weight differance 351W vrs a 460 ?

Okay with both motors.having alum heads. How many more pounds os rhe.460 ?

there was a sticky on engine weights I think. Charlie is well versed in the weights as well

Larry Williams wrote:there was a sticky on engine weights I think. Charlie is well versed in the weights as well

thanks will look

First sticky in this forum...

now whats the weight of the 351W ?

got a chart on my wall on ford v8 weight it says 510 for a 351w and 640 for 429-460 thats with iron heads tho, the rest were 289-302 =460,boss 302 =500,351c =550,ford y block =625,ford FE (332-428) =650,ford FE 1959 (352)=670

How much more.rwhp would.I need for the. Added weight of the 557? Is it worth it? I got a great little 408w right now.
bigger is better? All women don't agree

2fox wrote:How much more.rwhp would.I need for the. Added weight of the 557? Is it worth it? I got a great little 408w right now.
bigger is better? All women don't agree

Is you Wife or GF driving your race car?

Lets see...... a typical decent built bracket engine ... Nothing fancy but good stuff 1.6 hp per CID

408 = 652.8 hp

557 = 891.2 hp

Is that answer enough? Do you think an extra 239 hp will make up for the extra 100#?

using a wallace formula

652hp @ 3000# = 9.69 @ 138

891hp @ 3100# = 8.83 @ 152

Hummmmm........

No the extra.weight would be from the big block Ford. My other car will be 500 pounds light too

The formula demonstrated the difference in weight from going with a typical 351W based fox to a 460 based fox. assumin a 100# weight difference between the two.

If.I can run 10.00 with my 408 with no Nos.in the lighter car. With a 250shot I might?do the 8.99 then that's al I need 18.99pass.then will get kicked.off the track.LOL.OS that possible.with my 408w
cause I really don't have 10k to burn. Right now.trying to pay home.off on 3 more..hers that's 13 years on 30 yr mortgage

2fox wrote:If.I can run 10.00 with my 408 with no Nos.in the lighter car. With a 250shot I might?do the 8.99 then that's al I need 18.99pass.then will get kicked.off the track.LOL.OS that possible.with my 408w
cause I really don't have 10k to burn. Right now.trying to pay home.off on 3 more..hers that's 13 years on 30 yr mortgage

That wasn't your question.......

Fact is the Typical Bracket 351 will only do it with NO2 and the BBF will do it N/A, even with the added weight.........

dfree383 wrote:

2fox wrote:If.I can run 10.00 with my 408 with no Nos.in the lighter car. With a 250shot I might?do the 8.99 then that's al I need 18.99pass.then will get kicked.off the track.LOL.OS that possible.with my 408w
cause I really don't have 10k to burn. Right now.trying to pay home.off on 3 more..hers that's 13 years on 30 yr mortgage

That wasn't your question.......

Fact is the Typical Bracket 351 will only do it with NO2 and the BBF will do it N/A, even with the added weight.........

at what Costs?

Maybe I need a 351W fourm instead? Gettting lots a static here.sorry for the incovence
BBF people.or not that nice I see BTW

2fox wrote:

dfree383 wrote:

2fox wrote:If.I can run 10.00 with my 408 with no Nos.in the lighter car. With a 250shot I might?do the 8.99 then that's al I need 18.99pass.then will get kicked.off the track.LOL.OS that possible.with my 408w
cause I really don't have 10k to burn. Right now.trying to pay home.off on 3 more..hers that's 13 years on 30 yr mortgage

That wasn't your question.......

Fact is the Typical Bracket 351 will only do it with NO2 and the BBF will do it N/A, even with the added weight.........

at what Costs?

What can you build a real 650hp NA 408 for that can handle a shot big enough to get you to 8.99 @ 3000#?

2fox wrote:Maybe I need a 351W fourm instead? Gettting lots a static here.sorry for the incovence
BBF people.or not that nice I see BTW

Why would you call advice based on experience "static"?

These "not that nice" BBF people have been putting up with my dumb questions for years.

For some more anecdotal evidence, 2 of my Fox Mustangs have similarly built motors. One is a rebuilt 302, mostly stock except for a cam, intake, and mildly ported stock heads. It went 97 mph in the quarter. The other is a rebuilt 460, mostly stock except for a cam, intake, and mildly ported stock heads. It went 115 in the quarter. The money for building both motors was within a couple hundred bucks of each other. The difference is 18 mph, and 8 mpg.


I am not a SBF hater. I just ordered a 408 W rotating assembly to put in my 67 Fastback. I want to drive the car with AOD and AC and be able to hear the radio. I don't want to twist the car in half. If I wanted to do that, I would order a 545 rotating assembly.

These guys are NOT giving you "static". It is possible that you just aren't getting the answers that you want.

I throw rocks at small blocks....

I throw rocks at small blocks....

Whats? I didn't get that?

Yes a.250 shot.if that don't do it then ill get.a.dart.big bore block use my crank rods get new pistons then go digger 600shot plus my 250 plate.system that should get me there.

I don't think a 557 10.9 motor with p51na is going to.do it?

2fox wrote:Yes a.250 shot.if that don't do it then ill get.a.dart.big bore block use my crank rods get new pistons then go digger 600shot plus my 250 plate.system that should get me there.

I don't think a 557 10.9 motor with p51na is going to.do it?

Your trying to compair apples to oranges......... Face it you want a small block because you have a bunch of parts..... so build one !!! If your starting from scratch a Big Block is the simplest solution to big numbers from a NA application.

^^^ I don't like ur profile.pic. you look like a friend of Hilters

2fox wrote:^^^ I don't like ur profile.pic. you look like a friend of Hilters

Maybe you need to go find a small block site......

and somebody else to help you.

2fox wrote:^^^ I don't like ur profile.pic. you look like a friend of Hilters

I've had NASTY small blocks, and once you do a big block it's not even a comparison. YOU WILL SPEND MORE $$$$ TRYING TO GO AS FAST WITH A SMALL BLOCK FACT.