TBI distributor just for fuel timing? - Moparts Forums

Register Log In Moparts Forums Moparts Question and Answer TBI distributor just for fuel timing?

Print Thread

TBI distributor just for fuel timing? #433436 08/10/09 12:36 AM 08/10/09 12:36 AM
Joined: Jul 2006 Posts: 609 a cornfield near you B BlakDak OP mopar
BlakDak OP mopar B Joined: Jul 2006 Posts: 609 a cornfield near you	I know on the magnums the dist is just for fuel timing, is this so on the TBI engines too?

Re: TBI distributor just for fuel timing? DELETED [Re: BlakDak] #433437 08/10/09 03:48 AM 08/10/09 03:48 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	Post deleted by 340SHORTY I am truckless..

Re: TBI distributor just for fuel timing? [Re: 340SHORTY] #433438 08/10/09 09:41 AM 08/10/09 09:41 AM
Joined: Jul 2006 Posts: 609 a cornfield near you B BlakDak OP mopar
BlakDak OP mopar B Joined: Jul 2006 Posts: 609 a cornfield near you	Bump for anyone else? As I thought the dist on the magnums also doubled as a cam sensor?

Re: TBI distributor just for fuel timing? [Re: BlakDak] #433439 08/10/09 10:29 AM 08/10/09 10:29 AM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	I can't think of another way (on tbi eng) the computer can find info to pulse the injectors, so it probably does both. Last edited by buildanother; 08/10/09 10:30 AM.

Re: TBI distributor just for fuel timing? [Re: buildanother] #433440 08/10/09 06:38 PM 08/10/09 06:38 PM
Joined: Jul 2006 Posts: 609 a cornfield near you B BlakDak OP mopar
BlakDak OP mopar B Joined: Jul 2006 Posts: 609 a cornfield near you	I can't find any info on it. So I suppose the dist on TBI works like a carbed engine, and is adjusted by the computer. Anyone know how to set base time on it then? As far as the fuel, I would assume if the dist has nothing to do with it, then there should be a pressure regulator that would up the pulse for more load?

Re: TBI distributor just for fuel timing? [Re: BlakDak] #433441 08/10/09 10:21 PM 08/10/09 10:21 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	There is a spec for base timing, on decal under hood. It is set with eng at running temperature and the 2 wire coolant sensor on intake man. disconnected. I believe the pressure reg is built in to throttle body.

Re: TBI distributor just for fuel timing? [Re: buildanother] #433442 08/10/09 10:39 PM 08/10/09 10:39 PM
Joined: Jul 2006 Posts: 609 a cornfield near you B BlakDak OP mopar
BlakDak OP mopar B Joined: Jul 2006 Posts: 609 a cornfield near you	this isn't in the original truck, its in a car now, so the stickers long gone. I guess I need to spend a few hours in the garage looking for my 90 shop manual!

Re: TBI distributor just for fuel timing? [Re: BlakDak] #433443 08/10/09 10:50 PM 08/10/09 10:50 PM
Joined: Aug 2005 Posts: 11,543 chicagoland,usa B buildanother I Live Here
buildanother I Live Here B Joined: Aug 2005 Posts: 11,543 chicagoland,usa	If you are using the sbec and the rest of the truck controls on that thing, I would set it at 10 btdc for baseline.

Re: TBI distributor just for fuel timing? [Re: BlakDak] #433444 08/11/09 07:54 AM 08/11/09 07:54 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: I can't find any info on it. So I suppose the dist on TBI works like a carbed engine, and is adjusted by the computer. Anyone know how to set base time on it then? As far as the fuel, I would assume if the dist has nothing to do with it, then there should be a pressure regulator that would up the pulse for more load? The magnums use a crank sensor for sequential fuel injector timing and use the distributor pickup for ignition timing. On the inside a EFI distributor works nothing like a carb distributor, but on the outside you twist it to adjust base timing the same way as a carb distributor. I would also suggest 10* BTDC as a good baseline to start from. On a TBI setup, the distributor typically has a pickup that tells the computer each time the rotor is at a certain point in its revolution. A TBI dist usually sends one pulse to the computer per revolution and the computer uses this information to help caculate spark advance(in addition to the base advance). Also a TBI computer will use this signal to time the TBI injector pulse. So the TBI injector will pulse at the same time in the engine's revolution, every time. This signal from the distributor is one of the inputs the computer uses to calculate injector pulsewidth. Fuel pressure does NOT increase on the fly to account for engine load.

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1