Went from one gay car to another. Now to make this one faster than the last. - Page 5 - 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 03-20-2012, 07:31 PM   #81
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

It's a plastic Bosch bov that was on the car when I bought it. I'm not sure of the part number of where it came from, but Bosch bov's in general, seem to be pretty good, although not entirely immune to failure.

Can you give me a link to the page that you found? My issue seems to be kind of unique in that I wasn't able to find anybody posting about the same symptoms. I'd love to figure out what the specific cause is.
573 is offline   Reply With Quote
Old 03-20-2012, 10:01 PM   #82
Elite Member
iTrader: (1)
 
Join Date: Dec 2010
Location: SoCal
Posts: 4,165
Total Cats: 19
Default

I just googled "Bov wont close" and got a lot of results from DSM sights or pages that said DSM in the heading.
http://www.dsmtuners.com/forums/newb...-blow-off.html

http://www.google.com/#sclient=psy-a...w=1280&bih=638

EDIT:

Here is a similar problem with a miata and a bosch BOV.

Here on snowmobiles.

You noticed right after you switched fuels right? In that second thread they had issues right after upping the boost. Maybe more power cause the problem.
gearhead_318 is offline   Reply With Quote
Old 03-20-2012, 10:39 PM   #83
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Thanks, I guess your search terms were better than mine. The issue did develop after switching fuels but I don't think that it's related. I haven't raised the boost yet because the injectors are holding me back.
573 is offline   Reply With Quote
Old 03-20-2012, 11:33 PM   #84
Elite Member
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,176
Total Cats: 261
Default

Go with the Injector Dynamics. EV14 injectors are the way to go. Sav runs them in the black car, and Emilio prefers them as well. They will idle like stock and still give you headroom for 400whp on E85.
Mobius is offline   Reply With Quote
Old 03-21-2012, 12:29 AM   #85
Elite Member
iTrader: (1)
 
Join Date: Dec 2010
Location: SoCal
Posts: 4,165
Total Cats: 19
Default

When you switched fuels, did you make more power?
gearhead_318 is offline   Reply With Quote
Old 03-21-2012, 11:18 AM   #86
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Quote:
Originally Posted by Mobius View Post
Go with the Injector Dynamics. EV14 injectors are the way to go. Sav runs them in the black car, and Emilio prefers them as well. They will idle like stock and still give you headroom for 400whp on E85.
Alright, then ID 1000's or 725's it is.

Quote:
Originally Posted by Shearhead_3:16 View Post
When you switched fuels, did you make more power?
My butt dyno says perhaps a little.






edit: ID1000's ordered. I figured some headroom...or a bunch of headroom would be nice since I don't like to replace things more than once.

Last edited by 573; 03-21-2012 at 01:22 PM.
573 is offline   Reply With Quote
Old 04-08-2012, 02:08 AM   #87
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

This weekend, I have:

-Replaced the speedometer cable. I broke the pin off of the old one.... :/
-Went to a fabricator to get a pipe made with a flange for my new bov.
-Installed bov and tapped a 1/4" fitting into the intake manifold. The problem that I was having is gone.
-Installed ID1000's.
-Started tuning fuel and upped the boost to 12lbs.
-Removed the AC thing from behind the dash.
-Removed the passenger seat rails and bolted the seat straight to the floor.
-Washed it.
-Enjoyed it.


Everything went well for the most part, and the car feels a decent bit quicker. Cold starts and idle have improved as well. There were some issues, though. The first is that the bov needs a stiffer spring--I have the stiffest one that Tial currently makes. I'll contact Tial on Monday and try to figure something out. The second problem is that the clutch has started slipping, and it really shouldn't be slipping. I powered through first and second, and when I went into third, the rpm's shot up and my nostrils were graced by that distinct stench of fail. The clutch is a Flyin' Miata level one clutch, and is pretty new(previous owner installed it). FM's site says that it's rated to 318ft/lbs. If I had to guess, I'd say that I'm about 100 or more shy of that. Any guesses as to why I might be burning that up?



Here, have some photos.






I may as well drop this here too.
573 is offline   Reply With Quote
Old 04-08-2012, 03:29 PM   #88
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,191
Total Cats: 260
Default

Hows tuning with them injectors?
Erat is offline   Reply With Quote
Old 04-08-2012, 05:00 PM   #89
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

It's really easy. I changed the reqfuel value and then scaled the ve table until the car started and idled nicely, but was slightly rich across the board. That took about 5 minutes. Now that I've made a few tweaks here and there, and spent a few hours driving around with autotune, the car is running very nicely. It idles and cruises more smoothly, and my cold start issue has largely gone away.
573 is offline   Reply With Quote
Old 04-08-2012, 07:06 PM   #90
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,191
Total Cats: 260
Default

Ahh. I went with 5o 750's and they are amazing, rough to start, and idles funny. I suppose just more tuning and working with it is in order.

Seen you again at woodward last night, er the car at least. Not sure if you saw me buzzing by / stalling in the lot or not, but i was there.
Erat is offline   Reply With Quote
Old 04-08-2012, 07:19 PM   #91
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

I saw a number of Miatas out last night. Which one was yours?
573 is offline   Reply With Quote
Old 04-08-2012, 07:30 PM   #92
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,191
Total Cats: 260
Default

Quote:
Originally Posted by 573 View Post
I saw a number of Miatas out last night. Which one was yours?
Red, no roll bar, garage vary lip, wide stance, turbo obviously.
Erat is offline   Reply With Quote
Old 04-08-2012, 08:31 PM   #93
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Okay, I remember seeing a Miata with a GV lip and I remember that it looked nice--all of the other details have slipped my mind. That was probably you then.
573 is offline   Reply With Quote
Old 04-08-2012, 08:36 PM   #94
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,191
Total Cats: 260
Default

I'm the only red miata that I know of that shows up on ww regularly. We'll have to shake hands sometime.
Erat is offline   Reply With Quote
Old 04-09-2012, 12:14 AM   #95
Elite Member
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,176
Total Cats: 261
Default

Quote:
Originally Posted by 573 View Post
There were some issues, though. The first is that the bov needs a stiffer spring--I have the stiffest one that Tial currently makes. I'll contact Tial on Monday and try to figure something out.
Doesn't Tial have helper springs? Or am I thinking of someone else ... I am wastegate-free.

Quote:
The second problem is that the clutch has started slipping, and it really shouldn't be slipping. I powered through first and second, and when I went into third, the rpm's shot up and my nostrils were graced by that distinct stench of fail. The clutch is a Flyin' Miata level one clutch, and is pretty new(previous owner installed it). FM's site says that it's rated to 318ft/lbs. If I had to guess, I'd say that I'm about 100 or more shy of that. Any guesses as to why I might be burning that up?
Was the flywheel resurfaced when the FM was put in?

Are there any whirrrr noises at all engaging the clutch? If so the full clutch face may not be engaging due to improper bolt torque. This will cause rapid asymmetrical wear to the point of clutch slippage in short order. Sadly I have personal experience with this one.
Mobius is offline   Reply With Quote
Old 04-09-2012, 02:14 AM   #96
Newb
 
Join Date: Feb 2012
Posts: 11
Total Cats: -9
Default

very nice car, makes me want a black na instead of a white one lol
Johnphamiliar is offline   Reply With Quote
Old 04-09-2012, 01:33 PM   #97
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Quote:
Originally Posted by Erat View Post
I'm the only red miata that I know of that shows up on ww regularly. We'll have to shake hands sometime.
Most definitely.

Quote:
Originally Posted by Mobius View Post
Doesn't Tial have helper springs? Or am I thinking of someone else ... I am wastegate-free.



Was the flywheel resurfaced when the FM was put in?

Are there any whirrrr noises at all engaging the clutch? If so the full clutch face may not be engaging due to improper bolt torque. This will cause rapid asymmetrical wear to the point of clutch slippage in short order. Sadly I have personal experience with this one.
Their wastegates have helper springs, their blowoff valves do not. I contacted Tial and they said that most people rectify this issue by using either an 1/8" or 1/4" shim. The valve is barely cracked open at idle so I'll try an 1/8" shim first and see if I need more.

I'm not sure what the status of the flywheel is. The previous owner was pretty meticulous with this car so I suspect that the flywheel was either resurfaced or replaced.

I haven't noticed any whirring noises during engagement, but I haven't been listening for that specifically either. I'll listen for that next time I drive. I have encountered a number of bolts on the car that weren't as tight as I would have made them, so it is possible that some of the relevant bolts may have been tightened to below spec. The clutch didn't slip at all yesterday, which is nice, but I'll still look into this more whenever I next have time and tools, and that may be a while.

Quote:
Originally Posted by Johnphamiliar View Post
very nice car, makes me want a black na instead of a white one lol
Thanks. Once you go black, you don't go back.
573 is offline   Reply With Quote
Old 05-03-2012, 01:20 AM   #98
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Race car or rice car? I don't care--I think it's cool. I hope to find a straight wiper arm at a junk yard and fit it with one of those nice, sleek, Bosch blades. My Miata will look just like a DTM car.



Other things that have been done or are currently being done are:
-shimmed bov(still needs more shim. at least it's closed at idle now)
-properly attached drivers side fender(the bottom wasn't attached when I bought the car. then I went fast and it bent outwards some)
-cut rear bumper (for super MPG's on my upcoming road trip. lulz)
-ironing out my startup enrichments(an unusually lethargic startup mildly embarrassed me in front of this girl that I like *blushes*)
-mostly stripping the interior(I'm masochistic like that)

Hood louvers will probably come soon, too. The single radiator fan struggles to keep the water temp down while I'm in slow traffic and I'd rather vent the hood than shove a slim fan in the vacant spot(the stock fan has a clearance issue).

Harnesses have been ordered(but are on backorder until next week). I also have a 2.5lb fire extinguisher that'll be going in. My bone stock dd caught on fire last year and I'm slightly paranoid now.

I had my last exam yesterday and I have an auto-x on Sunday and a road trip in two weeks. Basically I'm trying to make the car as fun as I can without spending a bunch because I'm feeling really god damn cheap right now. Hooray for austerity.

Pardon my excessive use of parentheses(maybe I'm doing it because I just had a calc exam????).
573 is offline   Reply With Quote
Old 05-03-2012, 09:42 AM   #99
573
Junior Member
Thread Starter
iTrader: (2)
 
573's Avatar
 
Join Date: Nov 2011
Location: Troy, Michigan
Posts: 252
Total Cats: 16
Default

Louvers: Which do you prefer, and why? I don't have a sacrificial spare hood so I'd like to get this right the first time.

http://www.genright.com/ProductInfo....ductid=LVR1006
I'd put them in the super low pressure regions that are forward of the hump. Since they'd be flanking the hump, I'd still have room for a big racecar-spec extraction vent in the center if I decided that I needed one later on.



There's also this three piece louver set that seems nice, although it could potentially end up looking like a clusterfuck. I'll make some cardboard templates to figure out if there's a good way to do this.

There's also this style of louver. fkn expensive for a set of louvers, though. Again, I'll have to make some cardboard templates.
http://www.hoodlouvers.com/products.html#productshood


More options might pop up later.
573 is offline   Reply With Quote
Old 05-03-2012, 09:51 AM   #100
Senior Member
iTrader: (3)
 
Join Date: May 2005
Location: Mass.
Posts: 816
Total Cats: 41
Default

Regarding your clutch woes, I'd check your slave cylinder.

A lot of 'bad' clutches in these cars are actually slave cylinders which have ---- the bed.

-Zach
thasac is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
91 1.6l turbo complete part out. Tony the Tiger Miata parts for sale/trade 63 12-29-2016 03:23 AM
Prepping my '95 for track asmasm Build Threads 82 05-26-2016 05:37 PM
Turbo 1995 Miata Low mileage Clean Tekel Cars for sale/trade 29 02-05-2016 05:16 PM
Twitchy car (tail happy problem) bigben Race Prep 16 09-11-2015 04:41 PM
Dsm t25 big16g or somethig else? karcher DIY Turbo Discussion 0 09-06-2015 06:02 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 01:12 PM.