Thinking about adding a wastegate to my setup. D1SC...
Thinking about adding a wastegate to my setup. D1SC... I was thinking today about my setup and what i could do to make it a little more fun. I was thinking about adding a wastegate to my intake charge piping and adding a boost controller along with a 3.4" pulley to my D1. That way i can limit the boost to 8psi, but i can have it come in quickly because of the small pulley...hopefully around 2800rpm or so. right now im making like 5.7psi at 6500rpm and I make 571rwhp right now with a 4.38" pulley. So i figured if i made 8psi at 2800ish rpm and held that psi to redline, i could make a lot more torque and up the hp to about 620ish. A 3.4" pulley would normally make around 18psi or so on stock cubes and my setup i would think. Id like to get your guys' opinions about this. I may add a meth kit also for some safety of course. This is my theory anyway lol...
Its been done several times to centrifugal setups...its no theory.
Basically gives you a power-band mirroring a turbo, but with belt drivin loss.
Its beneficial for a few reasons, but with some drawbacks.
a) no more hundred dollar pulley changes and 50 buck belt changes
b) gobs more tq lower rpm
remember, this will drastically increase your cylinder pressure at lower rpms, so make sure your engine is built for this.
IATs will increase quite a bit, again, make sure your intercooler is setup to handle the boost
If you are bypassing to atmosphere with the surge valve, it will be **** loads louder at the lower rpms on light throttles.
So, yea, waste-gate / boost controller... max out blower impeller rpm, dial in your desired boost level...
Doing it this way is in my opinion the way to go...
Basically gives you a power-band mirroring a turbo, but with belt drivin loss.
Its beneficial for a few reasons, but with some drawbacks.
a) no more hundred dollar pulley changes and 50 buck belt changes
b) gobs more tq lower rpm
remember, this will drastically increase your cylinder pressure at lower rpms, so make sure your engine is built for this.
IATs will increase quite a bit, again, make sure your intercooler is setup to handle the boost
If you are bypassing to atmosphere with the surge valve, it will be **** loads louder at the lower rpms on light throttles.
So, yea, waste-gate / boost controller... max out blower impeller rpm, dial in your desired boost level...
Doing it this way is in my opinion the way to go...
It also increase the drive loads on your supercharger a ton. So much so, that if you didn't have belt issues before, you may on the 'lower' boost setting. It depends on how much boost you are bleeding off.
11 Second Club
Joined: Nov 2006
Posts: 499
Likes: 0
From: saint louis Missouri
I would just pulley down and run a restricter on the inlet side of the blower. you will get the same benifits without the cost of the wastegate and boost controller. Take the restrictor out and boom you get alot more power in the top end. think about it this way. you know how dynos look when they have maxed d1 and bad inlet hat. Same idea pulley down put a restrictor say a plate with 2 1/2 inch hole in the center. you will have to do some research and see what other people have done. size wise and pulley size.
Nothing that an astern bracket can't cure right ? How much more would the cylinder pressure be at 8psi?just tryin to get some ideas on how to do this effectively. Forged bottom be necessary?
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Verdad Gallardo I would just pulley down and run a restricter on the inlet side of the blower. you will get the same benifits without the cost of the wastegate and boost controller. Take the restrictor out and boom you get alot more power in the top end. think about it this way. you know how dynos look when they have maxed d1 and bad inlet hat. Same idea pulley down put a restrictor say a plate with 2 1/2 inch hole in the center. you will have to do some research and see what other people have done. size wise and pulley size.
i think a wategate is a couple hundred. The eboost2 is like $469, and a pulley is $80 new. Plus a retune. I like the restrict plate idea though.
11 Second Club
Joined: Nov 2006
Posts: 499
Likes: 0
From: saint louis Missouri
I never thought of that. Im worried about the increased cylinder pressure, but at the same time there are guys running 76mm turbo and making gobs of torque down low on stock bottoms and only running 8psi, wouldnt it b the same thing for a S/C. I have no idea how big of a hole i would need or what size pulley to run. I've never seen a thread on a restrict plate before.
i think a wategate is a couple hundred. The eboost2 is like $469, and a pulley is $80 new. Plus a retune. I like the restrict plate idea though.
i think a wategate is a couple hundred. The eboost2 is like $469, and a pulley is $80 new. Plus a retune. I like the restrict plate idea though.
I never thought of that. Im worried about the increased cylinder pressure, but at the same time there are guys running 76mm turbo and making gobs of torque down low on stock bottoms and only running 8psi, wouldnt it b the same thing for a S/C. I have no idea how big of a hole i would need or what size pulley to run. I've never seen a thread on a restrict plate before.
i think a wategate is a couple hundred. The eboost2 is like $469, and a pulley is $80 new. Plus a retune. I like the restrict plate idea though.
i think a wategate is a couple hundred. The eboost2 is like $469, and a pulley is $80 new. Plus a retune. I like the restrict plate idea though.
But this gives you the ability to change your boost literally while driving. Its like nitrous - full throttle, guy next to you is pulling away, hit one button and instantly have 100 more HP. Thats what we did on my turbo car with the eboost 2. Check out this graph:
like others have said, its more work on the S/C but if youre talking low boost levels, its no biggie. If youre toggling between 25 & 20lbs, then yeah, you might have an issue overheating the unit. The eboost 2 can also control Meth injection. You can also compensate for boost dropoff at any RPM
Their intended for regulating exhaust pressure (ie. flow through the turbo), but with a little diaphragm pressure regulation magic and a spring change you can get them to pretty much regulate the pressure on whatever you want.
5+ year old article, but it delivers the point of going this route...
I would advise to just spend the few bucks and have a controller and wastegate, rather than using restriction plate which only put pressure on the parts, impeller, crank snout, belt etc and isnt available to have on a switch..
http://www.musclemustangfastfords.co...all/index.html
I would advise to just spend the few bucks and have a controller and wastegate, rather than using restriction plate which only put pressure on the parts, impeller, crank snout, belt etc and isnt available to have on a switch..
http://www.musclemustangfastfords.co...all/index.html
In a centrifugal, you run the usual Bypass valve, but then can create the same induction characteristics of a turbo when controlling the boost via a wastegate (which has a psi release)...
the controller just adds the ability to adjust the boost you wish to target.
All turbos are doing, based on A/R of course, are spinning as fast as they can... the wastegate controls the pressure in the intake.
There are factors to consider, such as belt slippage, max bearing (centri) impeller rpm, noise, increase temp of charged air.
This gets into what I always argue about dynoing with turbos... since the wastegate always allows a certain psi... the dyno should only be uncorrected values only. as 13psi is generated at 4000ft or if you are below MSL (mean sea level)... always 13psi.. this is pending you are within the compressor mapping range. The only difference is amount of impeller turns to gather the thinner air.. changing the curve, but never the peak.
Anyways.. shouldnt get into that...
I have never done the boost controller, have seen it done... and its definitely on my list of to dos on my personal car.
11 Second Club
Joined: Nov 2006
Posts: 499
Likes: 0
From: saint louis Missouri
5+ year old article, but it delivers the point of going this route...
I would advise to just spend the few bucks and have a controller and wastegate, rather than using restriction plate which only put pressure on the parts, impeller, crank snout, belt etc and isnt available to have on a switch..
http://www.musclemustangfastfords.co...all/index.html
I would advise to just spend the few bucks and have a controller and wastegate, rather than using restriction plate which only put pressure on the parts, impeller, crank snout, belt etc and isnt available to have on a switch..
http://www.musclemustangfastfords.co...all/index.html
Teching In
Joined: Feb 2011
Posts: 43
Likes: 0
If I can chime in here, I personally would rather use a BOV to achieve this.
The plumbing configuration will be a bit different but a BOV will seal much better on the "cold side" than a waste gate will and it will be MUCH lighter = less stress on the intake tubing.
That being said, there are quite a few guys running a wastegate just as you are asking about (as well as turbo guys) and this is one of the reasons we make alloy flanges for most of our (Turbosmart) gates.
The plumbing configuration will be a bit different but a BOV will seal much better on the "cold side" than a waste gate will and it will be MUCH lighter = less stress on the intake tubing.
That being said, there are quite a few guys running a wastegate just as you are asking about (as well as turbo guys) and this is one of the reasons we make alloy flanges for most of our (Turbosmart) gates.
Another article:
http://www.gmhightechperformance.com...ate/index.html
the gains of doing this is substantial.
http://forums.corvetteforum.com/c5-f...p-is-done.html
http://www.gmhightechperformance.com...ate/index.html
the gains of doing this is substantial.
http://forums.corvetteforum.com/c5-f...p-is-done.html
Last edited by vmapper; May 24, 2012 at 11:46 AM.