i give up, my truck isn't geting any faster, infact it just keeps on geting slower.

raise shift points-- gets slower
increase fuel at the top to try and reduce KR--gets slower
increase boost from 3 to 6psi-- stays the same(at wot anyways
reduce timing a little to try and get rid of KR-- gets slower.

i am hoping exhaust makes turns this into a new truck, so far my best time is 4/10ths quicker than last year, then was just a 5.3 with whipple kit, now is yank3000, 2002 6.0, 41lb injectors, and the stock 5.3 exhaust. i was hoping for a full second with the mods, to get this exhaust will have to give me 6/10ths. hmm, doesn't seem likely, time will tell.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by parish8:
<strong>i give up, my truck isn't geting any faster, infact it just keeps on geting slower.

raise shift points-- gets slower
increase fuel at the top to try and reduce KR--gets slower
increase boost from 3 to 6psi-- stays the same(at wot anyways
reduce timing a little to try and get rid of KR-- gets slower.

i am hoping exhaust makes turns this into a new truck, so far my best time is 4/10ths quicker than last year, then was just a 5.3 with whipple kit, now is yank3000, 2002 6.0, 41lb injectors, and the stock 5.3 exhaust. i was hoping for a full second with the mods, to get this exhaust will have to give me 6/10ths. hmm, doesn't seem likely, time will tell.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Forced induction can be a sum-bitch to get tuned in. That's one reason I decided to go N/A. I got tired of dealing with the blower and making sure everything was perfect.

I think the exhaust will really help you out. I don't know if you'll get .6 sec. outta it but, I'd say .3-.4 tenths could be possible. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I think your intercooler project will also work wonders. Heat is the enemy on a blown setup. There could be another .3 tenths in the intercooler setup. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

I hate to bring this up but, have you checked the compression or done a leakdown test on your engine. It might be a good idea if it's not performing like it should.

Anyway, don't get too frustrated it'll work out eventually and you'll have a badass truck. <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />

John <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

 

you could always crap a 8.1 in there and blow it. Im getting a little pissed with my S/C. Just keep in mind that we ar dealing with fullsize trucks that start @ 4800Lbs so to propell that weight, you need big power. As for your intercooler idea, its good, but i hope that you took into acount for the loss of flow pressure do to the resistance of the intercooler. have you figure out what the residual pressue will be after addig the intercooler. are yuo sur you are going too use the right size intercooler? Are you awre that if you put an intercooler on that s/c you will probly have to increase your boost by about 3 to 5 psi to compansate for the loss of air flow through the intercooler? lets say that the current s/c air going into you intake is 160'F@ 8lbs. If you intercoll that the air will drop to about110'F but the resistance of the intercooler the flow pressure will be reduced to about 4 or 5 lbs. If the cooler is too big, youll have terrible lag in boost, if its to small, you wont make enough boost to get the damn thing moving.lets say you spend $500 for the intercooler set up, then another $200 for a 3 to 5 lb smaler puley, your only looking at 30 hp , is it worth it? Slap some N20 in there. good luck
J from NJ

 

ok wise guy, lots of good points, what are your opinions on water injection?

i think i could get an intercooler on there but i realiaze that doesn't mean it would work any better and i think it would cost me more like $1000+ to make it work.

i think i need to shore up what i have right now, maybe a 6.0 radiator because my temps are floating around, tranny cooler because this poor thing has to hate hate me, exhaust. get that to run right and then go with some water injection or a 50 shot.

 

I was in the same boat. I recently tested it out by icing down the compressor and the intake elbow part. Got those reeeeeaaaal cold. Then tested w/ atap and my ls1 edit changes. I had 20* timing programmed in, I got 13.5* timing out. BUT - I showed 0* KR all the way through the run. Results - still didn't feel the power up top that it should be making. I have headers and a 3" borla exhaust.

 

A kid I know owns a shop here in nj called Tuner M. Its nothing but rice in the shop. They do nothing but little 4 bangers that make gobs of hp. They have water injection on a 300zx turbo. I watched the install it. It has helped them, but for the price and the labor, its not worth it. To top it of you have to drill into the blockto install the injectors. The theory behind cooling the cylinger walls and pistons is great, unfortunaly its still water, and if you advance your timing underboost, and run out of water while accel. youl detinate. If you inject to much water youll be fckd. Water cant compress, mabye youll bend a rod, or any other much hoped for thing. What is you whipple running @? 5 lbs, or 8? If your running @ 8 lbs now, we can figure out an intercooler flow pressure, and proper intercooler design for you app. can you runn that at 10 or 11 lbs? Do some trans work. your looseing morepower than you think through your drivetrain. Do some head work and a cam.

 

boom, you say if the intercooler is too big there is lag, what kind of lag? lag before the boost builds wouldn't hurt me too bad but lag after i touch the gas before the engine starts to raise in rpm would be bad. i realize tranny work and heads and cam would all help me out but for now i need to get the power out of what i have first.

i am runing at 6psi now, i lhave pullys for 5, 3 and 9(proabably closer to 8psi) from what i understand they make pullys that would let me get to 15psi max with my setup, 6 sizes smaller than the 9psi that i have. i would bet it will be more like 13 or 14psi so i can crank it up to make up for loss thru an intercooler.

i put the programing back to stock after it kept geting slower and it got a little faster(back to my 4/10) but the drivability is much worse, then i remembered that i told the computer that i have a 6.0 instead of a 5.3 and when i went back to stock i didn't put that back in, that is my next project is to tell the computer that i hve a 6.0 again and see if it drives nice like it did before.

 

I would think that fixing the ECU should be your first concern. im sure that wouldmake a world of difference. As for the intercooler, if its to big, youll have a a bottleneck effect and you will cause lag in the air going into the intake. if its to small you wont see the benefitsof the intercooler and you wont flow enough air to the intake, thus causing a large amout of pressure loss. The best thing you can do is call Spearco Intercoolers, they can build the intercooler for you needs, but itll cost you some coin. As for having the ability to run 15lbs, thats a bit much for daiily driving, but if you can have a cold 10lbs going into that block, its gonna haul ***. Just supply it with a lot of fuel. open up your exhaust if you can too, that will free up some HP, and TQ. With that power, get ready for a trans build, youll need it, and the ever so great TQM.

J from Dirty Jersey <img border="0" title="" alt="[Cool]" src="gr_images/icons/cool.gif" />