2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

porting blower and tb

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Old Aug 17, 2010 | 11:34 AM
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From: Land of Freedom
porting blower and tb

Looking to have blower and throttle body ported and then pulley down to possibly a 2.5 since the pulley would be my restriction at that point. Building head over winter. Looking for info / comments from people who have done this and what were your results? Thanks
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Old Aug 17, 2010 | 11:52 AM
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Save money and get a TVS if you want higher boost, if you don't wanna deal with the turbo.

TVS+3.15pulley=20psi at a higher CFM than the M62 ever thought about.
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Old Aug 17, 2010 | 12:47 PM
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I wouldn't pulley down to that small of size, I'd say 2.7 the smallest
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Old Aug 17, 2010 | 01:44 PM
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From: Land of Freedom
I'm currently running a 2.7
Also if we port blower it should run less boost shouldn't it since boost is a measurement of restriction?
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Old Aug 17, 2010 | 01:47 PM
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itll run cooler as well..
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Old Aug 17, 2010 | 01:51 PM
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yeah if your port the blower, the boost levels will be lower, cuz of less restriction being forced through.

Don't forget just because your boost isn't as high don't mean your making more power
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Old Aug 17, 2010 | 01:52 PM
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From: NEPA
Originally Posted by ecotecon18s
Save money and get a TVS if you want higher boost, if you don't wanna deal with the turbo.

TVS+3.15pulley=20psi at a higher CFM than the M62 ever thought about.
You shouldnt be shooting for high boost numbers .... Boost is a measure of restriction (not power)

The higher CFM capability of the TVS is the selling point in your post. That's the key to power.
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Old Aug 17, 2010 | 01:54 PM
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From: Land of Freedom
Originally Posted by MP Cobalt
yeah if your port the blower, the boost levels will be lower, cuz of less restriction being forced through.

Don't forget just because your boost isn't as high don't mean your making more power
That's why I was thinking of pulleying down and retuning
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Old Aug 17, 2010 | 02:28 PM
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From: MP, PA (S of Pittsburgh)
Originally Posted by 07MetallicSC
That's why I was thinking of pulleying down and retuning
I would, also with porting should help temps also
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Old Aug 17, 2010 | 05:36 PM
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From: Land of Freedom
Nice. Spinning faster with smaller pulley wont generate more heat?
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Old Aug 17, 2010 | 07:35 PM
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just remove the blower altogether, that way you don't have to worry about any of that pesky hot air getting into the engine
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Old Aug 17, 2010 | 08:08 PM
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omg look another get rid of the supercharger comment in a supercharger thread. god you people are so helpful.
we did a swirl polish on the housing of mine and it helped us with temps. (not a ton but it helped)
also we slammed an ls4 throttle body on it and then ported and polished it out with it. lost a couple degrees of off of that as well. not to mention the 10 plus horses we got off of it...
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Old Aug 17, 2010 | 08:17 PM
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Originally Posted by SS Pyro IV
omg look another get rid of the supercharger comment in a supercharger thread. god you people are so helpful.
i wasn't going to suggest it be replaced with anything, he just needs to remove it
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Old Aug 17, 2010 | 08:25 PM
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and wtf is a "swirl polish"? lol
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Old Aug 17, 2010 | 08:30 PM
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Im getting my M62 and TB ported this weekend........but im staying with 2.7 and meth for now....im going to use meth as Octane not as cooling anymore since my m62 is going to be ported and my S3 HE should be here in the next couple of days.....& Retune.........see what it does....lol
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Old Aug 17, 2010 | 09:02 PM
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From: Land of Freedom
Originally Posted by SS Pyro IV
omg look another get rid of the supercharger comment in a supercharger thread. god you people are so helpful.
we did a swirl polish on the housing of mine and it helped us with temps. (not a ton but it helped)
also we slammed an ls4 throttle body on it and then ported and polished it out with it. lost a couple degrees of off of that as well. not to mention the 10 plus horses we got off of it...
Ten horses and lower temps is perfect on what I was looking for. Would you happen to have a synopsis graph as well?
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Old Aug 17, 2010 | 09:05 PM
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anyone who says there is no gains with a 2.5 is misinformed, the gain is torque
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Old Aug 17, 2010 | 09:10 PM
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From: Land of Freedom
Only thing ill prob have a problem with is belt slip. Have to get tensioner
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Old Aug 18, 2010 | 06:51 AM
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From: ky
Originally Posted by 07MetallicSC
Only thing ill prob have a problem with is belt slip. Have to get tensioner
i may have an oversized tensioner somewhere in a box, you can have it if i can find it... but it may take a while, we're in the middle of moving everything into a new shop
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Old Aug 18, 2010 | 07:13 AM
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From: NEPA
Originally Posted by Frew
anyone who says there is no gains with a 2.5 is misinformed, the gain is torque
Correct, but the damage done to the blower from a 2.5 isnt really worth it. If you don't care how long the blower is going to last go right ahead, and throw a 2.5 pulley on there. If you want a reliable setup that makes good power shoot for a slightly larger pulley, & get a good E85 tune.
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Old Aug 18, 2010 | 07:20 AM
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some areas like mine dont have e 85 readily available, so 2.5 it is lol
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Old Aug 18, 2010 | 07:45 AM
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From: NEPA
Originally Posted by Frew
some areas like mine dont have e 85 readily available, so 2.5 it is lol
haha, yeah I cant argue with that then.
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Old Aug 18, 2010 | 09:43 AM
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Thanks self let me know how you make out. And only four e85 stations in CT. All for private state use
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Old Aug 18, 2010 | 10:15 AM
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Originally Posted by Staged07SS
Correct, but the damage done to the blower from a 2.5 isnt really worth it. If you don't care how long the blower is going to last go right ahead, and throw a 2.5 pulley on there. If you want a reliable setup that makes good power shoot for a slightly larger pulley, & get a good E85 tune.

as long as you take a few tiny steps for preventive maintenance, (have the rotors coated) aside from that the only thing that a 2.5 would adversly affect is the coupler, which can be replaced with a ceramic one and your good to go.

Originally Posted by selfinfliction
and wtf is a "swirl polish"? lol
i know you werent saying replace it with anything, i was just giving you **** lol
as far as a swirl polish goes, instead of leaving the housing glass smooth, we did it in a helix design to help "swirl" the air and help it move faster.... sounds weird but it works....

Last edited by SS Pyro IV; Aug 18, 2010 at 10:15 AM. Reason: Automerged Doublepost
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Old Aug 18, 2010 | 10:32 AM
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Originally Posted by SS Pyro IV
as long as you take a few tiny steps for preventive maintenance, (have the rotors coated) aside from that the only thing that a 2.5 would adversly affect is the coupler, which can be replaced with a ceramic one and your good to go.
Wrong. 2.5 will eat the bearings.
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