Rajo head

Post by **ModelT46** » Mon Jul 18, 2022 12:52 pm

I have a rajo head I found 50 years ago. How do I tell what model? 4 or 8 valve? Have the manifold, but not tthe cover.

Post by **RajoRacer** » Mon Jul 18, 2022 1:10 pm

Post a photo if you can - they have several different port configurations - 4 valve is just that - 4 valves in the head & uses the stock exhaust valves in the block - 8 valve is 8 valves in the head.

Post by **ModelT46** » Mon Jul 18, 2022 1:25 pm

Thank you, I will check that out.

Kevin Pharis · Post by **Kevin Pharis** » Mon Jul 18, 2022 7:47 pm

If it weighs 80+ pounds... it’s an 8 valve. Pictures obviously will help, but a simple count of ports and note what side of the head they’re on will yield a solid answer. Also measure the combustion chamber depth and count the spark plugs while yur in there

Post by **got10carz** » Mon Jul 18, 2022 10:34 pm

If you bring it to NLNB I can look at it.

Post by **ModelT46** » Tue Jul 19, 2022 12:03 pm

it is an 8 valve head. looks good, adoes not seem to be rusty and is in good condition. The manifold is rusty, but should clean up okay. Do not havwe the cover. What model is it?

Post by **ModelT46** » Tue Jul 19, 2022 12:05 pm

What and were and when is The NLNB?

Post by **ModelT46** » Tue Jul 19, 2022 12:45 pm

I should have known. New London, New Brighton. I might be at New Brightopn on Saturday.

Post by **Rich Eagle** » Tue Jul 19, 2022 1:06 pm

I found some photos. The top 2 show the difference between the 8 and 4 valves. The 2 at left were called Model Cs but I don't think both are. Someone will be able to tell you more.

This thread has some good info including the last post by Mark Chaffin describing different models.
http://www.mtfca.com/discus/messages/41 ... 1408509225

Post by **DHort** » Tue Jul 19, 2022 2:37 pm

NLNB, New London to New Brighton car run. America's version of the London to Brighton car run in England. Only cars built 1908 and earlier are allowed to participate. Wednesday to Friday are practice runs, and you can purchase lunch and dinner in advance. The Saturday run is 120 miles from New London to New Brighton. Rob likes to be first in the big K.

www.antiquecarrun.org

Post by **ModelT46** » Tue Jul 19, 2022 2:55 pm

does someone have a photo of the manifold for an 8 valve head. The one I have is an all in one.

Post by **RajoRacer** » Tue Jul 19, 2022 3:04 pm

If all the ports are on the same side, it's not a B or BB.

Post by **ModelT46** » Tue Jul 19, 2022 3:23 pm

It seems to be a model 30. I am probably wrong that the manifold is an all in one. Will check this evening.

Post by **kmatt2** » Tue Jul 19, 2022 6:01 pm

The later Rajo Model 30 manifold is all in one, four exhaust and one intake port on the right side. The above Model 30 picture from early Rajo advertising shows a early type head with a different manifold .

Post by **ModelT46** » Tue Jul 19, 2022 7:02 pm

Thank you. I will check this evening and take some photos.

Post by **ModelT46** » Wed Jul 20, 2022 12:25 pm

It is a model 30. The manifold is similar to the illustrated one, but the intake manifold (Atached) is plain. I will post some photos.

Erik Barrett · Post by **Erik Barrett** » Wed Jul 20, 2022 1:06 pm

The model 30 is the lower performance end of the 8 valve Rajo lineup. They were commonly used on trucks, often called the commercial Rajo. While not as fast as the hotter heads, it will definitely boost performance and look just as cool on a model T as the others.

Post by **ModelT46** » Wed Jul 20, 2022 1:24 pm

Here are some photos. The head is in better condition that the photos show. the chambers are clean, the manifold is rusty, bt should clean up. I have the rest of the parts in a box (no rust on them). I have had this head for 60 years. I amy sell it, but I want to determine value. If I did sell i t, I would use the $$ for a new set of wheels for my 1910 touring. I have the correct hubs.

Post by **speedytinc** » Wed Jul 20, 2022 1:32 pm

Up on the shelf I have one of these that was modified. The cross over intake lump opposite the manifolds side has been machined for 2 carb mounts on either side of it. Quite the butchery of an original head, but sure to increase the head's performance. Smart thinking to bring the performance up on a commercial head.

Post by **ModelT46** » Thu Jul 21, 2022 12:55 pm

Doing the Elsworth Wis. swap meet this Sunday. After that I will take some time and clean up the head and manifold . I will get out the box of the rest of parts and photo all together.

Post by **ModelT46** » Mon Jul 25, 2022 1:46 pm

Wonderful nice day at Elsworth swap meet. Good sized crowd of friendly people. Sold lots of nice items. Good early Ford parts are not common at general swap meets any more. I brought nice items, so they sold well.

Dan McEachern · Post by **Dan McEachern** » Tue Jul 26, 2022 3:17 pm

Nice that the intake manifold extension is still on the manifold.. Most of those got lost along the way.

Post by **ModelT46** » Tue Jul 26, 2022 7:02 pm

I plan on putting it up for sale. I would rather have it picked up than ship. Is any one interested?

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