how to make your turbo spool sooner/quicker

[rodama5anthony]

Looking around the threads info on this topic is rather scattered. and with the disappearance of turbocharged forum section i thought it would be nice to have this info in one spot. However i myself am a novice when it comes to turbos, and i don want so sound like a smart ass spitting out shit i heard around the internet so those who have experience please pitch in and share the knowledge!

 

[92ma71]

The first step for me would be Supporting mods such as Intake, Exhaust, Downpipe, Intercooler. These few mods allow better breathing. The quicker the air can escape, the quicker it can come in. etc you get the point.

The second thing is something I have done. Im not sure about all boost controller but I have the AEM Tru Boost and it has a setting to change wastegate spring pressure setting. Some others may be a little more knowledgeable. Anyways this setting can be set just right for quicker spool time, however if you try to set it to spool to quick, once you hit max boost, you will have alot of boost spike. On the other hand if you set it too slow, the turbo will spool really slow.

This would be a few steps for the stock turbo. The next steps are getting further into detail.

Oh yeah. Forgot about the wastegate washer mod to up the boost a little.

There is a page around here on mods and hp etc.

 

[T701jz]

The first step for me would be Supporting mods such as Intake, Exhaust, Downpipe, Intercooler. These few mods allow better breathing. The quicker the air can escape, the quicker it can come in. etc you get the point.

The second thing is something I have done. Im not sure about all boost controller but I have the AEM Tru Boost and it has a setting to change wastegate spring pressure setting. Some others may be a little more knowledgeable. Anyways this setting can be set just right for quicker spool time, however if you try to set it to spool to quick, once you hit max boost, you will have alot of boost spike. On the other hand if you set it too slow, the turbo will spool really slow.

This would be a few steps for the stock turbo. The next steps are getting further into detail.

Oh yeah. Forgot about the wastegate washer mod to up the boost a little.

There is a page around here on mods and hp etc.

Really!?...I better go buy that AEM Tru Boost/Spool then

 

[92ma71]

Yes look up videos on you tube on how to set up AEM Tru Boost and you can watch them go through the settings. It is a pretty nice unit. It does alot of things and its all in a gauge in my gauge pod so it is clean set up and saves space.

 

[Turbobox]

I just did a mod for this 3 days ago. The stock wastegate actuator spring is just too soft. Throwing boost controllers at it will boost it up but the turbo will spike and settle back down to a lower boost. Shimming the wastegate with washers barely does much (I was using this setup since I installed a stock turbo upgrade). Iended up using a stiff spring and attached it to the stock turbo wastegate arm and bracket to give additional spring tension. This gave the car 10 psi boost with no boost controller and a noticeable increase in boost response with boost coming right off the turbo outlet nipple. It's an old school trick that I'm surprised I haven't found one on this forum through the search feature (maybe a veteran will know?).

The stiffer spring will hold more boost longer with boost controllers with less spike. The spring has to be decently stiff but not too stiff or it will give too much boost on stock fuel systems. Too soft and you won't see a noticeable difference. Give it a try and you'll see.

I came from the SRT-4 world where the stock turbo wastegate would only put out 4 psi on full boost signal. This is what made boost increase so slowly and spike like crazy. The most common first upgrade is a wastegate actuator upgrade that solves this issue.

If you need pics I will try to snap some.

Also the previous posts on intake and exhaust upgrades are a must for a fast boost response. The stock exhaust and turbo outlet elbows are VERY restrictive. Open them up and it is a very noticeable gain.

 

[rodama5anthony]

I just did a mod for this 3 days ago. The stock wastegate actuator spring is just too soft. Throwing boost controllers at it will boost it up but the turbo will spike and settle back down to a lower boost. Shimming the wastegate with washers barely does much (I was using this setup since I installed a stock turbo upgrade). Iended up using a stiff spring and attached it to the stock turbo wastegate arm and bracket to give additional spring tension. This gave the car 10 psi boost with no boost controller and a noticeable increase in boost response with boost coming right off the turbo outlet nipple. It's an old school trick that I'm surprised I haven't found one on this forum through the search feature (maybe a veteran will know?).

The stiffer spring will hold more boost longer with boost controllers with less spike. The spring has to be decently stiff but not too stiff or it will give too much boost on stock fuel systems. Too soft and you won't see a noticeable difference. Give it a try and you'll see.

I came from the SRT-4 world where the stock turbo wastegate would only put out 4 psi on full boost signal. This is what made boost increase so slowly and spike like crazy. The most common first upgrade is a wastegate actuator upgrade that solves this issue.

If you need pics I will try to snap some.

Also the previous posts on intake and exhaust upgrades are a must for a fast boost response. The stock exhaust and turbo outlet elbows are VERY restrictive. Open them up and it is a very noticeable gain.

were did you get your stiffer spring from?

 

[suprastroker88]

3in exhaust with intergrated 3in elbow
intake
fmic with 2.5in piping

Try those first and then see if you want more anthony. you know you're not a speed demon so you'll probably be happy with those 3 mods for now lol

 

[suprarx7nut]

A stiffer spring will help, but its still a linear spring that starts to open early. You may lessen the problem, but its still there. Most electronic boost controllers are a basic pid controller.

A properly set up pid style boost controller can almost entirely eliminate the unnecessary boost lag. It will show the wastegate spring almost no pressure until you hit the Target pressure, then it snaps open with a speed you can control. And it will not have boost creep or boost loss if you tune it.

My greddy profec b spec 2 made a huge difference. I can feel the difference when I turn it on and off at the stock boost level. (7psi). I have no creep and boost climbs fast to 7 and holds steady through 3rd gear. If I do a pull up through 5th it starts to creep in 5th, but I should be driving that fast anyways...

Sent from my ADR6400L using Tapatalk

 

[T701jz]

SP Quick Spool valve

 

[ehall8017]

if you wanted to go all out your could port and polish the head and also build the block. the more displacement, the faster the spool

 

[Turbobox]

All I can say is "try it try it you will see". It's a cheaper than an e-boost controller that works. I've been in the turbo game a long time and I've used this mod on the cheap. E-boost controllers work even better with this.
I agree I think e-boost controllers are awesome to have but they are pricey.

To the OP, it's up to you.

Be safe everyone...

Turbo B.

 

[92ma71]

I shimmed the wastegate on my mine before I got the boost controller and with only intake and full exhaust I was running ten pounds. Didnt mess with the spring at all. There are many ways to do alot of things. Some right, some wrong and all up to whoevers car it is.

I like to have comeplete control over things. My AEM Tru boost knocked out buying a boost gauge and seperate boost controller all in one. Boost gauges are pricey alone.

 

[suprarx7nut]

All I can say is "try it try it you will see". It's a cheaper than an e-boost controller that works. I've been in the turbo game a long time and I've used this mod on the cheap. E-boost controllers work even better with this.
I agree I think e-boost controllers are awesome to have but they are pricey.

To the OP, it's up to you.

Be safe everyone...

Turbo B.

Agreed the new, tighter spring combined with exhaust and intake can make the car a whole new beast. Is the small gain from an E-boost controller worth the $200-400? Eh, even I'm not sure.

 

[hvyman]

Boost controllers do not control spool time. They just control how much boost you see.

The turbo size and housing size is what controls spool time. Quick spool valve will help great with spool time and not sacrifice any top end.

 

[T701jz]

lol

 

[suprarx7nut]

Boost controllers do not control spool time. They just control how much boost you see.

The turbo size and housing size is what controls spool time. Quick spool valve will help great with spool time and not sacrifice any top end.

Electronic boost controllers that can hold the wastegate closed until a select-able pressure most certainly DO affect spool. The stock wastegate opens progressively, opening fully at full boost. But the spring will open partially at less than full boost. That equates to lost power and a slower climb to peak boost. aka lag. Are you thinking of the super simple mechanical controllers? Or maybe an old, out-dated electronic boost controller?

Turbo sizing and quick spool valves certainly affect spool time and can have a much larger effect, but please explain to me how a controller which holds the linear spring controlled wastegate fully closed until near peak pressure does not affect spool time/turbo lag...

 

[92ma71]

Yep, Boost controllers control spring crack pressure. All this does is help to fine tune spooling etc.

 

[te72]

Can't add too much to this thread, but the turbo section is not gone, it's just been relocated. Look under the "member's builds" section (it's right under "introductions" itself). Here's a link...

http://www.supramania.com/forums/forumdisplay.php?109-Turbochargers

 

[rodama5anthony]

were would port and polishing help improve spoolup?

 

[7Matt-GE]

i would go the port and polishing...you push more air through the turbo that way. i guarantee you will see a lot of results from that.