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Old 08-26-2015, 04:46 AM   #15
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1978 28' Argosy 28
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Wow, those pictures represent a lot of work and creativity to get the lump out. Great work. That's some spectacular carnage. I'm also curious to know what kind of fuel delivery you've got planned for the new mill. Great job so far!
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Old 08-26-2015, 05:32 AM   #16
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looks like you had to unbolt the exhaust manifolds to get it out? Were they stock or did you have headers and whats your plans for that?

I had the stock manifolds. It may have come out with them on but I am installing a Banks power pack so I removed them for extra clearance.


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Old 08-26-2015, 05:38 AM   #17
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I am getting the 502 HO. I will be reusing my Quadrajet. Fuel injection was beyond my budget.

The LED headlights were a great addition. I can actually see at night now! I installed them and rewired the headlights with heavier wire and relays at the same time. Massive improvement in lighting.


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Old 08-26-2015, 07:24 AM   #18
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[QUOTE=Kota;1674985]I think a little JB weld on that piston and head and you'll be good to go!

Fixes everything doesn't it?
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Old 08-26-2015, 08:01 AM   #19
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looks like you had to unbolt the exhaust manifolds to get it out? Were they stock or did you have headers and whats your plans for that?
Peter, I think leaving the manifolds/headers on would make extraction a little (or more likely a lot) more difficult. I don't know that it would be impossible but the removal process involves continual raising and tilting of the engine while at the same time pulling it out the front. This is a difficult process when doing it yourself!

On any of these rigs that still have cast iron headers and if I was in the process of pulling the motor I'd get rid of the manifolds and replace them with a set of good quality headers. Headers definitely help reduce the amount of heat in the dog house among other benefits.

Brad
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Old 08-26-2015, 08:26 AM   #20
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I am getting the 502 HO. I will be reusing my Quadrajet. Fuel injection was beyond my budget.
Any idea what cam you're getting with the 502?

Quote:
The LED headlights were a great addition. I can actually see at night now! I installed them and rewired the headlights with heavier wire and relays at the same time. Massive improvement in lighting.
Care to share details of your LED installation?

Brad
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Old 08-26-2015, 08:45 AM   #21
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Care to share details of your LED installation?



Brad

Yes, please, what bulbs did you buy and where did you get them? Night driving is always sort of a roll of the dice for me.
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Old 08-26-2015, 10:59 AM   #22
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I expected questions on the headlights! Mine were horrible, the right low beam barely lit-a sickly yellow glow. I installed a Daniel Stern relay upgrade and the LED lights came from Amazon: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
The light on low beam is probably comparable to what my sealed beams should have been. The high beams are like daylight! They were expensive, but I could not drive with the old setup.
I was surprised after I installed them that on low beam, only the top 1/3 of the lights are on. If you look at them you can see the LEDs are in three rows. They look odd during the day but at night the light fills all of the reflectors and looks normal from the front when you get back about 30 feet. Up close you can see that just the top strip is on. When driving the light is good on low beam, nice white light, not bright enough to be offensive to others.
The high beams are remarkably bright, lighting well of the shoulders of the road. I am very happy with them.
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Old 08-26-2015, 11:11 AM   #23
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Any idea what cam you're getting with the 502?

I ordered the motor referenced by Hans 34.5 in post #12. The cam specs can be seen in the link.
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Old 08-26-2015, 11:20 AM   #24
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I agonized over the choice between the HT and HO. GM lists the torque stats at different RPMs making it hard to compare the two. I finally plotted the GM data on one graph. The HO has more low RPM torque, then the HT is slightly higher from about 2500 - 3200 RPM, then the HO is dramatically better after that. Both should be considerably better than my 80s 454. Click image for larger version

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Old 08-26-2015, 11:26 AM   #25
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With the small differences in the torque curves and the HO at 450 hp vs 377 hp for the HT, I thought the HO was a better value. The HT does not come with an intake manifold or water pump. By the time I added those items in the HT was more money.
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Old 08-26-2015, 01:13 PM   #26
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A dropped valve sure does create havoc ,
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Old 08-26-2015, 05:38 PM   #27
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I think the Quadrajet is not going to give you the fuel needed as it is.
Your going from what was it 280 hp to 450. You may know all this.
Keep a eye on the plug color. It's going to be a fun MO to drive.
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Old 08-26-2015, 06:03 PM   #28
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Quote:
Originally Posted by Hans 34.5 View Post
I think the Quadrajet is not going to give you the fuel needed as it is.
Your going from what was it 280 hp to 450. You may know all this.
Keep a eye on the plug color. It's going to be a fun MO to drive.
Airstream list the 454 at 230 hp stock. Given the age of the motor I'd be surprised if it was making 175hp just before she gave up the ghost.

That dropped valve must have made quite a racket for a couple of seconds.

Looking forward to seeing pics of the new 502 go in. Wow 450hp, I wonder what a 310 looks like with wheelie bars.

Cheers
Tony
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