cam is a comp 234/232 598/595 115+1, seth at cmotorsprorts picked it out for a turbo 409 set up i have planed but it in a stock 6.0 right now.

first i did all of this http://www.ls1tuning.com/iboard/index.php?showtopic=9


that allowed it to idle in gear and in park but anytime i let off the gas it would hunt, surge and sometimes die, if it didn't die it would smooth out in just a few seconds.

then i adjusted the throttle followers, i maxed out all of those numbers. didn't seem to help at all.

last thing i did was the old drill a hole in the throttle plate , what a diference, runs great and never died at all, i drove around for 20 minutes driving normal and going from WOT to a quick stop. it still hunts just a little once or twice before it settles but i only put an 1/8" hole in the plate, thinking about going a little bigger.

there may be cold start or hot start issues i have to look into, not sure but for a warm start and driving around it is working great. there is a little more valve train noise, i can just barely hear it in the truck. it is still a dog out of the hole but i think that is where i want to be, bigger motor will bring my peek tq down and more tq will push the stall speed up, hopefully they will come closer to one another without stalling right past the peek tq.

driving impresion on the cam.... i am 99% sure i am slower NA than i was before due to the stall issue but at 4000rpm it is like someone put a 50shot on there. just like a light switch. i got my a/f ratios inline but am still running thru the cats and 4.8 exhasut, the cats may even have some debri pluging them up. i hope to have them off tomorrow, along with a cut out. i hope to get out and do some gtech tonight still, i want to know how it is doing. my highest maf reading was 34lbs before and just now i hit over 41lbs , that cant be a bad thing. at 6400rpm even thru this crapy exhaust it is still pulling. my shift back rpm right now with a 6400 shift is 4250, that converter is TIGHT!! i really cant wait to spray on it and see what happens but i got a few things to do first.

it is a little lumpy at idle but i bet that could be mostly tuned out too, it just sound like i pulled one wire is all.

i was pulling 1.95 60's before NA, i bet i am more like 2.2's or worse now, it realy is a dog out of the hole, i will have some numbers soon. this may sound like a bad thing but the stall the way it was before really was close to ideal for NA, thats not what i want, i dont race NA and the turbo will really push up the stall speed i bet, i can still brake stall to over 2000rpm easy.

 

Good job! That converter sounds like its going to be sweet with that 409/turbo.

Are you gonna put a window switch on it with that new stall?

 

i had a window switch before, i only have 3000 and 6000 pills for it though. i did just get a halan adjustable window switch and plan on seting it at 2500 and 7000. shift somewhere in the 6200-6900 range.

 

DId you put a set of rod bolts on that thing too?

How difficult was that? Would you consider doing it with the motor in the truck if it were on a 2wd truck? I think that's gonna be my next engine mod.

This cam is still pulling hard as hell at 5700 with the blower on it.

 

i did rod bolts, head studs and springs. you might be able to do them in the truck but i bet it would be a pain. if the pan would pull strait down and off then you could probably do it in the truck but if there is a cross member in the way i dont know.

 

The cross member drops like the one for the tranny mount, after that, getting the pinion for the steering out of the way, then the pan will come straight down.

 

did a few gtech runs, as it stands now it is worse than i thought, my best before was a 13.37 with a 1.96 60', with just a few runs my best was 14.08 with a 2.28 60'. mph was about .5 slower too.

now looking at the chart i can see clearly that 6400 is way too soon to shift, it is just reaching the peak hp and bam i hit 2nd, the hp falls hard after the shift. i can see that i got about 30rwhp out of the cam but it is only above 4300 and it takes me too long to get to 4300 to make up the time.

i think with a higher shift point and free flowing exhaust i can make up alot of the diference, maybe most of the diference but i dont expect that 60' to drop much. hopefully that tight converter will pay off once i spray it, or boost it if that
turbo ever shows.

 

That's how mine feels. Sure we are talking a difference in cubes, but hell, I can't even tune mine. I had to send the Edit module back. I can't wait to tune it and see if that cam was worth it in the 4.8. I have the same idle issues. It sucks to make a turn and the truck die. I'm not ready to drill the T/B yet. I'm going to let Jayson dyno tune it first, and go from there. Can't wait to get it dialed in and then on to the tranny. So you think you can make the difference up, but what did you expect the difference should have been?

 

Thats exactly how the ATI feels with the stock ot TT3000 verter. Runs hard on top, but takes forever to get there. Peaky HP just doesn't get these things down the track very well without the right converter.

Your stalling at 2600 right now? I think thats gonna turn out to be the perfect converter with that 409/turbo.

 

Also, what have you heard lately on that turbo?