2560 actuator question - 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 07-26-2014, 02:23 PM   #1
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 68
Total Cats: -4
Default 2560 actuator question

I have a used begi system with mspnp1, etc going in one of these days into my 96.

I noticed the previous owner of the turbo kit has the uprated 11-15psi actuator on the turbo. Wondering if I should get a lower rated actuator (7psi), or just man up, and tune on the heavier spring? Am I being paranoid?
momotaro is offline   Reply With Quote
Old 07-29-2014, 12:54 PM   #2
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

Pretty good question.

It really depends on a bunch of other components.

Most importantly, do you have the fueling parts to support 11+psi of boost from this particular turbo? If you have stock injectors, the answer is probably no. You will be flowing enough air from a 2560 at 11psi to be running lean under boost and that's not good.

Secondarily, 11+psi from a 2560 will burn up a stock clutch a lot faster than 7psi will.

Personally, if/when I get my setup built I will be running a lot more than 7psi out of it because the power gains are large relative to the cost gains. You already spent the cash, you may as well spend a bit more and enjoy it properly. Meaning, get injectors that will have some headroom for your setup and a decent clutch.

For now, if you are on stock injectors and all, a 7psi actuator is a good idea.
Sparetire is offline   Reply With Quote
Old 08-15-2014, 01:26 PM   #3
Senior Member
iTrader: (2)
 
Join Date: Jun 2012
Location: New Braunfels,TX
Posts: 1,141
Total Cats: 51
Default

If you have a stock bottom I say **** that noise get like a 4-8psi spring and use ebc to get it to your desired level. On a 2560 I wouldnt go over 12psi on stock bottom. My current setup is 10.5-11psi and its solid. That is with a good tune too. Your gonna want to go slow and start low with boost and tune your setup really well and then adjust VE as you increase boost through CL.
ScottyP3821 is offline   Reply With Quote
Old 08-16-2014, 04:01 AM   #4
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,186
Total Cats: 2,582
Default

I've tuned NA8's to 14-15psi on a 2560 no problem.
You should probably still get the lower pressure one though, and use an mbc or ebc to bump it back up to desired level so you don't miss out on the lowend/midrange torque onset
18psi is offline   Reply With Quote
Old 08-25-2014, 01:54 PM   #5
Junior Member
Thread Starter
 
Join Date: Aug 2013
Posts: 68
Total Cats: -4
Default

Thanks for the replies. For completeness: I have rx-8 yellow injectors and a new ACT HD in place already. I think I will keep my eye out for a 7psi actuator and then MBC or EBC up as needed.


I'll ask in the classifieds section of this forum.

Min
momotaro is offline   Reply With Quote
Old 08-28-2014, 02:25 PM   #6
Junior Member
iTrader: (1)
 
Join Date: Nov 2013
Posts: 79
Total Cats: -8
Default

I'll have an HKS adjustable actuator for sale shortly, if interested?
ennjay is offline   Reply With Quote
Old 08-28-2014, 02:58 PM   #7
Senior Member
iTrader: (8)
 
Join Date: Jan 2012
Location: Azusa, CA
Posts: 1,376
Total Cats: 80
Default

Not 100% sure if the ms1 has ebc but you can use a lower 7 psi wastegate actuator and use the electronic boost solenoid to set your boost level to anything greater than that. I have a couple maps that I can switch to for 8psi, 10 psi and 13 psi by just loading a different map to the ECU.

A manual boost controller is another option.
cyotani is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
15x10 - 15x11 6UL @ 949 Racing emilio700 Wheels and Tires 151 06-02-2017 03:36 PM
1994 Spec Miata Race Car SM/SM2/SSM For Sale Quinn Cars for sale/trade 6 10-23-2016 08:58 AM
Low oil pressure after 1.8 swap and new turbo setup JesseTheNoob DIY Turbo Discussion 15 09-30-2015 03:44 PM
NA Seat Sliders and Seat Belt Receivers skipstr Miata parts for sale/trade 2 09-28-2015 11:53 PM


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 05:12 PM.