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Coil on plug kit worth it?

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Discussion Starter · #1 ·
Starting this thread to get help amd suggestions. Swapping my 3100 monte to a 3800 twin turbo, 3.1 has developed a rod knock and Ive put too much time into the 3.1 to care about it so Im going to be building a new engine top to bottom. Got my 3800 for 300 bucks currently torn apart in my garage ready to be rebuilt with upgraded internals. Got two junkyard turbos for 80 bucks, no play to the impellers so Im gonna run them until I can swap for some garrett's or smth. Planning to port my heads when I got time. Ive never done any of this but dang youtube sleepers got me hooked.

First questions. How do I tune it once its all built? Boost control or just gauges?
Planning to build my own turbo kit as Im a pretty good welder and I dont want to deal with droppin 3-5k on a kit that wont fit.
Any Ideas as to what ecu Ill need for it if I do need an aftermarket?
Looking for around 400 hp with room to grow.
 

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What vehicle is this in? Glad you are trying to plan it out, because you'll be able to search here and elsewhere for tried & true methods for success. It's not too difficult to hit 400hp with a turbo 3800, as long as you fuel it properly.

A pcm/harness from a junkyard will give you all you need, and HPTuners is the basic method for doing anything necessary for a tune (you can even go thru ZZP to get you a starting file for a couple hundred to save the chance of blowing it up before you get to enjoy it some).
 

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Discussion Starter · #3 ·
What vehicle is this in? Glad you are trying to plan it out, because you'll be able to search here and elsewhere for tried & true methods for success. It's not too difficult to hit 400hp with a turbo 3800, as long as you fuel it properly.

A pcm/harness from a junkyard will give you all you need, and HPTuners is the basic method for doing anything necessary for a tune (you can even go thru ZZP to get you a starting file for a couple hundred to save the chance of blowing it up before you get to enjoy it some).
This is going in a 99 monte carlo thats stock except for fuel pump, replaced it with a bigger pump when the first one failed on me. The 3800 is out of a 2003 impala, all the motor mounts line up with where the original motor mounts are. So stock pcm and a hptuner, thank you. The only thing holding me back from buying the rest of the build materials was whether or not I needed an aftermarket pcm/ecu so we are full throttle from here on out thank you :) also good idea for a zzp flash to get it runnin I hadnt thought of that yet
 

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Discussion Starter · #5 ·
How do I remove the crankshaft bearing holders? Dunno what theyre called but they hold the crankshaft in place
 

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Lifters are a common upgrade to LS7 style, or any LS-based upgraded ones, because our stock lifter can pump up under higher load and cause float.

There's 2 torx screws holding the cam in the front cover. A few 3800 cam swap videos on YouTube will show it, along with tips on timing chain alignment to make sure it's back to where it needs to be (these engines don't need advancement on the chain).
 

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Discussion Starter · #7 ·
Lifters are a common upgrade to LS7 style, or any LS-based upgraded ones, because our stock lifter can pump up under higher load and cause float.

There's 2 torx screws holding the cam in the front cover. A few 3800 cam swap videos on YouTube will show it, along with tips on timing chain alignment to make sure it's back to where it needs to be (these engines don't need advancement on the chain).
I took the two torx bolts out I just cant seem to get these out, Ive been following a rebuild guide online, In the video he uses a rubber mallet and a screwdriver but I cant seem to make enough room for the screwdriver underneath and they keep moving back into place, also thx for the help I appreciate it :)
11197
 

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Oh, the crank. Never had to crack one open. My bad.
 

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Discussion Starter · #10 ·
Figured it out, didnt realise there were still bolts holding them in on the sides 😅
 

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Ah, yup, cross-bolted center main caps. Part of why these can take 500+hp without needing any significant upgrading of the bottom end.
 
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