poor dyno numbers from 408 :(

[Fat0eknee]

Originally Posted by Dark_5.0

Maybe the back barrels are not opening??????????

I think he is on to something about the secondaries not kickin in... seems like a pretty reasonable explanation

[rwhite65]

I originally thought that, but after some drive time, the thing feels like to me it only pulls strong when the four barrels (pedal mashed) are kicking in. I am not exactly sure on this, but I am gonna play with it tomorrow, and see if I can see the barrels squirting or not. At this point, I think something is wrong with the mechanical advance in the distributer.
Ryan

[~The Jester~]

All that's in there is weights, and pins. Does he have the sheet with that came with the distributor? It explains it all in there. If not, head over to www.msdignition.com and hit their message boards, tech guys over there are AWESOME.

If the stock fuel line is still on that car, take it off and beat him with it. Find out what pump he's running. Stock ain't gonna cut it there either. That's just silly. Check the jets in the carb, I'd START with about a 70 up front, and an 80 in the back. Make sure that the accelerator pumps are working, make sure the levers didn't get messed up when the guy put the bowls back on. Check the secondaries as well.

It's definitely a fuel problem IMHO. Timing will make the car lazy, but it won't give you an AFR of 17! Think fuel, think fuel, think fuel.

[rwhite65]

Well, the fuel line has been updated, a real nice large new piece with a mechanical Carter high volume..although I have my doubts about the mechanical pump.

I have not taken the carb off, actually need to take the distributer apart tomorrow and take a look inside it too. Now that you have given me a reference point on what jets to look for, I will look for those as well.
Thanx Jester!!!
Ryan

[andy669]

Its possible that the distributor has had the weights removed and they were just running total timing. Its kinda hard to guess on jet sizes without knowing whats been done to the emulsion circuit. You said someone had worked on it, thats usually the first thing carb guys do. A bigger emulsion circuit will want a bigger jet size.

Get rid of that mechanical pump and put a good electric one on it. Try to get the A/F down to around 13.5.

Andy

[rwhite65]

http://www.chucknuytten.com/ Any of you guys deal with this guys carbs... this is what is on the car. I am gonna call him today hopefully.
Ryan