Looking for a small turbo with a high pressure ratio - HomemadeTurbo - DIY Turbo Forum

Go Back  HomemadeTurbo - DIY Turbo Forum > Homemadeturbo > Forced Induction
Looking for a small turbo with a high pressure ratio >

Looking for a small turbo with a high pressure ratio

Forced Induction Custom FI Setup Questions

Looking for a small turbo with a high pressure ratio

Old 10-16-2018, 10:58 PM
  #1  
0.0 BAR
Thread Starter
 
Join Date: Oct 2018
Posts: 2
Default Looking for a small turbo with a high pressure ratio

I've been racing a turbocharged Honda CX500 at Bonneville the last couple years and I'm hitting the limits of my current setup. Its a 500cc engine running a K03-2075 (not ideal but works) on methanol and sometimes race gas. The bike has set a couple records but there is more in it with the right setup. I'm looking for a turbo that can put out a 4.0 pressure ratio at about 21lbs/m. right now the setup with the k03 is at 2.6PR at approx 15lbs/m, and intake air temps are horrendous. We are sitting at 140rwhp and want to get to 200.
It seems like every small turbo I have found just cant supply the pressure, does it exist? or is going compound the only way?
Thanks!
-Luke
Anderson Miller Racing
lucasanderson00 is offline  
Old 02-07-2019, 10:04 PM
  #2  
0.0 BAR
 
Join Date: Jan 2019
Posts: 9
Default

Sounds to me like you need a custom hybrid turbo of some sort. You need the small turbine as you’re only working with 500cc displacement, but you need a bigger compressor so it can push more air, as for your AIT, are you running an intercooler? Maybe you need a bigger one or a switch to water/air charge cooler to increase efficiency. Are you running the fuel injection throttle bodies setup from a GL650 or are you running carbs? Draw thru or blow thru?
Daveyg is offline  
Old 02-11-2019, 09:26 PM
  #3  
0.0 BAR
Thread Starter
 
Join Date: Oct 2018
Posts: 2
Default

Originally Posted by Daveyg View Post
Sounds to me like you need a custom hybrid turbo of some sort. You need the small turbine as you’re only working with 500cc displacement, but you need a bigger compressor so it can push more air, as for your AIT, are you running an intercooler? Maybe you need a bigger one or a switch to water/air charge cooler to increase efficiency. Are you running the fuel injection throttle bodies setup from a GL650 or are you running carbs? Draw thru or blow thru?
No intercooler, but this is methanol fueled so IAT isnt an issue, the intake even gets a little frosty after a long pull. This bike is running megasquirt fuel injection so no carbs to worry about. I agree that the turbine and the displacement of the engine are somewhat mismatched. The compressor side seems to be the real issue though. The turbo I have now is really running along the surge line on the map in real world operation, meaning the engine doesn't physically flow enough air at a given pressure to be ideal for the compressor. If I raise the pressure any higher the turbo will overspeed (according to the compressor map, I have no way of measuring turbo speed), so Im looking for a compressor that can really lay down the pressure at small flow volumes
lucasanderson00 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
saut
General Discussion
1
06-29-2013 08:42 PM
maddmatt02
Forced Induction
7
05-27-2009 11:18 PM
98ctr
Engine Management
40
08-11-2006 04:59 PM
crx2fast
General Discussion
0
11-18-2005 11:27 AM
Dark Realm Customs
Forced Induction
8
08-06-2003 09:23 PM


Thread Tools
Search this Thread
Quick Reply: Looking for a small turbo with a high pressure ratio


Contact Us Sitemap Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 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.