .10 both for around the same price would really love to have some help with this guys
#5
Senior Member
RACING JUNKIE
Join Date: Mar 2008
Location: falkville al
Posts: 1,764
guys i know it should be forged all the way. but ive built engines with cast cranks and cast pistons for yrs and ive only had a few come apart. and when they did they were gettin old.ive left the line around 7000 a few times and missed shifts(cheap shifter) and watch my 12,000 grand tach say 10,000 and still drove it up on the trailer to go home. but ive also sweep up a few ponds of metal for the trash man too. but mostly they stay together. dont ask me how but its true.ive run 13.1 pistons on a cast crank.stayed together. that did come apart one day when we decided to put the juice to it and it had a tunnelram on it so we gave it a little to much i quess,cause thats one of the ones i swept up..lol should never smoke pot and think about cars.ever lol.. but i was young so what the hell it was only money and metal!!!!!!!! and a whole lot of fun!!!!!!!!!
#6
Senior Member
RACING JUNKIE
Join Date: Nov 2008
Location: Niagara Falls, NY
Posts: 965
Originally Posted by outlaw256
guys i know it should be forged all the way. but ive built engines with cast cranks and cast pistons for yrs and ive only had a few come apart. and when they did they were gettin old.ive left the line around 7000 a few times and missed shifts(cheap shifter) and watch my 12,000 grand tach say 10,000 and still drove it up on the trailer to go home. but ive also sweep up a few ponds of metal for the trash man too. but mostly they stay together. dont ask me how but its true.ive run 13.1 pistons on a cast crank.stayed together. that did come apart one day when we decided to put the juice to it and it had a tunnelram on it so we gave it a little to much i quess,cause thats one of the ones i swept up..lol should never smoke pot and think about cars.ever lol.. but i was young so what the hell it was only money and metal!!!!!!!! and a whole lot of fun!!!!!!!!!
#8
Senior Member
EXPERT BUILDER
Join Date: Dec 2010
Posts: 345
I ran a 406 back in the mid 80s with a cast crank and 305 rods forged 12.5 pistons ( i did not build it) and it turn 8300 every pass 10.40s in 2600lb car 5.13gears for two years. I put the spray to it a few times and after a few times of that it ran slower on motor so when i pulled it down i found three bent rods. I think if you have a good balanced engine and turn it with in reason it will hang in there. I have ran both engines and had good luck and alot of fun.
Its all in what he plains on doing, really need more info!
Its all in what he plains on doing, really need more info!
#9
Senior Member
RACING JUNKIE
Join Date: Mar 2006
Location: EUGENE,OR.
Posts: 3,391
I love both stories (wazup & fastvega) about the budget motors & cast bottom ends (and stock 305 rods) in motors running in the 10's & spinning 7K to 8300... that is awesome!! Gives us hope & courage to build on a budget with results!! Of coarse- like wazup says within reason & balanced well.
#10
Senior Member
RACING JUNKIE
Join Date: Nov 2008
Location: Niagara Falls, NY
Posts: 965
Originally Posted by Rigsby
I love both stories (wazup & fastvega) about the budget motors & cast bottom ends (and stock 305 rods) in motors running in the 10's & spinning 7K to 8300... that is awesome!! Gives us hope & courage to build on a budget with results!! Of coarse- like wazup says within reason & balanced well.