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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 12-01-2006, 09:57 AM   #21
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just don't buy from MJMTurbos.com I paid close to $450 for a new t3 S60. ended up with a t3/t4 with a ".60 trim" wheel...sigh (which was built poorly besides that, blades hit the walls). Took about 2-3 months and lots of talking with the better business buearu (Case #: 85003007) to get my money back. And by that point I had taken it apart; Keep the chra, turbine, and 360° bearing from it and sent them back my old parts....




what they gave me vs. T3 45 trim (large *** ****** ******* wheel)

(they machined out the housing and backplate to accept the wheel, the talked about laser/infared percision accuracy and all this bullshit. The compressor blades hit the walls on the first boost, the wastegate never worked, and it wasn't what I asked for. On top of that the guy who ran the shop refused to talk to me half of the time and hung up on my all the time when I was troubleshooting the compressor blades (I had no clue it was the wrong turbo at the time). He seriously was like "are you challenging the quality of my work?! and who are you?!" His shop was somewhere in AL (mjmturbo.com), but some random chick that took care of everything was based in CT (mjmturbos.com). Such a scam place.

So WOTs deal doesn't sound so bad at all.

acutally here's a quote:

Quote:
Scott,
I spoke to him and he clearly said that the turbo hits the wall.
When they assemble the turbo, they balance the wheels.
Then they will put the turbo in a strobe light and make sure does not hit the wall in hi-speed.
When you turn the housing, a slight **** eyed position or if the torque of the bolt is not even
the blade will hit the wall once it reaches 800 to 900 degrees. The turbo parts contract/expand.
There is very little tolerance in the wall.....not even .4 thousandt.

Tell you what, if I can ask him to repair it and you pay for the parts will you go along?
talk about ruining your turboing experience.
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Old 12-11-2006, 02:48 PM   #22
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http://www.blaastperformance.com/index.php?p=t34860

T3 0.48/0.60 $425.00

T3 0.48/0.60 Watercooled $445.00

Not a bad deal on a 60 trim, will work just as good as a super 60. Stinks they don't offer the smalle A/R combo
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Old 12-11-2006, 03:34 PM   #23
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Quote:
Originally Posted by braineack View Post
http://www.blaastperformance.com/index.php?p=t34860

T3 0.48/0.60 $425.00

T3 0.48/0.60 Watercooled $445.00

Not a bad deal on a 60 trim, will work just as good as a super 60. Stinks they don't offer the smalle A/R combo
Guillaume at Blaast can hook you up with whatever combo you want, including compressor covers, most Garrett A/Rs etc. Not sure why you'd really want a .48/.42 though. His rebuild prices are good but shipping to Canada can be pricey.

Frank
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Old 12-11-2006, 03:44 PM   #24
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still make big power and faster spool with the smaller A/R
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Old 12-12-2006, 07:37 AM   #25
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We have different ideas of "big power" I guess. Unless you're lugging around at 2k rpm all the time, quick spool is overrated.

Frank
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Old 12-12-2006, 09:35 AM   #26
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no it's not.
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Old 12-14-2006, 07:24 AM   #27
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It certainly is on the 7 turbo cars I've owned. I've gone with bigger turbos on every car I've owned. Having a "slower" spooling big turbo that stll makes 50whp+ across the board vs a small turbo that spins quick and dies over 6K just doesn't do it for me. But to each his own. You've got a 1.6 also (which I had) so your turbo choice and spool characteristics might be different than mine.

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Old 12-14-2006, 10:36 AM   #28
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I'd say displacement plays a big role in the majority of decisions on what one wants from forced induction. Just the displacement increase makes a big diff in daily low rpm driving- which is then compounded by even the slightest amount of boost. My boost onset is at 1800rpm with a t3 stage3 48AR, t4 50AR and it's immediately noticeable that boost is buidling from that point on. I now have a better understanding of how AndyFloyd drives daily with a 3271 (which is often referred to as a big turbo for a small 4 cylinder) - he's got 1.9L of displacement, a more efficiently designed turbo, a free flowing exhaust... all that and more make a big difference in how a turbo feels. Braineack's setup is probably at the other extreme - right?
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Old 12-14-2006, 10:53 AM   #29
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not really, T3 S60, starts to spool at 1.8k, reaches 12psi by 4k. But I've ridden in miatas that build boost faster, and I like the charateristics...it's really a compromise between ultimate power output and initial torque.
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Old 12-14-2006, 11:16 AM   #30
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I meant that you're not running a 3" exhaust, no cat, external wastegate, and have 300cc less displacement, therefore you run a smaller turbo.
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