09-26-2009, 12:56 PM
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#1
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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tuning for 454tbi
ok im still waiting on my new transmission, but i have my 454 tbi on and wired. i put the pod off my old tbi on it, so i still have 350 injectors at 24psi. im just curious whats going to need the most work. im shure my iac flow and start up will be the worst?
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92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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09-26-2009, 01:20 PM
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#2
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Registered User
Join Date: Jun 2003
Location: VA
Age: 47
Posts: 569
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Re: tuning for 454tbi
You'll need more TPS AE. When you open the throttle, you'll have more air moving and need more fuel.
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90 454SS 496 TBI  12.43 @ 106 mph
92 454SS Stock with WynJammer
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09-26-2009, 10:13 PM
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#3
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
yeah its a little rich on tps ae right now so im thinking that will be ok. and some minor VE tweaks. just was curious about the IAC flow and stuff
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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09-27-2009, 06:58 AM
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#4
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Registered User
Join Date: Jun 2003
Location: VA
Age: 47
Posts: 569
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Re: tuning for 454tbi
You would probably benefit more from a single plane if you don't have one yet.
I would guess the IAC changes woulnd't be so much; have never compared the IAC passages between the 454 TB vs others. I have considered porting the IAC opening on top of the TB for more airflow at WOT.
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90 454SS 496 TBI 12.43 @ 106 mph
92 454SS Stock with WynJammer
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09-27-2009, 10:16 AM
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#5
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
yeah i just dont feel like pulling the intake. i will probably put one on when i change cams
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-06-2009, 04:49 PM
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#6
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
after the trans gets broken in the 454 injectors are going in. do i need the injector offsets for the 454? if so what are they? anyone have a 454 bin?
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-06-2009, 05:07 PM
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#7
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
ANTY on mine. I'm working with the ANTZ cauz I couldn't find the #&*#&$ ANTY. Found the ANTZ in the Moates files..I think..Ya cauz the .xdf & .ads there are the ones that matched.
EDIT: found anty it was posted on 11/10..a far better bin to start with than antz, lots less tweaking to make it right.
__________________
89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60 
Last edited by xch3no2; 11-12-2009 at 12:51 PM.
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11-06-2009, 11:52 PM
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#8
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
what ecm do you have?
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-07-2009, 10:03 AM
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#9
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
7747-$42-anty
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89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60
Last edited by xch3no2; 11-12-2009 at 12:52 PM.
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11-07-2009, 10:07 AM
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#10
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Supporting Member
Join Date: Nov 2007
Location: TN
Posts: 678
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Re: tuning for 454tbi
whitelightnin92 I've got several $0E bins I can send you. I'm traveling right now, but will send them when I get home.
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1993 S10, 355ci.V8, Edelbrock MPFI, 2" TB, 6395 ECM, $0D Mask, Comp 280H Magnum cam, Edelbrock Performer RPM heads, Lincoln Mark VIII e-fan, 4L60E, 8.8 rear, 8.80s @ 79 MPH (1/8 mile), and cost to much.
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11-07-2009, 10:30 AM
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#11
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
ok thanks, i appreciate it
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-07-2009, 11:54 AM
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#12
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
If there is a better (more functional) mask for the 7747 I'd like to know. It's a dog ECM anyway, but good for learnin' this fun chit. 
__________________
89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60
Last edited by xch3no2; 11-09-2009 at 11:32 PM.
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11-08-2009, 05:00 PM
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#13
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
no matter what i do i end up running out of PW when under AE at high rpm. im nearly static from 4500-5200 and when you add AE on top of that its bad news. i really dont want 454 injectors but dont have the cash for an external regulator to raise my FP over 25psi.
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-09-2009, 11:29 PM
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#14
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
You could use a pencil grinder to lengthen the slot of the FPR, or boost spring pressure with a shim.
__________________
89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60
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11-10-2009, 02:55 PM
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#15
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
i have an adjustable regulator and a stiffer spring. its maxed out at 25 psi, and i need more.
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-10-2009, 11:48 PM
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#16
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
I have no idea where it comes from (55psi TBI?) but the stock FPR had a massive silver spring that I had to cut to get my pressure down to 18psi when I installed the JET FPR, and gained 2.5mm adjustment lengthening the slot. I would shim the spring to start till you find/build a spring with the right rate. I'm sure to end up with a VAFPR we will see.
__________________
89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60
Last edited by xch3no2; 11-10-2009 at 11:57 PM.
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11-11-2009, 09:18 AM
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#17
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
i cant get anymore because the spring bottoms out and it goes to max pressure, not good. i simply need a vafpr or bigger injectors. as of right now i have no $ but i have injectors so theyre most likely going in
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-11-2009, 09:29 AM
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#18
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Curt 1992 chevy 5.7l
Join Date: Aug 2006
Location: tennessee
Age: 24
Posts: 1,041
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Re: tuning for 454tbi
i hear ya there i run 80.5lb injectors at 40 psi was at 60 but ran into problems ack down to 40 and have tons of pw left..
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92 5.9l full roller,fully forged,scatt crank.AFR 190cc heads,Crane 2032cam,nv3500,S2 6 Puck clutch.Hurst Short Shifter,14-bolt,auburn 4.11.still TBI 
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11-11-2009, 10:32 AM
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#19
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Registered User
Join Date: Apr 2007
Location: delaware
Posts: 1,981
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Re: tuning for 454tbi
yeah im thinking my 90#s at 14-15 psi will be plenty. only thing that bothers me now it my warm restart it wants to load up with fuel. i have cut my cranking BPW in half and still nearly dies when i crank it. i cant inagine what it would do with the 90#s
__________________
92 k1500 TBI350, performabuilt 4L60E, 14bolt SF rear 3.73s, TBI mods, headers, duals,tunerpro $OD . 32/11.5 m/t, vortecs, COMP XE256 cam 16.024 @ 84 MPH 5500 lbs
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11-11-2009, 12:13 PM
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#20
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Don't try this at home
Join Date: Sep 2009
Location: Pacific NW
Posts: 498
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Re: tuning for 454tbi
Cranking AFR v CTS?
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89 K3500 RCLB (pirate SS) fat RAT..Scat/Eagle/Crower/Edelbrock/MSD..TBI/TH400/Dana 60
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