BigTex

iTrader: (16)

Jim - you get your exhaust work done yet? You were really moving along there for a while and the last I heard, you had you ASMs waiting to be installed. Just curious.

parish8

iTrader: (6)

nice to see someone cares <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

nope no exhaust yet, i have the headers and a pair of huge 3" turbos in the garage. full 3" on the inside but not the strait thru kind. i also have a set of 3" tail pipes ordered but they are on back order and wont ship for another week(i hope anyways) i even have someone lined up to do the intermidiate pipes(no cats). this is kind of an old school set up and i know i will like the sound but not sure how free flowing those mufflers are, they are rated by dynomax at 250hp each but not sure what that means. hopefully only another couple of weeks.

i am hoping for huge gains and am looking forward to going after even more, been researching water injection, propane injection, nitrous, intercoolers, heads, cam. anyone have oponions here on what the next logical step would be with a whipple?

BigTex

iTrader: (16)

Looks like you have it under control and sounds like you will have the exhaust completed soon.

Man, you have done alot already. Of course there is the need to get air cooler charge. Water injection may be a good solution. It would take some expensive engineering to get an intercooler setup going. But you already know that. I dont have any info at all on propane injection.

Personally, I was very suprised that you installed that 6.0 before doing any head work or installing a cam. But then, I am as impatient as anyone else too. Here is what direction I would go: buy another set of 6.0 heads. Have them polished and little ported. Really clean the chambers and hopefully reduce compression some. Add thicker head gaskets. Try to get that compression down without having to pull the motor. Install a blower friendly cam when you do the head swap. Then sell your current heads to get the money back out of them.

parish8

iTrader: (6)

an intercooler would be tricky but i could do it, just not sure if it would be worth the time. i can get a huge intercooler from a 7.3L power stroke for about $250, then have to move the whipple over a few inches to the pasenger side, run some tubing, that kind of stuf, i am prety sure i could do it for around $500 but alot of work of my own in there. and not too sure how a big intercooler after the throttle plate would work out.

water injection is cheep and easy and would probably get me another 2-3psi?? 30-50hp if it worked?? have to keep it filled and not sure at all about those numbers.

heads and cam would be huge i bet, 100+hp i would think, how much hp can the ASM headers support?, might have to put in some cut outs in the exhaust.

these trucks are great, being based off the ls1 and all i may never run out of ways to get more hp. however if the exhaust doesn't get this thing running much better i may stop throwing money at it. i would love to see it in the 12's some day.

BigTex

iTrader: (16)

I hear you. It is frusterating to spend the time and money and not see the results. I would love to see a excab Z71 in the 12s too.

Did you ever do anything about wheels / tires?

XLR8NSS

iTrader: (4)

Hey Parish8

I saw your post on the other site about your exhaust.

My truck had JBA's on it with dual 2 1/2 pipes running thru two flowmaster mufflers going out the tailpipes. Whoever put the tailpipes on had them all messed up(banging and rubbing) so I cut them off at the muffler. The truck actually got quieter. It has two cats also. It's not loud at all cruising but, at WOT it opens up nicely.

I'm going for a little lighter and higher flowing setup so I'm going to modify a set of AS&M's with a 3.5" collector running into a 3.5" y-pipe(no cats for now) and then back thru a single Magnaflow 3.5" muffler(no tailpipe). I'm hoping to have all the parts here by early next week to do this so maybe I can get you a sound bite of what it sounds like with the different configurations. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

John

PS - Nobody forgot about you <img border="0" title="" alt="[Razz]" src="gr_tounge.gif" /> , we're just waiting for you to get that exhaust backpressure down and really wake that truck up. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

parish8

iTrader: (6)

sweet!! i got them bitchs on. took me 4 or 5 hours and i had to pull the whipple, that thing is heavy by yourself. just fired it up for a second, it is 11:00 here. sounds very nice with open headers, i tried pulling the pipe going to the muffler and it just sounded junky but with open headers it sounds very racy. probably wont get exhaust till tuesday and probably wont get any new times untill friday or so. any guess what it will run? previous best of 14.9 with lots of back presure and lots of knock retard.

i may be dreaming but i am hoping for 13's after a little ls1edit tuning

BigTex

iTrader: (16)

OK - so you have the headers bolted on, but are waiting for the rest of the exhaust work? Excellent!

Whoever does your exhaust work, make sure they hang everything very secure. You dont want anything banging around causing false knock. Also, something I learned the hard way, you might want to add in some extra flanges somewhere so you can easily disassemle it. That way, if you need to get to your tranny or anything, you can just pull off the front Y part.

parish8

iTrader: (6)

sweet!! it is at the shop, they are nearly done, all they have left is a few clamps and some hangers. i can't wait to fire it up and drive it home, that 3" is prety fat and the tips they got must be 3 1/2" with a slash cut so they look even bigger. they did make it so i can take the crossover pipe off for tranny removal and the pipes are smaller, the size of the colector for the first foot on the pasenger side and all the way thru the crossover on the drivers side but 3" all the way back from there, they even got some tail pipes there, both out near the factory location, i am pumped!!

just one worry, on the way there the truck went from running ok to barely runing at all, wouldn't idle, missing alot, ses light flashing, i have been told by many that driving there with open headers is ok but i am a little worried. i will know as soon as i get off work tomorrow.

CHAGO

iTrader: (1)

dont worry about the truck wanting to die with open headers, i did the same thing for a couple of days, the bastard would die on me here and there, but i tell you, i scared many of cars when i was on the road. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" /> it was amazing how loud it was when i was at WOT, i even scared a T/A!!

sounds like a kick *** system you got going there, keep us ext cab guys posted so we can get some ideas!! <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />