Rate my future setup please... - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 05-19-2010, 07:58 PM   #21
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

On the other hand, cause I feel like a noob today...i searched and just read about injector driver circuitry. Rx7 550's are cheap and easy to come by, and they are low imp like my 460's. So I think I'll look for a set of them.
thirdgen is online now   Reply With Quote
Old 05-19-2010, 09:22 PM   #22
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,193
Total Cats: 2,583
Default

dw600's are completely pnp and work excellent. many adaptronic owners started off with them.

Many of us have moved on up to 1000's BUWAHAHHAHAHA
18psi is offline   Reply With Quote
Old 05-19-2010, 10:05 PM   #23
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

Since the DW 600's are high imp, do I need to modify my ms?
thirdgen is online now   Reply With Quote
Old 05-19-2010, 10:56 PM   #24
Elite Member
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

do you have the circuitry, or an external box for injector resistance now?

the DW units are plug and play, no resistors needed.
shlammed is offline   Reply With Quote
Old 05-20-2010, 10:06 PM   #25
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default Selecting proper turbo

So I'm stumped about the turbo. Currently I probably make about 235 whp at 14 psi. It is fully spooled by 3700rpm.
I want to make 250 whp easily by 10 psi, and be fully spooled by 5000 rpm. I'm thinking 2871, or maybe even 3071? Must be internally wastegated. Please help me choose.
thirdgen is online now   Reply With Quote
Old 05-20-2010, 10:17 PM   #26
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

Why the 10 psi limiter? 250ish WTQ with an IAT of x is what it is regardless of what the KPA happens to be.
Sparetire is offline   Reply With Quote
Old 05-20-2010, 10:23 PM   #27
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

True. I was just using the 10 psi as an example. Meaning, I want to make a lot more power than I do now, with less boost and still have headroom. Where my current turbo is maxed, I want my new turbo to just get started.
thirdgen is online now   Reply With Quote
Old 05-21-2010, 07:20 PM   #28
Elite Member
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

Quote:
Originally Posted by 18psi View Post
completely disagree
in fact I did just that: put in OEM (lower comp though) 9.1:1 pistions and upgraded rods. so far nothing but great results and very satisfied
this just came up with a friend just now and got me thinking actually....


What are the miata pistons good until? or is it just detonation that kills the pistons, but the rods like to bend all over wonky with power?


FYI im thinking could i max out a 2860 or 2871 on stock piston/m-tuned rod combo?
shlammed is offline   Reply With Quote
Old 05-21-2010, 07:33 PM   #29
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,193
Total Cats: 2,583
Default

The general opinion I got when reading up on it was that detonation kills them. Improper tuning, bad gas, knock, etc. Not steady pressure. Their ringlands aren't weak like on a subaru so they don't "just go".

Rods on the other hand, have been known to bend/break even on well running engines. In fact quite a few were pulled from OPERATIONAL engines that were all bent.
18psi is offline   Reply With Quote
Old 05-21-2010, 07:47 PM   #30
Elite Member
iTrader: (8)
 
Join Date: Dec 2008
Location: Kingston, Ontario
Posts: 2,791
Total Cats: 71
Default

Cool... when i was in my nissan... i did this...which is why im not fond of stock pistons:

Name:  240build165.jpg
Views: 2
Size:  65.1 KB
at 7psi with decent timing and lots of fuel....



But, i need to put a new gasket set on my miata since i have a ton of little oil leaks to fix and when i have the head off, i might as well toss in some quick rod action.
shlammed is offline   Reply With Quote
Old 05-21-2010, 07:53 PM   #31
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

So back to me and my thread. I was looking at the GT2871 on the Garrett site and it looks like they come in many different part number and turbine A/R's. Which one do I pick?

Last edited by thirdgen; 05-21-2010 at 08:17 PM.
thirdgen is online now   Reply With Quote
Old 05-21-2010, 08:28 PM   #32
NB/VVT Connoisseur
iTrader: (23)
 
viperormiata's Avatar
 
Join Date: Aug 2008
Location: Key West
Posts: 6,072
Total Cats: 253
Default

Quote:
Originally Posted by thirdgen View Post
So back to me and my thread. I was looking at the GT2871 on the Garrett site and it looks like they come in many different part number and turbine A/R's. Which one do I pick?
I'm pretty much deciding the same thing as you. What you(and me) NEED to remember in choosing a turbo/motor setup is whether or not it's for a street car or a track car.

For street cars, a smaller turbine a/r is great for spool and the 2871 and 28RS will still have good top end power and have headroom for 300+whp.

Street car and internally gated: the 64 a/r is generally chosen.
Track car: 86 a/r is used. Lower egt's/ better top end. Good for cars that are constantly in boost.

Hope this helps.
viperormiata is offline   Reply With Quote
Old 05-21-2010, 09:14 PM   #33
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

If you go here, it lists different 2871's in .64 A/R with many different wheels. How do I know what to choose?
http://www.turbobygarrett.com/turbob...ison_sheet.htm
thirdgen is online now   Reply With Quote
Old 05-21-2010, 09:21 PM   #34
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

If you go here, it lists different 2871's in .64 A/R with many different wheels. How do I know what to choose?
http://www.turbobygarrett.com/turbob...ison_sheet.htm
thirdgen is online now   Reply With Quote
Old 05-21-2010, 09:22 PM   #35
Slowest Progress Ever
Thread Starter
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,811
Total Cats: 183
Default

Damn double posting I phone going in and out of 3g pos. That's what I get for posting from work in the building.
thirdgen is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 12-13-2017 10:04 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
SimExperience fiberglass race seat in Chicago area chris101 Miata parts for sale/trade 2 10-09-2015 10:08 AM
1991 special edition with hard top full part out JC, NJ russian Miata parts for sale/trade 6 10-08-2015 04:01 PM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:58 PM.