i have a 283 that is putting out about 250-300hp right now. i was thinking about putting a small blower on it like a weiand 177. Its a 2 bolt, i think it has a forged crank but i'm not sure, and shot peened rods(i don't know what that is exactly but thats what i was told by a guy who looked at them), and i think its got cast pistons but i'm not exactly sure also. it was rebuilt before i got it so i don't know exactly whats in it but lets say its mostly stock.

will it take a blower? also, how much more gas will it use?

 

Beware of cast pistons and blowers! If you get any kind of detonation, you can make a window in your piston. If you plan on going blown, typically it's a good idea to step up to forged pistons to be safe. However, if you can keep detonation from occurring then they might hold up. Moreover, that's a lot of blower for such a small motor. You could probably get by with a 142 unless you have plans to drop something bigger in. A lot will also depend on how much boost you plan to run. Keep it on the low side to be safe (like 5 psi maybe). Might be better for the bottom end too. good luck.

Ben

 

i have about 9.5:1 compression right now so i'm not going to be able to run much boost without going into the engine. and with less than 5psi, i don't know that it will be worth putting a blower on.

does a blower cause my gas milage to go down because this will be a daily driven car.

 

Of course! The new found power will cause "pedal to the metal" syndrome. If you can keep out of the throttle, then gas mileage will not be affected too much.

Any 283 will have a forged crank in it. I'm very certain that the factory never made a cast 283 crank.

Your compression and camshaft is more of a N/A selection and will not utilize the blower's potential.

 

From my personal experience (got a 142), your gas mileage will hurt some. Since we're talking about a Roots-type blower, the crank spins the rotors via the belt. This spinning does result in some parasitic loss when driving without boost. With boost obviously you are going to really burn through the gas. But you gotta pay if you wanna play! In all, don't expect fantastic gas mileage with the addition of a blower.
However, I've got a 142 on top of my 377 and it is a daily driver. While my gas mileage isn't great, it could be worse too. And that premium isn't gettin any cheaper ($2.30+! ). I'm still trying to get it nailed down, but that is tricky. Can't have it running lean or else I get detonation. Often it's better to run richer to play it safe. Hope that helps...some.


Ben