this is referred to as a FFIM? If so, I like it and would want it on my car to keep it clean, cool, shorter pipings.
Long Runner Intake Manifold :)
- Thread starter madsupra88
- Start date
this is referred to as a FFIM? If so, I like it and would want it on my car to keep it clean, cool, shorter pipings.
Short runners allow for more airflow due to less restriction. the longer a pipe the more resistance to flow it has, short runner manifolds allow for higher flow rates at the expense of air velocity (low end off boost torque)
Long runners promote higher velocity of intake air at lower RPM's. since the air speed is higher its harder to slow down, if the valve opens the air is coming at it at a high rate of speed. it almost pushes itself into the cylinder using its own inertia.
It does this because the pipe is more restrictive so speed must go up to balance flow. at top end the restriction becomes more and actually chokes off high end flow.
Short runners have lower velocity of air so when the valve closes the air speed becomes slow, when its slow theres less inertia keeping the air moving towards the valve. since the air isn't moving itself to the open valve anymore it relies more so on the downward movement of the piston creating a low pressure system inside the cylinder to draw the air in.
Flow is easier resulting in less air speed. on the top end the resistance to flow is not as great so flow is not impaired or choked like it is in a long runner because theres less resistance. Since flow is not limited or impaired more power can be made at high rpm.
in easier shorter terms short runners have lower velocity so the air needs to be drawn in by the piston. the long runner has higher velocity inside the runner so when the valve opens the inertia of the moving air pushes itself in resulting in better volumetric efficiency compared to a short runner, resulting in more power.
Its probably more complicated then that and theres probably better terms to use, but im not a fluid dynamics (or whatever this classifies as) expert. That is the basic idea though.
Long runners promote higher velocity of intake air at lower RPM's. since the air speed is higher its harder to slow down, if the valve opens the air is coming at it at a high rate of speed. it almost pushes itself into the cylinder using its own inertia.
It does this because the pipe is more restrictive so speed must go up to balance flow. at top end the restriction becomes more and actually chokes off high end flow.
Short runners have lower velocity of air so when the valve closes the air speed becomes slow, when its slow theres less inertia keeping the air moving towards the valve. since the air isn't moving itself to the open valve anymore it relies more so on the downward movement of the piston creating a low pressure system inside the cylinder to draw the air in.
Flow is easier resulting in less air speed. on the top end the resistance to flow is not as great so flow is not impaired or choked like it is in a long runner because theres less resistance. Since flow is not limited or impaired more power can be made at high rpm.
in easier shorter terms short runners have lower velocity so the air needs to be drawn in by the piston. the long runner has higher velocity inside the runner so when the valve opens the inertia of the moving air pushes itself in resulting in better volumetric efficiency compared to a short runner, resulting in more power.
Its probably more complicated then that and theres probably better terms to use, but im not a fluid dynamics (or whatever this classifies as) expert. That is the basic idea though.
And then there is variable geometry manifolds like with Toyota's ACIS, where valves inside reflect the air pulse after the valve closes, back to the intake valve, creating a mild supercharging effect. A short runner can not effectively fill the cylinder at low rpm, and the longer one can not fill it at higher rpm. There isn't enough time.
So madsupra, your idea of a clean engine bay is to be able to see the entire valve covers. Ok, sounds good.
By the way, that isn't clean, this is.
So madsupra, your idea of a clean engine bay is to be able to see the entire valve covers. Ok, sounds good.
By the way, that isn't clean, this is.
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Don't get ahead of yourself here.... Your Engine bay is NOWHERE close to Nate's bay in cleanliness.Nick M;906272 said:
Nick M;906272 said:
I dont see why your making a big deal out of this nick!!! \\
FFIM simply cleans up the bay !!! i dont mean by sparkly clean i mean by not making our stock engine bays look all cluttered up. i didnt say there was anything wrong with the stock setup AT ALL....
This has been proven over and over again.. FFIM will give you more power, less piping for you IC, easir routing for your IC, and keeps the intake charge on the colder side...
Now im not gonna sit here and argue with you on what looks better because thats just your opinion.
On the other hand, since I started this thread, AND I have my OWN opinion. This is what i want to do for myself, and to help the supra community out !!!
Now if you likey then stay here and watch the progress, if you no likey then there is other threads out there for you to bash on...
Thanks..
-saif
funky_monkey58;906280 said:
I got a little busy last night so i couldnt get pics. bt i will have some tonight for sure.
thanks
-saif
Ok people here is the good news youve been waiting for 
Ok first of all.. the ONLY modification u have to do is this VVVV
Shorten the stud a 1/2 " in the alternator (no harm whatsoever) like i did. not hard at all rite!!!
And if you plan on running a stock throttle body, it might clear without cutting. im using a 80 mm t body thats y.
on with the clearance pics shall we
Sooo... wataya think
Ok first of all.. the ONLY modification u have to do is this VVVV
Shorten the stud a 1/2 " in the alternator (no harm whatsoever) like i did. not hard at all rite!!!
And if you plan on running a stock throttle body, it might clear without cutting. im using a 80 mm t body thats y.
on with the clearance pics shall we
Sooo... wataya think
you said 500 plus shipping for the whole deal minus the throttle body? I'm interested, just need to get everything else lined out first.
According to my measurments is clears. but just for everyones sake, i will post a little video showing how it clears with the hood shut :bigthumb:
Plus the T-body flange is not fully done, it will be rounded of to look nicer and give more clearance.
remember this is not the finished product, just a mock up. the finished product will be Much much cleaner and its gonna look HAWT
Plus the T-body flange is not fully done, it will be rounded of to look nicer and give more clearance.
remember this is not the finished product, just a mock up. the finished product will be Much much cleaner and its gonna look HAWT
LOL was just wondering as I've built a few of these things
(keep in mind the motor rises on that side under power)
(keep in mind the motor rises on that side under power)
I know this is the mock up and all but are you planing for any of the factory ports for your personal build? (CSI, ISC, EGR) I assume thats why we would need to send in a Manifold so you can use the factory ports and just weld them on, am I right? Looks very cool! When its done expect some orders from people like me.:biglaugh: