poor dyno numbers from 408 :(

[rwhite65]

Here is the combo of a 93 a buddy of mine just bought. Of course I am the one now that is gonna do the wrenching on it since he is still new to the scene as far as hands on.

93 LX, 408, t-5, 3.73 gears. The 408 has edelbrock rpm heads, a Weiand Stealth intake, msd dist, msd 6AL ignition, shorty headers, decent exhaust....but not sure what yet, and a 750 Holley that has been custom tuned by some guy, but I have never heard of him. It also has a mechanical fuel pump....may be stock, I got to get the car over the pit so I can take a look at it and the car may still have the stock fuel line on it. Has a comp cams, but all I know right now is it is the second from the biggest they offer...I hope to get the specs soon.

my buddy dynoed it today and brought me the sheets, and I must say they were not very good. Best horse power pull was 309, if u need the rpm I will go look at the sheets again. Best torque was around 370, but that fell off quickly after 4,000 rpm's. the part that scares me is the air/fuel ratio was around 17.

my first thoughts on this is to check the timing, firing order, but I suspect the car is running out of fuel, so I am really looking at that fuel pump and fuel line. He is gone for the next week and I am going to try and push more horses out of it for him, any advice or help is always appreciated.

One last thing, with the fuel system being so lean, am I gonna hurt this thing by doing runs with it, as I try to diagnose the problem? my buddy (the owner) feels it is just not right in the upper rpm's, and he also said some of the people at the dyno run thought the timing on the thing sounded funny. To be honsest, I think the thing is starting hard for the 70 degree weather.

Ryan