twins or single

coalblowin02

New member
Mar 27, 2010
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So my truck has a 480 over 366 40 over injectors and 40 over pump I feel like the 480 is hurting the performance is this possible do u think the truck will make more power with just the 366
 

Dirtymaxx03

Active member
Aug 4, 2009
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It will spool faster making the seat dyno feel like it has more power, for a little bit. That's about it.
 

Dozerboy

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Jun 23, 2009
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Search posts by coker6303 he has played around quite a bit with his 366/480. he ended up going with a 364 IIRC
 

coalblowin02

New member
Mar 27, 2010
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The 366 is a gated htt charger I no the question sounds like it makes no sense but I feel like the truck should be a heck of a lot faster. Fastest pass was 12.1 at 111 keep in mind it is 2wd and 60 foots aren't the greatest but my stock lb7 went mid 12s on tuning. What boost should I be seeing out of the twins thanks guys
 

coker6303

Keep Calm and Chive On!!
Aug 6, 2009
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I love my batmo 480 over 364.5 FMW setup. Much better daily driver than the cast 366 480 setup

On my tune that runs 11.8-11.9 I see 58psi peak, around 55-56 sustained. 12.3 tune sees about 50-53psi, this is my daily driver tune

I have a 1.10 480 to swap in, haven't done it yet but I bet that change is going to be icing on the cake!!! Spool up is important to me, lag is the devil.
 
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Utahski

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Oct 20, 2008
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Northern Utah
Unless something's wrong the 366 as a single won't be near as nice as twinned. I had the same thing....internally gated HTT366 with a 480 and that combination drove beautifully. Don't remember boost or exact times but it was in the 11's.
 

jacobdewey

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Jan 14, 2011
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I agree with everyone else, turbochargers are not your issue. Have you checked for boost leaks? Are you holding rail? There are so many variables to check first.
 

S Phinney

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Aug 15, 2008
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The 366 is a gated htt charger I no the question sounds like it makes no sense but I feel like the truck should be a heck of a lot faster. Fastest pass was 12.1 at 111 keep in mind it is 2wd and 60 foots aren't the greatest but my stock lb7 went mid 12s on tuning. What boost should I be seeing out of the twins thanks guys
It depends on the fueling but could see mid 70's for boost.
 

Dirtymaxx03

Active member
Aug 4, 2009
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I would make sure the gate on the high pressure turbo is functioning correctly and not blowing open when it should be shut, because if it is, you are trying to spool alot of turbo at once. If the gate is fine, look for boost leaks.