Turbo T-66 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 21 (permalink) Old 09-17-2007, 04:53 PM Thread Starter
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Turbo T-66

Need some advise on drive pressures and turbo? I have a 2005 Ford PS 4x4 CC it has 250cc injectors,Spearco,4.30 gears, ported heads, head studs, ITP fuel system. I am currently running a TN T-66 with a .68 exhaust housing, Drive pressure at WOT is 58psi and boost is 38psi this turbo doesn't light until about 2400 RPM it seem to be about a one to one drive pressure at light throttle. EGT's are high at Hwy speeds 950 to 1050 if you get into the pedal it's 1600 in an instant. If I use nitrous it run's really well. So any Idea's for a turbo should I go bigger in the compressor side or smaller in the exhaust side are will twins fix my problems? Looking to see if I can make it more streetable and be able to tow a 5000lbs boat?

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post #2 of 21 (permalink) Old 09-17-2007, 06:09 PM
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Re: Turbo T-66

Sounds like you need to check your tunes, or swap injectors......


Here is something similar before the LPOP let go....

LINK



Adding a second turbo will fix the drivability issues at low speeds, and improve the top end pull it has now.


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We actually work on Ford diesel trucks, not just whore out parts we've never installed. Something to think about....

Anyone want a TN BB drop in with a 1.15 A/R?
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post #3 of 21 (permalink) Old 09-17-2007, 10:12 PM
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Re: Turbo T-66

were can you get the lpop gears from
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post #4 of 21 (permalink) Old 09-17-2007, 10:13 PM Thread Starter
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Re: Turbo T-66

I have only got to try this turbo is there nothing else to do? What about a smaller or bigger turbo maybe a GT-K? I am waiting for twins from you just want to know if this will solve my problems?
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post #5 of 21 (permalink) Old 09-19-2007, 06:04 AM Thread Starter
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Re: Turbo T-66

Anyone have some Idea's?
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post #6 of 21 (permalink) Old 09-19-2007, 06:09 AM
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Re: Turbo T-66

it sounds more like what brian said based off his link... check the injs/tunes
try upgrading it to a t70 and see what it does, maybe bigger ex housing?

2002 F250
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post #7 of 21 (permalink) Old 09-20-2007, 05:24 PM Thread Starter
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Re: Turbo T-66

Who do you recommend for a good tune? I am totally willing to try a different turbo if someone would be willing to send one.
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post #8 of 21 (permalink) Old 09-24-2007, 10:34 PM
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Re: Turbo T-66

we are having the same problem with ours and are trying afew things to correct it before we change to a smaller turbo or going to twins (we are running Elites stage V though) . what is your stall on ur converter? who is it tuned by? whos injectors are u running? is it a stock cam?
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post #9 of 21 (permalink) Old 09-24-2007, 11:02 PM Thread Starter
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Re: Turbo T-66

Quote:
Originally Posted by Logan21SV View Post
we are having the same problem with ours and are trying afew things to correct it before we change to a smaller turbo or going to twins (we are running Elites stage V though) . what is your stall on ur converter? who is it tuned by? whos injectors are u running? is it a stock cam?
The converter is stock 1800, for tunes John Wood & Innovative diesel, Injectors Casserly's 250cc, stock cam. I do have ported heads and ITP fuel system.
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post #10 of 21 (permalink) Old 09-24-2007, 11:24 PM
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Re: Turbo T-66

I would say a smaller exhaust housing to make it spool at the lower Rpms??? or am I way off base here?

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