1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85) - Miata Turbo Forum - Boost cars, acquire cats.

Go Back  Miata Turbo Forum - Boost cars, acquire cats. > General Discussion > Media > Dynos and timesheets
Reload this Page >

1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85)

1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85)

Old 09-14-2015, 04:52 PM
  #1  
Supporting Vendor
Thread Starter
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 509
Total Cats: 52
Default 1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85)

This weekend I had an appointment at the dyno facility Brian Goodwin has been using for many years. It's a privately owned Dyno Dynamics tucked away in San Diego 65ft above sea level. Conditions over the weekend were not the best with air temps at 80* and ~65% humidity.

Set up details:

"V-mount" C30-74 Rotrex
85mm Pulley = 9.7psi peak
Junkyard BP4W with 3 seasons on it.
BP5A Intake Cam
ID1000cc
Walbro 255
E85
Racing Beat Header
Racing Beat High Flow Cat
Racing Beat Exhaust



First run on off the street showed 220WHP at 9PSI, not bad!



After getting the fuel curve dialed in and I started to play with timing, it didn't take much to hit my power cap. Last run of the day put down 235WHP and 190WTQ at 9.7psi peak. The car would have made more power, but given it's age (3 seasons on a junkyard block) and the fact it is completely stock I stopped here.



Dyno operated said this reads about ~10% lower than a DynoJet, either way I'm happy with the 235whp...the car has some serious get up and go now.
Attached Thumbnails 1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85)-16887329798_9cb6d0239f_b.jpg  
Lincoln Logs is offline  
Old 09-14-2015, 05:01 PM
  #2  
VladiTuned
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 35,080
Total Cats: 3,115
Default

Forgot to say congrats in the other thread.
...so congrats
18psi is offline  
Old 09-14-2015, 05:06 PM
  #3  
Supporting Vendor
Thread Starter
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 509
Total Cats: 52
Default

Originally Posted by 18psi View Post
Forgot to say congrats in the other thread.
...so congrats
Thank you sir! I am very happy with this torqueless wonder. :-)
Lincoln Logs is offline  
Old 09-14-2015, 05:57 PM
  #4  
Elite Member
iTrader: (3)
 
concealer404's Avatar
 
Join Date: Aug 2011
Posts: 9,806
Total Cats: 1,370
Default

Awesome! Digging the "V" mount.
concealer404 is offline  
Old 09-23-2015, 01:26 PM
  #5  
Supporting Vendor
Thread Starter
iTrader: (1)
 
Join Date: May 2010
Location: San Diego
Posts: 509
Total Cats: 52
Default

Originally Posted by concealer404 View Post
Awesome! Digging the "V" mount.

Thanks! It is nice knowing I don't have that sitting in front of the radiator along with all my other heat exchangers. The struggle is real with a Rotrex.

On another note, I'm convinced the dyno I used pretty much matches a dynojet exactly as it sits now. There have been a few ND dyno sheets popping up (using a Dyno Jet) laying down the same numbers as our ND did on the Dyno Dynamics.
Lincoln Logs is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Quinn
Cars for sale/trade
6
10-23-2016 08:58 AM
JxPhan
Meet and Greet
3
10-02-2015 03:17 AM
JesseTheNoob
DIY Turbo Discussion
15
09-30-2015 03:44 PM
MiataGarage
Engine Performance
5
09-30-2015 12:04 AM
itsMikey
MSPNP
3
09-28-2015 07:40 AM


Thread Tools
Search this Thread
Quick Reply: 1.8, C30-74 Rotrex, 9psi, 235WHP/190WTQ (E85)


Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.