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Precision SC61

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MXD

15+ Year Contributor
81
0
Dec 12, 2004
Queens Village, New York
Hey guys i was wondering what kind of exhaust manifolds you guys running this turbo are using? Will a Ported 2nd Gen work without special flanges?? Thanks everyone - And does anyone have a guide/link to anywhere that can better explain the purpose and meaning of .63 A/R - Turbine housings, etc... I like know things before i dive into them :)

P.S. - Is the SC61 available externally gated? Thanks
 
I have the SCM-61 bolt on to myy 2g manifold. No special tools required no special parts except the oil supply and drain lines. You must feed the turbo from the oil cooler directly. There's a kit available for it cost about $75. You drain tube will have to be cut and spliced with a hose, its all in the kit.

Word of advice here...If you have the stock 2g motor you WILL GET CRANK WALK WITH THIS TURBO. you get tons of topend. Oh you asked about the A/R get the A/R in the 50's the larger the number the more lag you will have and harder to spool up. This turbo will not spool until you hit 4000 rpm's so be ready to build you a 1st gen with pistons Rod Etc..

Good luck it a sweet turbo people will respect :thumb:
 
you will have to do a little bashing of the water pipe to bolt up the turbo...don't go crazy hitting the pipe just tap and fit until she go in... you can order the turbo externally gated its cheaper too... I perfer internal....it still screams. :thumb:
 
I already have a 1st Gen Engine. I already have a heavily built bottom end and head waiting to go into the car. Im trying to select a turbo and the 2nd Gen manifold seems to be a popular choice on 1st gens. Is there a manifold that doesn't require modding the coolant tube?
 
Yes there are plenty of turbos out there but listen...if you have a built botton and head molding the water pipe will not harm the motor at all ask those 10sec guys if the mold theirs's
 
Mitsuboyee said:
Word of advice here...If you have the stock 2g motor you WILL GET CRANK WALK WITH THIS TURBO. you get tons of topend. Oh you asked about the A/R get the A/R in the 50's the larger the number the more lag you will have and harder to spool up. This turbo will not spool until you hit 4000 rpm's so be ready to build you a 1st gen with pistons Rod Etc..

Good luck it a sweet turbo people will respect :thumb:
Click to expand...

Crank walk from a SCM - 61 .... Not a chance. You either have it or you don't. There is no way a turbo is going to cause it.

You get the turbo with a .63 AR turbine housing and if it is a SC-61 it has a T3 turbine inlet not a Mitsu inlet like the SCM-61....M for Mitsu.

A/R ratio explained here.
 
You'll need a slim line fan for sure on the driver's side...it would be better to get slim lines for both sides. You could also eliminate the driver's side fan (I did but it is not daily driven) and cut the fan shroud all to heck on the passenger side. As for the water pipe, just machine the bolt hole to make it oval. THis way you can slide it up a little when reinstalling. Lastly, I have the SCM 61 with the .63 AR and it does lag pretty badly...but once it comes on, you'll see the wait is well worth it. I am trying to decide what cams to get as I'm still on the stockers now. Anyhow, good luck.
 
does anyone know if this thing pulls harder then the gt35r.....or are they pretty much considered the same turbo...besides the bb part.....i don't wanna hear anyone say that gt35r is better because of bb......is sheps turbo bb.....nope...so if anyone knows lemme know...and how does this thing compare to a 20g td05..latz Garrett... :dsm:
 
Does anyone know the approximate size of the SCM-61?
 
dsmrunaway1 said:
does anyone know if this thing pulls harder then the gt35r.....or are they pretty much considered the same turbo...besides the bb part.....i don't wanna hear anyone say that gt35r is better because of bb......is sheps turbo bb.....nope...so if anyone knows lemme know...and how does this thing compare to a 20g td05..latz Garrett... :dsm:
Click to expand...

GT35R has a larger/better turbine wheel than the SCM-61. SC-61 = T3 turbine housing, while SCM61 = bolt on turbine housing.

20G can't hold a candle to this turbo in terms of overall power making ability.
 
i would have swore that the scm61 has the gt35r comp wheel inside of it...but is attached to the stage 5 wheel....i didn;t think it had a better wheel... :dsm:
 
I have this turbo and with a 2g manifold it was hitting the water pipe. Even ported 2g manis won't have a 7cm opening anyways ( well either that or the runners won't be as large ) so don't waste your timing with that. I went ahead and bought a sbr ported cast manifold and couldn't be happier. I SWEAR it improved spool over my ported 2g manifold and it also has a thicker flange that spaced the turbo out far enough from the block / head that the water pipe literally just needed a tap and that was only because of the way my compressor side was rotated as well. ( there's little tabs that stick up on the housing and the tab was barely touching ) As far as radiator fans ... I can't speak for a 1g owner, but I have a 2g and I just removed the drivers side fan since it was the AC fan anyways and I didn't need that since I have no AC anymore. As far as a 1g goes, I thought that those had a lot more clearance anyways between the turbo and fans?
 
dsmrunaway1 said:
i would have swore that the scm61 has the gt35r comp wheel inside of it...but is attached to the stage 5 wheel....i didn;t think it had a better wheel... :dsm:
Click to expand...

61mm GT40 compressor wheel.
 
Precision only offers the .63 A/R with the SCM61. I believe you need that big of a turbine housing to flow the amount of power the turbo makes :thumb:
 
WOW! Many of you havnt a clue what your talking about. Yet you contiue to push the bad information you have as end all. Simply astonishing.

The SC61 uses the same compressor wheel found in the GT35R. The turbine wheel in the 61 is a T350(76trim) 71mm major wheel. The turbine wheel found in the GT35R is just that... GT35 84trim 68mm major wheel. Looking at the 2, you can barely tell them apart.(and put those 2 next to the GT30 84trim and gt37 turbine.... Now tell me which is which!)

Next. A turbo has never, will never and could never cause crankwalk.(thank you to the members that have already pointed this out) Crankwalk is caused by a whole grip of things that have been speculated and debated on over the years. One cause that is deffinate, is poor workmanship during a rebuild.


Those of you spilling the bad seed, knock it off. You know who you are. Im getting sick of reading and correcting you. it's very simple, and in the rules as well. If you DONT KNOW , dont post! Simple.
 
GSX4LIFE said:
WOW! Many of you havnt a clue what your talking about. Yet you contiue to push the bad information you have as end all. Simply astonishing.

The SC61 uses the same compressor wheel found in the GT35R. .
Click to expand...

A GT40 61mm wheel.
 
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