11.20's -11.30's is this my limit w/ this combo

I use direct scan, My chip is a 25/23 extender chip. I have the th350 trans and have the 3rd /4th gear wires grounded so the ecm thinks its in first/second gear. Direct scan shows 25.3 degrees timing at wot, but i started at 22 and went up to 23.75. I have played around with shift points and it seems to run best numbers shifting at 6000. I do drop 1000 rpm on shifts so thats maybe why it runs better numbers. Flash stall, i could pull car out get up on t-brake and see what it goes to, i usually lauch it around 45-4800 but it will go higher, i just never tried it. Converter slip- not that sure what car weighs but there is a grain tower with scales rt. down my block,maybe they will let me weigh car. but i do cross finish around 5300. BTW it is a coan conv. so i can send it out for a restall if needed for 100 bucks versus a 800 dollar ptc unit. Thanks for help on this Bison i appreciate it. Also just using the denso O2 sensor reading low 700-750's during a run.

Thanks, i will look into your suggestions.

I'd also look into some fresh valvesprings. You've been running those Comp 980-12's pretty hard for the last year or so...


K.

Shoot, I've had those valve springs in there for 4 or 5 years since KAI at kn performance did the heads. What is the recomended valve springs these days. I also found a bunch of leaks in the intercooler pipe connections. The t-bolt clamps had some bends in them which was leaking air at 4 connectors. Bison do you sell springs. Thanks

I'm thinking it was 2008 when Khai and I were working out of the same shop and you got the heads. I know for sure they're Comp 980's, and they're probably setup on the loose side, IIRC. That's typically what he installs with flat tappet setups, unless otherwise requested differently.


K.

Thanks i went back in my PM"s and saw 2007 but it may have been 2008 when i put them on. Im going to look into the 981"s, Thanks for all the help guys, hope to get this in the tens this year.

Ok, i put new 981 valve springs in. They were shimmed already from knperformance. I went out 2 fridays ago it was 74 degrees out. Right off the trailer it went 11.32 at 118 at 21 # boost. I still had boost issues and could only get the boost to 22-23# so i started going up in timing my timing went from 21-22 degrees in .25 increments.. i ended up running 11.24 at 119.89. I think i figured out my boost issue. I put 20 psi of shop air into my rjc boost controller with it screwed all the in and my wastegate opened. I ended up streching the spring so now i starting around 23# and can go up to 27-29-#. I will be racing at the MWBC so we will see if i can get this thing in the 10's. Thanks for all the help, I also talked with Coan and they said they cant do anything w/ the 10 inch converter i own but if i bought the 9 inch they can dial that one in more precisely. If i buy a new converter if WILL be a PTC.

It's slow from 60' to the 660' or something. With those 60' times and 119mph it should run 10.90's. The valve springs were a step in the right direction. I'd look at how long it takes to reach peak boost. I have forced 30psi through a stock neck intercooler and ran 11.0 117-118 but your RJC valve or gate me be letting the boost come in too slow.

I will post up the 60 - 660 times later today. Thanks, it was in the 1.52-1.55 60ft. times on that 11.24 pass.

60ft----1.558
330----4.597
660----7.156 @95.97 mph
1000----9.363
1/4---11.242 @ 119.69mph