Did GM ever produce a V6 With a 1bbl Style TBI unit ? Hell, Did anyone every Produce a 6 or more Cylinder motor With a 1bbl TBI unit ?

or even a REALLy small / low CFM 2bbl unit.

I need a TBI injector that can fire with the frequency To feed a 6 up to around 5 grand, The TBI off the 4cyl is only good to around 3100 on a 6 before it cant fire any faster. ( rather, it cant actuate the injector pulse with enough speed to pulse once per intake stroke, 3 times per revolution.

Thanks For the info.



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Livin' the Stereotype

 

I'm somewhat curious as to how typical pulse width compares to intake stroke duration. It wouldn't seem feasible that you could even separate the pulses. Maybe you could use a static nozzle and a variable speed fuel pump ;-)

 

Well the Crossfire injection TBI (TB400) found on Thirdgen, feeds four cylinders each.
They have two single barrels sitting diagonal from each other.

Well I need to go out there in look in the intake, but there is diffently a left and right one.


You might can dig up some data on the GM's Thottle Body-400, and see if it will pulse fast enough for you.

Ron

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'82 Trans Am
'81 Camaro Z-28
'94 Vette LT1 Coupe

 

Can anyone Give me a Pusel frequency On the CFi injection?

My suspicion is the Injector is similar to the 1bbl TBI used on th Tech 4, wich Proved to be Too Slow

What is the effective redline On the CFi system ?

Will need to be somewhere in the range of, Hmm, 8grand To turn 6grand on a 6cyl.

More like 8.5

But I appriciate the info, Keep It coming



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Livin' the Stereotype

 

Bort,

I think your search for the Holy Grail of TBI injectors may go unfullfilled. The TBI300 (single injector) systems were not used on V-6s that I'm aware of. I'm not that fluent in TBI400s, so I can't comment.

If you get really stuck, I've got a spare MPFI system from a 2.8 that you could have if you pay shipping, complete with ECM and harness if you need it. It's from a Fiero, so the wiring harness might be a little short for a ThirdGen. Then again, copper and Sta-Kons are cheap...

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Later,
Vader
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"I cannot take this any more... Saying everything I've said before..."
Adobe Acrobat Reader 4.0

 

Hmm, Well Vader, I hate to tell you this, but this EFI idea is for a F*rd, 200ci Strait 6.

Looking For a way to develop a Bolt on TBI For it, WE have the capability to write our own ECM, just need a Damn Injector that will Pulse fast enough!

We are limited to a 1bbl TBI because the falcon 6 has an integral Intake manifold cast onto the head, It has very restrictive flow capabilities. Milling an adapter to bolt one 1bbl to another is simple, Using a 2bbl TBI however leads to machingin of the log, and ultimately WAY to much CFM for the motor.

But thanks For the Offer of the MPI, If Machineing Bungs for the Injectors in the cast Iron intake log were Not such a task, THis would most LIkely Be the route we took. However, we are attempting To Make a Bolt On style Upgrade that Could possibly become a marketable product.

Also, When I say We, I Really Dont have much to Do with it, Just trying to Help a friend get some info


But thats enough F*rd stuff for here...



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Livin' the Stereotype

 

Bort,

Damn! I can't even GIVE that freakin' thing away - not even to a FORD owner!? SHEE-OT!

Anyway, if you have a low-flowing 200 inch inline (had one in a Fairmont - same engine, twenty years later), and a single bore, restrictive intake that looks like it was engineered in the bargain-plubming aisle at Home Depot, and you can write your own PROM for the ECM. After all that, you can't get an injector with a low enough propagation delay to deliver adequate fuel with three pulses per rev.

Well, since the engine won't have an electronic distributor, you have a couple of options. You can install an pulse generator with four poles instead of six, so the ECM thinks the engine has four holes, or you can build a digital signal conditioner to clip ignition signals from the distributor to the ECM by 1/3. The former would create one complex ***** of a distributor but use a standard ECM. The latter would involve a few bucks of CMOS components and several experimentation hours, but would allow a regular six-cylinder distributor.

OR - you could help me clear the crap out of my garage, use the two short fuel rails and regulator from the 2.8L V-6, add some of your own tubing, and build a port injection system into the Ford/Home Depot manifold. Like I said, the MPFI ECM goes with it, and it's a SD system, so no MAF is needed. Knock the injector pod off the TBI300 throttle body, use the existing TPS and IAC on it, and have a MPFI 200-inch Ford six.

Just a thought.

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Later,
Vader
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"I cannot take this any more... Saying everything I've said before..."
Adobe Acrobat Reader 4.0

 

Just out of Curiostiy, How Much is shipping to me from You ?

In reply to What You stated, That idea about the Distributor is what we are working with Currently, And is posing some problems

But Thanks For the ideas, Hell after all thats the only way this **** gets done



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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Livin' the Stereotype