First Start up Almost !!

[cliffords]

Well thanks to Craig who gave up his morning to help, we can get the car to fire ( now the distributor is 180 degrees back to where it should be) but we think we may have a fueling problem now.

So it is a 350 sbc and we need to keep it going as we need to break the cam in.

The symptoms are fires up now first time ish, runs up to 1k revs and dies from what feels like fuel starvation. When looking down the carb it appears there is far too much fuel getting in, almost like we are drowning the spark.

Thinking of new engine , lots of cranking and possible bore wash we have stopped for today.
The carb before I forget is out of box Holley,199R-9934-3
I think it is a 750 or maybe 650 vacuum secondary.

Mechanical fuel pump with no pressure regulator ??

So. Does anyone have any thoughts on the symptoms and secondly I have considered Holley expert cam break in on dyno if anyone knows of a reputable source.

Thanks

[Alex Miller]

I don't recgonise that carb number, is that the LIST number from the front of the choke horn?

Holley carbs are usually set up so that they wil start an engine out of the box, but you should check the idle speed setting and mixture adjustment, and the float levels in the fuel bowls.

The idle screw should be set so it is just starts to move the throttle arm, and then screwed in an extra three quarters of a turn.
The idle mixture screws should be turned out about 1 and a half turns from the fully seated position. These settings won't be perfect but they should get it started.

You could also check the accelerator pump, and make sure it is operating. Providing that this works you should have enough fuel to run at idle.

If you are setting up for cam break in, you might want to turn the idle speed screw a bit more to up the idle speed a bit.

Regards,

Alex

[cliffords]

750 CFM Four Barrel Street/Strip Carburetor
Part #: 0-3310S

Think it is this one but not chrome version.

[fastco]

Originally Posted by cliffords

750 CFM Four Barrel Street/Strip Carburetor
Part #: 0-3310S

Think it is this one but not chrome version.

Hello...your carb is a Holley 750 CFM... bone stock .

Next time you go to start engine... first remove carbs fuel bowl sight plugs/ the brass ones... bump engine over with plugs out..you should see fuel @ edge of bottom of holes both front and rear..if fuel is pouring out...= stuck float needles or float levels way high....= turn floats down drop float level.....sill floods no matter the float setting? = stuck float needles are crap in needle = renove and clean out needles / WD40 or brake cleaner & reinstall them...this is common problem.
If no fuel seen @ sight hole..float way to low...raise float level..
Also you may want to check dizzy phaze'n to TDC # 1....on comp stroke
it is in sink with # 1 @ TDC now? Sounds like you've checked this.
If so loosen dizzy and when you go to start engine...rotate dizzy counterclockwise/ slightly...see if engine runs better...? no? .try slight clockwise.... better......?
You must get engine up & running @ 2500 + RPM for 30 min or so or cam will be wasted if you continue to bump engine over and not run in ....if not broken in / hot run or dyno'd before you got this engine

Fee this lesson 1 fish & chip & 1 pint local brew ............ Cheers! Dr,Dee

[Clarkson]

"Mechanical fuel pump with no pressure regulator" ??

What fuel pump you running??

As Daryl says you need to get that idle speed up or your going to trash that new cam.

If your going to remove the motor,you could give Tim a call.

[cliffords]

The fuel pump is a
Allstart fuel pump , can't find anything else written on it at present.

Do mechanical fuel pumps need a pressure regulator then ?

As far as getting the revs up , would love to it gives up to 1k for a second only then dies. hence we have stopped now.

Engine out !!!!! what a horrible thought, who is Tim please ?

[Clarkson]

Originally Posted by cliffords

The fuel pump is a
Allstart fuel pump , can't find anything else written on it at present.

Do mechanical fuel pumps need a pressure regulator then ?

As far as getting the revs up , would love to it gives up to 1k for a second only then dies. hence we have stopped now.

Engine out !!!!! what a horrible thought, who is Tim please ?

Never heard of that fuel pump, it sounds faulty!! If it pumps out more than 7psi then you need a regulator.

I hate to say it,if your not happy running your motor for the first time,then you should pull it out and get it setup. Tim Adams 01630638712

[cliffords]

Where is Tim in the country ?

Are there any in car suggestions to engine set up / run in /Holley set up people?

[tarmacscratcher]

Originally Posted by cliffords

Where is Tim in the country ?

Are there any in car suggestions to engine set up / run in /Holley set up people?

Tim is in Shropshire. A bit far from you I think.
You need a regulator...Demon tweeks/Real Steel etc.

[craggle]

Hi David

I was a bit disappointed we didn't hear it today but you will soon!

Just a bit more information as I was standing next to the engine.

We had plenty of fuel in the carb. We did remove the float chamber plugs after trying to run it and the fuel level was probably a bit below the plug. We didn't try turning the engine over without the plug in the hole.

The accelerator pump was giving two lovely squirts of fuel when the pedal is pressed.

Once the engine fired the amount of fuel coming out the brass coloured tubes in the middle of the carburettor barrel was ridiculous. It was like a torrent but only happened once the engine fired and ran up to speed. Soon after it stopped.

Could it be over fuelling due to too much fuel pressure?

I'm confident that the timing is now correct as we removed the left rocker cover and checked we were on the correct stroke. Once the timing was set to the new position it fired straight away but would not keep going.

I would like to get this engine running soon as we don't want to crank the engine over too much in case of damage to the cam.

One thing we could do is get the engine running and broken in on my Edelbrock carburettor then worry about getting the Holley set up after the cam is broken in.

Craig.