Screw the EBC
#1
marky
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Screw the EBC
So my EBC's solenoid is dead.
I was wondering.. why not just use a larger wastegate spring? I'm sure there is some theory behind this and would like to know the benefits and downfalls of just putting a different wastegate spring in place of a boost controller (besides versatility in how much boost you want)?
For reference, I'm looking for 11-13psi on a TiAl 40mm wastegate. Right now it has a 7.5psi wastegate spring.
Thanks,
Mark
I was wondering.. why not just use a larger wastegate spring? I'm sure there is some theory behind this and would like to know the benefits and downfalls of just putting a different wastegate spring in place of a boost controller (besides versatility in how much boost you want)?
For reference, I'm looking for 11-13psi on a TiAl 40mm wastegate. Right now it has a 7.5psi wastegate spring.
Thanks,
Mark
#3
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EBC will let you tune the response more than a manual boost controller. Things like holding wastegate shut until preset boost pressure, holding steady boost throughout the powerband, and adjustability in the cockpit (multiple boost settings). Some advanced ones even let you modulate boost for different gears. There are many EBC's with many varying features. An electronic controller will do a better job than a manual one every time.
Solenoid failure you should look into where you are mounting it, vibrations and heat are good ways to kill it.
Simply swapping in a stronger spring will achieve the goal of increasing the boost, but running on wastegate alone the valve will start to open as soon as manifold pressure increases above atmospheric.
Solenoid failure you should look into where you are mounting it, vibrations and heat are good ways to kill it.
Simply swapping in a stronger spring will achieve the goal of increasing the boost, but running on wastegate alone the valve will start to open as soon as manifold pressure increases above atmospheric.
#4
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No down side, short of boost responce will be slightly slower. Porsche 911 turbo's have run that way for years. I run a 50mm HKS with a 1 bar spring, boost responce is very good with a T04E 57 trim .84 a/r.
Originally Posted by peachykeenwight
So my EBC's solenoid is dead.
I was wondering.. why not just use a larger wastegate spring? I'm sure there is some theory behind this and would like to know the benefits and downfalls of just putting a different wastegate spring in place of a boost controller (besides versatility in how much boost you want)?
For reference, I'm looking for 11-13psi on a TiAl 40mm wastegate. Right now it has a 7.5psi wastegate spring.
Thanks,
Mark
I was wondering.. why not just use a larger wastegate spring? I'm sure there is some theory behind this and would like to know the benefits and downfalls of just putting a different wastegate spring in place of a boost controller (besides versatility in how much boost you want)?
For reference, I'm looking for 11-13psi on a TiAl 40mm wastegate. Right now it has a 7.5psi wastegate spring.
Thanks,
Mark
#5
Rotary Motoring
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I have HKS GT 60mm WG.
When running the .8-1.2 bar spring (it has adjustment rod for that range on WG head) it would creep open slowly as boost increased as has been already mentioned.
This makes boost come on a bit slower and is LOUD even at lower boost levels w/ open wastegate.
In addition, with the adj HKS WG design it will only open ALL the way at the highest boost pressure (1.2 bar for the .8-1.2bar spring) so if your set-up needs the full flow of the WG as mine did it will run 1.2 bar no matter what.
Now I run the lowest boost spring made for the wastegate and a Hallman Pro manual boost controller w/ the stiff spring adjusted to raise the boost to 1 bar.
It works great! Always at 1 bar w/ no boost spikes. It also keeps the wastegate all the way shut untill very near peak boost so you can drive fast around town quietly by shifting just short of full boost.
When running the .8-1.2 bar spring (it has adjustment rod for that range on WG head) it would creep open slowly as boost increased as has been already mentioned.
This makes boost come on a bit slower and is LOUD even at lower boost levels w/ open wastegate.
In addition, with the adj HKS WG design it will only open ALL the way at the highest boost pressure (1.2 bar for the .8-1.2bar spring) so if your set-up needs the full flow of the WG as mine did it will run 1.2 bar no matter what.
Now I run the lowest boost spring made for the wastegate and a Hallman Pro manual boost controller w/ the stiff spring adjusted to raise the boost to 1 bar.
It works great! Always at 1 bar w/ no boost spikes. It also keeps the wastegate all the way shut untill very near peak boost so you can drive fast around town quietly by shifting just short of full boost.
#6
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Originally Posted by nik
EBC will let you tune the response more than a manual boost controller. Things like holding wastegate shut until preset boost pressure, holding steady boost throughout the powerband, and adjustability in the cockpit (multiple boost settings). Some advanced ones even let you modulate boost for different gears. There are many EBC's with many varying features. An electronic controller will do a better job than a manual one every time.
Solenoid failure you should look into where you are mounting it, vibrations and heat are good ways to kill it.
Simply swapping in a stronger spring will achieve the goal of increasing the boost, but running on wastegate alone the valve will start to open as soon as manifold pressure increases above atmospheric.
Solenoid failure you should look into where you are mounting it, vibrations and heat are good ways to kill it.
Simply swapping in a stronger spring will achieve the goal of increasing the boost, but running on wastegate alone the valve will start to open as soon as manifold pressure increases above atmospheric.
A good ball and spring type manual controller like the Hallman Pro will have great response. It will stay closed untill it needs to be opened.
I cant tell you how many cars Ive seen blow engines, not be able to be tuned, ect ect because thier EBC wasnt setup right, working right, going nuts, blah blah blah. Yea a lot of it might have been user error, but thats just the point, you dont have user error when its just 2 vac lines and a ****.
Stephen
Last edited by SPOautos; 10-13-06 at 05:33 PM.
#7
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Originally Posted by SPOautos
A good ball and spring type manual controller like the Hallman Pro will have great response. It will stay closed untill it needs to be opened.
I cant tell you how many cars Ive seen blow engines, not be able to be tuned, ect ect because thier EBC wasnt setup right, working right, going nuts, blah blah blah. Yea a lot of it might have been user error, but thats just the point, you dont have user error when its just 2 vac lines and a ****.
Stephen
I cant tell you how many cars Ive seen blow engines, not be able to be tuned, ect ect because thier EBC wasnt setup right, working right, going nuts, blah blah blah. Yea a lot of it might have been user error, but thats just the point, you dont have user error when its just 2 vac lines and a ****.
Stephen
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#8
marky
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Thanks for all the replies, guys.
Guess I'll just go back to the ole MBC. This damned 8 year old GReddy was getting annoying anyway.
Here's my next question: Should I just keep the 7.5 psi spring then? Or should I do both?
Guess I'll just go back to the ole MBC. This damned 8 year old GReddy was getting annoying anyway.
Here's my next question: Should I just keep the 7.5 psi spring then? Or should I do both?
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