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I'm hoping some of you guys can help me out. I have a 1999 ecsb with a 4.8 thats about to turn into a grenade! So im gonna do a 6.0 and have have a couple local to choose from but im not sure what year i should be looking for. Any help on which direction i should go would be great.
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Originally Posted by Silverado889
99-02 is DBC which will be compatible with your current setup.
03-0x will DBW which you will have to purchase the Tac module and pedal for DBW
05-0x you would have to make provisions for Efans since those motors will not have a mechanical fan
If it was me, I would reuse my old harness and throtle body (if going with 03 and newer) and it will be easy as cake
Shortbloack? Longblock?
LQ4, LQ9, LS2......
need more info......
Lq9 has higher compression (flat top pistons) and only likes high octane fuel. The LQ9 can be found under the hoods of Vmax's and SSS's.
The LQ4 is an almost identical truck motor with lower compression (it has dished pistons). Its used in 2500's and will run on low octane. Imo, unless you are going to run a considerable cam the LQ4 is the best bet.
So you think going with an 03-04 lq4 is the way to go? its not a daily driver so i will be putting a healthy cam, LT's, etc in. I just dont want to get a motor that has is going to be a pain versus a year newer that will almost drop rite in. ThanksQuote:
Originally Posted by jtaliaferro
Quote:
Originally Posted by Silverado889
With your harness, throttle body and computer it will be a direct replacement.
Quote:
Originally Posted by Silverado889
i have a 99 ecsb that had a 4.3 now have a 04 lq9 (excalade) dbc since you have a 4.8 dbc youre good to go, not much more needed except for a tune... all your accessaries will bolt up. even intake.
Well I guess i'm on the hunt for a 03-04 lq4 or lq9 then. Of course the three 6.0 engines that are local are 01-02. I can get one for $700, is it worth the hassle or do i wait it out for a 03-04. Thanks guys I really appreciate the help!Quote:
Originally Posted by skeet
I'd get an 05+ LQ4 if you can. The 05 and up motors have the stronger LS2 style rods and timing chain. If not, any 01+ LQ4 would be fine as long as it wasn't abused.
None of this matters....he can reuse his original accessories, throttle body, intake manifold, etc and not have compatibility issues.Quote:
Originally Posted by jtaliaferro
Thanks! One more question. I can't find an lq9 anywhere around here (NH), but i found 2 04 lq4's. One for $1250 with 61,000 and 1 for $1150 with a little more mileage. Does this sound about rite? If it does i'll pick it up tomorrow. then i'll be ready cam and tune suggestions. Thanks again!Quote:
Originally Posted by thunder550
Sounds about right to me. I paid $1800 for my LQ4 a few years back, and I just had a buddy get one for his GTO back in January for $1300 with 65k miles.Quote:
Originally Posted by Silverado889
Thanks for all the help guys! Looks like i'll have a 04 lq4 tomorrow.
is there anything that I would need different to do this on an 04 with a 5.3, and would an ls2 short block pretty much slide in using the 5.3 heads?
depends on if it has the 52x relucter wheel or not. If it does you'll have to tear the bottom end out and swap relucters wheels to the old style. You'll also need a couple extension leads, one for the knock sensors and the other for the front mounted cam sensor.
this is probley a newb question but im going to ask anyway. i have a 02 1500 with a 4.8l i want to swap in a 6.0l. what will i need? to make it run. computer harness what is needed and what can i use off the truck i have. what year 6.0l should i be looking for to make the swap eazy on the wallet
you will use all your existing accessories and harness. You will need a new tune for the 6.0.
Nothing special, just be sure it comes with the injectors. Swap engines and order an tune for your truck converted to 6L. Be sure to give the PN on the injector to your tuner so he'll know what size you're running. All parts that are on your 4.8L will transfer over to the 6L, even the intake and exhaust. I find its usually easier to swap the whole intake over from the 4.8 to the 6L than it is to swap parts. You will have to pull the fuel rail off and swap the injectors but thats so simple even a caveman can do it. :thumb:
im better off find a complete motor instead of a long block. what year6.0l do u recomend? im going to do a cam and bolt ons.
how can u tell what kind of 6.0l it is? does it say lq9 or lq4 any where on the motor
[QUOTE=green440;168982]how can u tell what kind of 6.0l it is? does it say lq9 or lq4 any where on the motor[/QUOT
LQ9 has flat top pistons, I have been told that's the only way to tell.
Pull a spark plug and roll the piston around up to where you can see it and look for a dished piston if you want an LQ4. If you have a bore scope its much easier to look.