Twin To4s Daily Driver W 82 Lbs/minute
08-29-2005, 07:57 PM
#1
Senior Member
Thread Starter
Join Date: Jan 2003
Posts: 117
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 in my twins project. it was first running during 03. i had initial turbo/vendor problems and worked them out by switching to kevin draper at Majestic/waco tx. last summer i had engine 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. based on my backpressure i have made two hotside changes and backpressure at one bar is 17 psi. egts re really cool also.
for the moment the turbos are to4/t3 internally gated and they each make 41 lbs/min at 17 psi. my design objective is unlike Bobby's... pump gas and 17 psi max.
i have just a bit more tuming 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
i thought you might be interested in my twins project. it was first running during 03. i had initial turbo/vendor problems and worked them out by switching to kevin draper at Majestic/waco tx. last summer i had engine 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. based on my backpressure i have made two hotside changes and backpressure at one bar is 17 psi. egts re really cool also.
for the moment the turbos are to4/t3 internally gated and they each make 41 lbs/min at 17 psi. my design objective is unlike Bobby's... pump gas and 17 psi max.
i have just a bit more tuming 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
10-20-2005, 11:56 PM
#9
Senior Member
Join Date: Jan 2003
Location: redondo beach
Posts: 983
10-28-2005, 12:50 AM
#10
Member
Join Date: May 2003
Posts: 33
Thats nice. So if Im correct you are running a T4 with a T3 manifold, actually 2 of them. Are you using 2 external wastegates? If yes do these have different spring pressures?
Would be nice if there would be more techn. info.
Keep up the nice work.
Regards
Rogier
Would be nice if there would be more techn. info.
Keep up the nice work.
Regards
Rogier
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