turbo tuning - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 03-18-2015, 11:50 AM   #1
Newb
Thread Starter
 
Join Date: Oct 2014
Posts: 25
Total Cats: -11
Default turbo tuning

I'm autocrossing a 1.6 M45/E85 and decided to step up the power.

So I found a turbo'd 1.8, drove it and bought the motor. I'll be reusing my Megasquirt and staying on E85. When I drove it, I found it to be soft 4000-down and hot 5000-higher.

And that looks a lot like a few dyno curves for similar engines I've found around here. Torque building 3000 to 4000 then peaks and stays pretty high.

I want to stay down around 210 max whp and they say that should be easy. But can I flatten the torque curve to make up the missing power between 3000 to 4000, then keep the higher revs more docile? Looking for smooth even power from 3000 to 7000 which matches rpm band I've seen during my runs.
MX5JER is offline   Reply With Quote
Old 03-18-2015, 12:13 PM   #2
Goin Innnnn!!!
iTrader: (7)
 
Chooofoojoo's Avatar
 
Join Date: May 2014
Location: Denver, Co.
Posts: 460
Total Cats: 40
Default

Need specifics on exactly :

What turbo,
What manifold,
Method of Boost control
Pretty much the whole damn turbo setup / design.
Wouldn't hurt to show us the tune as well.

Also wouldn't hurt to have this moved to the DIY turbo discussion, not engine performance.
Further wouldn't hurt to search. The Sticky"I want your spool data" thread comes to memory.
Chooofoojoo is offline   Reply With Quote
Old 03-18-2015, 01:58 PM   #3
Newb
Thread Starter
 
Join Date: Oct 2014
Posts: 25
Total Cats: -11
Default

This is my first aftermarket turbo and I don't know all that stuff. I'm buying, not building this engine. I'll be leaving the tuning to a professional. I'm just interested if others have been able to arrive at a flat torque curve when you don't need all the top end a system is capable of.

I do know it's a T2860R, running a fairly large IC. But I don't know many details beyond that. I was told it was once tuned for 265 whp, but has been detuned since then for street use. I'm low on the learning curve here. I'll go find that thread you referenced, thanks.
MX5JER is offline   Reply With Quote
Old 03-18-2015, 02:52 PM   #4
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,353
Total Cats: 1,319
Default

No, you cannot push the powerband down 1000rpm with tuning. You need to decrease the size of the turbocharger to do that.
Savington is offline   Reply With Quote
Old 03-18-2015, 03:03 PM   #5
Newb
Thread Starter
 
Join Date: Oct 2014
Posts: 25
Total Cats: -11
Default

Quote:
Originally Posted by Savington View Post
No, you cannot push the powerband down 1000rpm with tuning. You need to decrease the size of the turbocharger to do that.
That's the info I was looking for. Thanks.
MX5JER is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 02:05 AM.