skyhighsami

iTrader: (8)

I am seriously thinking about putting some form of FI on my wife's Yukon. She said she didn't want any lag she just wants to hit it and go so that makes me think Maggie, but a properly sized turbo would also do well. I have no intentions of putting some massive stall in so nothing more than a 2k or 2400 stall but it would have to be pretty tight I don't want something that is super loose and no fun to drive. Right now the truck has 114k miles on a 5.3 and I was thinking maybe building a lower compression 370 with some stock or mildly worked 317 casting heads in it with either a 112 maggie or unless I can find a smoking deal on a 122. The goal power would be around 450 wheel through a 4L60E and the stock rearend with 3.73 gears. I understand that the tranny will have to be built and I am not too terribly worried about that. So my questions are, should I go ahead and get the blower or turbo now and boost the 5.3 and just slowly start building the 370 or should I get the motor and have it ready then get the FI?? Are my goals unreasonable for a low boost get in everyday and drive low maintenance setup in a Yukon XL? What would be the better power adder for this particular vehicle, my goals, and my wife's request? What would be the quietest, most seemless power? Would my power goals be possible NA and a mild setup or would I need a badass 370 to make that number? I don't want a choppy cam so a Maggie with the Lingenfelter cam sounds awesome because it should make the power I want and be very quiet. The turbo also interest me because of the nature a turbo works and it's benefits. I know this is asked alot but I needed to know a more direct question about my situation and what would be best. Thanks, also I am not against putting a built 5.3 or LS1 in but I thought the added cubes of the 370 would help down low with torque

hellbents10

iTrader: (10)

If 450 to the tires is your goal the 112 would work great and the 122 would be even better. Can not be beat for bolt it on and go at that power level.

sharpshooter

iTrader: (10)

With the awesome deals going around right now on a lot of 112's that is the way I would go to achieve your goals.Check out what Breeze has for sale right now.I have seen his set-up in person and it still looks brand new.
I would really just put the 112 on your current set-up and then slowly go from there when you want more out of it.It will be a totally different truck with just the 112 set-up.
Also I think it will meet both of your goals and be a reliable set-up.

sharpshooter

iTrader: (10)

I just saw you have been checking out Breeze's 112 already.

skyhighsami

iTrader: (8)

Yeah, I am seriously thinking about just getting a 112 and throwing it on the 5.3. Then build the tranny and start getting the new short block together. This is what I am thinking and tell me am I off base or not. I am thinking a 370 with stock rods and crank and just forged pistons maybe around 9.1 CR. Some mildly worked 317 castings nothing way over the top maybe just a valve job and minor porting. The GT2-3 or whatever cam from Lingenfelter that seems so good with a Maggie or a custom grind along those lines nice and mild. Some LPP headers since the quality and price seems 2nd to none and some Efans. Then maybe spin the blower to 10 psi on the 370. Would that be ok with that 112 on that setup and what should that make to the wheels? I am thinking that would be around my target range and make really good torque down low. I am not too sure on the converter that is why I wanted such a mild cam. I have read where the stock TC is good but something like a 2500 is perfect so maybe I would put in a really good converter I just don't want something sloppy and loose. I was something tight that will not cause some much throttle response to disappear. Her truck is getting painted now, then a new interior, suspension and stereo. It is already lowered with 22s and big brakes and calipers all around I just want a nice complete package. Just for compairson sake what would a 370 with some CNC 317s and a cam like a TR 224 on a 114LSA make to the wheels?? Just so I will know roughly what NA and FI makes. I would think around 375whp NA and my setup above that I am considering would make between 450-475 does that sound about right?? Thanks for the help

hellbents10

iTrader: (10)

You do not even need anything that wild, stock heads and a gt2-3 and be on your way with 450-475rwhp.

I tuned one a little bit ago with a 3" pulley and shorty headers and it made 455rwhp though a corsa. BTW it was a 6l Silverado SS.

TurboBerserker

iTrader: (1)

I'm with TJ here. Bang on a 112 and get to it man!

skyhighsami

iTrader: (8)

What would a 3 inch pulley make boostwise? Would there be a better cam that the Lingenfelter cam? I just like the LSA and the duration. So you are saying just throw on some boc stock 317 heads with just some better springs for the cam? Should I not even work over the heads with some better valves and combustion chamber worked? Would I do better to maybe find a good low mileage LQ4 and just do a cam swap and strap on the 112 or build a 370 and put the 112 on it. I didn't realize that 450whp would be so easy with a 112 and 6.0

03tahoe22

iTrader: (13)

The 112 and 122 reach there limits with a larger more performance...stroked ported polished motor. Actually I make 11psi on a 5.3 with a 3.0 so i would guess if it is a 6.0l you would be making close to 8psi with a 3.0 and 10-11psi with a 2.75. Bigger motor = Bigger Blower "TVS"


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