fst100

iTrader: (5)

Don’t know if this is the correct section to post so admins please move to correct section please. im currently planning on getting a LQ4 from an 01 silverado. My current 98 LS1 motor blew a rod and a hole through the block. My good friend is going to be doing the swap as well as a cam swap. I already have LS6 intake manifold and SLP LT headers to swap over to the LQ4. I understand the wiring is all interchangeable as well as the knock sensors. does the LS1 fuel rail/injectors fit on the LQ4 at all or would need the LQ4 fuel rail as well?

My main question is deciding on what cam to go with. since the LQ4 is a lower CR than the LQ9 I was thinking about going s/c in the future but not right now. Tranny is a 4L60e with a 12-bolt Moser. I do want the whp to be in the neighborhood of 380-400whp N/A. is that possible to attain and if so what are some good cams out on the market? I also believe I should run no lower than a 113 LSA on the cam to be able to run FI correct?

PREDATOR-Z

Yes all will swap to the LQ4, if from same generation. Choose the cam according to your FI future needs. Like a 224/230 114 LSA. You can't have both worlds so forget about certain Hp levels N/A. Just build it for your final plans, it is cheaper.

fst100

iTrader: (5)

thanks for the info predator. doing some research and seems few are running on teh stock LQ4 motor with turbo setup on 12-14lb safely and making some good power. im moreso thinking about going s/c instead of turbo, maybe in a D1SC setup. i'll have ot venture into the FI section and do some more research or throw in a mild boost cam for the time being then invest in a D1SC or find a cheap turbo setup in the classified.
thoughts?

PREDATOR-Z

For boost; safely, I would not go over 10 lbs and that is meth injected. Properly tuned and fueled it should last awhile.

fst100

iTrader: (5)

^meth injected only or meth+intercooled?

PREDATOR-Z

meth+intercooled

fst100

iTrader: (5)

well if i go cam only and stick with the stock heads i notice alot of guys going with TR226 or 228 or comp custom grind specs but within the 23x/23x. i do want to stay under .6xx for the duration to prolong spring life(would go with dual springs anyways). prolly not going to FI as i've been there before in a v6 and theres always more maintenance and something breaks down.

so now im thinking of going N/A but want something with some lobiness as well as midrange-topend power. would something like a 230/232, .590/.595 and something like a 112 or 113 LSA exist/work? going to plan on getting a 3400 stall as well.

thoughts and/or suggestions on cam choices?

PREDATOR-Z

If you are going to stay NA, then you might want to consider raising compression.
This can be done in various ways:
-Mill heads = small cam
-Mill heads+ flycut= bigger cam
-Change heads= 243/799 or ported 5.3s
-Change pistons to flat tops

fst100

iTrader: (5)

thanks for all of your help and advice predator. one last thing. if i decide to go cam only for now and in the future find a pair of 243/799 heads, what cam would be alright for now to be able to compliment the 243/799 heads in the future? i know alot of "what if's" but im trying to get all my ducks lined up. if i go with a TR228 then can i be able to upgrade to 243/799 heads without need to either mill the heads or change pistons?

PREDATOR-Z

Yes such a cam does not present any issues with PTV unless heads are milled a bunch. Being a no split cam, it is a good one since it promotes higher cylinder pressures and good midrange trq.

fst100

iTrader: (5)

what does PTV stand for? lol
so the TR228 would be a good choice NA and then be able to upgrade to 243/799 then... :-)

thanks!

PREDATOR-Z

PTV=Piston to valve.
Yes it would be a suitable cam for the LQ motor.

fst100

iTrader: (5)

still shopping on a cam aside from the 228R and my buddy/installer mentioned to look into a lunati cam. he mentioned the one in particular has something just under .600" and around the 230s duration. so i went on lunati's website and found the closest one matching that description and found a voodoo cam 282/288 with these cam specs:
Advertised Duration (Int/Exh): 282/288
Duration @ .050 (Int/Exh): 232/238
Gross Valve Lift (Int/Exh): .599"/.601"
LSA/ICL: 113/109
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2400-7000


has anyone ran one and if so what are your thoughts? the LSA is 113 so its still suitable for boost and the lift's under .600" so i can still run double valve springs and not worry about replacing them often. it's a bit more aggressive than the 228R and if its doable for the LQ4 project then i'll go this route. just want some feedback :-)

dodson55

iTrader: (18)

you could use it but i dont think it will be the most boost friendly because of the 113 you need a 114-116 for boost in my opinion also when doing the swap dont forget to use your 98 cam sensor it is different then 99 up

fst100

iTrader: (5)

thanks dodson55...i think 113 is the lowest to go if going boost. my installer will most likely swap everything from the 98 motor over to the LQ4 so i trust in his abilities.

dodson55 what cam is in your LQ4 that has 233/239 duration and how do you like it? i particualr like the 123mph trap speed. if anything depending on the cam and specs i may just stay NA and since im running a 4L60e i know the trap would be lower compared to the 6speed.

fst100

iTrader: (5)

just a bit of an update. dropped the heads to a local machine shop to do a pressure/leak down test as well as clean the heads and do a 3-angle valve job as well as install a set of lunati .650 double valvespring kit. also sanded down and removed as much loose casting paint on the block as possible and sprayed a few coats of hi-temp primer gray paint. got my cam, 7.40" push rods, ls7 lifters sitting and ready. only need now are the ls2 lifter trays, ARP head bolts and oem gaskets and then off to my buddy's to do the cam and motor swap.

i havent dropped the pan yet but will do so when the motor's taken to my buddy's garage.
http://s99.photobucket.com/albums/l2...9090845537.jpg
http://s99.photobucket.com/albums/l2...9265560772.jpg

Gunslinger09

You can also swap your Ls1 heads over to the Lq4 to bump your compression. Have them ported and a valve job done on them. I think with the smaller chamber Ls1 heads your compression should be right at 10:1 and you shouldn't have the PTV issues like you would if you milled the crap out of the stock 74cc heads from the Lq4.

fst100

iTrader: (5)

Gunslinger09-i was thinking about bumping the CR up but im going to retain the low/stock CR as i plan on going FI in the future

TermnEatr

iTrader: (24)

I'm selling a forged Lq4 longblock 9.5.1 cr great for a blower lmk if u interested

fst100

iTrader: (5)

TermnEatr-i just picked up one a couple weeks ago and am in the process of building it up.