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more 305 power

Educate me please, I thought the 305 and 350 had the same block? Why is the 350 so much better than a 305?
I was thinking about tuning my 305 since I'm also looking for good gas milage, since petrol is really expensive here in sweden.
Sorry if I'm hijacking..
 
Is there really that much of a gas mileage difference? It's only 45 CI.'s. Wouldn't think it would make much difference.
 
nad said:
Is there really that much of a gas mileage difference? It's only 45 CI.'s. Wouldn't think it would make much difference.

I don't know.. :dunno::dunno:

But a used 350 is about 1000$ here, and I can get quite a lot parts for that kind of $$$
 
sebban said:
Educate me please, I thought the 305 and 350 had the same block? Why is the 350 so much better than a 305?
I was thinking about tuning my 305 since I'm also looking for good gas milage, since petrol is really expensive here in sweden.
Sorry if I'm hijacking..

Not the same block, same style, but smaller cylinders, everything else is about the same, crank, rods, cam, bearings, gaskets, just smaller diameter pistons and cylinders.

You're really not going to get THAT much better fuel mileage withthe 305 over a 350, just alittle better power.
 
I think what the original poster meant...

was not that the insurance was expensive because it's a 305 and would go up with a 350 but that is costs him 2200$ a year to drive it besides fuel and repair bill...

I think the '86 is still a carb motor. I just did a desmog on my '84, not sure if you can do that or not but boy my 350 runs so much better! it actually has some cahones and feels like a V8 now, before it ran like a missing straight 6!

I snipped the AIR pump, plugged up a bunch of unused crap vacuum lines, put an open element air filter on, pulled the cat converter and replaced with 2.5 inch pipe. Runs so much better! Pulling the cat made the biggest difference. I'm putting new plugs, wires, cap, rotor and playing with the timing this week cause it has just a little bit of stumble when it shifts down to go. Even after I swapped 4.10s in it, it still felt way restricted like it was always trying to play catch up. Shifts much better through the gears since I desmogged it though.

I'm guessing your 305 has plenty of miles on it and is out of tune, if this is the case, you may benefit from the same thing. I basically did everything to my truck with stuff I had laying around, minus a few exhaust clamps. I'll probably end up putting $75 into it with the cap, rotor, plugs and wires though(which will swap to a 350 if you do ever swap em...).

Other then that, I'd put a dual plane 4 barrel aluminum aftermarktet intake and a 600 cfm holley or Ebrock, Exhaust stuff is always good too.
 

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