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Old 09-04-2008, 07:24 PM   #21
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The starion can't be helping - 20 year old tech.

What mani, exhaust, cat, IC piping, route, etc. are you running? Pics?
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Old 09-04-2008, 08:27 PM   #22
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Originally Posted by bryantaylor View Post

does charge pipe diameter affect spool? intake going into the turbo? port out the exhaust ports/mani inlet? anything worth doing?
the intake sure does. i remember testing with and without my intake assembly (stock subaru intake pipe, cheap cone filter and bypass pipe) and remember the threshold being about 250 rpm lower as well as spool being much faster in the range between 10" Hg vacuum and 2-3 psi boost.
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Old 09-04-2008, 09:26 PM   #23
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Originally Posted by cueball1 View Post
The starion can't be helping - 20 year old tech.

What mani, exhaust, cat, IC piping, route, etc. are you running? Pics?
ebay cast mani, 2 1/2 inch downpipe doing to a 3 inch exhaust, no cat, 2 inch hot side and 2 1/2 coming out of the intercooler. and the air filter is right on the turbo.
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Old 09-04-2008, 09:27 PM   #24
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Originally Posted by patsmx5 View Post
Gain 10-25% more power and drop spool 500-1000 RPMs.

http://books.google.com/books?id=283...um=1&ct=result
hell yeah, free bitches!

thanks man
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Old 09-04-2008, 09:41 PM   #25
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hell yeah, free bitches!

thanks man
That only has the first few chapters. All the good stuff is not shown. But it's a good read none the less. But all the good info you need to know is not shown. I just bought a copy of that and another book about building short blocks by the same author.

And yesterday you couldn't stop calling me a dumbass or picking over semantics.
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Old 09-04-2008, 09:46 PM   #26
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And yesterday you couldn't stop calling me a dumbass or picking over semantics.
that's because i am a dick, lol
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Old 09-05-2008, 02:18 AM   #27
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Originally Posted by bryantaylor View Post
and the air filter is right on the turbo.
Might want to fix that. I had mine there for a while, sucks the hot air right off the manifold. I put a 90 degree bend with the filter on the end. It made a noticeable difference in power.
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Old 09-05-2008, 02:24 AM   #28
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bryan you didn't answer the Q about how much peak power you make.
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Old 09-05-2008, 11:42 AM   #29
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well even with my filter on the turbo, i only see a max of about 130 IAT under full boost.

jason-i have no idea how much power its making, never even touched a dyno.
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Old 09-05-2008, 12:12 PM   #30
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Depending on your peak power, there may be smaller turbos that can give the same peak power, while moving your desired "jet thrust", down from 5000 RPM to 4000 RPM.

You also didn't answer how long you've had a turbo miata.
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Old 09-05-2008, 01:51 PM   #31
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Originally Posted by JasonC SBB View Post
Depending on your peak power, there may be smaller turbos that can give the same peak power, while moving your desired "jet thrust", down from 5000 RPM to 4000 RPM.

You also didn't answer how long you've had a turbo miata.
i have been turbo for about a year now. i was actually going to go with a 16g or a standard t3, but i got such a good deal on this turbo it was impossible to pass up. real turbonetics just rebuilt for $100
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Old 09-05-2008, 02:55 PM   #32
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what is "full boost"? 5psi? 15psi?
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Old 09-05-2008, 03:05 PM   #33
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what is "full boost"? 5psi? 15psi?
right now about 12psi.

it was make just a couple of pounds in the lower rev range, but about 4300rpm or so, it just jumps 10psi instantly.

its kinda fun, its like
lag lag lag lag, .....OMG!
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Old 09-05-2008, 03:16 PM   #34
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Originally Posted by bryantaylor View Post
right now about 12psi.

it was make just a couple of pounds in the lower rev range, but about 4300rpm or so, it just jumps 10psi instantly.

its kinda fun, its like
lag lag lag lag, .....OMG!
My old setup would make 6psi from 3000 on up to about 4300. At 4300, It would almost instantly go to my boost setting...be it 15psi or 28psi. I had very little lag when I was above boost threshold.
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Old 09-05-2008, 03:20 PM   #35
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Originally Posted by bryantaylor View Post

its kinda fun, its like
lag lag lag lag, .....OMG!



choose your weapon.
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Old 09-05-2008, 04:07 PM   #36
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jeez use my lamest run. use run 5.
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Old 09-05-2008, 04:37 PM   #37
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i have been turbo for about a year now.
Ah, so you're the newbie, dickwad. I've been turbo'ed for 10x longer than you. You just discovered the reason I advocate, for a street car, the smallest turbo that meets your realistic peak power goals. Unless your revs are always above 4500, you'll be caught flatfooted if you need power NOW.

If you do headwork or some other changes to greatly improve spoolup, you will likely spend more than the money you saved on your $100 turbo. Even then the improvements will be less than switching to a smaller a/r housing or smaller turbo.

Sell your turbo to some other sucker who wants "jet thrust" at 5000 RPM and put the money to a smaller T3. Markp's favorite T3 config is good for 300whp and spools close to a '2560.
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Old 09-05-2008, 04:46 PM   #38
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Quote:
Originally Posted by JasonC SBB View Post
Ah, so you're the newbie, dickwad. I've been turbo'ed for 10x longer than you. You just discovered the reason I advocate, for a street car, the smallest turbo that meets your realistic peak power goals. Unless your revs are always above 4500, you'll be caught flatfooted if you need power NOW.

If you do headwork or some other changes to greatly improve spoolup, you will likely spend more than the money you saved on your $100 turbo. Even then the improvements will be less than switching to a smaller a/r housing or smaller turbo.

Sell your turbo to some other sucker who wants "jet thrust" at 5000 RPM and put the money to a smaller T3. Markp's favorite T3 config is good for 300whp and spools close to a '2560.
Mark told me all about his 300whp capable turbo. Said full boost was at 4500 RPM. I do believe most 2560's are in full boost before that. Maybe Mark needs to clear this up.

Now I understand a lot of people hate lag. I do too. However, some people hate having a motor with no "top end". I'm one of those guys. I'm gonna put a big t3/t4 on my 99' because I want some top end power. I'll take the lag for the top end power. Granted I'm going for 350whp. Still, there's probably smaller turbo's that will get me there, but I'll pass.
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Old 09-05-2008, 04:52 PM   #39
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jeez use my lamest run. use run 5.

it's just to illustrate the point.
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Old 09-05-2008, 05:10 PM   #40
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who's got a 2560 cheap? nobody? ever?
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