Idea to eliminate turbo lag..., ...or am I crazy. Options

[CheesyLobster]

So I just though of this idea that could eliminate turbo lag completely, and I was wondering if it’s ever been tried or anything.

My idea is that the turbo and piping for the turbo would be normal, except just before the throttle body, there could be a split pipe. Attached to this pipe would be sort of a short ram air intake, except there would be a high quality one-way valve in between the filter and throttle body. This way, before the turbo has spooled, the engine would get air from the short ram intake, and be like an N/A car. But once the turbo is going, the pressure in the intake pipes would over power the short ram, and close the one-way valve, thus utilizing the turbo piping setup.

Kind of confusing, hopefully this crappy pic I drew in paint can help. I drew in with a 7afe.

So what do ya guys think? Seems like it could work if the 1 way valve is good enough.

[Fietsbel]

What i think? i think that youre bumper is a bit wrecked

[biglipzit]

i dont think the engine has much trouble running NA just through the turbo even if the turbo wasnt spinning at all... I think the main scene behind turbo lag is that when the boost is needed for the extra HP and kick, it takes a while to spool up when acceleration from first is hard and boost is wanted. Its not about allowing the engine to get air to run but all about getting the boost to accelerate quickly without waiting for spool up because in that method u still end up waiting for the boost to kick in as the engine is still just running from atmoshperic pressure air that it could get from the turbo line anyway even if boost isnt being made.

I also think that you either stayed up too late thinking this or woke up too early... 5:02am man.... whahhhhh

[shid]

I've actually thought about this, I think there's another post somewhere on this forum about it. I don't think it works...

[lagos]

no this would do nothing to reduce turbo lag, but believe it or not, this is sort of how the mr2 turbo work. on the mr2 the bov is called a bypass valve. during normal cruising the valve opens and lets the engine get some of its air though it, insed of having to go though all the piping. then when u boost, the valve closes.

tubo lag is something that happens when u hit the gas and wait for the turbo to spool up and take you from VAC to boost. the best way to reduce it is to keep the IC piping as short as possible and to free up the exhaust (3in turbo back).

[SlowCelica94]

Unless you're planning on running a large turbo (like a t3/t4, large 4 our cars) I wouldnt worry about it. But if you are indeed lossing sleep, you can try this. Use about a 50-75 shot of nitrous from 1,300rpm to spool rpm. This can be accuracly done with the use of a window switch, which controls the rpm range the nitrous sprays. Very safe, very smart.

I know, I know, I'm a nitrous junkie.

[shid]

Unless you're planning on running a large turbo (like a t3/t4, large 4 our cars) I wouldnt worry about it. But if you are indeed lossing sleep, you can try this. Use about a 50-75 shot of nitrous from 1,300rpm to spool rpm. This can be accuracly done with the use of a window switch, which controls the rpm range the nitrous sprays. Very safe, very smart.

I know, I know, I'm a nitrous junkie.
[right][snapback]229101[/snapback][/right]

Most T3/t4 turbos aren't that large for our 2.2l cars.. well, the Super 60 trim and above are, but a 50 trim is just right- I mean hell, they recommend a T3/T4 40 trim for the smaller honda's.

This post has been edited by shid: Jan 2, 2005 - 4:45 PM

[CheesyLobster]

i dont think the engine has much trouble running NA just through the turbo even if the turbo wasnt spinning at all... I think the main scene behind turbo lag is that when the boost is needed for the extra HP and kick, it takes a while to spool up when acceleration from first is hard and boost is wanted. Its not about allowing the engine to get air to run but all about getting the boost to accelerate quickly without waiting for spool up because in that method u still end up waiting for the boost to kick in as the engine is still just running from atmoshperic pressure air that it could get from the turbo line anyway even if boost isnt being made.

I also think that you either stayed up too late thinking this or woke up too early... 5:02am man.... whahhhhh
[right][snapback]229030[/snapback][/right]

I thought that there is a vacum (neg. pressure) in the intake when you have a turbo car before the thing can spool?

[biglipzit]

I imagine if there was a vacuum in the air intake when the turbo is just spooling up that there will be no air to combust and the engine wouldnt run. The vacuum registered on a boost guage just shows a period when the engine is sucking all the air out of the intake before boost is made and the vacuum forms as the air is sucked out of the pressure tubing going to the boost guage. Theoretically it seems like one because the air is sucked out by the engine and more is rushing in but the suck doesnt allow the boost guage line to fill up with air so it seems like a vacuum until force induced air fills it and registers boost.

[SlowCelica94]

Unless you're planning on running a large turbo (like a t3/t4, large 4 our cars) I wouldnt worry about it. But if you are indeed lossing sleep, you can try this. Use about a 50-75 shot of nitrous from 1,300rpm to spool rpm. This can be accuracly done with the use of a window switch, which controls the rpm range the nitrous sprays. Very safe, very smart.

I know, I know, I'm a nitrous junkie.
[right][snapback]229101[/snapback][/right]

Most T3/t4 turbos aren't that large for our 2.2l cars.. well, the Super 60 trim and above are, but a 50 trim is just right- I mean hell, they recommend a T3/T4 40 trim for the smaller honda's.
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Ah, see I thought the t3/t4 had set trim levels, and I was under the impression it was a 64 trim.

[recneps]

they sell multiple trims fopr the t3/t4 but im pretty sure most are more like the high 40mm.

[lagos]

a 3in downpipe, mid pipe, all the way back with no cats, and a st205 water to air IC, should basically be the best way to eliminate any turbo lag.

[saleeka]

ha, the BEST way to eliminate turbo lag... use a supercharger, lol The way a turbo is designed to utilize the exaust as its means of "spool" so to speak means that lag is nearly inevitable- its part of the turbo motor package...

[spunky393]

My buddy that raced nopi succesfully is creating a new thing this year. Basically, (on his supra), the piping from the turbo will go straight up to a custom box which then goes straight into the intake. the advantage of this is the fact that from the turbo to the TB, he'll only have a foot, foot in a half of piping. The custom box will hold mother loads of dry-ice.

[biglipzit]

ha, the BEST way to eliminate turbo lag... use a supercharger, lol  The way a turbo is designed to utilize the exaust as its means of "spool" so to  speak means that lag is nearly inevitable- its part of the turbo motor package...
[right][snapback]229212[/snapback][/right]

Well superchargers dont nearly put out as much power as a turbo can and plus dont forget you lose some horsepower in also making the engine spin the super charger. With a turbo it is alot more efficient and negligable amounts of horsepower is lost when utilizing already useless waste fumes. Dont forget turbolag is only present when accelerating hard from a slow cruising speed or in first gear in a launch. If you keep the revs up on the launch then u already have the turbo spooling but when cruising and slamming the gas u get the lag only until the revs rise then when shifting u normally keep the revs up enough to eliminate the lag on the next gear.

[shid]

ha, the BEST way to eliminate turbo lag... use a supercharger, lol  The way a turbo is designed to utilize the exaust as its means of "spool" so to  speak means that lag is nearly inevitable- its part of the turbo motor package...
[right][snapback]229212[/snapback][/right]

Well superchargers dont nearly put out as much power as a turbo can and plus dont forget you lose some horsepower in also making the engine spin the super charger. With a turbo it is alot more efficient and negligable amounts of horsepower is lost when utilizing already useless waste fumes. Dont forget turbolag is only present when accelerating hard from a slow cruising speed or in first gear in a launch. If you keep the revs up on the launch then u already have the turbo spooling but when cruising and slamming the gas u get the lag only until the revs rise then when shifting u normally keep the revs up enough to eliminate the lag on the next gear.
[right][snapback]229314[/snapback][/right]

Thats why the ultimate system is a super/turbo combo They have them on mini coopers. bastards

[biglipzit]

You mean twin charging a car??? I heard they also can do it on a 4agze but u need a electromagnetic clutch like that on an ac compressor to turn off the supercharger after the turbo has spooled up. It is quite an ingenious method of eliminating boost but also very difficult to get working properly. read about some guys doing it on a 4agze but cant remember where. Some guys on this island just did a 4agze head swap on a 7afe and were thinking of trying to twin charge it.

[shid]

You mean twin charging a car??? I heard they also can do it on a 4agze but u need a electromagnetic clutch like that on an ac compressor to turn off the supercharger after the turbo has spooled up. It is quite an ingenious method of eliminating boost but also very difficult to get working properly. read about some guys doing it on a 4agze but cant remember where. Some guys on this island just did a 4agze head swap on a 7afe and were thinking of trying to twin charge it.
[right][snapback]229330[/snapback][/right]

Yeah, its very very hard

[creis]

a little electric supercharger would do the trick, use the 1 way valve to protect the weak supercharger from the turbo preasuer, but that way you can get the 4-5 psi off the elect. SC but once the turbo spools up it will make more psi then that and close the valve and your good, just set up the valve to have a switch to shutoff the SC. but there is not extra work on the motor ot spin the sc (because its all elec. and you dont get the lag.

only problem with your idea is that when the motor is at idel, the turbo is still spinning, just not much so that there is still air preauser in the intake pipe, and some is more then none so your valve would always be closed.

This post has been edited by creis: Jan 3, 2005 - 2:49 AM

[turboinduction]

You mean twin charging a car??? I heard they also can do it on a 4agze but u need a electromagnetic clutch like that on an ac compressor to turn off the supercharger after the turbo has spooled up. It is quite an ingenious method of eliminating boost but also very difficult to get working properly. read about some guys doing it on a 4agze but cant remember where. Some guys on this island just did a 4agze head swap on a 7afe and were thinking of trying to twin charge it.
[right][snapback]229330[/snapback][/right]

ah the good ol HKS twin charger kit for the MK1 MR2. Sweetness.

-Ti