I have always been a fan of 1947-53 Austin A40's. Occationally I will cruise ebay and craigslist for ads. Today noticed what apears to be the longest intake runner length. I think I count 4 spacers on top of a tunnel ram manifold. Sheesh
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March 7, 2009 12:46 p.m. RandyS New Reader
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March 7, 2009 2:29 p.m. cxhb New Reader
is that necessary? No really, its a serious question.
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March 7, 2009 3:07 p.m. cwh Dork
Actually, I think the runners were longer on the Dodge 413 Ramchargers in '62.
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March 7, 2009 4:37 p.m. M2Pilot New Reader
Were the ones on the 413s those that crossed over the top of the engine with carb over the right valve cover or thereabouts feeding left 4 cylinders & vice versa. I rode in one of those when they were new. My goodness gracious it was fast for it's time.
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March 7, 2009 4:40 p.m. cwh Dork
Yep, right side carb fed the left bank, visa versa. Sounded bodacious as well. IIRC, mid 12's in bone stock shape.
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March 7, 2009 5:42 p.m. Monkeywrench Reader
cxhb wrote:
is that necessary? No really, its a serious question.
For performance? No!
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March 7, 2009 6:08 p.m. Carson HalfDork
M2Pilot wrote:
Were the ones on the 413s those that crossed over the top of the engine with carb over the right valve cover or thereabouts feeding left 4 cylinders & vice versa. I rode in one of those when they were new. My goodness gracious it was fast for it's time.
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March 7, 2009 6:19 p.m. MadScientistMatt HalfDork
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March 7, 2009 6:53 p.m. erohslc New Reader
Here's a Spitfire with prototype long runner (about 6 ft each) setup:
http://www.flickr.com/photos/13867611@N04/1517810024/
But I couldn't find enough room to coil up all the runners, and still close the bonnet.
Carter
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March 7, 2009 6:59 p.m. foxtrapper SuperDork
VW Beetles running the old Holley setup are longer. The runners were right around 22 inches as I recall. To say fuel dropout was a problem in the winter would be quite an understatement.
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March 7, 2009 7:54 p.m. slantvaliant Reader
This is about as long as I'd like to go ...
Slant Six Hyperpak
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March 7, 2009 11:19 p.m. jcanracer None
In intake manifolds, is the general rule: shorter runners for high rpm power and long runners for low end performance?
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March 7, 2009 11:46 p.m. Trans_Maro Reader
That scoop looks like my mailbox!
Shawn
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March 8, 2009 1:39 p.m. Appleseed Reader
The Ramchargers High and Mighty. Arguably, the first tunnel ram.
And it has the coolest tach EVER!
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March 8, 2009 1:47 p.m. mad_machine SuperDork
jcanracer wrote:
In intake manifolds, is the general rule: shorter runners for high rpm power and long runners for low end performance?
yes, long runners promote air velocity, after a certain point though, they become a hinderance.
Dual path intakes are good like that.. the one on my bmw is like that.. longer at low RPMs for torque and smoothness.. and short path for high rpm use for air speed and flow
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March 8, 2009 6:32 p.m. cwh Dork
Yes, the Ramchargers wer ethe original long ram guys. I believe they were all Chrysler enginers. Grassroots grandfathers.
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March 8, 2009 7:07 p.m. Trans_Maro Reader
The advantage to the Ramchargers setup is that if the fuel does drop out of suspension, it just falls into the engine anyway
Shawn
