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Super Red Diamond RD450 gasser

Moderator: Mod Squad

Firepower354
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Posts: 172
Joined: Sun Jun 19, 2011 10:35 pm
Location: Flint, MI
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Super Red Diamond RD450 gasser

Post #1 by Firepower354 » Sun Feb 15, 2015 4:55 pm

I've been wanting an even bigger six, when I found this local.
Bottom end and valve gear is great. Sleeves (replaceable) and likely slugs are shot. A couple valve stems are sticky.
If the pistons can't be cleaned-up and coated back to stock size by Swain Tech, I could leave the sleeves out and run 4.5-4.6" pistons instead of the 4.375 stockers.

https://fbcdn-sphotos-g-a.akamaihd.net/ ... a32899522a

https://scontent-ord.xx.fbcdn.net/hphot ... e=55490B57

https://scontent-ord.xx.fbcdn.net/hphot ... e=559005D5

https://fbcdn-sphotos-b-a.akamaihd.net/ ... 18017ec24b

https://scontent-ord.xx.fbcdn.net/hphot ... e=555D2ED9
It gets 10MPG, but goes up to 14 if I lie.


Lazy JW
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Posts: 5559
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Location: Careywood, Idaho

Re: Super Red Diamond RD450 gasser

Post #3 by Lazy JW » Sat May 02, 2015 8:45 am

I like it! :D 8) :thumbup:
"The White OX" 1974 F-350 300-6, Stock single exhaust, Carter YF, T-18A, Dana70 w/4.11, Flatbed dually w/dump bed. "Where no oxen are, the crib is clean, but much increase is by the strength of the ox" (Proverbs 14:4)
Image

flatford6
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Posts: 187
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Location: Gilroy, California

Re: Super Red Diamond RD450 gasser

Post #4 by flatford6 » Sun May 24, 2015 1:03 am

An even bigger International six in the same engine family: The RD 501. 4.5" bore without sleeves and 5.25" stroke with four barrel carb. I had one in an old IH ten wheeler and it had a significant power increase over the RD 450 it replaced. Rated horsepower at 3000; 215 from 1966 to 1972. Engine weight very heavy, estimated 1000 lb.

Firepower354
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Posts: 172
Joined: Sun Jun 19, 2011 10:35 pm
Location: Flint, MI
Contact:

Re: Super Red Diamond RD450 gasser

Post #5 by Firepower354 » Sun May 24, 2015 9:56 pm

flatford6 wrote:An even bigger International six in the same engine family: The RD 501. 4.5" bore without sleeves and 5.25" stroke with four barrel carb. I had one in an old IH ten wheeler and it had a significant power increase over the RD 450 it replaced. Rated horsepower at 3000; 215 from 1966 to 1972. Engine weight very heavy, estimated 1000 lb.



Yep. Old-timers seem to mention the rarity and fragile nature of the 501, plus the more difficult rebuild, unique timing set.

A couple ideas I'm mulling:
4.600 BBC pistons on custom rods, and offset grind the crank to BBC journal size and 5.5" stroke, I'll have a much lighter rotating assembly and 548 cubic inches.

501 pistons in the de-linered block, 477 cubes. Rare slugs. 534 pistons may be a decent option, still spendy.

Re-sleeve and use my old slugs, after blast and coatings, turbo with a Cat unit I have.

The manifold pad seems to be able to be machined for a 4v, but there are some nice flats on the runners to add a couple more 2v carbs and keep the looks, or build a simple tubing one, or pick up a 2x1 Ellis from eBay. They pop up often but seem to be mostly for the smaller port head. Mine has the 2.25 intake valves and 2" ports.

https://scontent-iad3-1.xx.fbcdn.net/hp ... e=5601DFD0

https://scontent-iad3-1.xx.fbcdn.net/hp ... e=55FB2638

Mine is like this. I thought of ditching stock intake, looping the exhaust outlets together, running turbo on the former heat-riser pad, building a logifold
https://scontent-iad3-1.xx.fbcdn.net/hp ... e=560433A1
It gets 10MPG, but goes up to 14 if I lie.

Firepower354
Registered User
Posts: 172
Joined: Sun Jun 19, 2011 10:35 pm
Location: Flint, MI
Contact:

Re: Super Red Diamond RD450 gasser

Post #6 by Firepower354 » Tue Dec 27, 2016 11:00 pm

Sitting next to a 292, ready to get sonic tested, as soon as I get help loading the big gals.

Image
It gets 10MPG, but goes up to 14 if I lie.

sdiesel
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Joined: Fri Jan 06, 2012 12:33 am
Location: NW Oregon,Buxton currently

Re: Super Red Diamond RD450 gasser

Post #7 by sdiesel » Mon Dec 31, 2018 12:26 am

does any one know how this turned out?
a long love affair with the 300 six.
my lastest and final fling is a fresh 300 in an 88 ford f350 dually 4X flatbed

Firepower354
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Posts: 172
Joined: Sun Jun 19, 2011 10:35 pm
Location: Flint, MI
Contact:

Re: Super Red Diamond RD450 gasser

Post #8 by Firepower354 » Thu Feb 21, 2019 11:05 am

Image Image Image Image Image Image Image Image Image Image
It gets 10MPG, but goes up to 14 if I lie.

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