A machinist , a turbo and his L31 GMC

[99'Subourbon]

Yeah I noticed everything else, wasn't dismissing it. Just making sure I understood the basic principle of what you were doing.

 

[Mrich0908]

Looks like you have your stuff together for the most part. I'd double check the valvetrain on those heads if I was you...spring pressure, installed height, seals, and all clearances.

I can't tell if there's a cam stuck in there yet or not. What are you running?

There is not a valvetrain per s
I do not have a cam chosen yet . That will be next , then I will buy my valve train based on my cam choice.
I plan on using most likely using a custom grind from comp cams. But everything is always subject to change.

Yeah I noticed everything else, wasn't dismissing it. Just making sure I understood the basic principle of what you were doing.

Ya for the most art what you said is correct . I have to ditch the poppets so I have some type of reliable tuning parameters .
If I had a truck that was a bit older I would have went with a stand alone but in order to keep this a street legal build I have two choices . Piggys back on my ecu or flash a stock ecm .
Megasquirt seems like a great system but for ease of simplicity HPtunners seems the way to go. Like I said though I may decide to go another way before this is over.
Admittedly Ive never built a motor this in depth before so this is all new to me .

 

[slowburb]

There is not a valvetrain per s
I do not have a cam chosen yet . That will be next , then I will buy my valve train based on my cam choice.
I plan on using most likely using a custom grind from comp cams. But everything is always subject to change.



Ya for the most art what you said is correct . I have to ditch the poppets so I have some type of reliable tuning parameters .
If I had a truck that was a bit older I would have went with a stand alone but in order to keep this a street legal build I have two choices . Piggys back on my ecu or flash a stock ecm .
Megasquirt seems like a great system but for ease of simplicity HPtunners seems the way to go. Like I said though I may decide to go another way before this is over.
Admittedly Ive never built a motor this in depth before so this is all new to me .

If it has to be a comp cam, you must have them grind it from a billet core unless you want your engine to eat it.

 

[Mrich0908]

If it has to be a comp cam, you must have them grind it from a billet core unless you want your engine to eat it.

Whats wrong with Comp?

 

[slowburb]

I like smaller operations that pay closer attention to the minute details and QC.

 

[Mrich0908]

I like smaller operations that pay closer attention to the minute details and QC.

Thats fair

 

[TylerZ281500]

finally another build where someone knows what they are doing! im all for this!. whats turbo brand? you said the machining and tolerances were respectable?

 

[Mrich0908]

finally another build where someone knows what they are doing! im all for this!. whats turbo brand? you said the machining and tolerances were respectable?

Turbo charger is a GT45. 69/105 AR Its on the small side for a stroked v8 . But I want as close as possible to instant throttle response as I can get with out ower suffering horribly. Im not looking for all top end gain so I chose this turbo

 

[GT_80]

Thats gonna be sweet! Are you carbureting it or using Fuel injection?

 

[Mrich0908]

Fuel injected , using a LS 411 ECM hptunners and 80# seimen deka injectors
Ashburnham, MA thats bum fuc know where huh? How are the trails up there?

Fuel injected , using a LS 411 ECM hptunners and 80# seimen deka injectors
Ashburnham, MA thats bum fuc know where huh? How are the trails up there?