1.8L Sr20 T25 turbo DYNO - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-25-2009, 08:17 PM   #1
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default 1.8L Sr20 T25 turbo DYNO

206.3 RWHP / 220 Lbf torque
My baseline when i first got this car before i rebuilt the motor was 98 rwhp!!


Went to the dyno yesterday. Unfortunatly I did not have time to throw my water meth on, so my IAT's were climbing a bit and my tune was VERY conservative.

Condtions/dyno:
65*F
100% Humidity (rain)
Dyno Dynamics

Car:
1996 1.8L freshly rebuilt with M-tuned rods
No ps or ac
Stock Pistons
ACT HD clutch
Megasquirt I hi res code
FM manifold
FM 2.5" downpipe
3" testpipe
3" enthuza catback
Sr20det T25 turbo
Ebay MBC
2.5" intercooler piping
CX racing front mount
CX racing radiator
550cc injectors
Stock coils with colder plugs

12-13 psi. Full boost by 3500. 4th gear pulls.

Running very conservative. 11.5:1 tapering to 11.2:1 at full boost. 14* of timing up top. No knock present. IAT's climbed 35-40* above ambient during the pull, but quickly drop back down.

Name:  DYNOCHART.jpg
Views: 461
Size:  80.9 KB

Name:  dyno4thpull.jpg
Views: 387
Size:  76.4 KB

Last edited by 240_to_miata; 10-25-2009 at 09:26 PM.
240_to_miata is offline   Reply With Quote
Old 10-25-2009, 09:19 PM   #2
Senior Member
iTrader: (8)
 
Join Date: Mar 2006
Location: Indianapolis, IN
Posts: 758
Total Cats: 5
Default

Nice - I have nearly the same setup (I have a 3" magnaflow metal cell cat and an Absurdflow log manifold). I figured I was probably just north of 200whp, now you have pretty much proved it
boileralum is offline   Reply With Quote
Old 10-25-2009, 09:21 PM   #3
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

Remember, I could lean out my set up a decent amount (closer to 12:1) and add a degree or 2 of timing and probably gain 5-10 horse too. Id say this setup right now before water meth is a strong 215 rwhp setup.

I had 560 miles on the new motor when i dynoed
240_to_miata is offline   Reply With Quote
Old 10-25-2009, 11:07 PM   #4
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,704
Total Cats: 237
Default

Nice. good numbers, and nice spoool.
Fireindc is offline   Reply With Quote
Old 10-26-2009, 12:21 PM   #5
Junior Member
 
Join Date: Aug 2009
Posts: 58
Total Cats: 0
Default

If you pull some fuel and add timing after peak torque you'd still be safe and could gain quite a bit more top end.
mafoose is offline   Reply With Quote
Old 10-26-2009, 12:44 PM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

^what he said.

looks good, pretty much spot on for that turbo and boost.
Braineack is offline   Reply With Quote
Old 10-26-2009, 01:08 PM   #7
Elite Member
iTrader: (7)
 
Join Date: Jan 2008
Location: Knoxville, TN
Posts: 2,121
Total Cats: 44
Default

Thats pretty damn solid.

Any plans on going with a GT2560r in the future or not worth it in your build? They're very similiar turbos, right? GT25 is ball bearing, T25 is journal?
flier129 is offline   Reply With Quote
Old 10-26-2009, 01:14 PM   #8
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

the sr20 turbo is closer to a journal bearing 2554.
Braineack is offline   Reply With Quote
Old 10-26-2009, 01:17 PM   #9
Elite Member
iTrader: (28)
 
Join Date: May 2008
Location: St. Augustine FL
Posts: 2,310
Total Cats: 2
Default

hrmm looks like I'll be upping the boost.... I'm only at 7-8 max lol looks like my ***** weak!! sucky part about my setup is I need a clutch before I can even dyno lolz... good solid numbers there, now time to up it lol
p51hellfire is offline   Reply With Quote
Old 10-26-2009, 01:28 PM   #10
Senior Member
iTrader: (3)
 
Join Date: Jul 2005
Location: Connect-I-Cut
Posts: 1,431
Total Cats: 0
Default

You need to up the boost. If I had rods like you I would be at 18psi
miataspeed2005 is offline   Reply With Quote
Old 10-26-2009, 01:31 PM   #11
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

the compressor wheel is mighty smaller and doesn't really have much more to give up top, but you'll benefit from the mid-range torque for sure.



25 lb/min = roughly 230hp


look how it compares to my 30 lb/min wheel:

Braineack is offline   Reply With Quote
Old 10-26-2009, 02:01 PM   #12
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

Quote:
Originally Posted by miataspeed2005 View Post
You need to up the boost. If I had rods like you I would be at 18psi
My IATS were already climbing, no point in bringing the turbo out of the efficiency range.

I know i could have gotten more power with less fuel and more timing, b ut i didnt go agressive at all because i know i will be retuning soon for water meth anyway.
240_to_miata is offline   Reply With Quote
Old 10-26-2009, 02:19 PM   #13
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

Measure them pre-IC to be certain. If your IC is 90% efficient and the turbo dumps in an extra 200*F, you'll only see 20*F more at your sensor.
Braineack is offline   Reply With Quote
Old 10-26-2009, 02:46 PM   #14
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

Quote:
Originally Posted by Braineack View Post
Measure them pre-IC to be certain. If your IC is 90% efficient and the turbo dumps in an extra 200*F, you'll only see 20*F more at your sensor.
so you are saying that may just be the intercooler heatsoaking ?
240_to_miata is offline   Reply With Quote
Old 10-26-2009, 02:58 PM   #15
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

why do you have less spark advance above 5500rpm than before? I don't think you found MBT there so do you have an excuse?

I've found that getting on the dyno when rainy, regarless of correction #'s, always makes the graph look like ****. There's also so much humidity that I don't trust the spark #'s.

Get on the dyno when its nice outside, add some spark up top, and get your AFR spot-on. I had to adjust my IAT/CLT curves a bit to get them perfect so they don't change when its hot or cold out.
hustler is offline   Reply With Quote
Old 10-26-2009, 03:11 PM   #16
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

Not too bad for the T25 off the SR... But that as said before, that is about the max you want to run on this turbo as it is really only efficient to 14 psi. After that it's all hot air. Nice numbers though. Ever thought about going up to a Pulsar GTi-R T28 w/ S14 T28 compressor housing? They are supposed to be good for extra horsepower over even the S15 T28... Thread: Stock T25/28 Turbo Specs - 240SX Forums (In Post #1)
thagr81 us is offline   Reply With Quote
Old 10-26-2009, 03:17 PM   #17
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,900
Total Cats: 1,792
Default

Quote:
Originally Posted by 240_to_miata View Post
so you are saying that may just be the intercooler heatsoaking ?
I'm saying normally there's a delta of 18-20*F per psi through a turbo. Say you pump it to 15psi but you start dumping in 200*F and little extra airflow volume, you'd only see an extra 20*F at your sensor since the IC does an awesome job removing the extra heat.

It's like when paul made 300rwhp on his monster at 14psi, but at 17psi he only made 10rwhp more, yet he made a good 30rwtq in the mid-range where his turbo was still efficient.
Braineack is offline   Reply With Quote
Old 10-26-2009, 04:03 PM   #18
Elite Member
Thread Starter
iTrader: (2)
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

Quote:
Originally Posted by thagr81 us View Post
Not too bad for the T25 off the SR... But that as said before, that is about the max you want to run on this turbo as it is really only efficient to 14 psi. After that it's all hot air. Nice numbers though. Ever thought about going up to a Pulsar GTi-R T28 w/ S14 T28 compressor housing? They are supposed to be good for extra horsepower over even the S15 T28... Thread: Stock T25/28 Turbo Specs - 240SX Forums (In Post #1)
Yeah I was big into the 240 world in highschool. I upgraded from the turbo that is now on my miata to an s14 single ball bearing T28 and gained a lot of power and better spool . I may pick one up, but to be honest tires/wheels/paint/suspension are higher on my list now that i am above 200 rwhp. The car moves for what it is, now i gotta make it stick.
240_to_miata is offline   Reply With Quote
Old 10-26-2009, 07:13 PM   #19
Newb
 
Join Date: Sep 2009
Location: Marietta, GA
Posts: 37
Total Cats: 0
Default

Damn that sounds like a nice setup! You got any pics? I didn't realize there were many SR20 swaps going on here. I thought they required crazy modification of the car. Is there some sort of kit out there? Or how does one approach it?
miatata is offline   Reply With Quote
Old 10-26-2009, 07:20 PM   #20
meatbag
iTrader: (50)
 
gospeed81's Avatar
 
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26
Default

Quote:
Originally Posted by miatata View Post
Damn that sounds like a nice setup! You got any pics? I didn't realize there were many SR20 swaps going on here. I thought they required crazy modification of the car. Is there some sort of kit out there? Or how does one approach it?
Thread title:

1.8L SR20 T25 turbo dyno

The 1.8L part means it's the Mazda 1.8L....with the TURBO (T25) off the SR20.
gospeed81 is offline   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 59 12-15-2017 09:00 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 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 05:10 AM.