Engine build Question.....

Go down

Engine build Question.....

Post  racinghabbit on August 1st 2014, 2:15 pm

If i had a 1968 ford 460 stock... Then offset ground the crank to a 514 cid., bumped up the compression to 10 to 1 with dish pistons and a set of 6.700 rods, but kept the stock heads on it....  say a mild cam 1500 to 5500 pulling 17 lbs of vacuum... matched valve springs....  Any idea on what kind of power you would gain..???? say for a daily driver

thanks...


Last edited by racinghabbit on August 3rd 2014, 8:43 pm; edited 1 time in total
avatar
racinghabbit

Posts : 499
Join date : 2011-07-12

View user profile

Back to top Go down

Re: Engine build Question.....

Post  samiam on August 1st 2014, 5:04 pm

if it's a 68 460, should be 10.5 on the compression
avatar
samiam

Posts : 219
Join date : 2011-12-20

View user profile

Back to top Go down

Re: Engine build Question.....

Post  racinghabbit on August 1st 2014, 5:24 pm

ok.. kinda want to know what kind of power it would make..? vs all stock...
avatar
racinghabbit

Posts : 499
Join date : 2011-07-12

View user profile

Back to top Go down

Re: Engine build Question.....

Post  maverick on August 1st 2014, 7:19 pm

The horsepower is in the heads (or airflow), so you'll probably see minimal hp gains if the heads are untouched. The stroke increase will probably gain you a little torque. You may gain a smidge of hp from the cam, but without optimizing the combo...not much. Your biggest gain will probably come from the fact that the engine is fresh.

My question: Why would a guy do all you've outlined...stroke, rods, pistons, springs, etc., and not touch the heads? Is this a class rule issue?
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3052
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Engine build Question.....

Post  c.evans on August 1st 2014, 9:15 pm

racinghabbit wrote:If i had a 1968 ford 460 stock... Then offset ground the crank to a 414 cid., bumped up the compression to 10 to 1 with dish pistons and a set of 6.700 rods, but kept the stock heads on it....  say a mild cam 1500 to 5500 pulling 17 lbs of vacuum... matched valve springs....  Any idea on what kind of power you would gain..???? say for a daily driver

thanks...

Why are you going backwards from a 460 to a 414? Of is this a typo?

Charlie

c.evans
BBF VENDOR SPONSOR
BBF VENDOR SPONSOR

Posts : 2209
Join date : 2008-12-03

View user profile

Back to top Go down

Re: Engine build Question.....

Post  maverick on August 1st 2014, 9:17 pm

I think he meant offset grinding the crank to 4.14".
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3052
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Engine build Question.....

Post  bbf-falcon on August 1st 2014, 9:25 pm

I was hoping thats what he meant.

bbf-falcon

Posts : 8992
Join date : 2008-12-03
Location : Jackson, Ohio

View user profile

Back to top Go down

Re: Engine build Question.....

Post  10.0 on August 1st 2014, 11:15 pm

If you can find any reasonbly priced gas to run it on the street at 10 to 1 comp.
10-1 comp and daily driver might have worked back in the 70s.

10.0

Posts : 46
Join date : 2011-04-23

View user profile

Back to top Go down

Re: Engine build Question.....

Post  maverick on August 2nd 2014, 8:12 am

racinghabbit wrote:If i had a 1968 ford 460 stock... Then offset ground the crank to a 414 cid., bumped up the compression to 10 to 1 with dish pistons and a set of 6.700 rods, but kept the stock heads on it....  say a mild cam 1500 to 5500 pulling 17 lbs of vacuum... matched valve springs....  Any idea on what kind of power you would gain..???? say for a daily driver

thanks...

Sounds like maybe 400 hp to me.
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3052
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Engine build Question.....

Post  racinghabbit on August 3rd 2014, 8:44 pm

514 is what i meant...... . but i want 500 hp on pump gas..
avatar
racinghabbit

Posts : 499
Join date : 2011-07-12

View user profile

Back to top Go down

Re: Engine build Question.....

Post  maverick on August 4th 2014, 7:42 pm

racinghabbit wrote:514 is what i meant...... . but i want 500 hp on pump gas..

If those heads are as cast, that may be a tall order. Spend a little time (or money) on them.
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3052
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum