Would putting 24 lb injectors on a 305 help gas mileage or no??? and would it help at all horsepower wise????

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

Nope. They are like bigger jets in a car. They allow more top end flow. The computer will adjust accordingly. Now, if your other ones are dirty or not matched, new ones would DEF help!

 

Way too big,even for a modded 305. Stick with 19lb'ers and run the fuel pressure around 43-46psi.

 

Like said earlier, if your current ones are junk or are on their way out you could always put the 24lbs in , but you'll definatly need to reprogram the prom for the change or you'll be running VERY rich.

Brendan

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1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 SR Cam, Crane 1.6RR, EB TPI Base, 58mm TB, Stock T5, 30lb SVO, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here

 

What about 22LB ???? on a 305 TPI

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1987 IROC-Z
G92, LB9 305 TPI, 3.23, Bright Red with Carmine Interior, Pioneer DEHP47DH CD deck.2 JBL DS645 4*6 (F).. 2 JBL DS965 6*9 (S).. Soon to get new 305 TPI

 

Good question

I have a cammed 305 and a spare set of 22's but i've never seen my car scanned and dont know if i NEED 22's, or if they'd only fatten the car up.

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90% of the time the only reason to put larger injectors on a 305 TPI is if you're running a power adder. If you're not, the 19lbs and higher fuel pressure are just fine.

If you do put larger injectors in, you will need a custom chip, otherwise it WILL run too rich!


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
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