I am thinking about purchasing a Holley 670 and using my stock Pod. What is the difference between the one for the 4.3..5.0...and the 5.7.

They are all 670 cfm so what one is the best. I have passed the 300 to 325 hp range and am looking to step up to a little more air flow.


Brian

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1989 Camaro RS

305 .030 over Hydro Pistons
Vortech heads milled to 58cc...Performer RPM intake....LT4 cam..Crane Gold rockers...FastChip custom chip...ALum. Driveshaft...3.73 gears with Posi...underdrive pullys...Rebuilt 700R4 with Vette Servo and B&M shift Kit...MSD ignition...A/C Delete No SMOG junk....1997 SS leather interior...B&M Shifter... Ultimate TBI mods...14X3 K&N open Element Non-Drop...Hooker headers....3" exhaust with Flowmaster Cross flow 16X8 Wheels from 97 RS Spohn LCA's Spohn Panhard Bar..LETS PLAY FORD!!

www.geocities.com/feltsb

 

the difference is in the injector rating. you could prolly achieve that kind of power with the 305 piece, but the 350 piece would take you further if you ever want more.

lata
tim

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91 Camaro RS-LO3,Auto.
14.209@95.46mph
Best 60' 1.917
Check Out The East Coast F-Body Nationals Home Page
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If you're using the stock pod, there's no difference.

-Mark W.
'88 SC Camaro w/ 305 TBI

 

The 5.7L Holley 670 unit comes with 65# injectors. That's plenty for that beast of a 305. Or you could just bolt on a GM 350 injector pod that has 55# injectors (better quality).

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, Jon (350 TBI!)
91 Red My website

 

FYI, do not worry about airflow from the stock tbi unit with that setup. I still have the stock unit with 55lb. cop injectors on mine after having trouble with the 670 Holley unit. 6300 in first and second without trying. 130 in forth having to letoff to slow for traffic.

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91 RS L31 350..... Vortec heads..... Holley 670..... Edel. intake .... Lt4 cam 1.6 rollers ..... Edel. TES headers .. 3" exhaust ..... 5spd 3.08

 

the new ones have GM injectors so if you want to use your stock pod or injectors that you already have in wait, get a used 670.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
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