
Ram Pipes
#1
Posted 10 November 2010 - 10:25 AM
1. is it the longer the ram pipe the better for torque?
2. will a ram pipe and sock be better then just a standard air filter
3. also how much clearance do you need at the mouth of the ram pipe?
as you all know i am using a suck through supercharger set up so i have plenty of room at the front for a ram pipe and sock, so length isnt a problem to some degree
#2
Posted 10 November 2010 - 10:29 AM
1) generally yes, but also the shape has a lot to do with it as well.
2) a sock over a ram pipe will change the flow characteristics for the worse.
3) ??
#3
Posted 10 November 2010 - 10:55 AM
Ans..
1) generally yes, but also the shape has a lot to do with it as well.
2) a sock over a ram pipe will change the flow characteristics for the worse.
3) ??
+1, when we took our crossflow engine to the rolling road, the bloke told us that the pipercross socks are useless.
And can potentially be dangerous, if you get spit back, they can become soaked in fuel then easily ignite.
A proper air filter, with plenty of room inside is much better than a sock.
With the ram pipe, if you can only fit a short'ish one, try and get one that has a large angle on the bell. This is what vizzard says in his book.
#4
Posted 10 November 2010 - 11:12 AM
also 3. say if the the mouth being the end of the ram pipe how much area behind this do i need before it becomes very restrictive?
#5
Posted 10 November 2010 - 11:21 AM
Try running around your garage.... ie a 90 degree sharp edged wall, see how close you can get to following the exact line of the wall, air is no different in this respect, so the smoother, larger the radius the better. The bigger the distance the better.
#6
Posted 10 November 2010 - 11:23 AM
Longer ram pipes will shift the torque slightly compaired to an identicle shaped but shorter ram pipe
#7
Posted 10 November 2010 - 11:23 AM
well my plan now is to remove the spacer block between carb and vmax inlet to get an extra half inch, use the 3" long ram pipe with the k&n mesh filter at the end
#8
Posted 10 November 2010 - 11:53 AM
#9
Posted 10 November 2010 - 03:04 PM
#10
Posted 10 November 2010 - 03:53 PM
Remember with forced induction, the air is basically thicker so porting work will have a good effect, along with big valves, de-shrouding etc. The more space/length between the blower and engine means there will be more lag (I know it's not like a turbo but it still has to pressurise the chamber), if you can fit a charge cooler in there then it will be VERY good, FAR more beneficial than messing around with pipe lengths, my blower exit is about 6" from the inlet valves (V8 though).
I love superchargers- my current RV8 mx5 is making 370bhp at 7000rpm, and pulls like a train from about 2000rpm, it makes me VERY happy

#11
Posted 10 November 2010 - 06:04 PM
i do have a vizard book but i cannot find it for the life of me
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