My new boost control idea

[punkrokdood]

Well, its hardly new, and its modified from what several others have done. Basically, my idea is to be able to drive around on factory boost control most of the time, then flip a switch, and run high boost. This won't work the greatest since my car pulls timing really hard at the onset of boost when i run 20 psi with a boost controller. So, my idea is instead of running my manual boost controller, i'll have a switch that switches between factory boost control and my electronic boost controller. My EBC has a gain control so i can slow down the spool slightly, and hopefully keep the computer from freaking out with a huge boost spike. The EBC has a low and high boost setting also, so i can have a factory mode, "sprited driving on pump gas" mode, and a race gas mode, which will come in handy if i ever do a ported turbo. I can also use it as kind of a traction control by using factory boost in first and second, then switching to the high boost mode in 3rd. Here is my basic diagram.

http://img.photobucket.com/albums/v651/punkrokdood/newvacuumlines.jpg

[The-Violator]

Yeah that's not new.. Just you added a ebc rather than a mbc.. I tried it once.. I couldn't get it to work right with my EBC for whatever reason.. Best of luck to ya though..

[svt2srt4]

this is kinda what i was thinking of...but seems a bit complicated...so im going with a dual stage mbc with a switch to kick it into high boost....:ftard:

[punkrokdood]

Yeah that's not new.. Just you added a ebc rather than a mbc.. I tried it once.. I couldn't get it to work right with my EBC for whatever reason.. Best of luck to ya though..
its based off the the 91cavgt auto dual stage, which i tried, and couldn't get to work to my liking. this set up makes it so it will ALWAYS be under factory control unless i manually switch it over. I've noticed recently that i'm not boosting as high (factory lines) so its either learning my WGA, or its the bad spark plugs, and the pcm is pulling boost. anyway, jsut driving around, i don't care how much i boost since i'm jsut driving. i'm hoping that using the EBC will give me the ability to not spike so fast and so hard that it pulls timing all the way to 9 degrees at the onset of boost :ftard:

i do remember that the EBC on low boost (everything set to 0) seemed to drive pretty well on its own, so i may end up on that too if i can get the high boost to operate correctly

[punkrokdood]

this is kinda what i was thinking of...but seems a bit complicated...so im going with a dual stage mbc with a switch to kick it into high boost....:ftard:
basically, this set up gives me 3 stages. 1 is stock, then low on the ebc, and high on the ebc. stock lines are AWESOME for driveability, but suck for power, especially top end. i'm thinking that this way, i can keep driveability when i need it, but still get the power when i want it. the auto dual stage just never worked like i wanted it too. it still gave me the same amount of part throttle boost, it jsut spooled up a little bit slower

[svt2srt4]

basically, this set up gives me 3 stages. 1 is stock, then low on the ebc, and high on the ebc. stock lines are AWESOME for driveability, but suck for power, especially top end. i'm thinking that this way, i can keep driveability when i need it, but still get the power when i want it. the auto dual stage just never worked like i wanted it too. it still gave me the same amount of part throttle boost, it jsut spooled up a little bit slower
at closer inspection it seems like it would work...could be costly for someone to do if starting from scratch , but since you have some of the parts it should be cheaper...but couldnt you just get a clamp or something to hide the boost from the ecu so as to not have the timing pulled and then you could just go with my much simpler idea of the dual stage mbc with switch...:hit:

[punkrokdood]

at closer inspection it seems like it would work...could be costly for someone to do if starting from scratch , but since you have some of the parts it should be cheaper...but couldnt you just get a clamp or something to hide the boost from the ecu so as to not have the timing pulled and then you could just go with my much simpler idea of the dual stage mbc with switch...:hit:
no. its not pulling timing up top, its pulling timing because its coming on too fast. if it was being pulled up top, then a clamp could help. i need the boost to come on a LITTLE bit slower so it doesn't ruin the curve

[svt2srt4]

no. its not pulling timing up top, its pulling timing because its coming on too fast. if it was being pulled up top, then a clamp could help. i need the boost to come on a LITTLE bit slower so it doesn't ruin the curve
so what are you going to do when you buy all the crap to do it your way and it doesnt work to your liking?:rofl: :rofl:

[punkrokdood]

so what are you going to do when you buy all the crap to do it your way and it doesnt work to your liking?:rofl: :rofl:
all i'm missing is the switch :lol:

remember, i already did the 91cavgt auto dual stage, and didn't like it :thumb:

[svt2srt4]

all i'm missing is the switch :lol:

remember, i already did the 91cavgt auto dual stage, and didn't like it :thumb:
are you on a mission to own every performance mod compatible with your car?:rofl: :rofl: :rofl:

[punkrokdood]

are you on a mission to own every performance mod compatible with your car?:rofl: :rofl: :rofl:
and then some... :lol:

no, i just have certain things that i want, and I'll never be happy until i get that set up. then once i'm there, it'll be time for a new turbo, and i'll start all over again :thumb:

[svt2srt4]

and then some... :lol:

no, i just have certain things that i want, and I'll never be happy until i get that set up. then once i'm there, it'll be time for a new turbo, and i'll start all over again :thumb:
good then you can sell me your old setup...:thumb:

[punkrokdood]

good then you can sell me your old setup...:thumb:
:rofl: :rofl: :rofl:

MOST of the mods i have will carry over no matter what i get down the road :thumb:

[StreetRaceGN]

Seems like you're overcomplicating things. What upgrades are available in regards to wastegate regulation for SRTs? If we get bad spike, etc. on other turbo 6 and V8 cars I work on, it's usually a case of too small of a flapper valve on internal gates and too small of a gate orifice on an external. With the location of the flapper on an SRT, is it possible to enlarge the hole and install a larger "puck"(flapper valve)? I'm sure it would definitely help in boost regulation.

[punkrokdood]

Seems like you're overcomplicating things. What upgrades are available in regards to wastegate regulation for SRTs? If we get bad spike, etc. on other turbo 6 and V8 cars I work on, it's usually a case of too small of a flapper valve on internal gates and too small of a gate orifice on an external. With the location of the flapper on an SRT, is it possible to enlarge the hole and install a larger "puck"(flapper valve)? I'm sure it would definitely help in boost regulation.
I'm sure it could be done, in a custom way, but its not something that has been done in the past

the real solution is a bigger turbo, but, that's $1600+ away, where-as this mod is one swtich away... it is a band aid for an undersized turbo...

[StreetRaceGN]

If someone local will sacrifice a weekend, I'd like to take one apart to see what could be done about it. I also have a few different manual and electronic boost controllers to test.

[punkrokdood]

If someone local will sacrifice a weekend, I'd like to take one apart to see what could be done about it. I also have a few different manual and electronic boost controllers to test.
honestly, outside of porting and clipping, there isn't much that can be done with them. they are jsut entirely way too small for a 2.4 liter engine. They should have come stock with the stage3 turbo, then been upgraded from there

[The-Violator]

honestly, outside of porting and clipping, there isn't much that can be done with them. they are jsut entirely way too small for a 2.4 liter engine. They should have come stock with the stage3 turbo, then been upgraded from there

OMG could you imagine the ownage that we would put forth if they all came with the S3 turbo. They would probably only have it only boosting like 6lbs to keep the 230hp rating though.. haha Then WhiteMtn could say he hit 10's on the stock turbo.. :rofl:

[liteshow]

Why not just use a hobbs switch? From my understanding it works off vaccuum and as you progress it opens up which in turn opens up the boost controller.

[The-Violator]

Why not just use a hobbs switch? From my understanding it works off vaccuum and as you progress it opens up which in turn opens up the boost controller.

Yeah that's what I tried using.. Couldn't get it to work right.. I think I just messed something up along the way though..

[Broken5hift]

we need to get 91cavgt over here

[punkrokdood]

Why not just use a hobbs switch? From my understanding it works off vaccuum and as you progress it opens up which in turn opens up the boost controller.
i did... like i said before, all it did was slow down the spool when i hit the gas, which is a good thing, but i still had the SAME amount of part throttle boost as i did with just the MBC to WGA.

[blackbird]

With the location of the flapper on an SRT, is it possible to enlarge the hole and install a larger "puck"(flapper valve)? I'm sure it would definitely help in boost regulation.The size of the flapper isn't a problem on the SRT-4, it's the exhaust housing side and small turbine that causes a sharp ramp up in boost. Because of the small turbine side you have to run high pre-load/spring tension on the WGA in order to hold boost up top in the rev range (to keep the flapper shut against rising backpressure) which can cause problems with spiking down low, depending on the boost control setup.



i did... like i said before, all it did was slow down the spool when i hit the gas, which is a good thing, but i still had the SAME amount of part throttle boost as i did with just the MBC to WGA.
I'd be curious to see how you had it set up. Did you change the adjustment on the Hobbs switch as to when it switched over?


There's quite a few things you can try to do with small turbos. My minivan spools faster than an SRT-4 and isn't too bad with PTB, but it does have an automatic. I'm going to checking into pulling a boost control setup from another car if I can find one in the junk yard this weekend. Think factory electronic boost controller with adjustable boost retard on knock. :evil2:

[gudeman00]

Not to hijack the thread, but I put my MBC back in the car on Monday and for now it's set at 16-14. Using the throttle body as my boost source.

My question - I no longer have to give it any gas to get it in gear. It will stall a little bit but it can go into gear just fine without dying if I let off the clutch slow enough. Obviously this is from teeing into the throttle body, so do I just need to tighten all of my connections, or do I need to adjust my clutch pedal to get it like it was before?

[punkrokdood]

^^^
marcus, i was able to do that bone stock in 1st through 3rd :lol:

just letting it out of the clutch slowly enough, i was able to do that

[gudeman00]

^^^
marcus, i was able to do that bone stock in 1st through 3rd :lol:

just letting it out of the clutch slowly enough, i was able to do that

Haha, I think I alreayd knew that you were able to. I wasn't though, and I don't like the change.

Hell I also got my stock tires put back on this week and now it pulls to the left. I don't like that either :owned:

[punkrokdood]

Haha, I think I alreayd knew that you were able to. I wasn't though, and I don't like the change.

Hell I also got my stock tires put back on this week and now it pulls to the left. I don't like that either :owned:
pulling to the left sucks :lol:

i don't know what to tell you about the clutch though... i can still do it... you sure that you just didn't notice it before? maybe its jsut easier to do now, but was still possible before.

i like being able to leave it in 1st mainly for stop and go traffic (fuckin cali :ftard:) that way i'm not constantly riding on the clutch

[gudeman00]

pulling to the left sucks :lol:

i don't know what to tell you about the clutch though... i can still do it... you sure that you just didn't notice it before? maybe its jsut easier to do now, but was still possible before.

i like being able to leave it in 1st mainly for stop and go traffic (fuckin cali :ftard:) that way i'm not constantly riding on the clutch

Yeah, since it needs aligned I might just order a set of springs and have them installed that way my alignment serves more of a purpose. Needs lowered anyway.

I'm sure I didn't notice before. It would die if I let off the clutch with it still stock. It's way too much of a change for me to not notice it then but notice it now. I'm pretty sure there's a way to adjust the clutch pedal, I'll just have to climb down there and look sometime I guess.