Scott C

Hi Folks,

I have a Holley 670 TBI from Howell EFI. I bought it several years ago and used it on my last modded 305 RS (ran very rich). Right now it's sitting on top of my brand new 350 (which will be installed tomorrow). I have some extensive mods and I really need to know what size my injectors are so I can either upgrade or leave them. I also need to know the sizes in order to get a properly programmed custom chip.

How can I tell which one's I have?

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'92 RS, ZZ4 10:1 350, Edelbrock 6085 heads, Crane 208/214 467/482 cam, GM 1.6 true roller rockers, Holley Projection TBI intake, Holley 670 TBI, SLP/Jet-Hot 1-5/8" headers, Catco 3" cat, Flowmaster 3" catback, Hughes 2500 stall converter, stock 700R4, Auburn Pro posi w/3.42, 17x9" SS rims w/BFG tires, Medium Quasar Blue w/white SS stripes, 48,000 miles....

FastBroker

Call Howell and ask them what you bought?

Scott C

Not that easy. I bought the unit from them at least 5 years ago and even then the box was marked as a different model than I actually have. To add to that, the guy I was dealing with at Howell has apearantly passed away.

There has to be a way to determine what size injectors are on a particular Holley TBI.

FastBroker

They gotta (the injectors) have part numbers on them somewhere, man. Get the P/N's and call Holley tech (800)225-0908.