671 blower HELP!!!
 

my blown 355 is making allot dark blue smoke, I am running blower prepped 750 edelbrocks with 9 psi, the engine is fresh, bowtie ported heads, forged flat top pistons, 9.1 compression, I checked the plugs and they are clean, looks as if the engine is running too lean, oil is clean, antifreeze is clean, anybody have any ideas???, I have not run the engine hard, I am affraid of the smoke!!

Smoke
 

Black smoke would indicate too rich of a fuel mixture. Blue smoke indicates oil burning.

its the front seals in the blower, there bad and the smoke is whatever oil is in the front of the blower leaking into the engine. Is it a gmc blower?

who has advised running 9psi fuel pressure ?..its a wonder the seats in the carbs are not blowing out.

It is a weiand 671 blower

it is a weiand 671 blower, and it seems as if it is leaking from the bottom of the front plate

How old is the blower?

It was suppoesed to have been rebuilt, now I am begening to wonder, how would one tell?

Nine lbs back it off to 6

If one is not carefull when replacing the gaskets on the blowers they will crimp. Loosen cover just enough to take a look. This will be a messy process, set the blower up so you can let the gear lube drain over night, clean up the area around the gasket seal really good, reinstall the gasket with a smig of rtv and slightly snug, but don't tighten. wait 24 hours and torque to spec's

lol, theres not much to replace in a blower. 4 bearings, 4 seals, some gaskets and aerobic sealer. AS long as the blower does not appear to be self destructing inside the clearances are probably close if someone had it apart. They are pretty simple. so is this a old detroit blower with weiand endplates? Can you upload a pic?
If the engine started smoking blue and the the enginge has no problems, its the seals. Seals can also be damaged when some one slides them on in a rebuild. If you bought it on ebay, i see plenty of people take a stock wore out blower apart, put it right back together and say its rebuilt. A wore out blower is still a good start .I guess if its leaking out the front cover, it would be hard for you to monitor the oil level in the blower. Is this a street car?

I am thinking it is an old detroit blower with weiand end plates, it is a street setup that will see a little strip action, it started smoking a little, and now it seems it is getting worse, no problems with the engine, it runs great, I used a siphon pump and siphoned most of the gear oil out last night so i can take the front cover off, also this front plate did not have any type of breather on it, what should I look for, if you give me a email address I can email a pic of the blower.

[email protected]

i sent you a pm.

I am sending you some pix, I hope they go thru, my email provider is a POS

You don't need a pressure relief in the front cover.

In fact, the worst thing you can do on a street blower IS have one.

Every time the blower goes into boost, if that case isn't pressurized, it is once the boost hits it.

When it gets pressurized, some fuel goes into the gear case. If you have a pressure release on the front, you release the pressure, and next time more fuel goes in when it hits boost again.

Rinse and repeat a few hundred cycles, and you've now contaminated your gear lube with fuel.

I tell anyone with a street blower to keep their hands off that pressure relief. They're hurting more than helping by continually removing pressure, unless they are frequently changing the gear lube out.

So, either leave it without a pressure relief, or put one in it and keep your hands off it.

HEY BUDDY THANKS FOR ALL YOUR HELP, GOT THE CAR RUNNING "NO MORE SMOKE!!!!!!" :D