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Author Topic: Weight Difference 5.0L vs 5.8L  (Read 1221 times)
Chickenbone
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« on: March 15, 2017, 12:59:25 pm »

Has anybody weighed a stock iron headed (E6 or E7) 5.0L?  And also an E7 headed 5.8L?  Has anybody weighed their engines with aftermarket heads and intake?  If I am replacing my iron 5.0L with a 5.8L with aluminum heads (assuming the stock HO intake weighs the same as the Holley Systemax and the TFS Box-R intake), how much am I increasing the weight by?  Just curious as to whether I am putting on any weight with lighter components.

Chickenbone 
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juiced coupe
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« Reply #1 on: March 15, 2017, 01:36:16 pm »

http://raceabilene.com/kelly/hotrod/engine.html

Should be a good reference point.
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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

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I honestly don't get it.

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knucklefux
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« Reply #2 on: March 15, 2017, 02:22:43 pm »

You're going to gain some weight.  How much?  Going from an all iron 302 to an aluminum top ended 351 will probably go up 40ish lbs.

That weight gain can easily be offset by building a 408 out of the 351.  If you're going to keep the 351 displacement, you'd be better off stroking the 302 to a 347.

Or go with a 460 based stroker and gain another 50ish lbs and be able to put down 800hp 
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Chickenbone
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« Reply #3 on: March 15, 2017, 03:20:05 pm »

If it were my car, then I would have gone the 408W hi-port head solid roller cam route, but this is not my car, so I kept it conservative.  I've been trolling this site for a few years, so I was convinced that I should put better parts on the 351W since I was going to be taking the car apart anyways.  Now I have to wait for this weather to break so I can get this car back together and see if the 351W added any weight.
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Chickenbone
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« Reply #4 on: March 15, 2017, 03:30:01 pm »

http://raceabilene.com/kelly/hotrod/engine.html

Should be a good reference point.

Interesting.  I probably should have weighed the TFS heads and E7 heads.  According to that link, iron headed 302 is 460lbs vs iron headed 351W at 525lbs.  Going by what I felt, the TFS heads were significantly lighter than the E7s.  I could pick both up without issue.  The E7s, although not in a box, I could only do 1 at a time (I'm not built obviously).  Should be interesting to see once I get that 351W in the car.
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gmatt9858
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« Reply #5 on: March 15, 2017, 05:27:12 pm »

A thread over on the corral. They're saying around 52lbs each complete for the E7s.
http://forums.corral.net/forums/5-0-5-8-engine-tech/308036-how-much-does-one-e7-weigh.html
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88DragStang
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« Reply #6 on: March 16, 2017, 06:01:57 am »

i weighed my e5 heads with rockers and they were a tad under 59 lbs
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