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Old 04-08-2002, 12:34   #1 (permalink)
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Handling of AV V8 possibly not as good as an AU V8?

I was doing a little poking around on the web and discovered the weight of an all-alloy 4.6 DOHC is around 60kg heavier than a 302W w/cast iron heads. Now assuming we are getting an alloy 5.4, that is obviously going to be even heavier.
Im guessing an AV XR8 could be as much as an extra 100Kg heavier at the front-end as an AU XR8?.

If the rumors are correct about the 5.4 that we are getting being redesigned, hopefully its gone on a huge diet, or we could be in for one hell of a nose heavy AV....


But this of course wont matter to the turboed half-dozen fans:s3
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Old 04-08-2002, 16:59   #2 (permalink)
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I seriously doubt that Uncle Geoff would allow a backwards step in the area of handling competency, an area which has seen the Ford IRS set as the benchmark of the local products.
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Old 04-08-2002, 17:03   #3 (permalink)
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Martin, would you have the link to that site?

Being all alloy engines they should be lighter.
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Old 04-08-2002, 17:32   #4 (permalink)
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Re: Handling of AV V8 possibly not as good as an AU V8?

Quote:
Originally posted by Martin
..Now assuming we are getting an alloy 5.4, that is obviously going to be even heavier (than a 4.6)...
Why would it be heavier?

Isn't it the same block but with bigger holes in it?
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Old 04-08-2002, 17:47   #5 (permalink)
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the all ls1 is lighter than the holden v8, i would have thought it would have gone the same way for the new av engine
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Old 04-08-2002, 17:55   #6 (permalink)
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yes, however reason LS1 stuck with OHV was for packaging and weight. OHV is lighter than OHC. In fact, the LS1 is a fantastic design for its purpose and its market.

Given how small and compact the 302W is, I would not be surprised to see a weight gain. Only time will tell.....
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Old 04-08-2002, 19:46   #7 (permalink)
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Raptor is nearly right - the only difference between 5.4 and 4.6 is stroke.

Weights as follows:

289/302 Older Models 208.6 Kg
351 Cleveland 249.5 Kg
351 Windsor 231.3 Kg
302 Late Models 204.1 Kg
Aus Spec early 302C 249.0 Kg

Modular 5.4 SOHC 272.0 Kg
Modular 5.4 DOHC 261.2 Kg

Note: The quad cams are lighter due to alloy heads.

So the answer (in simple terms) is that the engine is some 60Kg heavier - this is partly offset by the 22 Kg lower weight of the Tremec Gearbox over the T5. Consequently the weight gain is still about 40Kg assuming that there are no savings in other areas (ancilliaries etc.).
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Old 04-08-2002, 20:40   #8 (permalink)
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Quote:
Originally posted by russellw
Raptor is nearly right - the only difference between 5.4 and 4.6 is stroke.

You might want to mention those weight figures are for a 4.6L Modular not a 5.4.

As Im sorry to say the 5.4L is bigger, it has an extra 29mm of deck height. So lets say at best, all up it would be 20kg heavier than a 4.6 DOHC. SVT had to redesign the engine bay of the Cobra R so the 5.4L would fit, it could not be slotted in from underneith like the 4.6.

Plus the alloy heads on a 302W save 25Kg from memory, so I dont think my 100Kg guess is way off.....
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Old 04-08-2002, 20:54   #9 (permalink)
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You learn something new everyday.
So the 5.4 is a stroked 4.6 and not a bored one.
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Old 04-08-2002, 20:59   #10 (permalink)
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.. these are the official Ford weights for the 5.4 Martin - not that I am about to get into a debate about it. The bottom line is that there is an increase in weight which was your point to begin with.
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