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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 01-02-2009, 01:20 PM   #61
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Get a T3/4 .60AR comp and .48 exh. There cheap and if you blow up your motor and take out the turbo it won't be a big dollar turbo . I ran the same turbo in my stock 1999 Integra type-R for 3 years and never had issues with it. Never had a chance to print screen at the dyno shop (Church's) but it made 341 HP and 266 TQ @ 15psi pump gas 91 oct. on a dynapack dyno. The boost was always quick above 4500RPM.
The only problem i had was law enforcement . It seemed like i was getting pulled over every month and had to REF the car every quarter . So take out the turbo, REF the car and put the turbo back on. What a pain in the ***.
Then it happened one night racing a Lambo, He called me out on I 5 north, i up'ed the boost from 14psi to high setting 18-19 PSI. Here we go. Damn it pulled HARD from 70mph to 95 then into 5th gear pulling away from the Lambo maybe half a car length, and i starting hearing it, detonation (metal/aluminum crunching) and before i could let off, white smoke accross the whole freeway. Long story short High Comp motor and boost very unforgiving. Didnt notice any throttle response difference, just way more TQ. Oh yeah the damage, broke all the ring lands on every piston, and scored #3 cylinder. cost of repair $1200 and 3 weeks of down time .
It can be done, but expect to PAY alot and break a few times to make it work. Since it is somewhat experimential (trial/error). GL in your plans and future endeavors.
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Old 01-02-2009, 02:08 PM   #62
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You know, I would get some answers from folks who do this. All aluminum motors (the head is most important) cool a lot better, let you run more compression... I would check at what they are doing on turbo motorcycles.

One thing I have noticed - the higher the compression, the higher the cost. :-)

No one has said it can't be done. But it's going to be a tuning nightmare, probably go through a couple motors on the way to get **** sorted. None of this throw the turbo on, then "Let's go around the block and see how it feels before figuring out all this wiring" etc. No starting it, and getting on it while cold. It will be a RACE CAR. The sort of thing you warm up with a special procedure, you expect to rebuild often. Etc.

There's plenty of fast, powerful miatas that smoke tires all day long. Most of us here own them. Again, it's a question of phrasing your question right. Do you want 12.0000 psi of boost on an 11:1 motor, or do you want 230 tq from 3,000 to 5,000 rpm as reliably as possible given _____ as a starting point?
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Old 01-02-2009, 02:38 PM   #63
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Quote:
Originally Posted by AbeFM View Post
or do you want 230 tq from 3,000 to 5,000 rpm as reliably as possible given _____ as a starting point?
yes, except the blank is 'an 11:1 motor'

I see what you're saying about aluminum motors, because the greddy turbo kit for s2000's gives them 10psi on a pretty small turbo, and they handle it. They describe the tuning as 'not a cakewalk' but they don't say its impossible by any means.

And I understand it will be pretty much a racecar. I could either make it a full-time track car and run 110 octane leaded gas, or use water/meth injection during any boost. The latter would still make it streetable, but still not very practical. I think its kind of silly for people to say that that's just adding in another point of failure and if it stops your engine will explode. Obviously I'll hook it up so that if i run out of water or if the nozzle gets clogged, or theres a pressure drop, it will peg the wastegate open.

Thank you everyone for your supportive answers.
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Old 01-02-2009, 02:41 PM   #64
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Posting nudes of your significant other will facilitate more help btw.
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Old 01-02-2009, 02:47 PM   #65
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johndoe, that's obscene, immoral, and appalling. And oh I happen to have some of that. So I present to you a webcam screenshot of some chick I know.
ImageBam - Fast, Free Image Hosting and Photo Sharing (NWS)
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Old 01-02-2009, 02:56 PM   #66
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mmm *******.
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Old 01-02-2009, 02:58 PM   #67
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I consider any issues anyone had with this thread to be resolved at this point. thank you.
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Old 01-02-2009, 03:10 PM   #68
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Oh ****! That's my mom!

My friend is driving, as we speak, a 2000 with OEM internals, a MSM turbo, and a MS we built to nashville. Except, he took everything off since he got ref'd, now he's running the stock computer. Still has HID's though. JDM!!!
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Old 01-02-2009, 07:55 PM   #69
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the post so nice i made it twice

Last edited by Savington; 01-03-2009 at 02:48 AM.
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Old 01-02-2009, 07:58 PM   #70
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Quote:
Originally Posted by N3v View Post
Savington, you usually know your **** and I respect you, and I think you're right with everything else you said, but as far as this stuff ^^, that sounds like an awful lot of speculation.
yeah, brah, boyle's law and EGT measurements are total speculative BS.

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There are also upsides from running high CR.
Yeah, one. More off-boost torque, by about 8%. If you are able to increase cylinder compression and maintain peak pressures as pats says, you can gain efficiency and off-boost torque. That's why my forged motor will have 9.5:1 pistons. You, on the other hand, with 11:1 pistons, are going to struggle with a buffet platter of high EGTs, idiotic octane requirements, and boost restrictions. You're either going to break pistons or melt them; either way I'm sure you'll have loads of fun.
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