Mustang Refresh Spotted; Camo'ed Though
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Joined: Mar 2001
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From: TX Med Ctr
[QUOTE=bossco;4792110]
I suppose that isn't only sllightly surprising if you are talking all aluminum 4.6L 3V. How much does the iron block truck motor weigh, just out of curiosity?
and on that weight thing, a fully dressed 4.6 3v V8 weighs 420 lbs compared to the fully dressed engine weight of the LS3 of 440 pounds. Although you can still rag on the 4v engines which I figure to be about 80 pounds heavier (all of it cylinder head) and on that price thing Ford suggested retail price for the 3v 4.6 is 6,700.00 GM's suggested retail price is 7,900 for the LS3
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Joined: Nov 1998
Posts: 3,252
From: Knoxville, TN
[QUOTE=bossco;4792110]
Won't argue with that - but why does GM and Ford use Aluminum blocks in their performance cars these days (GT500 aside)?
Simple - to save weight, because weight is a major factor in a performance car.
Ok. No issues here.
Boy, we're worlds apart here.
If being adamant about "power density" means that I want my 300 HP engine to weigh less than yours, or I want my 400 lb engine to make 400 HP instead of 300 HP, or if I want to more room to work on my 300 HP engine than you have to work on your 300 HP engine, or if my 300 HP engine is much less complicated than your 300 HP engine, then color me guilty.
And the S197 would be far faster with a motor like the LS1, LS2, or LS3 vice its current 3V 4.6.
I cannot and will not dispute your numbers, but I have been unable to find a weight for the 4.6 3V. Could you please cite your source and provide a link?
Hmmm.....130 HP for $1200? Sounds like a pretty good deal to me.
Bob
Isn't the LS2 364 ci...
Do all GM trucks now come equipped with aluminum blocks? Thats the majority of Ford's iron block business, and using an iron block is not an inherantly inferior technology, iron is by far a much better cylinder block material than aluminum from a great many standpoints unless your solely concerned about weight, although a CGI block might pare that down too.
Do all GM trucks now come equipped with aluminum blocks? Thats the majority of Ford's iron block business, and using an iron block is not an inherantly inferior technology, iron is by far a much better cylinder block material than aluminum from a great many standpoints unless your solely concerned about weight, although a CGI block might pare that down too.
Simple - to save weight, because weight is a major factor in a performance car.
Ford's mod blocks are pretty hi-tech too, features similar technology to the LSx engines (Y- block, cross bolted mains, crank driven oil pump, windowed mains to equalize crank pressures - atl east some of the cobra blocks I've seen).
Now if you guys wanna get all snobby, just stick to cylinder heads, I'll bow my hat to you. Otherwise I'll be as adamant on my position about Ford MOD blocks as Bob is about "power density" (a metric I really find useless when mentioned with the S-197 cars since they were designed to fit the engines, both tall and short deck from the get go).
Power density is useful if say, your gonna shoehorn an engine into a gocart.
Power density is useful if say, your gonna shoehorn an engine into a gocart.
If being adamant about "power density" means that I want my 300 HP engine to weigh less than yours, or I want my 400 lb engine to make 400 HP instead of 300 HP, or if I want to more room to work on my 300 HP engine than you have to work on your 300 HP engine, or if my 300 HP engine is much less complicated than your 300 HP engine, then color me guilty.
And the S197 would be far faster with a motor like the LS1, LS2, or LS3 vice its current 3V 4.6.
and on that weight thing, a fully dressed 4.6 3v V8 weighs 420 lbs compared to the fully dressed engine weight of the LS3 of 440 pounds. Although you can still rag on the 4v engines which I figure to be about 80 pounds heavier (all of it cylinder head)
and on that price thing Ford suggested retail price for the 3v 4.6 is 6,700.00 GM's suggested retail price is 7,900 for the LS3
Bob
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From: SeVa
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Joined: Jun 2004
Posts: 2,977
From: SeVa
[QUOTE=HAZ-Matt;4792998] Probably about 540 pounds or there about, the 5.4 iron block itself is 115 pounds heavier than the 3v 4.6 aluminum block.
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Joined: Mar 2001
Posts: 13,713
From: The Golden State
Yeah it took me a bit, but I stumbled onto it at FRRP's website, its listed on page 67 (http://www.fordracingparts.com/downl...gs/2007-pp.pdf) of the FRRP Parts book, in a sidebar next to the dimensions picture of a terminator 4.6.
So, now we know that the Mustang is carrying less weight up front than any LSx powered GM car, despite the size of the engine.
Couple of remarkable items:
* The 5.4 blocks weigh 45 lbs more than the 4.6.
* It's surprizing how low the blower sits in the Cobra. It looks no taller than a regular manifold.
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