pre-dyno tuning / minimizing dyno time and ching-dow - Page 4 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 08-11-2008, 10:12 PM   #61
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by y8s View Post
reality is more that you need excess fuel for complete combustion of the oxygen available because of the non-ideal nature of a motor. fuel sticks to parts, doesn't vaporize well, etc. dump in more than you need and hope for the best. that need has declined as engines are better designed but it's still there.

i dont know about fat/tq and lean/hp but the difference there is probably more engine speed and airflow related. i wonder if that's more a result than a cause.
well, i thought anything fatter than stoichiometric meant unburnt fuel fuel / colloid mixture. However, you have to take into account that I'm a not a chemist, not a tuner, and genuinely dumb to all this ****.

The more research I do, the more I want to let a professional tune the car...but then I run into the same variables I was crying about earlier with ripping me off and shitty ideas on tuning.
hustler is offline   Reply With Quote
Old 08-11-2008, 10:17 PM   #62
Elite Member
iTrader: (3)
 
Mach929's Avatar
 
Join Date: Oct 2004
Location: lansdale PA
Posts: 2,500
Total Cats: 0
Default

Quote:
Originally Posted by hustler View Post
well, i thought anything fatter than stoichiometric meant unburnt fuel fuel / colloid mixture. However, you have to take into account that I'm a not a chemist, not a tuner, and genuinely dumb to all this ****.

The more research I do, the more I want to let a professional tune the car...but then I run into the same variables I was crying about earlier with ripping me off and shitty ideas on tuning.
i bet even with the diy timing map and an afternoon of logging you'll make 250whp easy. get it together have some fun and maybe look into tuning over the winter
Mach929 is offline   Reply With Quote
Old 08-11-2008, 10:30 PM   #63
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by Mach929 View Post
i bet even with the diy timing map and an afternoon of logging you'll make 250whp easy. get it together have some fun and maybe look into tuning over the winter
well I have a track day on 9/20. I also have an 8.8:1 static compression motor, so i can roll the spark way forward...because I'm baller.

Its going to be a real bitch when I get it to the dyno and realize its making more torque and power than I wanted (transmission death), and have to roll it back. lol I think the bore, head, bigger turbo, 3" exhuast, and alignment of the planets spurred by me working on the car will make 250whp pretty ******* easy to hit.
hustler is offline   Reply With Quote
Old 08-11-2008, 11:19 PM   #64
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

Quote:
Originally Posted by Mach929 View Post
i'm pretty sure you want them 1500-1600
as a maximum. sustained 1600 F temps could burn valves over a pretty short time. short term is ok. on a track I'd keep them below 1500 since you'll be in boost for longer periods at a time. (bear in mind that where you measure makes a difference--lets assume this is at the collector pre-turbo)
y8s is online now   Reply With Quote
Old 08-12-2008, 12:09 AM   #65
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,257
Total Cats: 3
Default

Quote:
Originally Posted by hustler View Post
well, the compressed gas pre-turbo is going to be hotter than the gas post turbo.
Would someone care to share where is the best location to place the EGT sensor?

Thanks
Rafa is offline   Reply With Quote
Old 08-12-2008, 01:17 AM   #66
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

Quote:
Originally Posted by Rafa View Post
Would someone care to share where is the best location to place the EGT sensor?

Thanks
I can't speak to the best place, but most people around here are going to put it somewhat close to to the turbo in the manifold / collector. Here's where mine is.. the probe is not in the port but the port's there on the right..

y8s is online now   Reply With Quote
Old 08-12-2008, 08:18 AM   #67
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,257
Total Cats: 3
Default

Thanks for that pic Matt
Rafa is offline   Reply With Quote
Old 08-12-2008, 10:12 AM   #68
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

mine is going as far forward on the downpipe as possible. I've seen taps crack on manifolds in VW's and I'm not playing that game. If I have any problem with the manifold, I plan on sending it back to BEGi without any resistance.
hustler is offline   Reply With Quote
Old 08-12-2008, 11:22 AM   #69
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

Quote:
Originally Posted by hustler View Post
mine is going as far forward on the downpipe as possible. I've seen taps crack on manifolds in VW's and I'm not playing that game. If I have any problem with the manifold, I plan on sending it back to BEGi without any resistance.
For $5 BEGI would have added the EGT bung. They put mine on #4. I drilled and tapped my greddy manifold and never had a problem with cracking.
jayc72 is offline   Reply With Quote
Old 08-12-2008, 11:40 AM   #70
Elite Member
iTrader: (5)
 
Join Date: Mar 2007
Location: NYC
Posts: 1,997
Total Cats: 1
Default

Quote:
Originally Posted by hustler View Post
mine is going as far forward on the downpipe as possible. I've seen taps crack on manifolds in VW's and I'm not playing that game. If I have any problem with the manifold, I plan on sending it back to BEGi without any resistance.
I hope you meant manifold and not downpipe. I can't see how temps post turbo would give you a reliable measure of the heat coming out of your exhaust valves.
johndoe is offline   Reply With Quote
Old 08-12-2008, 01:35 PM   #71
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

I originally had mine tapped right into the pipe but later added a 1/8NPT bung. Part of the reason was the threads got jacked in the original hole and F'd up the collar.

That pic shows the bungus among us.
y8s is online now   Reply With Quote
Old 08-12-2008, 01:45 PM   #72
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by jayc72 View Post
For $5 BEGI would have added the EGT bung. They put mine on #4. I drilled and tapped my greddy manifold and never had a problem with cracking.
I don't want to take the chance.
hustler is offline   Reply With Quote
Old 08-12-2008, 02:01 PM   #73
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,257
Total Cats: 3
Default

Quote:
Originally Posted by jayc72 View Post
For $5 BEGI would have added the EGT bung. They put mine on #4. I drilled and tapped my greddy manifold and never had a problem with cracking.
Jay, do you have a pic of yours?

Thanks
Rafa is offline   Reply With Quote
Old 08-12-2008, 02:23 PM   #74
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

Quote:
Originally Posted by Rafa View Post
Jay, do you have a pic of yours?

Thanks
You want a picture of my bung?

I no longer have the Greddy manifold, and the bung on the BEGI manifold is nearly impossible to see with out removing the manifold, which I don't plan on doing It is under the #4 runner. I would have rather seen it in the collector, but given how it is constructed that would be darn near impossible. I locates the probe JUST into the manifold (my Prosport probe is pretty short), which is a good thing I didn't like how far into the manifold my Autometer probe went.

My EGTS are low compared to my greddy setup. This could have to do with location, accuracy of the probe or the turbo itself and manifold design.

Jay
jayc72 is offline   Reply With Quote
Old 08-12-2008, 02:24 PM   #75
Elite Member
iTrader: (14)
 
Join Date: Mar 2006
Location: Edmonton, AB
Posts: 4,921
Total Cats: 0
Default

Quote:
Originally Posted by hustler View Post
I don't want to take the chance.
THIS is a shocker. Send the manifold to BEGI and have them do it.
jayc72 is offline   Reply With Quote
Old 08-12-2008, 02:26 PM   #76
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by jayc72 View Post
THIS is a shocker. Send the manifold to BEGI and have them do it.
no, I'm talking about taking the chance of it cracking regardless of who does it.
hustler is offline   Reply With Quote
Old 08-12-2008, 06:19 PM   #77
Elite Member
iTrader: (22)
 
Join Date: Dec 2006
Location: Sunny Spanish speaking Non US Caribbean
Posts: 3,257
Total Cats: 3
Default

Quote:
Originally Posted by jayc72 View Post
You want a picture of my bung?

Jay
Are Canadian bungs smaller?
Rafa is offline   Reply With Quote
Old 08-12-2008, 07:32 PM   #78
Tour de Franzia
Thread Starter
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by Rafa View Post
Are Canadian bungs smaller?
i know my American probe is long and rigid. It slips in American just fine, and worked just fine in an Asian bung on Saturday night. I've also used it in an Italian application and it worked very well in both the front and rear bungs.
hustler is offline   Reply With Quote
Old 08-12-2008, 07:39 PM   #79
Elite Member
iTrader: (15)
 
Join Date: Dec 2007
Location: San Antonio, Texas
Posts: 4,889
Total Cats: 28
Default

Quote:
Originally Posted by hustler View Post
mine is going as far forward on the downpipe as possible.
You know that the temperature post-compressor is lower than the temperature pre-compressor, right?
ZX-Tex is offline   Reply With Quote
Old 08-12-2008, 08:15 PM   #80
Elite Member
iTrader: (13)
 
Join Date: Nov 2006
Location: Tigard, Oregon
Posts: 3,908
Total Cats: 0
Default

I'm curious too if an EGT sensor in the DP is worthwhile. I've got the stock narrowband just sitting there doing nothing. Whack a $50 egt sensor in there for more logging info. If the numbers post turbo don't mean much then it's $50 wasted. Dont' need to just throw away Kaish.
cueball1 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Garrett Turbo, 1.8 Oil Pan, & Misc. Stuff nbdooey Miata parts for sale/trade 9 08-30-2017 10:50 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
Why dynos should plot Torque divided by MAP JasonC SBB ECUs and Tuning 11 10-27-2015 05:56 PM
"Chimney Ethanol" E100 MiataGarage Engine Performance 5 09-30-2015 12:04 AM


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 10:57 AM.