can someone tell me EXACTLY what i need to do once i get the 43lb injectors and the new tune from allen? I am told i need to remove some of the whipple stuff. What? the whole whipple computer? the boost-a-pump? I don't want to fuq this up. Also, how in the hell do I get to the injectors on the passenger side? I assume the compressor needs to come off right?

 

Read this thread: https://ls1tech.com/forums/showthread.php?t=173600

You will be getting rid of all of the Whipple computer stuff. Not sure if you need to keep the boost a pump... Ask etc in that post. I believe he said he was going to take his off. It seems like you two have a very similar setup.

I have heard people doing injector swaps with the blower still installed. It will be a tight fit though. I always take mine off for anything. I can reinstall my Whipple and my intercooler pipes in about four minutes. I'll have to try it blind folded sometime

 

scan the post ryan linked. have'nt had time to mess with the boost a pump to see if it actully does anything with the computer disconnected. truck runs fine with computer offline so i hav'nt made it a priority. got the stuff to clean up my bypass, [1/8 npt plug and vacumn caps] . the inj's can be installed without pulling the compressor, it's kind of a bitch, but it's a toss up as far as time is concerned. just be careful when you pull the fuel rail cross over tube [ connects the rails, go over intake manifold] , there are blue o-rings in the seats don't drop them, there is enough room between the block and the intake manifold for them to disappear forever. you can get the fuel rail out it just takes a little patience. you don't need to remove the aux inj's or return the fuel line to stock [though i plan on doing it] just unplug them for now. if you got a 10 way plug for your harness, that will return your wiring [whipple intercept] back to stock. if not you either need to get one or pull the pcm and wire back to stock or cut the harness plug off and rewire it there. if you did the install yourself the wiring thing should be self explanatory if not i can tell you what to do. between this and the other post that should do it, a few of us have done this conversion so if you have any problems i'm sure we can help you out. e

 

Thanks to both of you. I was so friggin confused. I actually spoke to Allen this morning and decided to just tune for the smaller pulley right now. Then I'm going to probably add a alcohol/water injection system and up the timing, then i'll do the injector swap. I think. I just haven't heard enought concrete evidence that the injector swap is worth the $400+. I will definately print this info though for future use. Thanks again.

 

denalihd, here's a few things to think about. all this is assuming you are running the whipple computer, stock inj's and whipple aux inj's. first, the whipple computer is a piece of crap. having said that, it is in control of your truck, scary. the way it works basically is, the whipple computer lies to your pcm, essentially telling it the s.c is not there. it intercepts the signals modifies them and sends them to your pcm, it then compensates by adding fuel via the aux inj's. without having it dyno tuned with an exhaust gas analyzer there is no way to tell what the a/f ratio is. second: your stock intake manifold is designed to flow only air, not mix fuel. you will pick up h.p and lose any lean spots that are inherent in the aux inj design by installing larger direct inj's. if you're going to run a smaller pulley, you'll have to bypass the solonoid, it limits you to 5lbs of boost. just installed a vac cap and plug to take the solonoid completely off, instead of 5psi at 5500 rpms i now see 6psi. though some guys are running the computer and larger inj's ,after what i've been through with the computer i recommend doing the full conversion. i know it's expensive considering how much more we paid just to have that computer, but it runs 10 times better without it. good luck

 

Well, i'll probably do that conversion sooner than later. I hit 6.5psi all day long. When I had the smaller pulley on there for 1 day a few months ago, i was hitting 8psi. But I was also getting huge KR numbers.

I have the older 2 pulley setup on my whipple. I don't know if that makes a difference as far as the conversion is concerned. I do know that I have some days when the truck is real strong and other days where it's a dog. Can't figure it out. not doing anything different. same gas etc.

I should be getting the new tune within a week. I'm gonna try that out and see what happens.

I'm definately not confident in my mechanical abilities to change the injectors and to rewire my pcm or whatever. i didn't do the install myself. I'll have to really think about it before i dive into that project. Thanks again for the info

 

oh, i figured you had the single belt since your truck is an '02, but i guess i did'nt get mine till late last year. i have no idea how much of what i said is applicable to your setup. i'm sure allen is giving you good advice, if your interested in doing the inj mod or if you even need to do the pcm/solonoid mod we can ask around here and find someone who has your system and knows how to do it. e

 

replacing the aux injectors and piggyback computet with 8 new injectors and a tune will make more power. kENNE BELL DID MINE. THEY ARE VERY CONSERVATIVE . THEY TUNE FOR LONG TERM AND SMOG COMPLIANCE.THEY LOWERED MY RPM LIMIT TO 5500 AND IT SHIFTS AT 5100 EVEN SO IT OUTPERFORMS MY STOCK WHIPPLE THAT I USED TO TAKE TO 6000 RPM, SHIFTING SHORTER I STILL PULL MORE CONSISTENT 100 MPH 1/4 RUNS. IF YOU TUNE IT MORE RADICAL THAN KENNE BELL IT SHOULD JUST SCREAM THAT MUCH HARDER.