What size Wastegate? For ATV
08-11-2008, 05:21 PM
#1
0.5 BAR
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Join Date: Aug 2008
Posts: 50
What size Wastegate? For ATV
First time Poster!
Need some info here.... still learning about the turbo stuff.
Right now on my 700 Rappy... I am running a gt28 at 8psi of boost, internal wastergate. I want to switch over to an external waste gate and run in the high teens PSI.... but not sure yet if I'm going to be switching to a gt20 or not.
Does anyone know what size, or around what size waste gate to get?
And which are good brands? Do they all require new springs to work with a PSI, or are some of them adjustable on the fly? (just in case someone beats me
)
Here are some pics of my setup now
Tony
Also if someone wants to trade a GT28 for a gt20 Lemme know....
Need some info here.... still learning about the turbo stuff.
Right now on my 700 Rappy... I am running a gt28 at 8psi of boost, internal wastergate. I want to switch over to an external waste gate and run in the high teens PSI.... but not sure yet if I'm going to be switching to a gt20 or not.
Does anyone know what size, or around what size waste gate to get?
And which are good brands? Do they all require new springs to work with a PSI, or are some of them adjustable on the fly? (just in case someone beats me
)Here are some pics of my setup now
Tony
Also if someone wants to trade a GT28 for a gt20 Lemme know....
08-11-2008, 06:36 PM
#3
0.5 BAR
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Join Date: Aug 2008
Posts: 50
Re: What size Wastegate? For ATV
Originally Posted by SloS13
That's badass. Why not just hook up an MBC? If you really want an external gate, a 38mm Tial or Tial knock-off would be fine. Turbonetics Deltagates are adjustable but that's gay.
What is a MBC?
08-11-2008, 06:59 PM
#5
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Join Date: Aug 2008
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Re: What size Wastegate? For ATV
Thank you for answering my questions 
I am looking at this wastegate on ebay
http://cgi.ebay.com/ebaymotors/UNIVE...=1218490855250
Would this one hold up for 10 hours? That's about how much I ride my bike a year.
And does the flange just weld to my exhaust, and I drill a hole out? Is there any kind of dump needed for this style wastegate?
Opinions?
I am looking at this wastegate on ebay
http://cgi.ebay.com/ebaymotors/UNIVE...=1218490855250
Would this one hold up for 10 hours? That's about how much I ride my bike a year.
And does the flange just weld to my exhaust, and I drill a hole out? Is there any kind of dump needed for this style wastegate?
Opinions?
08-11-2008, 07:51 PM
#6
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Join Date: Apr 2004
Posts: 0
Re: What size Wastegate? For ATV
That would do you just fine but like I said, with a $15 MBC you could do at least 14-15psi no problem and wouldnt have to weld/cut anything. Literally a 30-second install.
MBC bleeds of some of your boost and "hides" it from the wastegate, making the gate open later.
If you want to install the external gate it needs to be on the manifold before the turbo, preferably in such a way where all of the runners get a semi-equal shot at expelling exhaust through the gate. You don't *have* to make a dump tube but that ---- is hot and will melt stuff.
Unless you're shooting for some god-awful power, just do the MBC. You'll want to get one for tuning your pressure anyways so go ahead and just buy one first.
MBC bleeds of some of your boost and "hides" it from the wastegate, making the gate open later.
If you want to install the external gate it needs to be on the manifold before the turbo, preferably in such a way where all of the runners get a semi-equal shot at expelling exhaust through the gate. You don't *have* to make a dump tube but that ---- is hot and will melt stuff.
Unless you're shooting for some god-awful power, just do the MBC. You'll want to get one for tuning your pressure anyways so go ahead and just buy one first.
08-11-2008, 08:03 PM
#7
0.5 BAR
Thread Starter
Join Date: Aug 2008
Posts: 50
Re: What size Wastegate? For ATV
Originally Posted by SloS13
That would do you just fine but like I said, with a $15 MBC you could do at least 14-15psi no problem and wouldnt have to weld/cut anything. Literally a 30-second install.
MBC bleeds of some of your boost and "hides" it from the wastegate, making the gate open later.
If you want to install the external gate it needs to be on the manifold before the turbo, preferably in such a way where all of the runners get a semi-equal shot at expelling exhaust through the gate. You don't *have* to make a dump tube but that ---- is hot and will melt stuff.
Unless you're shooting for some god-awful power, just do the MBC. You'll want to get one for tuning your pressure anyways so go ahead and just buy one first.
MBC bleeds of some of your boost and "hides" it from the wastegate, making the gate open later.
If you want to install the external gate it needs to be on the manifold before the turbo, preferably in such a way where all of the runners get a semi-equal shot at expelling exhaust through the gate. You don't *have* to make a dump tube but that ---- is hot and will melt stuff.
Unless you're shooting for some god-awful power, just do the MBC. You'll want to get one for tuning your pressure anyways so go ahead and just buy one first.
08-11-2008, 09:26 PM
#9
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Join Date: Apr 2006
Posts: 0
Re: What size Wastegate? For ATV
its a spring pressing on a ball bearing increasing the amount of manifold pressure, by keeping lower pressure from pushing that ball bearing out of place and letting pressure go by. it just lets less by basically. sorta like using a smaller tip on a garden hose. higher pressure.
08-11-2008, 09:42 PM
#10
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Join Date: Aug 2008
Posts: 50
Re: What size Wastegate? For ATV
Originally Posted by txdohczc
boost line-----------------------mbc----------------------------w/g. thats how you hook it up. tee the signal for your w/g and put the mbc where you tee'd. simple
And does a MBC work with an internal wastegate?
