MSefi.com read only forum (Jan.15,2018)

I want to use a throttle body from an 89 GM truck 350 motor but don't know what size injectors are in it. Where do I start? Anyone out there using this TBI or similar?

Hi zorb847,

Your injectors should be
injector engine flow lbs/hr throttle one GM
color code size at 13 psi bores part #
Green/White 5.0L 40 43mm 5235279

Thursday, June 24, 2004, 2:11:30 PM, you wrote:

z> I want to use a throttle body from an 89 GM truck 350 motor but
z> don't know what size injectors are in it. Where do I start? Anyone
z> out there using this TBI or similar?

Some info on GM TBIs and using them here
http://thegebharts.com/msindex.html

Later,
Colin
mailto:colin@thegebharts.com
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All,

Similar doubt here.
I've some injectors which I can't find any spec about them.

Could I measure them by myself? Someone could help?
If I apply 12V on the injectors during one minute and measure the amount of liquid (alcohol or gasoline) would it be realible?

Thank you,

Eric has some tips on how to flow test injectors at home, here:

http://www.not2fast.com/efi/injector_info.shtml

Also check this site as they have flow ratings for more than any other site i have seen... http://www.fuelinjector.citymaker.com/p ... 212139.htm

colinnwn wrote:Hi zorb847,

Your injectors should be
injector engine flow lbs/hr throttle one GM
color code size at 13 psi bores part #
Green/White 5.0L 40 43mm 5235279

Thursday, June 24, 2004, 2:11:30 PM, you wrote:

Looks like the eyes jumped a line in the Gebhart data, for a 350 he should have the #5235206 55lb injectors.

Or you could do this:

viewtopic.php?f=29&t=37841

Another option is to find a local injection cleaning shop and pick their brains while paying a fairly cheep rate for a flow check and inspection.

I just got done doing that with a set of injectors I got off of ebay, supposedly salvaged out of a Crown Vic.

Bugging a professional ended up getting me a few interesting insights into injector behavior under increased fuel pressure, as well as a few options on seals that I'd never seen in the after market, which will make my project easier.


Yes, I suspect I could have built a simple test bench for less than I paid him, but the side benefits made it worth it in my mind.

This is just my two cents, though.