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any tips to tune tbi with supercharger

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Old Apr 20, 2008 | 11:23 PM
  #1  
blown91's Avatar
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From: Baton Rouge, LA
Car: 1991 chevy C1500
Engine: 355 W/t-trim
Transmission: full manual t-350
Axle/Gears: 3.90 posi
any tips to tune tbi with supercharger

Can anyone give me some advice on how to go about tuning EBL with vortech (about 12psi), vafpr, additinial injectors and driver/ecm (supplied by vortech), and water-meth injection. There are a lot ar varyables to deal with I know it can be done does anyone have any tips. Should I tune without supercharger and get right and then tune with supercharger, that was some advice that was givin to me but I feel that will make it harder and still have to retune entire table. Would it be easy to to tune by airfuel and make adjustment to ve of try to calculate ve then tune. Any thoughts

Thanks for your time and help, Blown91
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Old Apr 21, 2008 | 10:23 AM
  #2  
RBob's Avatar
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From: Chasing Electrons
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Re: any tips to tune tbi with supercharger

Go slow and stay out of boost. Get the regular 'driving around' tune roughed in first. That makes it easier to drive and so on. Then ease into some boost (couple of psi) and see how it is.

If the fuel pressure OK? Is the AFR OK? Any spark knock? Roughness (indicates too much SA)?

Once you can safely go into 4 - 5 psi of boost then evaluate the setup. Work in the extra injectors & alky setup. Keep the boost down and ease into it checking along the way. Do short bursts of boost and check again the AFR & SA.

Note that the EBL has the fuel multiplier table and the SA retard tables for when in boost.

RBob.
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Old May 8, 2008 | 09:26 AM
  #3  
liquidh8's Avatar
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From: Shippensburg, PA
Car: 1981 Buick Century Wagon
Engine: 87 GN engine
Transmission: 2004R
Axle/Gears: 3.73
Re: any tips to tune tbi with supercharger

Do you have some pics of your set-up? I know someone on here has a surburban that is blow through TBI. I have the additional injector plate and driver, was gonna use it with my EBl and 2 GN turbo's for blow thru. Keep us posted of you progress.
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Old May 11, 2008 | 01:56 PM
  #4  
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pfk
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Re: any tips to tune tbi with supercharger

Originally Posted by blown91
Can anyone give me some advice on how to go about tuning EBL with vortech (about 12psi), vafpr, additinial injectors and driver/ecm (supplied by vortech), and water-meth injection. There are a lot ar varyables to deal with I know it can be done does anyone have any tips. Should I tune without supercharger and get right and then tune with supercharger, that was some advice that was givin to me but I feel that will make it harder and still have to retune entire table. Would it be easy to to tune by airfuel and make adjustment to ve of try to calculate ve then tune. Any thoughts

Thanks for your time and help, Blown91

I got mine running pretty much the same way RBob said. If it wasn't for my 4l60E I think I'd be running the EBL, it seems to have the answers to all of the problems with tuning with boost.

I've started from scratch several times now and it has become very simple to rough in.The first run I do usually lasts a mile if that (stock is way too far off to drive) I make some quick adjustments to my airflow numbers (running MAF but it would be the equivalent of the VE table) The second run gets me drivable, and the third run gets me to the point where I can drive the truck safely into boost.

The tinkering after that is where it gets rough
----------
Originally Posted by liquidh8
Do you have some pics of your set-up? I know someone on here has a surburban that is blow through TBI. I have the additional injector plate and driver, was gonna use it with my EBl and 2 GN turbo's for blow thru. Keep us posted of you progress.
Did you get started on your turbo setup yet? I may be changing over to a Weiand but still haven't decided (trying to figure out if the problems I am having are due to having a blow through or not)

I have started dreaming about the next project and I will likely try twin turbo as well but I can't seem to find something to use for the bonnet, with twin inlets. (the thought of running 2TB's did come to mind however) Did you plan on manufacturing your own? or did you find one already?

Last edited by pfk; May 11, 2008 at 02:07 PM. Reason: Automerged Doublepost
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