1.6L w/ GT2560R + E85 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 06-23-2016, 11:20 AM   #1
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default 1.6L w/ GT2560R + E85

I'd like to thank this forum and all the users on it. Been super useful and I've gained a tremendous amount of knowledge! I know the 1.6 isn't the preferred motor on this forum but it's been a great learning experience, and this was my first time tearing down an engine and rebuilding it.

Car:
'92 1.6L
FM DIY kit w/ hybrid 2.5" - 3" Exhaust
Braineack built MS3X
OEM-ish stock rebuild
Scat Rods w/ arp bolts
ACL bearings
Toyota COPS
Flow force injectors 700CC @ 4Bar
5xracing AFPR
DW200 fuel pump
EBC

The tuner said the FM hi-flow cat is the bottleneck and is hurting my spool up, and a test pipe would help a lot. Thoughts?



Obligatory potato quality video:

Last edited by .one lane; 06-23-2016 at 03:05 PM.
.one lane is offline   Reply With Quote
Old 06-23-2016, 12:34 PM   #2
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,197
Total Cats: 2,584
Default

'Grats, looks like some healthy numbers. How much boost?

I'm not sure how much it would help spool-up, but likely would free up some top end power and keep the car from nosing over after 6

The spoolup is never going to be good on a 1.6
18psi is offline   Reply With Quote
Old 06-23-2016, 01:11 PM   #3
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

Thanks! It's at 15psi with the stock 7psi internal wastegate.

I guess the only way to gain quicker spool is to swap a 1.8, which I'm planning on doing later down the road lol.
.one lane is offline   Reply With Quote
Old 06-23-2016, 02:47 PM   #4
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 2,407
Total Cats: 200
Default

Nice job dude.
ryansmoneypit is offline   Reply With Quote
Old 06-23-2016, 03:26 PM   #5
Elite Member
iTrader: (5)
 
Join Date: Oct 2007
Location: Canton, Ga
Posts: 1,707
Total Cats: 19
Default

Looks like it would be a blast to drive.
Stealth97 is offline   Reply With Quote
Old 06-23-2016, 06:42 PM   #6
Sadfab Union President
iTrader: (3)
 
Join Date: May 2014
Location: Kansas
Posts: 2,690
Total Cats: 113
Default

You could be spooling around 1K sooner if you ask me. What are you using to get to 15 psi, EBC?

https://www.miataturbo.net/dynos-tim...attempt-87880/


nvm, I'm dumb. Carry on


deezums is offline   Reply With Quote
Old 06-23-2016, 06:47 PM   #7
Elite Member
iTrader: (6)
 
Join Date: Feb 2013
Location: Staunton, Va
Posts: 2,407
Total Cats: 200
Default

Well I'm kind of interested. Tell me how.
ryansmoneypit is offline   Reply With Quote
Old 06-23-2016, 06:51 PM   #8
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,780
Total Cats: 1,106
Default

Quote:
Originally Posted by ryansmoneypit View Post
Well I'm kind of interested. Tell me how.
Deezums thought it was a 2554 at first, not a 2560. That is why he thought it could spool quicker.
shuiend is offline   Reply With Quote
Old 06-23-2016, 07:09 PM   #9
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

Using the mac 3-port solenoid.

From the tuner.

'91 Stock motor w/ 2560r running flex fuel sensor. Blue is 91 and red is e85



Looks like I'm ~15 ft-lb less @ 3k and a lot worst throughout the rpm range lol. The only difference is (exhaust wise) is a test pipe.

Also, do you guys generally run catless? I was catless when I had my wrx and I couldn't stand the fumes.
Attached Thumbnails
1.6L w/ GT2560R + E85-cgl2kwo.jpg  
.one lane is offline   Reply With Quote
Old 06-23-2016, 07:09 PM   #10
Junior Member
iTrader: (1)
 
Join Date: Jun 2014
Location: Metro Detroit
Posts: 270
Total Cats: 26
Default

Nice numbers, 'grats on your first engine rebuild. The dynojet will bring out the worst in boost threshold since it doesn't load the engine as much as real-world. I'm running a GT2554R with the same FM manifold exhaust as you and the boost threshold is realistically about 500 RPM sooner. A test pipe might help a little, but not "a lot". VVT would help a lot. Twin-scroll would help a lot. Neither of those are realistic options for us though.

Take a look at your timing map; you might be giving up spool that way. You also don't want your AFR's overly rich below the boost threshold; you want to use the higher EGT's to help spool the turbo.
Ryephile is offline   Reply With Quote
Old 06-26-2016, 10:41 PM   #11
Junior Member
 
Join Date: Sep 2006
Location: Reading PA
Posts: 78
Total Cats: 11
Default

Your numbers look good and the curves are nice and smooth. I love E85. I disagree with your tuner, the cat is not hurting spool up. A restriction in the exhaust will show up at high RPM as the torque falling off, not long spool up time. Your torque is holding pretty steady. However, something is slowing spool up. I have only dynoed five 1.6L engines with GT2560s on them and only two at 15psi or above. Both of those engines passed 200ftlbs between 3800 and 4200rpm. On all my dyno runs the engines are making at least 140ftlbs at 3000RPM.

What is you altitude? Setups like yours take forever to spool up above 3000ft.
What does the ignition map look like in the 3500 to 3500 RPM?
Are the EBC settings keeping the wastegate closed as long as possible to spool up the turbo?
Ken Hill is offline   Reply With Quote
Old 06-26-2016, 11:20 PM   #12
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

I'm at sea level and here is the ignition map:



I'm not sure if the ebc is holding the wastegate closed as long as possible. How would log that?
Attached Thumbnails
1.6L w/ GT2560R + E85-2rn3jir.png  
.one lane is offline   Reply With Quote
Old 06-27-2016, 01:23 AM   #13
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,197
Total Cats: 2,584
Default

it should already be in your log. boost duty vs map
that's a pretty aggressive map. I like
18psi is offline   Reply With Quote
Old 06-28-2016, 12:15 PM   #14
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

Thanks, 18psi! I'll post a log/screen cap when I get a chance to do a pull.
.one lane is offline   Reply With Quote
Old 02-23-2017, 05:44 PM   #15
PSI
Junior Member
 
Join Date: Apr 2016
Location: Centerville, OH
Posts: 61
Total Cats: 9
Default

Quote:
Originally Posted by .one lane View Post
Thanks, 18psi! I'll post a log/screen cap when I get a chance to do a pull.
I know this is kind of an older thread, but I'd like to take a look at your logs for comparison to my similar setup.
PSI is offline   Reply With Quote
Old 02-24-2017, 11:51 AM   #16
Junior Member
Thread Starter
 
Join Date: May 2011
Location: Signal Hill, CA
Posts: 246
Total Cats: 11
Default

Totally forgot to post up the logs. I'll have to rummage through my computer for it when I get off work.
.one lane is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1.6 Built Motor, M45 supercharger, OBX Header, RX7 Injectors comradefks Miata parts for sale/trade 14 04-14-2015 04:41 PM
NA Garage Vary front lip, Boss frog Mild Steel 2.5" Test Pipe (1.6L) mad doc Miata parts for sale/trade 2 07-24-2013 06:28 PM
Greddy 1.6L Turbo Kit, ARTech 2.5" Downpipe, MSv1, 460cc Redtop Injectors mad doc Miata parts for sale/trade 39 11-12-2012 01:48 AM
Stock 1.6 Air flow meter Drewkeen WTB 4 09-25-2010 01:24 AM
WTB: stock 1.6 cat disturbedfan121 WTB 4 03-06-2008 03:22 AM


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 04:44 PM.