Inliners International Forums General Discussion AMC/JEEP Hudson 202 engine

Have recently acquired a Hudson Jet. It has the 202 in it. I had considered going with the 308 motor because it was a common thing to do in the late 60's and 70's. I have decided to stay with the 202. Does anyone in inline land have any experience with these motors. I have already done the 308 thing and was wondering if these motors had any special things that might be different. Any information would be appreciated. Also would be interested in parts for this motor. Thanks

I know nothing about Hudsons but I do have a 1972 Clifford Hudson catalog. On the first page it says that the 202 is 4" shorter than the other engines and because of that no parts interchange except lifters. The only other mention in 15 pages of Hudson parts and information of the 202 is a listing for a rear main seal. They made 104 hp with one carb and 114 with two.
Bore: 3" Stroke: 4 3/4" Cop. 7.5 w/iron head 8.0 w/aluminum head
valves 1.5" int. 1.395" exh. gross cam lift .356

tesr post

having trouble postine for some reason

The 202 was the last engine from Hudson. It was a destroked 8 with 2 cylinders chopped off.

The 254 L8 is 3.00" × 4.50", a B&S that doesn't exist in the L6 engines.
That's a bit of exaggeration.
The block and head will resemble the L8 parent, but the crank will be very different.

114 hp from a 200" naturally aspirated stock flathead six is something to think about. With a 4 3/4 stroke I'd like to see some torque numbers. How many mains? How many ports? If the rods are as stout as their other 6s they will do. Will it take a turbo? Cam, shaved head, TBI or a few Webers, headers, HEI, bigger valves? I think it would be fun to build. It might need a lighter car. Maybe a white one.

"Where there is a will..." Just look at all the amazing stuff the Model A crowd has done with the "B" motor and its 200 inches too and probably some 30 years older, and of similar stroke (at 4.75"-its more like an orbit, rather than a stroke). They got one piece main seals, full pressure lube, homemade ohv conversions etc. You would think the sailboat motor would have a head start in compression, and some proven race proved durability. man, put it in a bucket Tee!

We've got a Will around here, he's our president.He drives an old yellow Chevy.

Thanks for all of the replys. The car is a 2700lb. Jet. It is a 4 main block. Same size as the big blocks. Rods journals are a little smaller, just under 2in. They still used Atlas rods. I have a pic of a red Jet that supposely was Ike Smith's. The lettering on the side said it was a record holder. It also had 202 on the side. One gentleman I had PM's with said he thought it was really 308 car. The 55-56 Hash Wasp rated the motor with twin-h at 124hp. The Hash Wasp was a lot bigger car and the little motor had a hard time with it. I would like to have one of those motors. If anyone has any leads Please let me know. For some reason I am not allowed to post on the Swap Meet. Something about firewalls. Sorry. Thanks

You have to get permission from the webmaster to post on the Swap Meet Forum. It keeps the pantyhose add away. I think you PM him and plead you case.

It sounds like a fun and presently over looked engine. Go for it.

The 202 is a 9 port engine. It has 4 mains and they are the same size as the big block. It has the funny exhaust manifold. It is on top instead of on the bottom. This is a hold over from the 8. The torque # are not bad for a small block. When they destroked it, that upped the rpm's. Someone mentioned turbo. A gentleman by the name of Rudy Bennett in TX has turboed a Jet before. He ran a Jet named Casper (white of course) that was turboed. I do not know if it was a 202 or 308. Turbo has crossed my mine. With the choice of turbo's out there today, who knows. I am ignorant as a rock on turbo tech. Thanks guys. Hud

Check out Brooklands Hudson book if you dont have it already. They discuss a 1954 hopup of the 202 jet taking top speed from 93mph to 110mph. My Gonkulator puts what they did at about 150hp vs the stock 130hp from the hottest 1956 twin-carb versions. Cam, headers, milled head, usual stuff from the era.

I never had a Hudson tho my dad worked at Hudson assembly so some curiosity. That Jet was a little Hot Rod, kinda the L-79 Nova of its day I think.

Thanks Deuce for the heads up on the book. I do not have it, but will try to acquire it asap. I am compiling all the info I can on the 202. Also trying to stockpile some parts.
Do you have the official title of the book and the publisher? I will do a internet search to see if I can locate something about it. Thanks a lot, this will be a great find. Hud

Hudson Performance Portfolio, 1946-1975 (Cobham, England: Brooklands, 2004) 128 pp. The library (OCLC) cataloguing says it's available at $24.95.

God's Peace to you.

d
Inliner #1450

Thanks guy's. Guess what? I looked it up on Amazon and recognized the cover. Went up to my Hudson library and guess what, there it was. A friend had given it to me as a gift for helping him rebuild his /6 a couple of years ago. I have already read all of the parts about the Jet. Came up with a very good piece of info. Hudson made a race cam for the 202. I got a part # for the cam. (SU 309777) If anyone out there has one of these cams or the specs of the cam. I would be interested in both. Big Thanks to Deuce and don for the info. Hud

There used to be an NHRA stocker named "Joan's Red Jet", you could try a Google.

Hey panic. I have a pic of Joan's Jet beating the hottest car on the West coast. It was a Ford that was dealer sponsered and was suppose to be the best. Her Jet was a Hornet Jet. It had the 308 in it. After her win they(NHRA) banned the 7x camshaft. The v8 boys complained until they did it. Thanks for the reply. Hud

Hey all. I am still doing research on the 202 and trying to acquire some parts. Parts are hard to come by. Went to a Hudson meet and talked a lot of Hudson but only picked up a couple of parts. I am posting to bring the topic back to the top. I would be interested in a twin-h for this engine. Would also be interested in the SU camshaft. If there are any out there please let me know. Thanks again Hud

Without better knowledge of the design I can't make specific reccos.
However: there are some pretty generic mods that apply to most sidevalve engines.
1. more compression.
2. piston to head .035" @ TDC.
3. sleeve the intake guides down and run a smaller stem valve (5/16"?) with a larger head, like 1-7/8" or more if the seat isn't too close to the bore or exhaust seat.
4. 30° intake seat (if not already).
5. the exhaust may already be big enough, but the valve should be re-contoured with a back-cut etc.
5. relieve the edge of the factory seat or relief facing the bore into a 1/4" radius (or whatever fits). Don't extend the relief all the way to the bore, just ramp it up to the deck.
6. I'd measure the inter-port centerline distance (between #1-2 and #3-4) and see if any other engines (incl. OHV) are really close. As a guess, it's between 7 and 8". It might be close to the Ply/Do 218 & 230, or Rambler 184" etc. pre-1965 L6 motors.
7. the obvious new manifold is 3 head flanges, 3 base flanges, and 3 tubes for a triple sidedraft using 3 × 1-1/2" SUs.

Thanks panic for the reply. Here is a few things about this engine. It is the last one designed by Hudson. It is the 8 with 2 cylinders chopped off and modernized. Full pressure oil system. The engine is 3x4.75. The cylinder arangement is not good. It is in halves, 3 cylinders in the rear and 3 in the front with a big space in between. The 3 cylinders are jammed together. Not any room ot bore. a .050 is the largest overbore recommended. So a big overbore is out. The stroke is long for such a small bore. This means piston speed will always be a factor to consider. The valves could be enlarged some but the ones in it are sufficient to handle the bore limitation. Hudson blocks are relieved around the valves and all the way to and into the bore. I am really looking at the main 3 things cam,head ,carberation. The manifold set up of this is like the old 8. The exhaust manifold is on top and the intake is on the bottom. I am thinking a custom intake and a custom set of headers would be a great improvement. With some relief work in the ports. Most inlines respond well to headers.The old 8 had exhaust ports on top of the engine. This engine has all its ports on the side. Have been talking to a guy about building a custom intake and exhaust flange for me. I really would like to have another engine before I start the build. I have found that things go better with 2 engines. Thanks again. Hud

I hope you keep us up on your build. It's fun to have something different to read.

Hey Beater. That is what my machinist says about me. When he sees me coming he knows it going to be something different. Hud

In 2012 a 200 inch Hudson flathead inline six cylinder is not something many machinist would call normal.

Nothing new to report on the 202. I wanted to bump this back up to the top. I am still looking for a twin H for it and a SU camshaft. Haven't gotten any results as of yet. Found a couple of engines but they are so far away it isn't practical to try to get them. I guess that is the way it usually is. Any help is appreciated. Hud