500 cid Caddy TBI?

[dyeager535]

Part number for a 1975 500 D1907, "COIL,DISTR PICK UP".

Unfortunately, it was only used up to 1990 according to AC Delco, and was used *only* on carbed applications. Same as all other V8's though, for example a 1986 K5 used it.

 

[ntsqd]

Guess I need to go brave the rain and pop the cap off my TBI dizzy. See what it's inerds look like.

 

[mikey_d05]

I might have a line on a guy that makes HEI to TBI conversion parts for the distributors, $25 for everything. I should know in a few days.

 

[mikey_d05]

Guy is a flake, but I know for a fact from the Caddy forums that you can take an HEI and turn it into a dizzy that the TBI ECM is capable of controlling. I have lots more research to do.

 

[cybrfire]

Guy is a flake, but I know for a fact from the Caddy forums that you can take an HEI and turn it into a dizzy that the TBI ECM is capable of controlling. I have lots more research to do.

Not too scared of the dizzy alterations.

Is there a color code for the 90 lbs./hr. injectors? Can't seem to find a bonified part number anywhere for them. GM couldn't tell me what the part number was!

Was also thinking about the motor homes. Would it be possible that they had a larger injector?

At any rate, I'm gona drop cash on the custom ground cam tomorrow so I'll get it to work somehow.

 

[dyeager535]

How about the "P" vans by any chance?

Checked my '88 parts manual, (R/V only) 17111784 is the "fuel injector kit" for the 7.4L engine, but according to gmpartsdirect.com it's no longer valid. As a reference. With only one injector for the big block (at least in light trucks) if factory 90lb/hrs exist, they must be from a non R/V app.

There were only 3 injector part numbers listed for '87-88, 305, 350, and 454. (4.3 listed but doesn't show part #)

 

[mikey_d05]

90 PPH
454/7.4 Liter Big Block Truck
Dark Red/Dark Blue
GM 5235231 *RPD

Haven't cross referenced it so I'm not 100% that that's correct.

 

[dyeager535]

Can't find that at GMPD.

217-340 is the AC Delco number for a 1990 Kodiak 427 TBI, but I can't find any specs on it.

 

[mikey_d05]

Looks like the new p/n is 17111784.

I couldn't get it with a direct search but if you browse the catalog you can find it under an '89 1-ton pickup.

It also appears that there was a second 90 pound injector used that's listed as a 17112249.

Turbo City lists both of these injectors as 75 lb injectors. I don't know exactly WTF the deal is. I'd hook up an air/fuel gauge and bump the pressure if they don't flow enough.

 

[cybrfire]

found this surfin around.

http://www.car-stuff.com/performance/quote.php?make=5&year=1988&model=45&brand=3122&part_name=2&skipped=true

Don't look quite right though.

 

[mikey_d05]

It's for an Eddy MPFI kit.

 

[cybrfire]

I think I'll just call Turbo city tomorrow. Maybe Bosch and accel as well.

 

[dyeager535]

I'd stay away from Accel. I've heard nothing but bad things about their injectors.