Single Turbo Discussion Area for discussing single turbo RX-7's.

5000 Miles On Twin To4s

Old 08-29-2005, 09:26 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Jan 2003
Posts: 117
Default

like most of us i have been watching Bobby's twins come to life. congratulations to all associated w the project especially Dee.



i thought you might be interested to see my twins project. i designed and built it after seeing kevin wyum's twins in minneapolis,



it first fired during the summer of 03. lots of hurdles remained to clear.



i had initial turbo/vendor problems and worked them out by switching to kevin draper at Majestic/waco tx.



last summer i had engine builder problems (4) that set me back as to testing. i built my own motor this year w BDC ports and Jose LeDuc did my sideseals and gave me some valuable advice. the engine is no longer an issue as it has 5000 miles on it this summer.



almost all the miles logged.



i log exhaust back pressure, fuel pressure and 2 egts preturbo plus all the usual. based on my backpressure i have made two hotside changes and backpressure at one bar is 17 psi.



the turbos are TO4/t3 internally gated and they each make 41 lbs/min at 17 psi. my design objective is pump gas and 17 psi max. road racing is my game but daily driver with more than 500 rwhp is the concept. yes i know it hasn't been done at that boost but that's all w a single. i run two 3 inch downpipes for example, etc.



i have just a bit more tuning to do and will be on the dyno. i will be happy to share when i get the sheet. until then, no more info as there have been a bunch of twins that have disappeared after alot of talk and i won't be one of them... and of course neither is Bobby.i just thought you might be interested in knowing that there is a twin out there running strong.



the concept is a winner.





the view most see of my car...



can you find the second turbo?



howard coleman
howracer is offline  
Old 08-29-2005, 09:53 PM
  #2  
Senior Member
 
Join Date: Dec 2002
Location: fredneck MD
Posts: 4,107
Default

Looks good, I like the modified pettit intake



You have similar goals as me, the fact is twin turbos can flow enough air for 500+ on pump gas.



What ECU?
rfreeman27 is offline  
Old 08-29-2005, 10:00 PM
  #3  
Senior Member
 
Join Date: Dec 2002
Location: fredneck MD
Posts: 4,107
Default

and i like your plates, not being very subtle about it are you



I cant even open my hood around people without everybody freakign out



(couldnt edit)
rfreeman27 is offline  
Old 08-29-2005, 10:03 PM
  #4  
Senior Member
 
Join Date: Mar 2003
Posts: 410
Default

I'll be posting some pics of my 98% completed twin project too , I'm just waiting on my bud to bring over his camera.I went with a pair of garrett GT3071 with T3 hotsides , Pro Jay intake and a semi-peripheral ported motor.
DuMaurier 7 is offline  
Old 08-30-2005, 01:31 AM
  #5  
IGY
Senior Member
 
Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
Default

Howard,



I'm glad to see you are finally having some luck keeping things together.
IGY is offline  
Old 08-30-2005, 04:45 PM
  #6  
Senior Member
 
Join Date: Jun 2003
Location: Stacked outside you're trailer door
Posts: 1,430
Default

Thats pretty impressive. Good job so far and good luck for the future!
sweet7 is offline  
Old 08-30-2005, 05:19 PM
  #7  
Senior Member
 
Join Date: May 2003
Location: Auckland, New Zealand.
Posts: 707
Default

Oh man I'm loving these twin turbo set ups. I want one dammit!
KingFD is offline  
Old 12-28-2005, 07:37 PM
  #8  
Senior Member
 
Join Date: Jul 2001
Location: oHIo
Posts: 273
Default

Awesome, Howard. You've come a LONG way in the past few years...some of that is logged too!



Update when possible,



Tony K.
Badog is offline  
Old 12-28-2005, 07:50 PM
  #9  
Senior Member
 
Join Date: Dec 2001
Location: Charlotte, NC
Posts: 1,053
Default

how is the boost control with the internal wastegates?
RussellTT94 is offline  
Old 12-29-2005, 02:43 PM
  #10  
Member
 
Join Date: May 2003
Posts: 33
Default

Nice setup. Who made the exhaust manifold? Did you do it yourself? When do you expect the plots to come online.
skim41 is offline  

Thread Tools
Search this Thread
Quick Reply: 5000 Miles On Twin To4s


Contact Us - Archive - 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.