i have a Z71 and was wonderin if my radiatior was bigger because it is a 4x4 than a reg truck, and if i could put ls1 elec fans on it and how hard would it be . also how much and where from, thanks.

 

I'm Not sure about the radiator but its pretty easy to install e-fans on a truck just wire it to the battery and put a switch in your truck. you can find fans at pretty much any junk yard just because so many idiots wreck those cars thinking they're dale Jr. or something. they run for about $100 used

 

hahaha ( about the dale jr. thing) thanks , ima check on that today, can u tell a diff in hp and tq? it would be worth it even if u didnt cause elec fans are less drag on the motor witch means cooler temps and mo power . right?

 

I'd guess a couple horsepower difference, maybe 3-4hp max.
I mainly got the LS1 Fans to clean up under the hood. They take up so much less room.

 

Got mine off E-Bay for 80 bucks. Just type in ls1 electric fans.

 

Your 1/2 ton Z71 has the smaller 28" radiator like mine did, I got my 3/4 ton 34" rad for $70. Just keep an eye open for them.

If you're looking for some power, skip the fans now and check to see if you have the Flase KR that most 99s and some 00s do. Then once you check that out, I'd get you a custom tune of some sort. It'll be a bigger difference than any mod next to a blower can make. These trucks are severly detuned from the factory.

I like my fans and they help with off idle power and better throttle response.

 

What is this about the KR?
I have heard so much about it with the the 99-00 years, in which I have a '99.
What can I do about this? Is it the sensor, or the pcm itself?
What is the fix for the false kr?

I wander if Allen tuned KR out when he tuned my truck?

 

KR = Knock Retard. It's stupid, I think GM used overly sens sensors in the early years. My '99 Z71 LT (older model of what i have now) had that problem too. It was a turd from a dead stop and just was slower than the one I have now.

I'm VERY confident the power ratings between the two trucks came from the tune, NOT the cam. The LSA's changed between 99 and 00. I'd shoot Allen a PM to see, he's got base tables for pretty much all truck and could tell ya.

To be rid of the Flase KR, you're gonna have to be certain you have it. I believe it's 8* you get. Run your gas pretty much out, then get some 104 unleaded in there or make your own with Toulene/Xylene. Like 3-4 gal of 91+ with 1 gal of that Toulene for some race fuel. If you have KR on a stock tune with 104* oct fuel, you've got False KR.

On the fix, I dont' know if new sensors will fix it or not. I recall 99silver5.3 did this, I brought this to his attention and Jared got rid of the false knock and said it ran a lot better just with that. Then he flashed in an '01 spark table (still stock table, no timing added) and it's better still...he also has NO TqMgt like me.

You're going to have to wire/solder in some resistors. Pretty easy.

I'll IM him this link and see if he can post up on what to do.

 

i live about 30 mins from allen, if its allen futral of Futral Motorsports, ill have to ask him about it. i will get my truck tuned soon, but i wanted headers and my Y-pipe first from him. ... also whats torque management, i read in super chevy that u shouldnt erase is with LS1 edit cause it could burn up your tranny???

 

I did have the false knock problem on my 99. I found it when I was dynoing one day. My HP and TQ curve dropped horribly at 4600RPM's. Plus the dyno numbers were embaraassing to me!! So, for starters I did some logging. Made a few WOT runs. I was seeing a max of 7.9* of knock retard all the time! I think my timing spiked and incredible 18.5*!!! I did a bit of searching and talked with HitMan and Parish8 about this. I was informed about the resistor trick. Soldering 2 10K Ohm resistors inline with each knock sensor. The sensor connector is at the rear of the motor under the intake cover. 2 small wires, cant quite remember color though. Cut, stripped, soldered in the resistors, melted some heat shrink tube and I was done. Did more logging and now I see around 26.5* at WOT and almost no KR! I may see as much as .3 KR. The resistors worked. I can still pick up knock even though the resistors are there. If you do end up finding that you are picking up false knock, give this trick a shot! It made a WORLD of difference on my truck!!!!!