Jason's reverse Build - Page 19 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Build Threads Building a motor? Post the progress here.

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 04-13-2010, 10:09 PM   #361
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

F Yah!
Faeflora is offline   Reply With Quote
Old 04-14-2010, 05:46 PM   #362
Junior Member
iTrader: (1)
 
Join Date: Sep 2009
Location: Shoreline, WA
Posts: 143
Total Cats: 0
Default

Hahaha meth head
Andifer is offline   Reply With Quote
Old 04-14-2010, 07:06 PM   #363
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,198
Total Cats: 2,584
Default

that bucket of meth gave me dirty thoughts

Jay is one of my big turbo hero's
18psi is offline   Reply With Quote
Old 04-22-2010, 12:31 AM   #364
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Quote:
Originally Posted by cueball1 View Post
Comparison for those that can't scroll back a couple pages...

Aftermarket mani at 17.5 psi



99 intake at 19psi

That's what I thought. While things fall off at the end, it doesn't seem like the mani bought you a hell of a lot?? What's your feeling, in the car - or am I just dumb and missing something?
AbeFM is offline   Reply With Quote
Old 04-22-2010, 01:25 AM   #365
Senior Member
iTrader: (3)
 
Join Date: Aug 2005
Location: Gig Harbor, WA
Posts: 504
Total Cats: 3
Default

Quote:
Originally Posted by JayL View Post
Yeah, the knock threshold was a little too low so it pulled timing. Didn't realize this was what was happening until the car was off the dyno. Although it's smoother, the built engine is much noisier than my stock engine.
This is regarding the flipside manifold. It probably would have held the power longer if the knock sensor hadn't pulled timing.
TurboRoach is offline   Reply With Quote
Old 04-22-2010, 01:26 AM   #366
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

Quote:
Originally Posted by AbeFM View Post
That's what I thought. While things fall off at the end, it doesn't seem like the mani bought you a hell of a lot?? What's your feeling, in the car - or am I just dumb and missing something?
It took me 1.5# more boost with the 99 intake manifold to equal the Flipside manifold using the same timing map. That difference will just get bigger as more air is pushed through it. I also didn't play around with the timing at all. Any areas over 7000 rpm don't have any timing in them (knock sensor set too sensitive and it pulled timing) and that's the reason it falls off severely there. These runs were purely to get a comparison.

Flipside currently has plans for extending the runners out and upwards to add about 4" of length to them. I won't be part of that development because I'm selling it as soon as I get it back, but perhaps the next owner will contact Rob and work with him to finish this project.
JayL is offline   Reply With Quote
Old 04-22-2010, 07:13 AM   #367
Newb
 
Join Date: Sep 2008
Posts: 5
Total Cats: 0
Default

why would you go through all of this and then sell it?
i thoiught you might have enjoyed it abit first..
azura is offline   Reply With Quote
Old 04-23-2010, 12:47 AM   #368
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

Quote:
Originally Posted by azura View Post
why would you go through all of this and then sell it?
i thoiught you might have enjoyed it abit first..
Sometimes things just don't work out and this is one of those times. There's just some things that I couldn't get past so I'm moving on.
JayL is offline   Reply With Quote
Old 04-23-2010, 06:09 AM   #369
Newb
 
Join Date: Sep 2008
Posts: 5
Total Cats: 0
Default

shame, im from the UK and you inspired me all the way over here, although over here i wont be putting mine on a drag strip, you keep me thinking of putting on a large supercharger maybe mp90 and pushing the bounderies.
thanks for that..

jon.
azura is offline   Reply With Quote
Old 04-24-2010, 06:47 PM   #370
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Quote:
Originally Posted by JayL View Post
It took me 1.5# more boost with the 99 intake manifold to equal the Flipside manifold using the same timing map. That difference will just get bigger as more air is pushed through it. I also didn't play around with the timing at all. Any areas over 7000 rpm don't have any timing in them (knock sensor set too sensitive and it pulled timing) and that's the reason it falls off severely there. These runs were purely to get a comparison.
You're talking about a 4.5% difference in absolute manifold pressure, and flow isn't even linear with pressure... Which means you'd expect the aftermarket manifold to be making MAYBE 3% more power at that pressure - and the 99 was making 1.3% more, which means at MOST it's only doing a tinsy bit worse (11.4 hp if it were completely linear, which it isn't)....



It took a little work to get this to scale, but you can see, the only place the aftermarket did you any good at all was on the low end - sub 4500 rpm. Maybe I need to take a better look at it, but it doesn't seem from what you've shown you're really getting a LOT out of it. Maybe a bit, but not a lot.

For that matter, didn't you do this with VICS locked in one position? That would hurt it's low end, and you'd expect the big jump around 5k.
AbeFM is offline   Reply With Quote
Old 04-24-2010, 06:54 PM   #371
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,198
Total Cats: 2,584
Default

the more I look at those two graphs the more I'm not impressed with the sheet metal intake manifold. the increase is just not big enough IMHO. but that's just my uneducated *** lol, I'm probably wrong
18psi is offline   Reply With Quote
Old 04-24-2010, 07:07 PM   #372
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

I think there's bit of confusion here. On plot #125 ~ it is showing that with how my car sits NOW, it took 1.5# more boost to equal what I got from the Flipside manifold. I've made improvements to the car since I pulled the Flipside manifold off so it's not a fair comparison. Sort of like how many people say "I don't need that part, I'll just turn the boost up". If I put the Flipside manifold back on, I could put down even better numbers than I did last time. Which really bothers me because when I get the manifold back I'm going to sell it.

Here's the closest apples to apples comparison between a stock manifold and the Flipside manifold on my car. It's not back to back testing, but it's all I have.

Name:  manifolddynosheet2.jpg
Views: 2
Size:  52.1 KB
JayL is offline   Reply With Quote
Old 04-24-2010, 07:14 PM   #373
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,198
Total Cats: 2,584
Default

so with the mani you make less torque but more power?
18psi is offline   Reply With Quote
Old 04-28-2010, 02:52 PM   #374
Elite Member
iTrader: (3)
 
AbeFM's Avatar
 
Join Date: Aug 2006
Location: San Diego, CA
Posts: 3,048
Total Cats: 8
Default

Yeah the second plot, that's huge. The first one, I'm not impressed at all, as I mentioned, 1.5 psi is HUGE at... 2 psi. But at 20 psi, it's a very small percentage.

What improvements did you make since the flipside?? I'm really curious. When are you actuating VICS?
AbeFM is offline   Reply With Quote
Old 04-28-2010, 04:30 PM   #375
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

Quote:
Originally Posted by AbeFM View Post
What improvements did you make since the flipside?? I'm really curious. When are you actuating VICS?
I've changed from an open dump tube to recirculating, aftermarket exhaust cam with a different, but stock vvt cam and a few other small things. As for the VICS, it's locked in the open position.
JayL is offline   Reply With Quote
Old 05-10-2010, 10:18 AM   #376
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

After an alignment and adding FM front and rear sways I'm very happy with how the car feels. Running the front bar on full stiff and the rear on full soft seems to be working great with my suspension and driving style. Pushed it quite hard yesterday and it felt solid without excessive oversteer.
JayL is offline   Reply With Quote
Old 05-10-2010, 10:27 AM   #377
Elite Member
iTrader: (2)
 
Join Date: Jan 2007
Location: Los Angeles, CA
Posts: 8,782
Total Cats: 119
Default

Are you running MT back and RS3 front, 6UL 8" all the way around?
Faeflora is offline   Reply With Quote
Old 05-10-2010, 10:30 AM   #378
Elite Member
iTrader: (10)
 
leatherface24's Avatar
 
Join Date: Dec 2006
Location: Pembroke Pines
Posts: 4,033
Total Cats: 2
Default

What do you have your cam set to? I just got my FM cam gear in the mail
leatherface24 is offline   Reply With Quote
Old 05-10-2010, 10:41 AM   #379
Elite Member
Thread Starter
iTrader: (12)
 
Join Date: May 2007
Location: Austin, TX
Posts: 1,923
Total Cats: 0
Default

Quote:
Originally Posted by faeflora View Post
Are you running MT back and RS3 front, 6UL 8" all the way around?
Currently the MTs are mounted on 8" 6ULs but sitting on a shelf in the garage and the car is on RS2s all the way around on 8" 6ULs.

Quote:
Originally Posted by leatherface24 View Post
What do you have your cam set to? I just got my FM cam gear in the mail
For now I have it at at zero, but I'm not running a factory exhaust cam and when I do play with it I'll have the car on a dyno.

I've actually been trying to shed some power this year to make the car more drivable on street tires. I put a smaller wastegate spring in and now am running it at a max of 16# of boost and my timing is several degrees prior to mbt.
JayL is offline   Reply With Quote
Old 05-10-2010, 10:46 AM   #380
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,198
Total Cats: 2,584
Default

I'm very interested what your powerband looks like right now at only 16#.
When are you going to be dynoing? Please don't forget to post up a baseline of what the car is at right now (for us that plan to operate at that pressure level in the future) if you can
18psi is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
LucaCarMods's Boosted Dutch Miata Build! LucaCarMods Build Threads 11 02-14-2016 07:13 AM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Is my swirl pot design okay? FrankB Race Prep 10 10-02-2015 10:00 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Image resizer concealer404 Front Desk 3 09-29-2015 01:41 PM


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 08:47 PM.