begi-s downpipe track aftermath - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to   Members

Prefabbed Turbo Kits A place to discuss prefabricated turbo kits on the market
Sponsored by:
Sponsored by:

LinkBack Thread Tools
Old 03-18-2010, 12:51 PM   #21
iTrader: (50)
gospeed81's Avatar
Join Date: Nov 2008
Location: Houston, TX
Posts: 7,357
Total Cats: 26

Corky, thanks for the offer, I'll let you know if I have to take you up on it. I'm buddies with the maintenance guys at work though, so fingers crossed.

Mine is mild, and I've had serious timing issues after a motor swap. I eventually put a stupid amount of retard on it to prevent some detonation, and had to make my own timing mark by finding TDC. Downpipe's been solid for a year otherwise.

Laughing at customer service comment.

gospeed81 is offline   Reply With Quote
Old 03-18-2010, 10:43 PM   #22
Former Vendor
Join Date: Dec 2007
Location: Texas Hill Country
Posts: 271
Total Cats: 16

Tim, Hell, why not?

Corky Bell is offline   Reply With Quote
Old 03-18-2010, 10:51 PM   #23
Former Vendor
Join Date: Dec 2007
Location: Texas Hill Country
Posts: 271
Total Cats: 16

Can't be sure of timing w/o octane and a few variables, but I am sure you are aware that too much retard will roast most anything.

Safety of engine and safety of turbo components kinda tug two different ways. Obviously more advance reduces margin on knock. My preference is to run as close to knock as possibe. "Close" to me means about two degrees on any given day's conditions.

Finding the balance is more fun than .... I'll think of something and let you know.

Corky Bell is offline   Reply With Quote
Old 03-18-2010, 11:38 PM   #24
Senior Member
Thread Starter
iTrader: (22)
Join Date: Oct 2007
Location: bay area, ca
Posts: 551
Total Cats: 19

We get 91 at the pump out here in CA and that map is based off of that. I pulled a little timing (1-2 degrees) around 4500 and 6500 rpm in 212kpa when I turned up the boost because I heard some knock so I know it's not too far off. The only caveat is that I'm now pretty sure the dp was already cracked when I did this which was affecting the tune. It consistently wants more fuel now across the entire table with the same AFR targets. The plan is to fix it this weekend.

At the track I tend to be a bit liberal with mixing 91 and 100 without changing the timing. In the future I won't use as much 100.

I think the major source of the cracks was my second to last track day where my turbo was hanging loose due to the studs and nuts failing.
orion4096 is offline   Reply With Quote

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
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Leaky Wilwoods mx592 Suspension, Brakes, Drivetrain 1 10-01-2015 01:45 AM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 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 02:04 PM.