any 1.6 with gt3071 here ? - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 11-25-2009, 02:44 AM   #61
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actualy platinum you dont need to change the pinion it just scales better if you do. Over all i hope i am not the only one who is excited to see your numbers. Dont let these gramar and spelling ***** disuade your progress. Most of them are newbs in disquise.

Also blue ***** is when you are on the verge of cumming and you dont repeatedly this will cause a pressure buildup and pain in your testicels. It is a sexual inuendo implying that you are teasing them with seductive things.
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Old 11-25-2009, 02:50 AM   #62
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Like I said Tease!



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Originally Posted by magnamx-5 View Post
actualy platinum you dont need to change the pinion it just scales better if you do. Over all i hope i am not the only one who is excited to see your numbers. Dont let these gramar and spelling ***** disuade your progress. Most of them are newbs in disquise.

Also blue ***** is when you are on the verge of cumming and you dont repeatedly this will cause a pressure buildup and pain in your testicels. It is a sexual inuendo implying that you are teasing them with seductive things.
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Old 11-25-2009, 08:21 AM   #63
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Quote:
Originally Posted by magnamx-5 View Post
Also blue ***** is when you are on the verge of cumming and you dont repeatedly this will cause a pressure buildup and pain in your testicels. It is a sexual inuendo implying that you are teasing them with seductive things.
Lol, I just realized why he asked what I meant, he's from Greece.
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Old 11-25-2009, 08:24 AM   #64
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Quote:
Originally Posted by magnamx-5 View Post

Also blue ***** is when you are on the verge of cumming and you dont repeatedly this will cause a pressure buildup and pain in your testicels. It is a sexual inuendo implying that you are teasing them with seductive things.
Damned! I know the pain. Actually it feels like a punch at the *****. Great explanation.
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Old 11-25-2009, 08:49 AM   #65
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Lol, I just realized why he asked what I meant, he's from Greece.
i know what is means i just don't understand your sense of humor.
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Old 11-25-2009, 09:19 AM   #66
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How can you? You live in a cave, eating roots and raping children.
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Old 11-25-2009, 09:58 AM   #67
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Platinum, we are all very interested in your build. We always joke with each other like that on this forum.

You should add Greece to your details so it shows under your name like gianic does. It will help stop misunderstandings.

I really like the big turbos. But it looks like you will need a heat shield between the turbo/downpipe and the brake system. The brake reservoir plastic melts easily on our cars.

We are all happy to have you here and are very interested in your dyno results.
Good luck.
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Old 11-25-2009, 10:15 AM   #68
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Wow...that turbo is HUGE!

I have mad respect for your build...and really want to see numbers.

I have a feeling I'm going to pull the trigger on some rods soon...and see just what a 1.6L can really do. I caught a deal on a Tbird compressor upgrade over the weekend...and got my water injection working yesterday.

Besides our slew of drivetrain problems I don't see why everyone fears big turbos. Having started with a turbo 2 sizes too small I'll never make the same mistake again.
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Old 11-25-2009, 04:12 PM   #69
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I don't think its as much people "fearing" them as most just wanting something small and responsive to give the miata a bit of a kick down low and in the midrange to make it a fun daily driver. Everyone knows a car driven daily is much more fun with quick response and a very nice curve compared to one that takes til 5k to really "hit" and then hits so violently you're counter steering for the next 2 minutes


That said, I would like to also add: I LOVE BIG TURBO'S
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Old 11-25-2009, 04:24 PM   #70
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Idk, a lot of the miata community fears bit turbos, or lag in general. Its juts a bunch of old school thinking.
*cough* M.net *cough cough*

I dont really see that on here as much.
You gotta remeber that these engines dont flow or rev as high as hondas, its common to see 30R's on built 1.8L hondas and 35R's on really serious builds, but our engines dont seem to respond to that big of a turbo quite as well.
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Old 11-25-2009, 04:26 PM   #71
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That too. I forgot to mention that.
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Old 11-25-2009, 04:37 PM   #72
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For instance

Mazda B6 with GT3076R at 13psi



Honda B16 with GT3076R at 10psi and 18 psi
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Old 11-25-2009, 05:57 PM   #73
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That B6 needs a camshaft that is optimized for the 5000-7000 rpm range. Stock cams are designed for midrange torque, and not where big turbos make their power. Every component should be optimized for operation in the same rpm range if you are trying to get the most out of it. We are limited by some (head design), but others we can change (cams, intake, exhaust system).
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Old 11-25-2009, 09:30 PM   #74
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this dyno is just terrible. First of all a gt3076 at 13 psi is just sleeping.
If you check the maps from garrett you will see that the best perfomance is from 25 psi and up.

I told again that gt3076 is much different than a gt3071.Gt3076 is a smaller Gt35. Is ok only if you have a stroker kit, but you need big pressure to push this huge thing. 30psi and up you will have the best perfomance.

Gt3071 is very similar with gt2871 but with new design and much better spool.


Honda are very strong and nice but i have too many others engines to compare very similar to bp engines.For example Toyota 4a-ge is a very popular 1.6 16v engine that can easily push a gt3071.
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Old 11-25-2009, 11:52 PM   #75
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Your seriously teasing us, I've never seen turbo that large on a 4AGE, and I've seen corollas with both 7M, and 2J swaps. Do you know of any other miata's running your setup with number to back up the claim. I'm not saying your wrong, but before I start putting a ton of stuff on ebay to get a different turbo, I'd like to see some results.
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Old 11-26-2009, 12:06 AM   #76
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yah Im seeing pretty high efficiency around the 10 psi range, so saying the car was not efficient at 13 psi doesnt make a whole lot of sense. What I do see is low efficiency at low flow rates (like those generated by our little engines, lol).
Hence the lag, and lack of power.

So Im just going to draw this conclusion:
Unless youre doing a reeeally serious build,
gt3076 = way too big
gt3071 = pretty big, learn to brake boost
gt2871 = probably the best balance of power to driveability imho
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Old 11-26-2009, 12:45 AM   #77
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Quote:
Originally Posted by Braineack View Post
well here's a GT3071 on a stroked 2.0L miata:






the red one here is another 2.0L Stroked miata:
Interesting that 2.0L on that graph is mine.

Dyno was done with FM's optimistic altitude correction. But it was at altitude.

I went back to a dyno after I got home here at sea level with the same exact tune.
It was a Dyno Dynamics Dyno. Peak power was measured at 356 HP but the torque crossed the 300 ft-lb mark by 3750 rpm. And the torque curve is way flatter.

Altitude added ~500 rpm to the boost threshold and altitude dyno correction applied to a boosted car added about 40hp to the peak hp number it looks to me.

Bob
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Old 11-26-2009, 02:28 AM   #78
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Thats cool, but I thought we were talking about 1.6's not 1.8's or larger.

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Interesting that 2.0L on that graph is mine.

Dyno was done with FM's optimistic altitude correction. But it was at altitude.

I went back to a dyno after I got home here at sea level with the same exact tune.
It was a Dyno Dynamics Dyno. Peak power was measured at 356 HP but the torque crossed the 300 ft-lb mark by 3750 rpm. And the torque curve is way flatter.

Altitude added ~500 rpm to the boost threshold and altitude dyno correction applied to a boosted car added about 40hp to the peak hp number it looks to me.

Bob
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Old 11-26-2009, 02:33 AM   #79
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Originally Posted by apariah View Post
Thats cool, but I thought we were talking about 1.6's not 1.8's or larger.
no you are not seeing his point in that dyno setup is 90% of the results you get.
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Old 11-26-2009, 03:20 PM   #80
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Quote:
Originally Posted by apariah View Post
Thats cool, but I thought we were talking about 1.6's not 1.8's or larger.
My point was the dyno and atmospheric conditions can make a bigger difference allot of the time than turbo size.

My other point. Get more displacement! I ran that same turbo setup on a stock 1.8l with a 99 head it rocked that way too. Boost rise was still smooth and top end power was increasable.

I ran a turboed 1.6l for 7 years before upgrading, should have put in the 1.8 from the start. I think the only reason to stick with the 1.6l is if you are building a car for coolness factor more than engine performance. if that were the case I probably wouldn’t bother with a turbo. Id do IRTB,s or something.

Bob
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