ANyone running the Holley Truck TBI unit???? Or Turbo Citys bored out TBI unit??? Thoughts on these..The Holley is 670 CFM, and the Turbo City is 590 CFM...I think stock is around 530 CFM, or so..Thanks

 

Im running a Holley tb but with a GM injector pod on top of it.Its the only way to go.From what I heard the Holley injectors suck.

 

thats what they say. thier are a million of threads on these. I have just gotten my hands on one and its not installed yet. so we'll see if thier is some rediculous nightmare with it when I do it.

 

Holley 670 has 50mm bores, turbocity's 590 cfm has 46mm bores and is a bored out 43mm TB.

A GM BBC TB has 50mm bores and should be close to the holley 670, can be bored out to 54mm to flow quite a bit over 700cfm, if remember correct.

Intake manifold bores should be = or > then the TB bores.

Here is a pic of turbocity's 46mm TB, works nice, should be good for around 340 fwhp.
https://www.thirdgen.org/forums/atta...e-dsc08258.jpg

 

The new Holley's are fine. They have been using Delphi injectors for some time. These work and can be ID'd by having the connectors come off the injector sideways (parallel to the ground).

The older Holley TBI units used the Chrysler injectors. Which can be ID'd by have a round black plastic cap for a connector. These injectors are worthless.

RBob.

 

Holley does not make their own injectors. The only manufacturers for injectors are Bosch, Seimans, Delphi, Denso, SMP (lucas), and something else that is slipping my mind.

I think the holly injectors are BOSCH. They may have switched. The old Accells were made by SMP and they switched to bosch.

As for the Delphi, Mercedes just had a big recall for them.

Just sayin....don't let labels dictate the price you pay or the quality you think y you're getting.

 

Yup thats exactly what mine have on them!