[TurboQueef]

After another somewhat disappointing trip to the track I decided to tinker with the wastgate helper spring (thanks to jaygoesfast). I customized a 19.1 lbs spring that I bought from Home Depot (part # SP-9618) to fit as shown at the bottom of this post.

After I installed the spring I had to:

1. Lower the high WGDC values then slowly increase to hit my targets
2. Increase fuel at the mid-high RPM range

I have posted a few logs for comparison along with the realtime map I am using now.

[WolfPlayer]

Nice documentation. Well done! I have the 9 and 11lb springs sitting in my trunk. I'm not going to try any springs until after the EBCS is installed ... oh yea, I better get off my butt and order it - lol.


t

[TurboQueef]

Originally Posted by WolfPlayer

Nice documentation. Well done! I have the 9 and 11lb springs sitting in my trunk. I'm not going to try any springs until after the EBCS is installed ... oh yea, I better get off my butt and order it - lol.


t

When you get off your but and order yours ,,,, could you order mine too? (my wife has caught up to all of my spending $$$ no more this year :-)

[WolfPlayer]

Originally Posted by TurboQueef

When you get off your but and order yours ,,,, could you order mine too? (my wife has caught up to all of my spending $$$ no more this year :-)

I still gotta get my order by my wife too I'm slowly accumulating a trunkful of parts. Maybe I should take them in the house - rofl. Walbro, wastegate springs, soon-to-be EBCS. I'll call it the trunk-o-mods. Oh, and I have a case of M1R sitting in there now too - lol.

EDIT: Screw it I just placed the order.

t

[RacerXS]

Glad to know i'm not alone on this deception tactic.

[WolfPlayer]

There is no deception on my part. Big parts - definitely a no go. Has to be a discussion with the wife. Little stuff - I just buy it here and there after telling her I am going to order up something small for myself. For me, the key is to have discussions about the bigger items and then only do the little things every now and then. We just bought a new house so our financial situation is tight tight tight. Next thing I REALLY want are injectors. But, I have no idea how to swing that. I am thinking that injectors will be my only mod in 2006. After injectors then I will be fully setup for a new turbo. I will have everything that I need.

t

[TurboQueef]

Originally Posted by WolfPlayer

There is no deception on my part. Big parts - definitely a no go. Has to be a discussion with the wife.

I have to admit, I am a bad boy when it comes to bringing things home without much discussion... like the STI for example, it appeared in the garage on March 30th, this caused a slight disturbance for a few weeks (well a month anyway)

FYI... the spring is holding up just fine.. no trouble even in the heat wave moving through MI. I plan to hit the track next Friday and will post 1/4 mile results.

J B

[gt42sti]

In the case of the helper spring. Do you think the ability to control boost is hampered in any way? For example, in a drag racing situation and attempting to gain more boost in the lower gears....will the car overboost in the higher gears? Will the WG duties react fast enough to keep a handle on boost in the higher gears??

Ok, contrast that to the Perrin EBC replacement. You can have a true EBC where the solenoid can be placed in the full block mode where no bypass boost reaches the WG until the solenoid opens to allow it.

[TurboQueef]

Originally Posted by gt42sti

In the case of the helper spring. Do you think the ability to control boost is hampered in any way? For example, in a drag racing situation and attempting to gain more boost in the lower gears....will the car overboost in the higher gears? Will the WG duties react fast enough to keep a handle on boost in the higher gears??

Ok, contrast that to the Perrin EBC replacement. You can have a true EBC where the solenoid can be placed in the full block mode where no bypass boost reaches the WG until the solenoid opens to allow it.

My experience is that the boost can be controlled using engine management software so I do not think control is hampered in any way by installing the spring as long as proper tuning is performed after the install.

Key point: If you don't tune you may (I did) experience over-boost and or the dreaded BOOST CREEP (one in the same really).

Regarding the Perrin EBC, I actually decided to make the spring mod based on e-mail correspondence from jaygoesfast who is running very quick and fast 1/4 mile times. He is using both the EBCS and the helper spring, this along with some other mods is providing him with even more stock turbo boost at high RPM range. I plan to install the Perrin EBCS next year (wife has my part buying budget on hold for the rest of this year :-)

Wolfplayer has just installed the EBCS, are you following his posts? I am sure he will provide good data about the performance gains. Here is the link: http://www.iwsti.com/forums/showthread.php?t=32652

[gt42sti]

TQ- I worked on the 11lb helper spring setup. Well, first shot hit boost to 20psi by 3100rpm. Yeeks, clamped that wg down even more and now we are hitting 18.5 by 3100, load values in the 3.1-3.2 range. Holding 3.0 load values to 5500rpm and boost levels holding 18psi. No creep and no spike with the 11lb spring and working on the WG duties to smooth things out. This is all on the stock solenoid.

[ride_the_pony69]

Originally Posted by TurboQueef

After another somewhat disappointing trip to the track I decided to tinker with the wastgate helper spring (thanks to jaygoesfast). I customized a 19.1 lbs spring that I bought from Home Depot (part # SP-9618) to fit as shown at the bottom of this post.

After I installed the spring I had to:

1. Lower the high WGDC values then slowly increase to hit my targets
2. Increase fuel at the mid-high RPM range

I have posted a few logs for comparison along with the realtime map I am using now.

Ok so now the helper spring lets you be able to hold the door closed better so you can get more boost with out it bleeding off? I would like to know about this cuz I am staying internally gated and would like to know how to hold more boost. I heard you can adjust the actuator arm or use a helper spring.

[TurboQueef]

Originally Posted by ride_the_pony69

Ok so now the helper spring lets you be able to hold the door closed better so you can get more boost with out it bleeding off? I would like to know about this cuz I am staying internally gated and would like to know how to hold more boost. I heard you can adjust the actuator arm or use a helper spring.

Yea, the spring just helps hold the door shut. To be honest, I am starting to wonder how much actual performance this is giving me. The reason I am questioning: My friend (overdose) has run quicker and faster than I in the 1/4. He is not running a helper spring but he does have a pro-tune. He is getting very close to the same boost that I am getting with the spring. I am thinking that by adjusting the low and high WGDC values you can get the same performance as using the waste gate helper spring. One of these days, I will remove the spring and prove this out but I want to save my current state of tune for the race next weekend at Norwalk

Good luck

Jeff B

[TurboQueef]

Originally Posted by ride_the_pony69

...

With those mods what are you running in the 1/4 mile? (ET & MPH)

Engine Management: Cobb AP Protuned
Helix 860cc injectors
Walbro 255 fuel pump
Engine: FP 20G turbo
Injen FMIC
Perrin short ram intake
Perrin turbo inlet hose
Invidia Downpipe
HKS High Power Catback Exhaust
SMC Alcohol injection
Worx adjustable BOV
Perrin EBCS
NGK One step colder spark plugs
Drivtrain: Spec stage 3 clutch

[ride_the_pony69]

Originally Posted by TurboQueef

With those mods what are you running in the 1/4 mile? (ET & MPH)

Engine Management: Cobb AP Protuned
Helix 860cc injectors
Walbro 255 fuel pump
Engine: FP 20G turbo
Injen FMIC
Perrin short ram intake
Perrin turbo inlet hose
Invidia Downpipe
HKS High Power Catback Exhaust
SMC Alcohol injection
Worx adjustable BOV
Perrin EBCS
NGK One step colder spark plugs
Drivtrain: Spec stage 3 clutch

Fastest so far was a 12.6 @ 111mph. I know it could do faster but I only ran once that night. I can do a 7.8 in the 1/8 mile though.

So my actuator has only a 15psi spring in it, if I put a helper spring on it will I be able to run more boost without out the door coming open?

[TurboQueef]

Originally Posted by ride_the_pony69

Fastest so far was a 12.6 @ 111mph. I know it could do faster but I only ran once that night. I can do a 7.8 in the 1/8 mile though.

So my actuator has only a 15psi spring in it, if I put a helper spring on it will I be able to run more boost without out the door coming open?

That is a good MPH... I bet your 60' was a bit slow (1.880 or so??).. with a better 60' that MPH would provide 12.50's or a bit lower... what was the 60' time?

Regarding the helper spring, it may get you more boost but not a bunch. I can get 15.3 or so with the helper spring...that is all.

One thing is for sure, if you put the helper spring in you will get mega boost spikes until your tune is adjusted.

I have attached a data log from last night, you can see the boost I am getting with the helper spring. FYI.. was running 93 octane