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Chevy 305

This category covers questions about the Chevrolet small-block engine variant 305. The 305 had a displacement of 305 cubic inches, with a 3.7350-inch bore, and 3.4803-inch stroke.

1,733 Questions

What is the typical oil pressure of a 100000 mile motor in an l69 305 at idle and what oil should you use Thank you?

The oil pressure will depend on the condition of the engine. If you have 10 lbs at idle when engine is hot with this mileage, you are within specs. I would use 10W-30 oil. oil pressure of 10lbs and up is acceptable at hot idle. i like to use havoline 30wt oil. have never had a problem with it.

80-84 305 HO horsepower torque?

A Stock 305 Pushes Around 230hp/200 foot lbs torque @ 4900RPMs. But, I dynod my 1985 El Camino 305 HO with an Eldelbrok performer intake, dished pistons, with 58cc heads and 9:1 pistons at around 302hp.

Must be wrong. I have just researched the engine in my '55 Chevy Pickup and find it is a 1984 305 LG4 which is rated at 150 hp.

The 305 HO is rated at 190 hp.

You did not say what YEAR 305 you started with.

FYI - buyer beware - it was sold on EBay as having a 350 cu in in it.

What do you set the torque wrench on for the three times you torque it for a small block Chevy head?

It doesn't have to be exact, but you would start out at around 25-30 for the first pass, 45-50 for the second, and do the third pass at spec.

How good are vortec heads?

You won't find better iron, readily available Chevy heads. Had my set for years. Had 1.60 stainless Ferrara Ex valves put in, so I could run nos. 150. Put in beehive springs good for 550 lift. Done deal. 350/vortec/ air gap/650 DP/HOT Chevy hyd roller. maybe 425 hp.

And all the OLD Chevy stuff fits! Headers, water pump, power strng, distributors, Vortec heads and intake wil fit on any 350 Chevy. Best value for SBC of all time..

How can you tell if your motor is a 305 or a 350.1991 caprice classic?

Look at your timing scale the 305 times from behind the water pump & the 350 times in front of the water pump.

Does a 89 caprice have a v6 or v8 engine?

You need to count the plug wires. If there is 6 then it is a V6 engine.

If it has 8 then it is a V8

What are vortec heads?

the fastest way to tell is if the center intake bolts are not there.
the vortec heads that everyone wants for performance have no center intake bolts.

Will my 1997 305 vortec heads fit on 1995 350 block?

Yes they will fit, but it will also raise the compression on you 350 by .5-.8. Also the gasket thickness and pstion, etc. will determine compression, also the valves are smaller, 1.885/1.5 i believe.

How do fix a engine that continues to run after you shut it off?

It sounds like there is a problem with the ignition switch not allowing power to be cut off from you ignition source.

The idle speed could be set too high. Adjust the idle speed on the carburetor or throttle body, and then it should shut off just fine.

How can you put 22 inch rims on 98 Park Avenue with out them rubbing?

Anytime you modify a vehilce that is going to alter the oem specs, you are going to have problems. Outside of cutting radiuses into the fenders, or making a rigid suspension, there is really nothing you can do to remedy a 22 over 15" wheels. Even low profile tires won't help much.

you can put 22" rims on there with a 30 series tire 255/30/22 is what i have on mine you want to put spring spacer on the back or you cant use your back seat.

How much horse power comes in a Chevy caprice 350 engine?

can i put a 350 rocket that comes out of a 69 cuttless into my 1990 caprice

What causes a 1989 silverado 305 to surge during idle?

If you mean idle high by "surge" then that means you have a vacuum leak somewhere. Check all the rubber hoses in your engine compartment, and while your engine is running, spray wd-40 or some sort of cleaner around the hoses and fittings, because if it hits near the vacuum leak area, the motor will rev up higher for a little bit.

after that you just go to the parts store and buy the replacement hose.

I would change every hose in the pickup just to be safe.

What emission controls can you remove from a 1977 305 without negatively effecting engine performance?

legally-none

practically-all except the PVC valve.

i would hook timing up to constant vacuum. ste base timing about 10 degrees and gofrom there.

I'm sorry, but NEVER hook the vacuum advance to direct vacuum. Always use a ported source, (above the throttle blades) If you have the vacuum hooked to a direct source you build an instant bog into the car from a stop. I fix maybe 2/3 cars a week in my Emission Shop with this problem. Been doing it for 23 years. They'll usually run with high HC at the Smog check, too.

What is a stock 305 camshaft duration?

Need to know the year, They are all different. SORRY.