Sonoramic (Long Ram's)?????

[6 packin]

Any one run these before? Do they make desint power?? Bottom end torque? What cars will they fit? How bout a 73 Duster?

[dkn1997]

fit is a problem, have you seen the 300's at the car shows who run these? fender to fender. I am no expert, but I doubt if they would fit in a duster, they would make it difficult to work on the engine also.

[ajmopar]

I saw some on an early b body (64 plymouth fury) and the inner fender on the passenger side had to be notched quite a bit to make it fit. I think the A body will be even more work. Keep in mind as well that there was at least two varitations (the 300 guys will probably jump in here) one with fully divided runners, and one that was divided halfway down. The half divided one is a higher rpm torque peak than the fully divided one. If you could get this thing to hook, It would just throw the car off the line. Good luck.

[Doug Wilson]

The two different divider lenghts were called "short ram" and "long ram", even though they were made on the same casting. The short ram tuned at 3000 RPM on a 383, and the long ram at 2600. These were used on engines that never saw 5000 RPM, and were developed to help out 4000 pound cars in the mid range. Some guys hogged out the interiors to try to make them effective drag race manifolds - with little or no success. They found that 2 4 barrels, in-line, worked a whole bunch better. I had a couple of sets a few years ago, and they were so hard to work with that I sold them on eBay. I paid $250 for both sets and got $600 apiece for them from some poor sucker who is probably still trying to sort them out.

By the way, if you decide to buy some, BE SURE that they have all the factory accessories that they need, otherwise you'll be looking at lots of fabrication.

[lenweiler]

These things make a ton of torque but they fall off in hp at low 5000's

[Doug Wilson]

My experience indicates that they will go to about 5200 on a 383, but they peak at about 4400. On a 400, 413, or 440 the numbers are lower. With that sort of RPM as a usable range, you'd need to use a very mild cam and carbs between 390 and 500 cfm on any engine you used them on.

[6 packin]

I gotta chance to score some cheap! Maybe they will work in pickups?? that would be cool in a pickup hu?

[Doug Wilson]

If you can get them for $200 - $250 they might be worth it for a truck, as long as you get all the pieces, or can do whatever fabricating is necessary. I'd be interested in hearing how the setup works, once you get it installed. I think, if you buy the manifolds right, you'll be in the project at about $1,000 with carbs and everything. Hope it works really GREAT for you.

[Buddy Branon]

Saw some on an A body in Ocala at the D. Garlis Show last year. He had really hogged out the fender wells and such. It WAS a cool looking set up. Dude said it would really light up the tires.

Good Luck with it, BB

[TheTanSedan]

What it does for torque is unreal. Car has trouble with fuel atomization at idle and just off idle, but at highway speeds with 2.76 or 3.23 gears it is the most impressive thing you can imagine. A Letter 300 weighed 4500, so passing "slower traffic" (and everything would have been in 1962, today everything but Vipers) was the key to their popularity and image.

You'll need more space than you might imagine, but it'd blow peoples minds.

[mr_340]

This has me thinking this would be a great towing engine for my truck. Sure would be an improvement over the 5.2LTBI. I wonder if two TBIs could be run on these manifolds? Hmmm...?

[pishta]

Mr_340, you had to have seen THE picture of a dual TBI setup on one of these. I saw it somewhere on the net and I think it was anodized blue, you couldnt miss it. Ill have to look for it now.....I heard the thing would literally puddle with fuel on a cold day.found it.............

[Doug Wilson]

Pishta - Great photo. It would be nice to be able to download it. I think I'd frame it and put it with my other MOPAR pix on the wall.

[John Kunkel]

Here's a pic of the long rams in a B body, notice the inner fender surgery on the right side.

[Tim Keith]

I'd like to see a set cast in aluminun with shorter tubes for an A-body, set up for multiport injection. For visual effect you can't beat them, EFI would help make them practical.

[pishta]

The reason they are 30 inches long is because of the sonic properties of the A/F mix. 3200 RPM/speed of sound in FPS*6 or something crazy like that. By altering the length, you would have to do the math to get another equal devisor (6 being the number of times the wave travels back and forth in the 30" tube in a time of an open valve at 3200 RPM or .0021 seconds, or something close). Cross rams are alot shorter and for sex appeal, I dont see why a couple of pieces of aluminum rigid EMT couldnt be fashioned to resemble a cross ram set up for MPFI system. Like Kinsler velocity tubes on their sides!

[ajmopar]

Oooh, now you're on to something! That would be so cool! Not all that hard to do on a big block either, (no water in the manifold, and it already has a valley tray). I think I'll get the 48 running with a carb first though.