Scm61 Vs T-66

[91 white tsi]

for all users of these turbos, i am looking into a 600 whp(700+ crank) turbo and wanting to know how they compare and drive. when you start building boost, when you hit boost. and if anyone has a dyno sheet from either so i can see the power curves. i was told if i wanna have an easier time seeing 600whp to got with a T-4 instead of the SCM60-1. Once again im building and engine and gathering parts for this so they arent in my profile. I might put whatever turbo i get on my stock engine till i get the other one built since i dont know how longmy 14b is going to last. will that be a problem?

 

[CanadianTalon]

Are you talking about a PTE 60-1, or are you talking about an SC61, because they are 2 different turbos and the SC61 will support more HP.

 

[91 white tsi]

i was told if i wanna have an easier time seeing 600whp to got with a T-4 instead of the SCM60-1.

The SC61. how much lagger is it than the scm60-1 and how much lagger would a T-66 be. hows the wheel on the sc61 as in high air flow at low rpms like the scm60-1?? I would like any dyno charts on turbos bigger than the SCM60-1 so i can have a rough idea of when power hits. also how many people are reving past 8K? i was thinking i would build one to rev to 10 but not rev that high. is that needed?

 

[4SFED4]

If you plan to run a full T4 frame turbo; you are looking at building full boost around 6000 and need atleast a 9500RPM redline to stay in a useful power range on a 2.0.

Trying to put a T-66 on a stock engine would be pointless. Trying to operate at low engine speeds you would encounter compressor surge, especially with no supporting mods. A bolt on hybrid would be your best solution, unless you have $10-15K to buy and provide all the supporting mods to run a large frame turbo. Also relize 700hp isn't feasable for a daily driver, to make that kind of power requries race fuel, not 93 unleaded with xylene and/or fuel additives.

 

[4gsx63]

i was told if i wanna have an easier time seeing 600whp to got with a T-4 instead of the SCM60-1.

The SC61. how much lagger is it than the scm60-1 and how much lagger would a T-66 be. hows the wheel on the sc61 as in high air flow at low rpms like the scm60-1?? I would like any dyno charts on turbos bigger than the SCM60-1 so i can have a rough idea of when power hits. also how many people are reving past 8K? i was thinking i would build one to rev to 10 but not rev that high. is that needed?

Ever looking into this? This is FP3052 with 50 shot; 595whp, 507 torque.

http://linux.forcedperformance.net/merchant2/graphics/00000001/full/50shot_full.jpg

You can also go with FP3065 which can make 600whp and more with nitrous.

 

[LaserRST]

The compressor map is awesome for the T66. It is has a much larger efficiency island than the larger T-seiries turbos probably the best of em all. But for a 2 liter engine you will need to rev hard and turn up the boost alot to make 650 hp. For instance at 7k your barely getting past the surge line with 72% efficiency @ 18 psi and thats only around 350hp. And to reach your goal you would need to rev up to 8600 rpm at 50psi!! :laugh: The turbo is wicked enough to handle those boost pressures and still be at 74% and flows enough for over 700 hp, but for your engine your gonna need to open her up quite a bit. She will need to breathe over 900 cfm and a hard redline. Maybe 2mm os valves,a stage 4 port job,Ti lifters, dual springs, increase the lift and durations of the cams (max im thinkin 272 or 28* if you can find em or regrind), a high flow intake and piping to match, maft, intercooler, and some wicked ignition sys to handle the high boost!!

Heres the link for the comp map of the T-66 http://www.turbonetics.com/catalog/compmaps/fig4.html

Also find a place to store her and somethin to tote her around the track with....

 

[CanadianTalon]

If my T66 car made 350 HP at 18 psi I would shoot myself. Bus' car made 650 WHP at 34 pounds of boost from a T3/T66. He's running a 2.3, but it still has a broad powerband peaking at 8000 RPM's. Here is a .58 A/R T67 on a 2.0L motor Lots of boost in there by 5500 RPM's, he would still make power to 8500, probably 9000 but he doesn't need to turn 9500. The T66 really isn't that great of a wheel, it's peak efficiency is quite narrow and tall, and it needs a lot of boost to get going. The PT67 is MUCH more efficient at lower boost levels, and more efficient all across the board. Plus it's new technology for faster spool.

 

[GSX4LIFE]

I agree. The T66 is all but obsolete at this point. There are several wheels which flow a little less or a little more with much better efficiency. GT40 56trim, SP63, and GT67 all flow within 10 lbs of a T66. If you want to try one kick ass setup on a 2.3 or 2.4, or maybe a 2.0 with nitrous. Look into a GT3767(this is what I call it) Now try to figure this one out.

 

[CanadianTalon]

What I am going to be trying is a GT4067 - GT40 turbine wheel and a T67 compressor wheel, it's a T4 framed turbo. On a 1.8 with a big .81 A/R housing we had 20 pounds of boost in by 6000, so I'm guessing with a 2.0 and a .68 housing we hope for 20 pounds at around 5000 RPM's.

 

[LaserRST]

If my T66 car made 350 HP at 18 psi I would shoot myself. Bus' car made 650 WHP at 34 pounds of boost from a T3/T66. He's running a 2.3, but it still has a broad powerband peaking at 8000 RPM's. Here is a .58 A/R T67 on a 2.0L motor Lots of boost in there by 5500 RPM's, he would still make power to 8500, probably 9000 but he doesn't need to turn 9500. The T66 really isn't that great of a wheel, it's peak efficiency is quite narrow and tall, and it needs a lot of boost to get going. The PT67 is MUCH more efficient at lower boost levels, and more efficient all across the board. Plus it's new technology for faster spool.

Thats a nice curve on that dyno. Note how the torque curve drops at around 6300. Dam hybrids. I bet a stage 3 wheel clipped would adjust that torque and boost his hp, or a bigger a/r on the turbine. Wont leave much room to shift but just a thought. I like how it jumps from 200hp to 500 hp between 5k and 6k... wonder what the g-forces are like.

 

[CanadianTalon]

Thats a nice curve on that dyno. Note how the torque curve drops at around 6300. Dam hybrids. I bet a stage 3 wheel clipped would adjust that torque and boost his hp, or a bigger a/r on the turbine. Wont leave much room to shift but just a thought. I like how it jumps from 200hp to 500 hp between 5k and 6k... wonder what the g-forces are like.

Who are you talking about? Both Bus' car and the PT67 car posted are using TO4 P-trim exhaust wheels, significantly bigger than a Stage 3 wheel.

 

[GSX4LIFE]

Yeah. Thats what I was thinking. Stage 3 wheel? Dude? Do you even know what a stage 3 wheel is? Do you know the specs on it? No one in thier right mind would ever match a stg. 3 turbine to a T67. Read and learn a bit more before posting guy.

 

[LaserRST]

Explain T3/T66?

 

[CanadianTalon]

Explain T3/T66?

T3 exhaust housing mated to a T66 compressor side. Bus' car is probably a .82 A/R T3 housing cut out for a P-trim wheel. Nets you better spool in a smaller/more readily available package than a full T4 turbo.

 

[LaserRST]

Ah... so the same with urs? .58 A/R is fairly small so I was thinking this was the turbine side in a hybrid. I know the smallest compressor housings on the pt67 is 3in inlet with 2in outlet the others have a 4in inlet and a 2.5 in outlet (to4s housings) both of which would pbbly be at least .66 a/r. This is why I thought you were running a T3 turbine wheel. I have the same thing sittin at the house, To4b with a 63 a/r T3 turbine hogged out to fit an O trim wheel, didnt know how successful that set up was. Its interesting how torque takes a nose dive while you still see some good horsepower gains and remains steady up to your redline. How does the .83 a/r housing compare?

 

[swordfish]

Explain T3/T66?

Here are a few pics from the build up. Canadian Talon is right. We are using a T3 .82AR turbine housing with a P trim turbine wheel on the hotside.

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Turbine housing

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And here is the dyno sheet for 34psi.

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jeff

 

[mbird]

whos car in the pics? and i think i read this right but the turbo in the pic is a t66 with t3 .82 a/r correct?