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08-29-2009 05:47 PM #1
454 fiero
high this is my first post on here so i First thought I would introduce my self. Im percy, I just bought a pontiac fiero with a 454 mounted on a 71 eldorado tranny. the car has been done up really well the motor is a late 70's truck motor. It has been redone. has a .30 bore mild cam roller rocker kit. jackson peters drive gears hi flo oil pump. oval port heads an i belive it has a 750 holly 4 barrel carb. I dont know much about motors. but at first thought when I bought the car i thought that the motor would be scarry in the car. I thought that it would have tons of power an low end torque. but I would have to say i have been very disaponted in the motor. it is 100 % new an rebuilt. The owner said that it would need to be tuned said the valves an timming would have to be done.
Ok so I have got the timming so that there is no pingin or tinging sounds when I drive down the road with the car.It doesnt sound like there is any valve noise really coming from the heads. There is a stutter in the throttle when you step on it from a stop an try an get on it. it kinda gets doggy. it comes out of it but I can help but think that there should be alot more pull in the set up then what it has.
So my question is this. How would i adjust the carb on it is there a way to reduce the fuel going in to the motor. The car gets about 7 miles to the gallon. everyone says that it should be more like 12-15. So i think that the motor is getting to much fuel. If that was the case could that make the car run at a lot less or the motors over all potential. also could valves being off also create a lot of power loss. the motor should have I would think like 330 350 Hp an in the 400 range of torque which sould burn a tire at the very least. an I cant even burn a tire. If you have an ideas please help me out.
Good to have her home finally, still need to go back and give her another polish after messing with the engine stuff. Made it up to Idaho. Also a local show.
New guy from Utah.