SickWrathTerror
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 Velocity Stacks! Let's see some. | « » 10:43 AM 6-8-2008 | |
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...I'm not talking about throwing money at high speed TCL.  
| Quote, originally posted by SparkyJetta » | | Thou shalt not "throw" intricate VW hand signals at SickWrathTerror. |
| Quote, originally posted by 1.8Transporter » | What!? a thread without a comment from sickwrathterrorboomshakalakabingbadaboom???
Unbelievable! |
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vwlarry
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| Re: Velocity Stacks! Let's see some. (SickWrathTerror) » | « » 10:52 AM 6-8-2008 | |
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The Porsche flat-sixteen that never ran in anger. It sits in the museum at the factory.
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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vwlarry
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| Re: Velocity Stacks! Let's see some. (vwlarry) » | « » 10:55 AM 6-8-2008 | |
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The "dancing stacks" on the Can Am Lolas of the sixties were so cool.
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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| Re: Velocity Stacks! Let's see some. (vwlarry) » | « » 11:01 AM 6-8-2008 | |
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peterJ #13 "Pero la cosa que me gusta mas es panochita"
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Mgriz
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| Re: Velocity Stacks! Let's see some. (ratdub) » | « » 11:05 AM 6-8-2008 | |
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Modified by Mgriz at 11:07 AM 6-8-2008
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IJM
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| Re: Velocity Stacks! Let's see some. (SickWrathTerror) » | « » 11:09 AM 6-8-2008 | |
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Edit: per Larry's requestOriginal 427 Shelby Cobra
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Modified by IJM at 2:35 PM 6-8-2008
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SebringMGB
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| Re: Velocity Stacks! Let's see some. (IJM) » | « » 11:34 AM 6-8-2008 | |
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Edit: Rquested caption 
E-type race cer engine
Modified by SebringMGB at 8:56 AM 6-8-2008
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vwlarry
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| Re: Velocity Stacks! Let's see some. » | « » 11:47 AM 6-8-2008 | |
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Could I suggest each photo have a small caption that identifies what we're looking at? 
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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DedRok
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| FV-QR » | « » 11:53 AM 6-8-2008 | |
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Anyone have a Ferrati GTO with them sticking out of the hood? (with the hood on)
Modified by VWA2MKII at 12:59 PM 6-8-2008
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vwlarry
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| Re: Velocity Stacks! Let's see some. » | « » 12:02 PM 6-8-2008 | |
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BMW 3.5CLS engine in roadgoing trim:
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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das ist
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| » | « » 12:06 PM 6-8-2008 | |
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ITBs > a caring, loving wife.
dumped.it
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Bains
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| Re: (das ist) » | « » 12:10 PM 6-8-2008 | |
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Curious, what exactly is the purpose of them?Seeing as some have them uncovered and some are completely shut I'm guessing its all for looks? Whats the purpose?
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vwlarry
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| Re: (Bains) » | « » 12:17 PM 6-8-2008 | |
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The way I understand them they help to manage and "tune" the flow of air going into the engine, and also raise the speed (velocity) of the incoming air by the venturi-effect they provide. This tends to increase in particular the torque-output, especially when designed to complement the exhaust tuning that always accompanies the stacks (look at the "snaky" headers for reference). The intake stacks manage the incoming air, and the headers manage the outgoing air by creating and maximizing the "scavenging" effect of each cylinder's outflow, which pulls the exhaust from adjacent cylinders, all helping to increase the pumping effect, which in the end just makes more power, which is the root of the whole idea.
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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BRealistic
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| Re: (Bains) » | « » 12:21 PM 6-8-2008 | |
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| Quote, originally posted by Bains » | | Curious, what exactly is the purpose of them? Seeing as some have them uncovered and some are completely shut I'm guessing its all for looks? Whats the purpose? |
It's a way to tune the intake air. I'd say this is more important with carbs since the charge itself is what picks up the fuel (from the carb jets) versus having the fuel injected mechanically. 
"straight roads are for fast cars, curvy roads are for fast drivers"
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vwlarry
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| Re: (vwlarry) » | « » 12:22 PM 6-8-2008 | |
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While not "velocity stacks" the Chrysler "Crossram" intake manifold on the early sixties Chrysler 300s carries the idea into a production car's engine, by having the maximum-length intake runners possible (note the dual carburetors mounted far outboard the engine, with the intake runners crossing over to the intake ports). 
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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| Re: (vwlarry) » | « » 12:25 PM 6-8-2008 | |
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| Quote, originally posted by vwlarry » | | While not "velocity stacks" the Chrysler "Crossram" intake manifold on the early sixties Chrysler 300s carries the idea into a production car's engine, by having the maximum-length intake runners possible (note the dual carburetors mounted far outboard the engine, with the intake runners crossing over to the intake ports).
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Actually, I thought ram air intakes were to give a slight supercharging effect in the low/midrange to boost torque? Something about the better directed intake air building some pressure above the closed valves in the intake, which helps push the intake in the cylinders when the valves open, and promoted more turbulence in the cylinder (better air/fuel mixture).
Honda even used a ram intake on the initial 97/98 CRV to try and help boost the low rpm torque, since it was kind of weak for the vehicle weight (especially with an auto tranny). 
Modified by BRealistic at 12:29 PM 6/8/2008
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hghpsigti
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| Re: Velocity Stacks! Let's see some. (vwlarry) » | « » 12:39 PM 6-8-2008 | |
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| Quote, originally posted by vwlarry » | | The Porsche flat-sixteen that never ran in anger. It sits in the museum at the factory.
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it was in a 917 chassis at rennsport reunion III
some other porsches
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BTM
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| Re: (das ist) » | « » 12:46 PM 6-8-2008 | |
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| Quote, originally posted by das ist » | | ITBs > a caring, loving wife. |
quoted for truth
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| Re: (BTM) » | « » 1:35 PM 6-8-2008 | |
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| Re: (Armed Escort) » | « » 3:45 PM 6-8-2008 | |
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Here were my 48 IDA Webers modified to 51mm. You could almost put you hand down them. 
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mx5er
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| Re: » | « » 3:56 PM 6-8-2008 | |
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Variable length stacks FTW:
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| Re: Velocity Stacks! Let's see some. (SickWrathTerror) » | « » 4:01 PM 6-8-2008 | |
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Small displacement BRM H16  : 
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| Quote, originally posted by AZGolf, to HerrGolf (Her r Golf?) » | | Oh please. You and Jaimie, always in denial. |
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BRealistic
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| Re: Velocity Stacks! Let's see some. (SickWrathTerror) » | « » 4:10 PM 6-8-2008 | |
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Where are the filter elements in these stack designs?
"straight roads are for fast cars, curvy roads are for fast drivers"
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seminole_kev
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| Re: Velocity Stacks! Let's see some. (BRealistic) » | « » 5:31 PM 6-8-2008 | |
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| Quote, originally posted by BRealistic » | | Where are the filter elements in these stack designs? |
There isn't one. my question for this topic:
Correct me if I'm wrong, but aren't they used to improve power at a certain RPM (the length and design of the velocity stack is specific to where you want the power band optimized)?
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BRealistic
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| Re: Velocity Stacks! Let's see some. (seminole_kev) » | « » 5:35 PM 6-8-2008 | |
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| Quote, originally posted by seminole_kev » | There isn't one.
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So any debris/dust is just sucked into the engine? That doesn't sound very smart.
"straight roads are for fast cars, curvy roads are for fast drivers"
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vwlarry
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| Re: Velocity Stacks! Let's see some. (BRealistic) » | « » 5:37 PM 6-8-2008 | |
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At best some of the stacks on racing engines had screens capping them to keep out the bigger stuff like small stones and birds. On a racing car, filtration just wasn't considered of high importance I guess.
"A noble spirit embiggens the smallest man." - Jebediah SpringfieldPlease read my latest article in Automotive Traveler! Link: http://automotivetraveler.com/jump/1364 Thanx, and leave a comment at the end! ☺
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