What does 'Dual Ram' mean?

**Mr Earl** · 01-11-2007, 03:31 AM

Originally Posted by friscofrankie

Early Ram Induction Ala Chrysler 1960:

Long isolated intake runners Like this extreme example can improve low-end torque. They would tend to run out of poop as revs rise though. A manifold such as this or any long-runner type without an open plenum would have to be matched with suitable cam timing and cylinder pressure to get the desired effect. The long-runners increase the velocity of air as it enters the cylinder allowing a higher density of air/fuel mixture available for combustion.

This is the original "RAM Induction System" offered on American V-8s in the early days of the "Muscle Car" era.
So. What is "Dual Ram?" Without knowing what the marketing yo-yos decided they could attach this super-duper sounding phrase could be attached to, one can only guess.

AS thetyim said the "Dual" may mean a system that adjusts plenum volume/runner length as RPM increases thus giving you some relief from the limitations of a simple long-runner induction system.

And Holden is a just GM R&D company that tests ideas on the guinea Pigs in upside down world before trying to sell them in the real market.

That's the intake manifold of a Chrysler 413/426 "wedge" engine. It
was also called the "cross ram" engine.
interesting article

Chrysler Ram induction

more Ram infp

makes me want to got back in time!

**peterpan** · 01-11-2007, 06:18 AM

Originally Posted by Mr Earl

[

Man, that is one Fugly set of wheels.

**friscofrankie** · 01-11-2007, 06:35 AM

I had a ex-CHP 1957 rodger-ram-jet kinda car with the tallest fins ever made, a 392 hemi with dual cater AFBs and what they called cast iron headers. Three-speed push-button hydromatic trans. Fuckin tank; accelerated like a fly-weight. Went to Jail and my (soon to be EX) girl-friend sold it for $25
I did some crazy shit with, and in, that car.
Ah, but that's another story...

**Mr Earl** · 01-11-2007, 08:16 AM

^The fins of the 57 model year were great.

My pride and joy was an excellent condition rust free 1956 Chrysler Newport New Yorker 2dr hardtop with a 354ci hemi.
It had power windows and seat. Two speed push button. Not a rocket but a wonderful road car it was. Those old hemi's had something special about them.

**peterpan** · 01-11-2007, 08:20 AM

Originally Posted by Mr Earl

. Two speed push button. Not a rocket

**Mr Earl** · 01-11-2007, 08:21 AM

Originally Posted by peterpan

Man, that is one Fugly set of wheels.

I love them! Check this dash! It was the greatest.

The gauges had a terrific back light similar to the 1990's Lexus fiber optics lighting.

**blackgang** · 01-11-2007, 09:38 AM

Guy I worked for had a 59 Chrysler 300, and we were working in LA and drove back most weekends to Sacramento,, Very classy ride.
413 was not a rocket as that was their torquer engine and mostly used in commercial applications.

**Marmite the Dog** · 01-11-2007, 11:09 AM

Originally Posted by peterpan

Man, that is one Fugly set of wheels.

I was going to say that US cars are a case of style over substance, but I failed to see the 'style'.

Luckydog · 01-11-2007, 03:57 PM

I am a bit confused gents...........never mind.

**Mr Earl** · 01-11-2007, 04:33 PM

Lucky it's all about "Ram" induction. The above car had the lovely ram inducted 413 "wedge" engine.

**Thetyim** · 01-11-2007, 04:43 PM

^^ An inlet manifold is a compromise.
If it is designed for max hp then low end torque will suffer.

Your manifold changes characteristics at 4000rpm
Does that help?

**a. boozer** · 01-11-2007, 05:41 PM

Originally Posted by peterpan

Originally Posted by Mr Earl

. Two speed push button. Not a rocket

Reminds me of a 98cc Excelsior motorcycle that I once had, that had a two speed gear box as well!

**AntRobertson** · 01-11-2007, 06:59 PM

Originally Posted by Marmite the Dog

Originally Posted by peterpan

Man, that is one Fugly set of wheels.

I was going to say that US cars are a case of style over substance, but I failed to see the 'style'.

I think that the kindest thing that can be said about that car is that it's 'different looking'.

**blackgang** · 01-11-2007, 07:19 PM

But a 2 speed automatic really has nothing to do with 2 gears, it is speeds and has to do with the pitch of the turbine blades or switching to different bands in the trans case, the same as the vari pitch props on boats or changing props of a different pitch.
There were a lot of auto trans back in the 50s and 60s that had 2 speed autos, never 2 speed manual transmissions.
Buick DYNAFLO was a 2 speed also low for slow speed and Drive for normal hyway speeds. But you didn't have to use low, just Drive all the time as was torque converter, same as all autos.
Mopar had Tiptomatic where you could use 3 speeds as in a reg. column shift or just leave it in 3rd gear all the time and everything was taken care of by a torque converter, but it used engine oil from the engine crankcase so wasn't a very good deal and only lasted a few years til they discontinued it.

But as with most all auto trans. you had to use a lower setting when pulling hard because of the convertor slippage in the fluid would cook your trans if you didn't gear it down. as is still true today.

**Thetyim** · 01-11-2007, 08:10 PM

^ You heard about the new 2008 Corvette C6

You are forced to go from 1st gear to 4th gear with the manual transmission model if you don't give it enough welly

**blackgang** · 01-11-2007, 08:56 PM

What is welly? and do you mean 1st to 4th or thru all the gears??

**Thetyim** · 01-11-2007, 09:01 PM

If you don't give it enough throttle/rpm then it omits 2nd and 3rd gears

They even sell a kit to over ride the computer because the punters don't like it
http://forums.corvetteforum.com/show....php?t=1470758

**blackgang** · 01-11-2007, 09:06 PM

OK thats kinda what I thought, maybe it figures that it has enough power to move alright by skipping the 2 intermediate gears if you use such a slight throttle and don't need the shifting unless you are really into it.

But that is a strange number for a GMC trans as Ford always used the C for their trans. And C6 was their strong one.
GMC used TH350 or TH400 for their turbo hydros.

**Texpat** · 02-11-2007, 04:10 AM

Thailand has come out with a kit converter to upgrade your engine to a dual ram. On sale now at Issan auto part stores everywhere.

**Mr Earl** · 02-11-2007, 06:49 AM

Many drag racers use the old 2 speed powerglide transmissions because of their toughness.

**peterpan** · 02-11-2007, 07:20 AM

Originally Posted by Mr Earl

Many drag racers use the old 2 speed powerglide transmissions because of their toughness.

Maybe they did 50 years ago when you were a lad Early, but now they use purpose built race transmissions like Lenco Racing Transmissions

**Mr Earl** · 02-11-2007, 08:56 AM

slick stuff

The LENCODRIVE is the shortest and lightest torque converter driven transmission available anywhere. The LENCODRIVE comes as a 2 speed with reverse. You can expand to 3 or 4 speeds by addition of additional cases. The 2 speed, including reverse, bellhousing and lining weighs approximately 108 lbs. The three speed is approximately 135 lbs. All cases are magnesium.

**blackgang** · 02-11-2007, 09:31 AM

B&M builds a lot their transmissions on the Mopar 727 base and with heavier torque converters for high HP. offroad as well as strip usage.

**Thormaturge** · 02-11-2007, 12:04 PM

Here we have Somchai demonstrating the Thai "dual Ram" system. What happens next is not for a respectable forum.

Luckydog · 02-11-2007, 02:27 PM

Sooooo should I be glad my Holden 2.6 is Dual bluddy Ram.....OR F'ING NOT?

Wish I'd never asked........

Thread: What does 'Dual Ram' mean?

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