just got off the dyno mods are cc306, 52 mm tb, longtubes 2400 slp stall,obd1 conversion and all the little stuff.im thinking the valves are to tight i have no idea but im pissed cant figure it out the air fuel is almost perfect.help!!!!!
max power:306.09
max power:286.69

 

Oh. Wow.

 

Could be a number of things man. For starters, your Air/Fuel ratio starts off F-A-T down low. It starts at 11.5. Lean that out down low and it should pick up some overall.

Are you getting any knock retard??? That could have a profound effect on power output. Rockers, poor compression, ect, can all come into play.

 

Damn that sucks....


hmmmm,
-john

 

My eyes hurt just looking at that. I know this sounds dumb, but check your throttle cable. I remember seeing a dyno that looked just like that a fewyears ago on a 5.9 Dodge Dakoda. Basicly, after about 3/4 throttle it wouldn't go any farther... kinda strange...
thats probably not it. it's just that the power down low seems fine.

 

I know how that feels.

My dyno charts were even WORSE.

 

Does it feel more powerful? Maybe something was wrong with the dyno.

 

no knock retard just got off scan tool.it feels fine and runs great just lack of power i mean come on numbers close to stock.286 for torque damn!bryan at pcmforless says with no real exhaust problems and no real intake problems has to be compression are rockers to tight!i had them adjusted with motor off and 1/4 turn past 0 lash some say thats way to much?so should i readjust them to 1/16 past 0 lash.will it really bring me up to where i need to be if that is indeed the problem.im hoping around 340 or better is that possible with a simple adjustment of the valves??man this sucks!!

 

I just watched that video the other day too. My buddy just hasn't given me the camera so I can get it on to the computer.

If the valve lash is too tight, then the valves are going to "hang" open so to say, and YES, that's definitely going to cause you to be WAY down on power.

A quarter turn past zero should be fine, depending on what lifters you're using. If they're Comp R's, then that may be a bit much.

 

i have ls1 beehive springs pn#26918-16 and comp lifters pn#850-16 im pretty sure these are comp r lifters.

 

Just as a comparison - before my tune I made

313.0 Max Power
356.2 Max Torque

http://home.neo.rr.com/darkhorseracing/dyno.htm

I'm guessing i'm around 330hp now - not sure tho. I'll have it back on the dyno for some more tuning soon enough.

 

Those are the OE replacements. 1/4 turn should be fine on those.

 

come on guys im lost after all the down time and money that sucks for show.i need help theres something going on and i dont know what those numbers suck for all the mods i mean close to stock.as stated above i dont have comp r lifters and the 1/4 turn i used was ok then what else i was set on that being the problem.help!!

 

How does the car run otherwise? Plugs/wires? Fuel filter? Have you logged it?

 

i know u guys can help well im in need .no one around here where i live knows lt1s that well so its basically up to camaroz28.com for answers..