abcxyz91291

Well, for the first time in months, I got to drive my car today

Everything works amazingly. Shifts like a dream, got quite a bit of power, brakes are firm, steering is solid..

But, as always, it isn't perfect.


After the car gets driven for about 10 minutes, and has warmed up.. there's this kind of clicky popping sound, that sounds like it's coming from the driver's side header collector. It isn't a sound that repeats itself like a pattern, it's random.

sound like bugs getting zapped or something, it's weird.


another thing, is when the engine in revved up, and held at a steady rpm, it vibrates pretty badly.

basic specs of the engine:

. 1987 ford 302 (bored .60 over)
. 50/oz imbalance, 1-piece rear main seal
. new crank, made for stock 1987 block (not balanced for an overbore)
. stock style pistons and rods (cast, not forged)
. aluminum heads, intake
. ford racing full roller rocker arms
. hydraulic flat tappet cam / lifters

If you need more info just ask, but that's all I could think might help with knowing why it might vibrate..


and lastly, my engine seems to make quite a bit of rocker arm noise.

everything has been checked over and over.. the rocker arms are clearing everything, and have been set to a half turn, which is what ford racing recommended, so I just need any new ideas of why they could be noisy.

a few people mentioned pushrod length..



Just fyi, the car runs great. the engine is smooth, quick to start, and great all around, so I'm sure these noises and vibrations are minor, but still want all of this done right after so much time


Sorry for the long post, but any advice or suggestions would be greatly appreciated, now that I'm so close to the finish line!

Stepman

Check your plug wires. Spray them down with squirt bottle once engine is warm. Sounds like a bad wire.

urban_cowboy

Are both your harmonic balancer and flywheel 50oz balanced to match your rotating assembly?

abcxyz91291

Someone at a machine shop I asked suggested this, and I've yet to try

How would a bad wire make a problem like this?

abcxyz91291

Yes, I made sure of that

the only thing that made me skeptical is that when the harmonic balancer came, it said 28/oz on the packaging. when i called summit to ask why, they said that it's the right one, and that they call it 28/oz cause they add that weight to the flywheel weight, which adds up to 50/oz.


is this true?

The engine is running too smoothly for it to be the wrong damper though, it's only when it revs up that it gets bad

but who knows

urban_cowboy

That is bad information. Sounds like they sent you a 28oz because they ran the year of your car, not the year of the motor. 302s have different balanced depending on they year they were built. If you have a 50oz rotating assembly, you need 50oz flywheel and 50oz harmonic balancer. Besides, 28+28=56, not 50 .

abcxyz91291

Well, wouldn't I notice alot more shaking if there really was a 22/oz difference to what it should be?

http://store.summitracing.com/partde...0&autoview=sku

That's the damper I have. The year is correct, the imbalance is correct..

It's just the packaging that said 28/oz

but summit still seemed to be ok with that

at low rpm, the vibration is non-existent

but, I'm not knowledgeable enough to know if it really could be the damper or not

urban_cowboy

Not sure what to tell you. Web page says 50oz. Box says 28oz. Is the box mislabeled or did they send you the wrong part. All I know is if you put a 28oz on a 50oz crank, it will vibrate and get worse with more RPMS. I have done it. A balance mismatch will eventually tear up your motor, so you need to figure it out sooner than later.

abcxyz91291

If you think it could not vibrate at all with the wrong damper at idle, and then vibrate at higher rpm then i'll take a closer look at all of it, but that just seems unlikely to me

Could maybe something with the clutch have to do with that kind of vibration?

TexasAxMan

I think I'd remove the HD and take it to a machine shop. If it turns out to be 28 oz., Summit owes you an explanation at the very least.