Ksths2

iTrader: (1)

I've got an 01 LQ4 & originally was going to use the stock truck intake for ease of not messing with any accessory changes etc since i've got room under my hood for it.
But i've got a set of stock 241 LS heads just sitting on the shelf along with a LS6 intake i'm wondering would it be worth installing it on this LQ4???
I'm planning on doing a cam change mainly to get more power out of it but still want to get good mileage since this will be a crusier swap not performance (54 Ford) but now is the time to change this stuff.

My main question is,
1) what all do i need to get my LS6 intake to fit on my LQ4?

2) would it be worth installing the 241's on it to raise the compression since the stock 317's are 9.4:1 w/ the dish pistons

3) Would the stock truck intake be ok with a better cam change? Ex: GM hotcam 219/228 .525/525 w/ 112 lsa??? or would it choke it in high rpms?

Ksths2

iTrader: (1)

I found out that the heads on the 6.0L are the 12562317 heads that are the standard 2.00/1.55 valves but the port volume is 210/75 w/ 71cc chambers & my 241's are the same valves but 200/70 volume with 66.7cc so since the bigger 4.0" bore i'm assuming the better flow would be better than the added compression??

spacemanspif

iTrader: (5)

For just a cruiser swap you will probably enjoy the better torque of the truck intake than the high RPM horsepower of the LS6 intake. LS6 looks cleaner but the truck one can be made to look pretty good if you put in the time. Plus, you can sell the LS6 intake and heads and use the money to buy a Z06 cam and springs to up the power or put it back into the "swap fund" for later use.

Ksths2

iTrader: (1)

yeah i agree, I was hoping you were going to say this exact thing lol

Would that cam though still work good with the truck intake at higher rpms?

And I'd still like to know what it takes though to swap to the LS6 intake.

Thanks!

psiconversion

iTrader: (5)

From a wiring stand point, the LS6 intake will require injector connector change and relocation of MAP sensor connector. Accessories will need to be changed, although I think someone has a work around on that.

Jon
PSI

garys 68

iTrader: (1)

Is the LQ4 DBW or DBC?
There are a couple ways to put an LS1/6 intake on it.
Top: LQ9 with LS1 intake.
Bottom LM7 with LS1 intake.

Ksths2

iTrader: (1)

yep i'm aware of the injector wiring & map but i'm more concerned with the water pump/accessories/balancer etc.

Cool pics! did you make all the brackets Gary? Looks good! What water pump & all that did you use?

Thanks guys!

spacemanspif

iTrader: (5)

You can use an F-body water pump and get some spacers to bump it out a little. Think they are on E-bay and come with 2 more gaskets. I think this is the easiest way of converting because you don't have to modify your truck pump. When sticking with the truck accessories and the car intake the alternator sits higher than the intake which might not be to taste.

flywheel

iTrader: (2)

I have an 03 lq4 in my 71 velle. I only changed the cam/torque conveter. The cam is a TR w/.594/.602 lift and it made 391hp to wheels thru a 4l80e tranny, so the trk intake will be just fine. Tho a cover onthe intake and some Holley coil covers an you'll be jus fine....
Rick

garys 68

iTrader: (1)

That's an F body pump with a truck pulley and spacing. Spacers work fine too. One AC bracket is home made, the other is Kwik. Alternator, one home made, other is minor mod of the truck bracket.
Early truck injectors wull work on the LS1/6 by removing the plastic tip. Flex fuel injesctors are a direct fit. They will require the truck rail or aftermarket but will retain the original harness.
DBC TB or 07+ DBW TB will clear the L92 water pump with truck spacing. You'll need an L99 or modded f body pump with other TBs.
You'll also need to mod the alternator idler bracket and the TB water passage.
You can clip a couple tabs off the MAP.

Ksths2

iTrader: (1)

hmm very cool info!

Thanks "flywheel" for the info w/ using the truck intake as well, what's your get for mileage? It is one of my goals to get the good mpg with a cam swap.

Hey Gary, sorry i just saw you asked me a question, my LQ4 is DBC. Thanks again

psiconversion

iTrader: (5)

Just an FYI.... that Water Pump Pulley is a BEAR to get off. Gary did you do anything special to get your's off?

Jon
PSI

garys 68

iTrader: (1)

The truck pulleys come off easy with just a 3 jaw puller.
The LS1 requires notches to get the 3 jaw puller on it, then I use a cutoff wheel to slit it up to the shaft to make removal easier.

Ksths2

iTrader: (1)

I know what you mean, I noticed that it looked pressed on. You must have a huge 3 jaw puller to get over that big truck water pump pulley!

garys 68

iTrader: (1)

I'm sure you could make a jig to remove it quickly with a press. But for the 2 or 3 that I'll need, I dont mind spending 15 minutes removing one with a puller.

flywheel

iTrader: (2)

Iv tested the gas milage 3 times so far. Got 14,16,18mpg when tested. 14w/ lots of heavy pedal, 16mpg w/ less pedal and more hiway, 18mpg most all hiway and easy pedal. running 3.55 gears w/ 26" tall tires. Not great, but better than my 66 w/454 5sp.
Rick

Ksths2

iTrader: (1)

yep i understand, i was hoping it could get 20+ when its all said and done.

My 02 Vette 450+ n/a 346ci w/ a 3.90 gear gets 20mpg on highway still & it has a real nasty cam in it.

Thanks!