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Twin Scroll Turbos?? Monster Spool.. FACT or FICTION???

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Old May 1, 2010, 08:47 PM
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Twin Scroll Turbos?? Monster Spool.. FACT or FICTION???

I realize we would need to really compare 2 kits on the same exact car and dyno at the same time but something that is told to be Definitively better shouldnt have to split hairs to shows its excellence IMO.. Sure a couple hundred RPM here or there how can we fuss but when a SINGLE scroll turbo setup spools IDENTICAL to a TWIN SCROLL setup said to be LEAPS AND BOUNDS better one must question things.. Thats what i am doing.. Questioning things.. I recently took some interest in these TS setups as we have been actively road racing much more.. I have spoken with Shearer about small runner T3 manifolds for single scroll and how we can make them spool like TS setups and still have the big top end power..

Which brings me to this evening.. I came across a dyno sheet for a TS setup from a car which i would say wasnt a BUDGET build probably so thought i would dig thru some sheets for comparisons.. Below is a TS 4088 Turbo 2.3L setup..

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Now here is a Single Scroll T3 6262 Setup on 2.3L motor..

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now these appear to be near identical up to 650hp which is where we stopped with this car either due to lack of fuel or just didnt want to push the car.. As we already know the 6262 can make 750+hp..

Now doesnt this simple single scroll , 1 wastegate setup appear to have the same power band??? Not to mention is revving 8000+ and not dropping much power where as the other setup is dropping power at 7500.. We also know for a fact the single scroll HTA 82 spools even faster than 6262 so can you imagine that turbo on this setup..

Id like to see some more dyno sheets that support the TS ultra spool theory.. I know TedB has some of them I am sure.. Ill also see if i have any more 2.3L dyno sheets so we can compare further..

Mike
Old May 1, 2010, 08:49 PM
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how can you compare 2 cars, 2 totally different set ups, and a 6262 vs 4088????
Old May 1, 2010, 08:51 PM
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technically the t/s is spooling a lot faster. just compare the wheel sizes of the 6262 to the 40R. how about a spool difference between a single scroll 40R?
Old May 1, 2010, 08:53 PM
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Originally Posted by n2oiroc
technically the t/s is spooling a lot faster. just compare the wheel sizes of the 6262 to the 40R. how about a spool difference between a single scroll 40R?
Actually technically i find they make the same PEAK HP as i have seen near 800wheel HP with 6262 so you cant go by wheel size as 1 is billet and the other cast.. just comparing turbos with EQUAL PEAK HP ability.. I wouldnt install a 40r on a car with whats available today so I am not sure..

Mike

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Old May 1, 2010, 08:56 PM
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Originally Posted by evodan2004
how can you compare 2 cars, 2 totally different set ups, and a 6262 vs 4088????
I said all that in my opening statement..

lets just say this could be a comparison against what is SUPPOSED to be an IDEAL TS setup vs. what i found as just an AVG single scroll setup and they are identical..
Old May 1, 2010, 08:58 PM
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Originally Posted by Mike@AwdMotorsports
Actually technically i find they make the same PEAK HP as i have seen near 800wheel HP with 6262 so you cant go by wheel size as 1 is billet and the other cast.. just comparing turbos with EQUAL PEAK HP ability..

Mike
actually i chose a 40r over a hta86 or 6262 for durability reasons, im not looking to make more power than what a hta86 will. the small frame turbo's do not hold up well to lots of boost.
Old May 1, 2010, 08:58 PM
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I'd like to see a comparison of a single scroll 3076 VS a ts 3076 or even some 3582s.. Something a normal evo guy would have nothing huge but streetable and still makes good power.
Old May 1, 2010, 09:01 PM
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Originally Posted by n2oiroc
actually i chose a 40r over a hta86 or 6262 for durability reasons, im not looking to make more power than what a hta86 will. the small frame turbo's do not hold up well to lots of boost.
Thats news to me.. We ran our 6262 for several months @ 49psi on the street and track.. Even if you prefer the true Garrett cartridge which means HTA over PTE id go that route before 40r myself.. That turbo i consider a dinosaur with its Cast Blade aeros.. Good luck either way tho..

Mike
Old May 1, 2010, 09:01 PM
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Originally Posted by Wickedwhite8
I'd like to see a comparison of a single scroll 3076 VS a ts 3076 or even some 3582s.. Something a normal evo guy would have nothing huge but streetable and still makes good power.
I wish i had a SS 3582 chart on 2.3L .. That would be a sick setup..
Old May 1, 2010, 09:02 PM
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Mike, I feel the same way. 1.5" runners are not needed for the Evo. Full Race kits are only availible in 1.25" and they can make great power. I don't agree with some of the companies saying that you need 1.5" runners if you are going to be making over 500-600hp. Hell, the stock manifold has seen 600-700hp quite a few times and has not had a problem.

Honestly, the best thing for spool would be to just do a 1.25" runner manifold with a T3 1.06 HTA3586. That would make 700hp and have amazing spool.

Mikey
Old May 1, 2010, 09:03 PM
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Originally Posted by Mike@AwdMotorsports
Thats news to me.. We ran our 6262 for several months @ 49psi on the street and track.. Even if you prefer the true Garrett cartridge which means HTA over PTE id go that route before 40r myself.. That turbo i consider a dinosaur with its Cast Blade aeros.. Good luck either way tho..

Mike
im glad yours held up to 49 psi. i couldnt keep a precision alive past 22 psi on my sti.

Old May 1, 2010, 09:04 PM
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Originally Posted by n2oiroc
im glad yours held up to 49 psi. i couldnt keep a precision alive past 22 psi on my sti.

Interesting.. only difference between yours and mine is the Car.. i have these on a 200 cars and i would ask even 1 customer of mine to post up that their PTE turbo died.. Im not saying it doesnt happen but i dont think i have even 1 customer on here that i have sent a turbo back for.. I know for a fact i havent had 1 customer we have installed the turbo for properly that ever had to send it for service..

Mike
Old May 1, 2010, 09:05 PM
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my 30r TS setup his 27psi at 3750 rpm.


mike. post up a 4088R setup on the same ''around about'' boost.

as for HTA 86 failing. or a 6262. um. it happens. every turbo will fail. phil IMO if your looking for 86HP. run the 86. it works well in TS. i see your point but your not pushing the 4088r or a 86 hard enough to hurt anything.
Old May 1, 2010, 09:05 PM
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Originally Posted by Mike@AwdMotorsports
I wish i had a SS 3582 chart on 2.3L .. That would be a sick setup..
Mike I'll have one soon

Mikey
Old May 1, 2010, 09:06 PM
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Originally Posted by n2oiroc
im glad yours held up to 49 psi. i couldnt keep a precision alive past 22 psi on my sti.

First off to my understanding, the STIs have more oiling problems than an EVO. You can't compare apples to oranges!

Mikey


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