Small/Big Block Weight Difference.

Sgt.5point0

Member

Jul 26, 2003

258

0

16

Rapid City, South Dakota

Jun 30, 2005

#1

• Jun 30, 2005

• #1

I'm getting a new engine next spring and I'm trying to decide between a 408 and a 533. The 533 makes 100hp/145lbs more than the 408, but is it worth the addition in weight? Is there a big difference? Also these engines are the same price, so dont take that into account.

 

Sgt.5point0

Member

Jul 26, 2003

258

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16

Rapid City, South Dakota

Jun 30, 2005

#2

• Jun 30, 2005

• #2

Nobody knows?

 

Dark Knight

Founding Member

Feb 1, 2000

2,578

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Chandler, Az.

Jul 1, 2005

#3

• Jul 1, 2005

• #3

460# for a 302, add another 40 or so if it's FI
720# for a 429-460
625# for an FE based engine..

big block all the way.. you can get way more HP.. I'm looking at about 800HP out of my 557..

 

Modular2v

Founding Member

Jun 30, 2002

3,222

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99

oklahoma

Jul 1, 2005

#4

• Jul 1, 2005

• #4

Dark Knight said:

460# for a 302, add another 40 or so if it's FI
720# for a 429-460
625# for an FE based engine..

Click to expand...

this also depends on a number of factors...ex: aluminum block and heads etc... my dads FE motor weighs the same as my 331

 

T

tjm73

Founding Member

Aug 3, 2000

2,418

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48

Rush, NY

Jul 1, 2005

#5

• Jul 1, 2005

• #5

IMO.... 100 hp/145 lbs-ft will erase any difference in weight. The 385 series big blocks are thin wall castings. The iron block SOHC/DOHC 4.6's weigh almost as much as a 460.

Both engine's fit easy. But obviously require specific swap parts.

 

Sgt.5point0

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Jul 26, 2003

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Rapid City, South Dakota

Jul 1, 2005

#6

• Jul 1, 2005

• #6

Both engines come with aluminum heads. The 408 would be carbed.