99 Denali

[Snowbound]

PCM is out getting tune put in it. Also have EGR deleted along with alternator codes and post cat O2 sensors. I'll be installing electric fans so that will also be in tuning to run fans.

I've decided to just go ahead with the manifold swap so I can put in some 36lb injectors. Stock are 19lb which just isn't enough fuel for this thing. Only draw back is this marine intake is a boat anchor. It's heavy as hell. I'm going to have to change out throttle body or at the very least make up an adapter to mount my bored out TB to this intake.

I'll take plenty of pictures along the way and give details on what needed to be modified and/or what parts it took to get things on.

 

[Tonyrodz]

Seems like you dive in, elbows deep, into projects! I like that! Hopefully everything will go smoothly, or as smoothly as possible. Good luck and def keep us updated on your progress.
Did you get your injectors yet?

 

[Snowbound]

Injectors are in the mail. Should be here by Wednesday- Thursday.

 

[Tonyrodz]

What brand did you go with? Price?

 

[Snowbound]

What brand did you go with? Price?

They are brand new Bosch EV1 36lb injectors. Flow matched to within 1%. They were like $150 shipped.

 

[Snowbound]

Marine manifold had to be modified a little to make it a direct fit. There are no provisions for thermostat bypass hose, temp sensor or EGR. But as you know I'm doing away with EGR valve. Good thing is there is plenty of meat to drill the holes I need for hose and sensor.



I used some epoxy to ensure a leak proof connection on bypass hose. Inside and out.

 

[Snowbound]

I may end using a throttle body from an LS. I will put a 90* elbow on intake and reroute my intake piping to it. I originally was going to use my bigger throttle body but I think I can get more air thru an aftermarket LS TB.

Here you can see stock vs bored unit. I've seen a lot of TB for this intake that they say are bored but use the stock butterfly valve which kinda defeats the purpose of you ask me. I found this one a while back, can't remember the size off my head but it's bored all the way thru. Bottom is stock, top is unit I just took off.

 

[Tonyrodz]

They are brand new Bosch EV1 36lb injectors. Flow matched to within 1%. They were like $150 shipped.

That's a really good price.

 

[Snowbound]

Making progress. Not sure how much farther I'm gonna take it tonight. Might get the front brackets all the way off and remove water pump. I won't drop oil pan until 2mrw so I can get front timing cover off. I still need to order new front cover from EFI Connections and camshaft. I'm wondering if I should even do the cam now, but while I have intake off it would be the best time. Otherwise I'm gonna have to take intake off again and this thing being so heavy, may just want to do this once.





I'm looking at this EGR tube and I'm hoping I can get it off shorty header without screwing it up. I think if I have to pull header to weld it, I might just go to a full length header. Shit is starting to add up on me real quick.

 

[Snowbound]

Started pinout on connectors. I only got one done tonight and that's all I could do. I've been sick the past 2 days and I was tired of just laying around so I got as much done as I could.