Hey everyone, so here's the deal: I have a 305 bored .40 ( new flat top pistions k&B) with 416 heads polished on the exhaust side, a torquer intake, a comp cam cl12-364-4 cam and lifter set, and a 600 holley (4150). The engine seems to be strong, but it won't pull. I just got beat by a stock mustang. It was like I was driving a V6 car. I had someone check the timing and the carb (he races chevy engines) and evidently it was fine, but yet it preforms like a V6...Everything I mentioned about it is new parts, the only thing that was used was the intake. I am confused as to why it won't preform. It won't even spin the tired from a stop...it has a hesitation too. Its extremely frustrating. Maybe its the carb? Maybe the cam needs degreed? I don't know what to think anymore....

On a side note, I just had the transmission rebuilt.

A side from its lack of power the engine runs fine around town, no skipping, sputter, etc. I did notice the other day when I shut off it made a hollow bubbling noise in the exhaust?...kinda like someone put a flame out. It didn't pop or made a loud noise...it was kinda muffled.

 

Need we say more... too bad you spent all that money on machine work, which is now a sunk cost.

Ummm,,,,,,,, ...... ,,,,,, ... yeah........

List # 1850? Not exactly the cream of the crop....

208° on the intake. OK probably for a low-end torque type of setup, but not suitable equipment for competition.

Basically, it's just not enough motor. Prolly not bad for just driving around, prolly has good pep and pickup from a stop, for a 305... but in this day and time, good for a 305 isn't going to cut it.

Your gears probably aren't doing you any favors either.

I notice you didn't mention the exhaust at all. That tends to be a major bottleneck.

 

FlowTech headers 2.5 inch collectors, with 2.5 in pipe all the way back...and I have a flowmaster 80 series muffler. The Mustang was a mid 90's model. I would think I could keep up with something with that kind of power, considering my car isn't stock, but I don't know. the carb is a 4160...not the 4150...The performance is extremely disappointing...