Went to the dyno today. - 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 06-06-2008, 01:43 PM   #21
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

hmm, thats shitty. I havent had a good look at the exhaust since i got it. I noticed a large improvement. Maybe i will take it to a different guy and ask him to put it up and look for what he thinks may be restricting it and tell him that i will pay him to fix whatever it is.
wes65 is offline   Reply With Quote
Old 06-06-2008, 01:58 PM   #22
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,242
Total Cats: 290
Default similar experience

Quote:
Originally Posted by Braineack View Post
...since we know that turbo should be good for torque to redline a case of excessive back pressure would be wasting energy pushing exhaust out of the head instead of pushing the pistons down.
My first dyno plot looks very similar with a torque fall. I'm running a universal cat that flows <300cfm and my ecu pulled out a full 10* of IGN advance (thus peak hp at 5700rpm).
m2cupcar is offline   Reply With Quote
Old 06-06-2008, 02:01 PM   #23
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

he has 18* at redline.
Braineack is offline   Reply With Quote
Old 06-06-2008, 02:23 PM   #24
Elite Member
iTrader: (5)
 
m2cupcar's Avatar
 
Join Date: Jan 2005
Location: Atlanta
Posts: 7,242
Total Cats: 290
Default

oh, oops
m2cupcar is offline   Reply With Quote
Old 06-06-2008, 02:37 PM   #25
:(
iTrader: (7)
 
Join Date: Jul 2006
Location: nowhere
Posts: 8,281
Total Cats: 2
Default

nice job wess the peeps at automotion are definatley cool. They dont run corrected numbers most of the time unless you ask them to. Next time you go back try the 0-60 and 1/4 mile option cyndie i believe her name was says it is a very consistant indicator on what you could run with out spinning etc.
magnamx-5 is offline   Reply With Quote
Old 06-06-2008, 03:56 PM   #26
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

yeah, cyndie or however you spell her name. That was her. It was a great experience and i definitely will go back.
wes65 is offline   Reply With Quote
Old 06-06-2008, 03:57 PM   #27
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Quote:
Originally Posted by Braineack View Post
if i log my ebc against wastegate, it's silly......give me a sec.
what do you mean log it against your wastegate?
wes65 is offline   Reply With Quote
Old 06-06-2008, 04:14 PM   #28
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

if i log a 3rd gear pull utilizing my ebc solenoid vs making the same psi with my wategate.

I make 11psi with my wastegate, i run 12psi with my ebc. I make 12psi at 3750RPM when i use my EBC. I make 11psi at 4900RPM with an open wastegate line.
Braineack is offline   Reply With Quote
Old 06-06-2008, 04:16 PM   #29
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

wow, so mbc is about middle ground?
wes65 is offline   Reply With Quote
Old 06-06-2008, 04:19 PM   #30
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

yeah, a MBC is much improved. the reason is being able to keep the wastegate closed while you make your target boost level. But even a mbc has to start opening as the preload of the spring gets overwhelmed, this cracks open the wategate, and you loose spooling power as the exhaust fails to pass over the turbine.
Braineack is offline   Reply With Quote
Old 06-06-2008, 04:43 PM   #31
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

yeah, im running an mbc right now. I can only imagine the shitty spool if i was running wastegate pressures.
wes65 is offline   Reply With Quote
Old 06-06-2008, 04:44 PM   #32
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

so brain, what does your spark map look like? I would like to see if i can get it to spool a bit quicker.
wes65 is offline   Reply With Quote
Old 06-06-2008, 05:02 PM   #33
Junior Member
iTrader: (4)
 
Join Date: Nov 2007
Location: Southern Illinois
Posts: 112
Total Cats: 2
Default Driving Impressions???

I know you are not totally happy with your dyno sheet but what are your driving impressions of your current set and tune? Taking the dyno sheet out of the picture, is this tune/setup seem like something you could live with easily? Sorry for all the questions............
skipstr is offline   Reply With Quote
Old 06-06-2008, 05:06 PM   #34
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 407
Default

if you want to see your maximum spool potential...

set your boost spark/fuel cut at your max boost

and remove your WG line*






*AT YOUR OWN DAMN RISK!
y8s is offline   Reply With Quote
Old 06-06-2008, 06:38 PM   #35
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

lol, i guess that would work but no.

Quote:
Originally Posted by skipstr View Post
I know you are not totally happy with your dyno sheet but what are your driving impressions of your current set and tune? Taking the dyno sheet out of the picture, is this tune/setup seem like something you could live with easily? Sorry for all the questions............
I am very happy with the way the car drives. The only thing I've lost to was an 11 second trans am and i beat him once because he couldn't hook up. The car pulls hard and the power is very usable. I was worried about the spool time of the bigger gt28 and you can see it on the dyno but as far as daily driving, not a big deal. I still have plenty of passing power and i can fill gaps in traffic very easily. Honestly, if i hadn't dyno'ed it, i wouldn't be looking for more power. However, now that i see that the power is there for the taking, i want it. now. I'm looking for a stockish c6 vette to go against. That is kind of a benchmark for me.
wes65 is offline   Reply With Quote
Old 06-08-2008, 02:51 PM   #36
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

Okay, i got to thinking, would a slipping clutch cause my dyno chart to look like this? I have noticed my clutch slipping lately. I raced an srt4 from a dig and i had to just let out the clutch slip was so bad. I'm going to call the guy that sold me the clutch and see what he can do to help me out.

(all races described in this post were performed on a track, street racing is illegal and dangerous.)
wes65 is offline   Reply With Quote
Old 06-08-2008, 10:35 PM   #37
Senior Member
iTrader: (6)
 
nester's Avatar
 
Join Date: Sep 2005
Location: Houston, TX
Posts: 812
Total Cats: 0
Default

Quote:
Originally Posted by Braineack View Post
mustang dynos read fairly low compared to the SAE standard dynojet dyno,
Not that one. My stock 2003 made 130hp on that same dyno.


http://gallery.wewt.net/albums/dyno/IMG_1230.sized.jpg
nester is offline   Reply With Quote
Old 06-09-2008, 10:48 AM   #38
Senior Member
Thread Starter
iTrader: (7)
 
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,371
Total Cats: -1
Default

So i am thinking that it is a little clutch slip action. I am going to swap the clutch and try to make it to the dyno again.
wes65 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Why dynos should plot Torque divided by MAP JasonC SBB ECUs and Tuning 11 10-27-2015 05:56 PM
MS PNP requires reading and following directions??? satisfied MEGAsquirt 141 10-06-2015 11:44 AM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85) Lincoln Logs Dynos and timesheets 4 09-23-2015 01:26 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 01:01 AM.