0.64 or 0.86 hotside for 280whp goal on a 1.8 - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 02-15-2012, 08:32 PM   #41
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sorry for digging this up, but i'm going back and forth between a tial 0.64 and a 0.86 housing. it'll be on a FM built 1.6 though which doesn't flow anywhere as well as any of the 1.8's. Would it be better to go for the 0.64 to make up for the crappy flowing 1.6 IM/head? it'll be a street/occasional track car, going for the 300s if possible
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Old 02-15-2012, 10:34 PM   #42
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Quote:
Originally Posted by xcoldricex View Post
sorry for digging this up, but i'm going back and forth between a tial 0.64 and a 0.86 housing. it'll be on a FM built 1.6 though which doesn't flow anywhere as well as any of the 1.8's. Would it be better to go for the 0.64 to make up for the crappy flowing 1.6 IM/head? it'll be a street/occasional track car, going for the 300s if possible
I would take the .64 and run a little more boost.
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Old 02-16-2012, 05:57 PM   #43
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Why are you building up a 1.6?
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Old 02-16-2012, 06:18 PM   #44
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My GT2560 did 270 whp on a Dynapack with a restricitve 2.5" exhaust system that had 9 psi of backpressure. With my new 3" exhaust which shows <5 psi, I betcha it'll do > 280 hp.

For 300 whp I wouldn't go with a 0.86 on either a GT2860RS nor a GT2871.
And most especially not a street car with a 1.6.

Last edited by JasonC SBB; 02-16-2012 at 10:25 PM.
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Old 02-16-2012, 07:38 PM   #45
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Originally Posted by JasonC SBB View Post
With my new 5" exhaust which shows <5 psi, I betcha it'll do > 280 hp.

w w wh wh Whattttt???

you have 5" exhaust? I thought mine was biggest! you are making me sad. are you serious?
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Old 02-16-2012, 10:22 PM   #46
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Originally Posted by JasonC SBB View Post
For 300 whp I wouldn't go with a 0.86 on either a GT2860RS nor a GT2871.
And most especially not a street car with a 1.6.
Have you driven either? Is he using a tubular or log manifold? I say .86 GT2860rs at 16-18psi.

Has anyone put a .64 A/R housing on a GT2860rs and like it? If the little housing will work on any Miata it would be a 1.6.

I have a .86 housing I will sell you on the cheap if the .64 doesn't work out...but I think the larger housing is the way to go from the start.
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Old 02-16-2012, 10:26 PM   #47
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Fae, don't feel small, I fixed the typo.
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Old 02-16-2012, 10:26 PM   #48
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Have you driven either? Is he using a tubular or log manifold? I say .86 GT2860rs at 16-18psi.
I have a 0.64 on the way.
For a street car one should go with the smallest turbo that hits your power goals.
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Old 02-17-2012, 02:17 AM   #49
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See this is where you and me completely disagree. I'm not saying one should go with some ginormous mammoth snail for 200whp or something, but I am a firm believer of slightly oversized turbos.

Just a matter of opinion of course, but I think each has their pros and cons and its really up to how you like your power to be delivered.
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Old 02-17-2012, 02:34 AM   #50
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Quote:
Originally Posted by 18psi View Post
See this is where you and me completely disagree. I'm not saying one should go with some ginormous mammoth snail for 200whp or something, but I am a firm believer of slightly oversized turbos.

Just a matter of opinion of course, but I think each has their pros and cons and its really up to how you like your power to be delivered.
Motor is undersized nigg
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Old 02-17-2012, 08:52 AM   #51
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yeah it was already built when I bought it. running a tubular manifold built by full race... who thought a gt35 sized turbo would be an appropriate turbo for this motor..... -_-
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Old 02-17-2012, 09:00 AM   #52
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stock 1.6 head or some work done to it?

2871 will get 280 easily, i say just go with .64 and dont worry about it too much.
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Old 02-17-2012, 09:13 AM   #53
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built by Flying Miata
Wiseco forged Pistons 9:1, 1mm overbore
Pauter forged rods
HKS 264 cams, 9.5 lift
ARP Main cap studs
Flyin Miata Adjustable cam gears
Port and polished cylinder head
Flyin Miata Upgraded valves springs with titanium retainers
Port-match intake and jet clean
Unshrouded valves
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Old 02-17-2012, 09:33 AM   #54
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I still stick by .64, because it sounds like this will primarily be street car. 280 really your goal or you prob gonna keep pushing it?
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Old 02-17-2012, 09:45 AM   #55
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i'm not the OP, i just muddied up the thread with my 1.6 talk. I'd like to be in the 300whp range, but sav says the 2871 isn't a good fit for the 1.6 and that i should just ditch the motor entirely for a vvt 1.8.
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Old 02-17-2012, 09:49 AM   #56
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Buy both and figure out which you like better. Plus then you will have more actual experience to answer this question when it gets asked again in the future.
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Old 02-17-2012, 11:02 AM   #57
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Quote:
Originally Posted by xcoldricex View Post
i'm not the OP, i just muddied up the thread with my 1.6 talk. I'd like to be in the 300whp range, but sav says the 2871 isn't a good fit for the 1.6 and that i should just ditch the motor entirely for a vvt 1.8.
ah yeah, lol. I noticed right before I clicked this thread again that you are not OP.

Swapping turbine housings is pretty quick and easy, and not too expensive either. Swapping motors seems excessive, when you already have a built 1.6....
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Old 02-17-2012, 11:26 AM   #58
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Aww xcoldrice you have 1.6 of thr gods so STFU. YES YOU s hould grt a 2871.
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Old 02-17-2012, 11:43 AM   #59
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are you drunk or did someone re-arange your keyboard?
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Old 02-17-2012, 11:50 AM   #60
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Quote:
Originally Posted by 18psi View Post
are you drunk or did someone re-arange your keyboard?
No that is iKeyboard™
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