I added a Vid to the first post

 

wow that's nice . . . . . must be the running boards . . . !

 

great numbers! hopefully i can get there too...

 

nice! not bad at all. Im sure if i could tune my **** myself i could squeeze quite a bit more out of mine, but im happy with my mail order tune for a while.

 

Looks good.It will make a better dyno graph-more power if you find out what made the dip and wavy graph.Looks like your slowly eating the tranny or converter.If it smooths out I bet you'll be at 540rwhp.

 

I didn't spend any time tuning it, I just made 1 run, put 2* of timing in it, and made 2 more runs. Once I saw 500/500 that was good enough for me . It was getting late and there was still a couple of guys left to go.

I think the dips are from some random misfires, as the plugs are about 2 years old now and some guys said there was a couple quick puffs out the exhaust, that looked like a misfire. I think the trans and converter are holding good, looked at the RPM/MPH graph and there was only a .5 MPH difference from the beginning to the end of the run and it was smooth. The dip right after the boost peeked was from a 4* timing pull that came from some where, as it wasn't KR according to the log.

I know its got some more in it. One of these days, I might schedule a hour or two on the dyno and do some fine tuning The motor doesn't scare me, but the tranny does,

 

Thats awesome.

 

was it maybe burst knock it won't show up on logs it just pulls timing. happened to me. i loged for it and found it. just upped my burst knock tables a little and it was good. just a thought.

 

as a 4.8 owner i can proudly say " Nice JOB" lol thats tight man posts some more vidz

 

The 4.8 motors can take alot of abuse.

I made 525rwhp and 589rwtq with a stock 4.8 short block,stock ls6 heads and a 224 230 cam.
I sprayed a 225 wet on it and abused the **** out of it for 6 months.It finally broke the ring land on two pistons after over reving it to 7800.