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Twin To4s Daily Driver W 82 Lbs/minute

Old 08-29-2005, 07:57 PM
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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
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Old 08-29-2005, 08:09 PM
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i seen that car up at elkart, nice job very nice job
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Old 08-29-2005, 08:54 PM
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this thread needs to be moved. pretty fd, and weird setup with the intercooler. i figured you would have a FMIC on this type of setup.

looks excellent!
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Old 08-30-2005, 12:50 PM
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where's your bov? also, i'd be very interested to see how you tapped the manifold for the two egts?
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Old 09-02-2005, 11:47 PM
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i heard that **** is SLOW
dramon killler is offline  
Old 10-07-2005, 12:24 AM
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get this **** outta teh test forum, howard check your PM's!
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Old 10-07-2005, 10:44 PM
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another awsome twin !
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Old 10-17-2005, 01:06 AM
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Old 10-20-2005, 11:56 PM
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Eric Happy Meal is offline  
Old 10-28-2005, 12:50 AM
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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.


skim41 is offline  
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