Pat's Ebay Turbo Compound Boost Build - Page 34 - 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 03-03-2016, 01:35 AM   #661
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Pics of subframe crack. Other side was not nearly as bad, but it was cracked too. I fixed both sides.

It cracked on this part, which is where the LCA puts it in tension when you accelerate. Probably cracked from wheel hoping drag radials on a prepped track, and power.





Attached Thumbnails
Pat's Ebay Turbo Compound Boost Build-20160302_211454_zpsxlaxygaa.jpg   Pat's Ebay Turbo Compound Boost Build-20160302_211430_zpsvfvufgj3.jpg   Pat's Ebay Turbo Compound Boost Build-20160302_213444_zpszm7kvoxe.jpg  
patsmx5 is online now   Reply With Quote
Old 03-03-2016, 01:51 AM   #662
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 33,170
Total Cats: 1,990
Default

lol wow
18psi is offline   Reply With Quote
Old 03-03-2016, 04:15 AM   #663
Elite Member
iTrader: (2)
 
Mobius's Avatar
 
Join Date: May 2008
Location: Portland, Oregon
Posts: 2,782
Total Cats: 205
Default

Quote:
Originally Posted by 18psi View Post
lol wow
Umm, yeah, wow.
Mobius is offline   Reply With Quote
Old 03-03-2016, 10:59 AM   #664
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 5,812
Total Cats: 554
Default

I wonder if anyone from Hiroshima is following this thread. I think they would be both shocked and kind of proud.
hornetball is offline   Reply With Quote
Old 03-03-2016, 01:44 PM   #665
Senior Member
iTrader: (3)
 
Join Date: May 2010
Location: Iowa City
Posts: 528
Total Cats: 14
Default

DAAAAAAAAAMN!
vteckiller2000 is offline   Reply With Quote
Old 03-04-2016, 01:31 AM   #666
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Got the sound deadening in the tunnels/trunk floor back in. Fixed bleed hole in boost controller for rear turbo, few other little things. Car is crazy quiet now, quieter than stock by a lot. Quieter exhaust, quieter road noise. And no more stinky exhaust with the cat hooked up. Street car life so nice.

Still working on getting the boost up, made a few pulls earlier and got it to 28, then gave it two more turns but not sure what that is yet, will find out tomorrow. SHOULD be able to go a lot higher on the boost than before I think with the smaller bleed hole in the gate. If for some reason it still maxes out at 32, I'll be putting a lot more spring in the rear gate. But I expect to be able to get a lot more than 32 out of the rear gate now. Will find out tomorrow.
patsmx5 is online now   Reply With Quote
Old 03-04-2016, 12:24 PM   #667
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 5,812
Total Cats: 554
Default

I don't know what's worse for your drag competitors. Getting beat by a Miata, or getting beat by a car without appreciable exhaust noise. Cats!
hornetball is offline   Reply With Quote
Old 03-04-2016, 12:28 PM   #668
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 33,170
Total Cats: 1,990
Default

or getting beat by a Miata with ebay parts
18psi is offline   Reply With Quote
Old 03-04-2016, 01:37 PM   #669
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Quote:
Originally Posted by hornetball View Post
I don't know what's worse for your drag competitors. Getting beat by a Miata, or getting beat by a car without appreciable exhaust noise. Cats!
Last time I was there I beat 3 out of 4 drag cars. The first two both put them on the trailer and didn't race again! Both of them beat me out of the hole, and I FLEW by them on the big end.
patsmx5 is online now   Reply With Quote
Old 03-04-2016, 01:42 PM   #670
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Quote:
Originally Posted by 18psi View Post
or getting beat by a Miata with ebay parts
What's funny is pretty much every person that looks under the hood sees the tiny turbo and thinks that's it. Probably 98% of people I told it was a compound turbo setup didn't know there was another, bigger turbo on the car even after looking at the engine bay.
patsmx5 is online now   Reply With Quote
Old 03-04-2016, 03:17 PM   #671
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 5,812
Total Cats: 554
Default

Quote:
Originally Posted by patsmx5 View Post
What's funny is pretty much every person that looks under the hood sees the tiny turbo and thinks that's it.
So awesome. What a sleeper.
hornetball is offline   Reply With Quote
Old 03-04-2016, 09:50 PM   #672
Junior Member
 
Join Date: Jun 2008
Location: Senatobia, MS
Posts: 121
Total Cats: 6
Default

Miata, 500hp, reliable in the same sentence- That's cool.
fivehundredton is offline   Reply With Quote
Old 03-04-2016, 10:26 PM   #673
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Quote:
Originally Posted by fivehundredton View Post
Miata, 500hp, reliable in the same sentence- That's cool.
And one of the next steps is to make it pass emissions just like it sits.
patsmx5 is online now   Reply With Quote
Old 03-05-2016, 08:42 AM   #674
Junior Member
 
Join Date: Jun 2008
Location: Senatobia, MS
Posts: 121
Total Cats: 6
Default

You had any offers from FM, 949, etc?......Yet
fivehundredton is offline   Reply With Quote
Old 03-05-2016, 09:51 AM   #675
SadFab Sales Lady
iTrader: (5)
 
aidandj's Avatar
 
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,852
Total Cats: 937
Default

Quote:
Originally Posted by fivehundredton View Post
Miata, 500hp, reliable in the same sentence- That's cool.
It's been 2 weeks. Of drag passes. That's not reliable...yet
aidandj is offline   Reply With Quote
Old 03-05-2016, 10:11 AM   #676
Junior Member
 
Join Date: Sep 2013
Posts: 193
Total Cats: 10
Default

Quote:
Originally Posted by aidandj View Post
It's been 2 weeks. Of drag passes. That's not reliable...yet
lol...it blew a axle destroyed a subframe and wastegate of all things fell apart.
Very far from reliable. But here is alot of kinks to work out before any highly modified car is reliable.
Shortpersonbk is offline   Reply With Quote
Old 03-06-2016, 01:15 PM   #677
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

It has 650 or so miles on it so far. Here's what's failed/changed so far.

The rear turbo oiled on shutdown by my original design. I ended up chainging the drain and adding a time delay to the scavenger pump to fix that.

Rear wastegate fell apart (3 bolts vibrated loose due to bad assembly from factory). I reassembled it and made sure those fasteners will never come out again.

Axle broke racing on a prepped track. In their defense they've seen A LOT of hell before this compound setup was built. I race this car every weekend and those axles have been in the car for a WHILE....

Subframe cracked. It was cracked before the compound setup was built, I just recently fixed it. I'm sure hard launches and wheel hop did it in.

In summary, the rear turbo oiling was my ignorance, having never designed a rear mount turbo I did not setup the drain correctly. The wastegate failure was a cheap part problem, and the axle/subframe are failures from racing the car every weekend for years. If I drove it on the street on street tires and never raced it, those would never have broken, but what's the point of building a fast car and not enjoying it?

Considering I designed/fabbed probably 100 different things on this compound turbo setup, and I've only had one failure directly related to my design/fabrication skills after 650 street miles and tracking it twice, I'm happy with that. The fact that everything else is working as designed without problems is awesome, that means I got most of it right from the beginning.

Also added a shift light and some warning lights, will try to take pics of those next time I have the laptop hooked up to the car. Also going to order a MBC for the rear turbo to help it spool better, just realized I never put a MBC on the rear gate....
patsmx5 is online now   Reply With Quote
Old 03-06-2016, 08:44 PM   #678
Junior Member
 
Join Date: Jun 2008
Location: Senatobia, MS
Posts: 121
Total Cats: 6
Default

Quote:
Originally Posted by aidandj View Post
It's been 2 weeks. Of drag passes. That's not reliable...yet
Reliable 500hp Miata was the goal stated at the beginning of this thread. That's cool.
I've got confidence. Probably going to break some more **** before he gets it just right. Take Pat's car to the street as a DD/ fun car and I bet he's damn near there. Use it the toughest way possible like it's being used and it's already ******* amazing. And some things go from "breaking" to consumables.

Last edited by fivehundredton; 03-06-2016 at 09:10 PM.
fivehundredton is offline   Reply With Quote
Old 03-06-2016, 10:20 PM   #679
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Quote:
Originally Posted by fivehundredton View Post
Reliable 500hp Miata was the goal stated at the beginning of this thread. That's cool.
I've got confidence. Probably going to break some more **** before he gets it just right. Take Pat's car to the street as a DD/ fun car and I bet he's damn near there. Use it the toughest way possible like it's being used and it's already ******* amazing. And some things go from "breaking" to consumables.
Yeah it runs well, but I want it to be very reliable, not just fast. Reliable first, then fast. I'm working on making it pass emissions with the turbo setup right now.
patsmx5 is online now   Reply With Quote
Old 03-07-2016, 01:46 AM   #680
Elite Member
Thread Starter
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 7,967
Total Cats: 128
Default

Car now has a blow through miata MAF sensor between the intercooler and the throttle body. That sucked but it's done. Just tested and it works.

Gotta make a new EGR pipe still, and a fancy controller for fuel injectors to be controlled by stock ecu when not in boost.
patsmx5 is online now   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Garrett BB CHRA pressure differential from loose V-Band housing cause oil leak Landrew Engine Performance 13 02-15-2016 05:12 PM
Whipple Virtual Dyno Results patsmx5 Supercharger Discussion 68 02-08-2016 06:44 PM
Help with my noise rear 90 Turbo Suspension, Brakes, Drivetrain 5 01-14-2016 09:49 PM
Turbo Miata & ODB2 eurojulien DIY Turbo Discussion 10 01-13-2016 09:59 AM
Cost Effective Upgrades?? andyvo DIY Turbo Discussion 23 01-06-2016 08:27 AM


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 On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 02:53 AM.