wabaki

just wondering is it possible to use a single wastegate set-up on a twin entry turbo??

almost all the cars running twin entry t4's here in H-T are running a twin wastegate set up.

not trying to cheap out or anything just thinking of using a single tial 60mm over twin 38's (less parts less maintenance) since i wouldnt mind routing 2 pipes to a single wastegate

your insights plz


im talking about set manifolds like these



Modified by wabaki at 6:08 AM 5/6/2008

chimmike

first, what kind of power are you looking to make?

robbieshonda

Thw run 2 waste gates because it is a twin scroll turbo 2 exhaust ports per entry, to run a single wastegate would mean that you would be running all 4 runners to that port then to the turbo. Therefor defeating the purpose of having a twin scroll turbo.

turbotypeR@SPEC

i am using a single 60mm on my twin scroll manifold. i am using two runners to it with a divider all the way to the valve and it works better than any wastegate setup combo i have ever used.

I.C.C.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by robbieshonda &raquo;</TD></TR><TR><TD CLASS="quote">Thw run 2 waste gates because it is a twin scroll turbo 2 exhaust ports per entry, to run a single wastegate would mean that you would be running all 4 runners to that port then to the turbo. Therefor defeating the purpose of having a twin scroll turbo.</TD></TR></TABLE>

why would it defeat the purpose of running a twin scroll turbo??? even on a twin wastegate setup, both wastegates reference the same source and open at the same time, so how is that any different then just routing both sides to one gate???

wabaki

chimike, 800whp which is more than enough for a tial 60mm

turbotypeR@spec, any pictures?? pls post pics of your manifold

I.C.C., we are on the same page here

turbotypeR@SPEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wabaki &raquo;</TD></TR><TR><TD CLASS="quote">chimike, 800whp which is more than enough for a tial 60mm

turbotypeR@spec, any pictures?? pls post pics of your manifold

I.C.C., we are on the same page here</TD></TR></TABLE>
not great pics, but here you go:

robbieshonda

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by I.C.C. &raquo;</TD></TR><TR><TD CLASS="quote">
why would it defeat the purpose of running a twin scroll turbo??? even on a twin wastegate setup, both wastegates reference the same source and open at the same time, so how is that any different then just routing both sides to one gate???</TD></TR></TABLE>

Bad info was thinking something else. Thanks for pointing that out. We are running twin 44mm with a 40r turbo on one car was thinking about running a single larger wg. But the Mani was only offered in twin wg.

OP:What manifold are you running? and what turbo? The one in the pic looks like a fullrace topmount with twin 44's which would be over kill on a smaller turbo 30r or smaller.

But from the little time I spent looking into it there is a small bit of backpressure from running a single wg but nothing major.

wabaki

Turbotyper@spec thank you for the pics that car is insane what turbo are you using

robbieshonda, il be running an s372

i might try running a single wastegate glad to see some real world testing

TiAL

i wouldn't advise a 60, it's huge and the highest spring pressure is only 1.048bar so unless you want to run very low boost or use C02, stick with the 44...one 44 with proper placement/priority will be fine

turbotypeR@SPEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wabaki &raquo;</TD></TR><TR><TD CLASS="quote">Turbotyper@spec thank you for the pics that car is insane what turbo are you using

robbieshonda, il be running an s372

i might try running a single wastegate glad to see some real world testing</TD></TR></TABLE>
bullseye 372 r cover

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TiAL &raquo;</TD></TR><TR><TD CLASS="quote">i wouldn't advise a 60, it's huge and the highest spring pressure is only 1.048bar so unless you want to run very low boost or use C02, stick with the 44...one 44 with proper placement/priority will be fine</TD></TR></TABLE>
i am using the large blue spring(.673 bar) and i have gotten it to 38 psi and still have alot of duty cycle to go


Modified by turbotypeR@SPEC at 7:11 AM 5/7/2008

boosted k20

the largest spring on the 60mm is only 1.048 bar? wtf

turbotypeR@SPEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted k20 &raquo;</TD></TR><TR><TD CLASS="quote">the largest spring on the 60mm is only 1.048 bar? wtf</TD></TR></TABLE>
why do you need any more than that. 1 bar blows the tires off in first gear anyway

wabaki

s372 S cover

wabaki

so a single 44mm wastegate is all i need for the s372 which is a fairly big turbo?

i have one lying around i might try it

HiProfile

You'd probably want the WG in the perfect place if you want to control low boost with a large turbo like you're thinking, but it might work out since it would probably creep in 1st gear. The consensus is that the fast ramp-up in power is usually what spins the tires, rather than raw power, in lower gears.

A 60mm would still allow for controlling 25-30psi with the 1bar spring, since you won't have a whole lot of exhaust pressure with a divided T4 setup (vs a divided T3 setup).

archull

with a twin scroll setup you have to run dual wastegates. Single scrolls will run 1 wastegate.

There is no purpose trying to run a single wastegate with a twin scroll manifold.

Do it right or don't do it at all.

ek9t72

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by archull &raquo;</TD></TR><TR><TD CLASS="quote">with a twin scroll setup you have to run dual wastegates. Single scrolls will run 1 wastegate.

There is no purpose trying to run a single wastegate with a twin scroll manifold.

Do it right or don't do it at all. </TD></TR></TABLE>so the yoparts integra is not done right

boosted k20

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by archull &raquo;</TD></TR><TR><TD CLASS="quote">with a twin scroll setup you have to run dual wastegates. Single scrolls will run 1 wastegate.

There is no purpose trying to run a single wastegate with a twin scroll manifold.

Do it right or don't do it at all. </TD></TR></TABLE>

u could run two tubes off each side of the manifold and join them into one for the 60mm gate. this is what im doing on a Neukin manifold.

for the 60mm gate, since the largest spring is about 1bar, u might run into issues with boosting 30+ psi???

I.C.C.

depends on your method of boost control. I have seen people running a 6 or 7 psi spring, but running 30+ psi boost and people running 11-13psi springs and 40+psi boost.. The Co2 works, but there are other methods and types of controllers that work just as well and dont need to be refilled

turbotypeR@SPEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by archull &raquo;</TD></TR><TR><TD CLASS="quote">with a twin scroll setup you have to run dual wastegates. Single scrolls will run 1 wastegate.

There is no purpose trying to run a single wastegate with a twin scroll manifold.

Do it right or don't do it at all. </TD></TR></TABLE>
wrong. one wastegate will woek fine if setup properly.

turbotypeR@SPEC

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boosted k20 &raquo;</TD></TR><TR><TD CLASS="quote">

u could run two tubes off each side of the manifold and join them into one for the 60mm gate. this is what im doing on a Neukin manifold.

for the 60mm gate, since the largest spring is about 1bar, u might run into issues with boosting 30+ psi???</TD></TR></TABLE>
i am using a 9 psi spring and i am not having any issues making as much boost as i want.

wabaki

Since the start of this thread i have seen a lot of succesful twin scroll single wastegate set ups. (turbotyper@spec being the best of them)

my point is i want to run a single wastegate because i still belive in the less parts less breakage idea. im sure the twin wastegate setup works wonders but not really necessary so for now i will try it and if dosent work well then all i have to do is get another 48mm