[-Joeyy-]

Hi i am new to these forums and need to find out a solution to a problem i am having. I have a 88 notchback with a 351 and i have a 750 proform carb and when i floor the car it like boggs out like its being flooded and then it will take off. I messed with the distributor a bit and it got better but it still feels like its not running like she should. maybe the carb floats are off? not sure. please any suggestions would be great

[TheBrat]

Are you still using the stock fuel pump?

Brett!

[-Joeyy-]

no i am using a holley

[TurboLX]

float might need to be adjusted

[5.8mustang]

ive got a 351 in mine but i use stock carb. a 750 seems big but it shouldent bog it down if you have a timing light id check it. if its not timing try adjusting the carb.

[-Joeyy-]

ok i will try it thx guys

[-Joeyy-]

by the way its far from a stock 351 its bored over to a 429 with every thing done to it aluminum heads forged pistons etc. so i doubt a 750 is to big for it.

[notched306]

check the accel pump on the carb also

[1slo5.0]

Originally Posted by -Joeyy- by the way its far from a stock 351 its bored over to a 429 with every thing done to it aluminum heads forged pistons etc. so i doubt a 750 is to big for it.

You can't bore a 351 to a 429. What is all done to this engine? "every thing done to it aluminum heads forged pistons etc" doesn't say much at all.

As far as your bogging problem goes, it could be a number of things. Most likely carburetor issues which could be anything from needing adjustment to a bad carburetor. The first thing I would check is the timing so you can rule that out. I'd suspect that 34 degrees at 3500 rpm would be a good starting point.

[-Joeyy-]

I am new to racing but i bought the motor for 400$ lol and it is a beast from what i can see it has aluminum heads aluminum roller rockers and forged pistons other then that i dont know and i read on this forum u can bore it to a 429 so i assumed it was bored to that but not sure... and the carb is brand new but the car ran out of gas and started doing it after that...

here is a vid of it so you can get a rough idea of what i have sorry the quality sucks lol

YouTube - Mustang Notchback Startup

YouTube - Mustang Notchback Startup

YouTube - Mustang Notchback 351 Worked

YouTube - Mustang Notchback 351 Worked

[thatdavidkid]

holy shit what are your motor mounts made of gumi bears? you can't bore a 351 to a 429 wherever you read that, READ IT AGAIN... you should probably find out what your engine is... i could say "well i bought this 5.0 h.o. short block but i bet it's a 347 since that's what you can take them up to"..... dont always assume... if you have a 429, you better run 9's once you have it tuned up... and do me a favor, fix that wiring cluster fuck... why would you put a motor in and just lay your wires wherever? take some pride in your work before you start looking for advice... can't even tie up your plug wires, how do we know you wired the fuel pump right?

[-Joeyy-]

take some pride are you a moron? the car is a project and those vids are from when we first put the motor in about a month ago... they were temporary and i assume it is that because listen to the thing a stock 351w does not sound like that...

[notched306]

a stock 351 block can only go to a 408.

[notched306]

Originally Posted by -Joeyy- take some pride are you a moron? the car is a project and those vids are from when we first put the motor in about a month ago... they were temporary and i assume it is that because listen to the thing a stock 351w does not sound like that...

put any cam in a motor,run open headers and turn the idel way down and you can make any motor sound like that.hell when i build my first motor it had a e303 cam and stock bore and sounded like that.

[-Joeyy-]

i got the exaust on now its alot quieter but the revs are still so mean. ill post a vid of it soon the way she is now.

[1slo5.0]

Originally Posted by -Joeyy- I am new to racing but i bought the motor for 400$ lol and it is a beast from what i can see it has aluminum heads aluminum roller rockers and forged pistons other then that i dont know and i read on this forum u can bore it to a 429 so i assumed it was bored to that but not sure... and the carb is brand new but the car ran out of gas and started doing it after that... here is a vid of it so you can get a rough idea of what i have sorry the quality sucks lol

You are assuming. Don't. Aluminum heads is a blanket statement that really means nothing. There are many different aluminum heads on the market and some flow worse than cast iron heads. For all you know someone could have painted the heads with aluminum colored paint and told you they were aluminum. Pull a valve cover and get the part number. Then you will know what heads you have. There is no way to know what cubic inch the engine is or what kind of crank, rods and pistons are in it without a visual inspection which isn't going to happen without tearing the engine apart. So if we are going to do any assuming it would be safe to assume that for $400 you bought yourself a stock 351W with a bigger than stock camshaft and a shiny intake manifold.

The carb being brand new doesn't mean something isn't wrong with it. When you buy a new carburetor it is not tuned for your car so it might not run correctly and will probably not be very responsive or make optimal horsepower. Do you have a fuel filter in the fuel system? A chunk of dirt could be stuck in a jet or one of the hundreds of passages inside the carb. I had one of those round punch out things from a peg hook hole stuck in one of my jet extensions. I have no idea how that got into my carburetor. The car did run good but when I found that problem and repaired it the car went from running 10.30s to 9.60s. Little things can make big problems.

[1slo5.0]

Originally Posted by notched306 a stock 351 block can only go to a 408.

Really? I wish someone would have told me that before I put together my 425 or the 418 I just finished for someone...

[1slo5.0]

Originally Posted by notched306 put any cam in a motor,run open headers and turn the idel way down and you can make any motor sound like that.hell when i build my first motor it had a e303 cam and stock bore and sounded like that.

+1

[-Joeyy-]

nah there deff aluminum heads what kind i have no idea i will run the number though... i know it has aluminum roller rockers and a vic JR intake and the motor was stupid idly sold for 400... some people around my town say they know the guy who got arrested and his wife sold the car with the motor and tranny in it and they said it ran 9's. but your right there is no way to fully know with out taking it apart. but from the feel of the car i can tell it has some serious power i mean it hauls ass it makes my friends 2jz twin turbo supra feel like a volvo running on 3 cylinders lol.

[94' Cobra 351]

Originally Posted by thatdavidkid holy shit what are your motor mounts made of gumi bears? you can't bore a 351 to a 429 wherever you read that, READ IT AGAIN... you should probably find out what your engine is... i could say "well i bought this 5.0 h.o. short block but i bet it's a 347 since that's what you can take them up to"..... dont always assume... if you have a 429, you better run 9's once you have it tuned up... and do me a favor, fix that wiring cluster fuck... why would you put a motor in and just lay your wires wherever? take some pride in your work before you start looking for advice... can't even tie up your plug wires, how do we know you wired the fuel pump right?

He is just looking for information, why do you have to be such a pompous jerk? Instead of trying to make him look stupid by saying, "you can't bore a 351 to 429 READ IT AGAIN" maybe you could have ACTUALLY been helpful and told him about stroking vs. boring.