I just replaced the intake manifold, carburetor, fuel pump, water pump, alternator, and pulleys on my mustang, and I can feel the low end torque, but once i hit about 3500 rpms, i just lose all power and it doesn't pull any more..... Cylinder heads are on there way along with cams and hydraulic lifters...


What's the deal??

It's a 289 block and its almost 40 years old..... What new block should i look into??

302? or a 351?


Thanks...

 

'03 Cobra Engine

 

for power id say 351.

 

I want to stay away from fuel injected and blown.....




EDIt: I think i will go for the 351, maybe even stroke it

 

408? is that a 351 stroke? i cant remeber [:@]

 

No, Something isn't right with the engine. My stock engine pulls through 4500 RPM's. Check it out.

 

Yeah, you can make a 289 a very strong engine.

 

yeah. 289's run out of wind at 4500 RPM's. It's all because of the heads, and cam, valve springs. etc. If you have a new intake, heads, cam, That is a totally different engine. It should be more then enough for you.

 

Perhaps you should start with the little things before ripping the whole motor out.

Things like......

1. Check to make sure you are getting full throttle. Have someone sit in the car with the pedal on the floow and look down the venturies with the car off, if its a mechanical sec carb all 4 should be 100% open, if its a vacuum secondary....checking is a little trickier
2. You didn't mis-match your components did you? Like put a cam in that run 3k to 6k with a performer intake?
3. Have you rebuilt the carb? You might be junked up and not flwoing gas out the secondaries.

Usually when you run into a wall at 3k rpm...its a fuel issue. At least in my experience.

 

well said DodgeStang.