The Injector wireing go's as follows:
Keep in mind... there is power to all the pink wires with ignition on.
The ECM Grounds the other side of the injectors to make them fire.

#1 injector: (E) Pink and (F) Black
#2 injector: (H) Pink and (G) Green/Black
#3 injectorD) Pink and (C) Pink/Black
#4 injector: (J) Pink and (K) Light blue/Black
#5 injector: (B) Pink and (A) Black/White
#6 injector: (L) Pink and (M) Yellow/Black

If you take the main injector plug out of the top plenum where it go's to the spider injector.. and take the plastic cover off the top of the plug to expose the wires/connector you'll find the letters that I labled above go with the ports on the connector. Take 2 off at a time (for one injector) and go from 1-6.
(Picture Below)

 

The injectors are slightly larger than your stock 23.1lb/hr injectors. The stock FPR on the Marine intake is set a little higher also.
I think with out tuning it might be rich on start up but not severe. The ECM will learn the rest of the fuel out for the time being. You'll still need HP tuners when your boosted.
~Scott

 

Whats you gas mileage like with that setup ?

 

We drove it about 800mi round trip before the manifold change and tuning and got 21mpg on the highway.
I'm sure it's at least at stock MPG if not a little above since I tuned it.
It just get's around alot better! Lol.
~Scott

If a turbo charged setup is done right and tuned correctly you won't hurt your fuel mileage. You can get positive results from the extra swirl and force the turbo adds even when not in "boost".
Most stock manifolds/cats ect are restrictive and kill effecency and flow. Adding a good turbo setup improves both.
My 89 Turbo Nissan Maxima get's 25mpg city and 30highway... runs 13.40's at 107.89mph. Engine is stock with 240,000mi. I turbo charged and tuned it 60,000mi ago.

 

Hmm, i like the sound of that, time to start hunting down parts.
with that hptuner are the "credits" you get with it cars you can use it on or is it how many ECU updates you can do ?

 

With HPTuners... there's Credits like you said... It comes with the ability to tune 4 different GM cars (8credits)
When you go to tune new cars it's 100.00 per car.
The way I understand it if you tune one "example" 98 Jimmy you can then tune any 98 Jimmy/Blazer with out purchasing new credits.
I've not had a "Duplicate" vehicle come in to test it on but that's the way it was presented to me when I bought it.
It takes awhile to get usto working with it but it's not that bad.
I've hacked alot of factory computers... every one has it's goods/bads.
I wish it was more "real time" tuning it'd make it faster but I can live with what I've got. Better than most.
~Scott

 

You do realize you're going to have to post your tuning fileup, right?

 

If any of you have HPTuners I'd be glad to mod your program or send you a version of mine that might suit your truck and setup.
No problem there. You'd have to have the exact setup as mine to use the tune I'm at now.
The timing table would be a good start for a boosted 4.3L.
There's alot to gain from the factory tune ... It's yuck.
~Scott

 

thanks for that info.

 

If only mine wasn't a hit or miss... HP Tuners doesn't support the '05 S-Series 4.3L


But soon as I snag HP Tuners, I'll let ya know and we can exchange stock profiles (if it works) and compare differences, lol