ITB setup opinions?
#83
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individual throttle bodies plus a plenum > one throttle body in front of the plenum.
imagine having big *** ports at high rpm and teenie high velocity ports at low rpm? mmm sweeeeet.
imagine having big *** ports at high rpm and teenie high velocity ports at low rpm? mmm sweeeeet.
#84
Lets see if I can redeem myself! If your cruising at 3500 RPM, Thats about 58 Rotations per second, and about 116 strokes per second right? 2 strokes per rotation right? (Im rounding my numbers)
If you ask me, saying that one stroke pulling air through a 60mm TB is wrong givin the amount of air that can be pulled in the engine in ONE second depending on RPMs.
If you ask me, saying that one stroke pulling air through a 60mm TB is wrong givin the amount of air that can be pulled in the engine in ONE second depending on RPMs.
#87
What do Indy Car, Prostock, and Moto GP all have in common? They are all unlimmited naturally aspirated racers, and they all have one throttle body per cylinder.
The only time I have seen a single throttle body in an unlimmited application, is turbo or supercharged drag cars. I think it is because the plenum has a pressure high enough to keep one runner from robbing another, and quick throttle response in not really important.......And I spend a lot of time at the drag strip.
#88
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How much time do you spend driving your car down the street? I want to know about the daily driven characteristics of a setup like this. I under stand WOT performance, but what about cruising?
#89
I have found that cruising along on the street is great. I have had no drivability problems at all. When you crack the throttle it is way more responsive than stock. If you tune it correctly, you will be amazed at how hard it accelerates with part throttle. It make the experience quite nice.
It took a while to get rid of the dead spot when I floored it, but after fiddling with it, I got it to go away.
It took a while to get rid of the dead spot when I floored it, but after fiddling with it, I got it to go away.
#90
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You bring up a very good point. The throttle body in front of the plenum is what will always cause a lower pressure inside a naturally aspirated intake tract than the air outside of the intake tract.
What do Indy Car, Prostock, and Moto GP all have in common? They are all unlimmited naturally aspirated racers, and they all have one throttle body per cylinder.
The only time I have seen a single throttle body in an unlimmited application, is turbo or supercharged drag cars. I think it is because the plenum has a pressure high enough to keep one runner from robbing another, and quick throttle response in not really important.......And I spend a lot of time at the drag strip.
What do Indy Car, Prostock, and Moto GP all have in common? They are all unlimmited naturally aspirated racers, and they all have one throttle body per cylinder.
The only time I have seen a single throttle body in an unlimmited application, is turbo or supercharged drag cars. I think it is because the plenum has a pressure high enough to keep one runner from robbing another, and quick throttle response in not really important.......And I spend a lot of time at the drag strip.
if you could
wouldn't you?
#92
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it's a k series setup from hayward.
for a couple grand, you could have one too.
http://www.haywardperformance.com/intake_systems.php
for a couple grand, you could have one too.
http://www.haywardperformance.com/intake_systems.php
#94
Thats like saying they could have put a better intake on there or even a more free flowing exhaust. They cant cause they have to stick to certain standards. Im sure if they could have they would have slapped a begger displacement engine in there, but that would change the classing of the car. (Isnt there some kinda tax overseas based on your engine displacement?)
use a vacuum block to combine the 4 shitty signals into a somewhat useable single signal.
#95
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[/quoteI think that it helps alleviate the symptom tremendously, but does it truely completely eliminate it? [/quote]
Uh, yes. When the valve opens, you pull air from the plenum, which pulls from the throttle body (and now we're back to the 60mm vs. 40mm argument). The rest of the runners get the bouncing effect that Scooteroo was talking about.
#96
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Lets see if I can redeem myself! If your cruising at 3500 RPM, Thats about 58 Rotations per second, and about 116 strokes per second right? 2 strokes per rotation right? (Im rounding my numbers)
If you ask me, saying that one stroke pulling air through a 60mm TB is wrong givin the amount of air that can be pulled in the engine in ONE second depending on RPMs.
If you ask me, saying that one stroke pulling air through a 60mm TB is wrong givin the amount of air that can be pulled in the engine in ONE second depending on RPMs.
#98
I really dont think you do understand WOT performance.
I have found that cruising along on the street is great. I have had no drivability problems at all. When you crack the throttle it is way more responsive than stock. If you tune it correctly, you will be amazed at how hard it accelerates with part throttle. It make the experience quite nice.
It took a while to get rid of the dead spot when I floored it, but after fiddling with it, I got it to go away.
It took a while to get rid of the dead spot when I floored it, but after fiddling with it, I got it to go away.
When 90R refers to alpha-n above hes refering to tuning with just tps and map as i explained earlier just to clarify to you. This is the setting you need to set MS (or any other ECU) to to run no map sensor input.
Dann
#99
I dont even know anymore.
I think what I was trying to get across is that one stroke is irrelevant to the grand picture. In one second an engine can take in more air than I can breath in a minute. Its like breathing through a straw. If you open up the airway it gets easier to pull in air.
okay, okay....no more math for me.
Atleast I think my math was right on the second try!
I think what I was trying to get across is that one stroke is irrelevant to the grand picture. In one second an engine can take in more air than I can breath in a minute. Its like breathing through a straw. If you open up the airway it gets easier to pull in air.
Atleast I think my math was right on the second try!
#100
I was warned for this post by curly, I believe this to be unjust. I stand by my original post and would like to add that the OP's reasons for starting this topic are retarded. You can't thread crap in a beshitted thread.
In case you missed his reasoning behind wanting ITBs:
" mean think about it. If you have a LS-1 camaro and you get beat by a turbo Miata...you'll be like, "that thing weighs 1/2 my car, and I don't have boost...let me boost my car, then we'll see who wins". However, if you beat me, but I still can hang with you, you might say, "that thing is pretty fast, but I didn't hear it blow off. What? It's Not Boosted??? That's pretty mean!"
ITB's change the whole power band. I have read that it's full throttle power from 3000-9000 RPM."
In case you missed his reasoning behind wanting ITBs:
" mean think about it. If you have a LS-1 camaro and you get beat by a turbo Miata...you'll be like, "that thing weighs 1/2 my car, and I don't have boost...let me boost my car, then we'll see who wins". However, if you beat me, but I still can hang with you, you might say, "that thing is pretty fast, but I didn't hear it blow off. What? It's Not Boosted??? That's pretty mean!"
ITB's change the whole power band. I have read that it's full throttle power from 3000-9000 RPM."