stangbeaterz28

iTrader: (6)

2003 6.0 LQ4
317 aluminum heads
Comp Cams XER 609 605 lift 238 240 duration cam, Patroit 660 lift springs
Edelbrock Victor Jr. intake
750 holley carb

I ran across a interesting set-up i have been questioning for my 98 Z28 ^^^

My car is a 98 Z with a M6 tranny, 4.10 rear.
Motor is currently out.

What can i expect for power through long tubes and 3" x pipe? How i can i expect it to drive?

I do not know much about carb's but think this might be a unique set-up and learning process. So anyone who has a simiar set-up please donate two cents

Dickie-311

iTrader: (1)

not my car ..but someone i know has about the same combo as the motor your talking about .. with a much smaller cam , and 3600lbs , he drives his car all the time and runs 12.0's

Ravenous T\A

iTrader: (12)

I like mine, I can do all the tuning myself and dont have to worry about sensors going bad or out. But I think u may have emissions issues depending on your state laws, I avoided all that by using a 1970 model

stangbeaterz28

iTrader: (6)

i know a guy real well that owns a shop so im not real worried about legalities at this time.

With my current set up im in the 11's now. the cam in this motor is very similiar to my MS3.

After tossing the idea around a friend through out the idea that i may also be able to use 2 different carbs, one mild set up for street driving and a more extreme set up for when i get to the strip (maybe e85). I know we have switched to the e85 set up on the late crate dirt cars with just a carb swap. does this sound feasable on something more modern like the lq4.

And on another note, the 317 heads only run about 9.5:1 compression (correct me if im wrong) with stock pistons. Would my 241 heads work on the lq4 and bring my comp back up to 10.5?

NemeSS

iTrader: (127)

can mill 317 and thinner gasket will get to 10:1, if staying with unported heads, dont use anything less than a 243 or 799. anything else is a downgrade from 317. flow wise. that cam need at least 10.5 min. scr.
750 holley street hp or pro series will make for excellent match full time without need of secondary carb.

stangbeaterz28

iTrader: (6)

I will keep in mind.

Would ya'll trade a

01 ls1 with 241
ms3
all supporting mods (ALL)
Arp rod bolts
ls6 intake
stock fuel
jantzer custom TB

i have it ready to go into my car right now
it sounds like i need more compression if i were to go with this lq4 carb set up. So i might be alble to swap heads with the guy as well.

Would this be worth it???

I drive the car alot but have a truck too. I want a driver that runs 11's on pump gas all day. WILL THIS GET ME THERE??? How would something like this fair on say 2-3 hour trip?

Thanks for the advice
-Bill

waldo71nova

Hi,i have the exact set up in my 71 nova 6.0l out of a 2005 truck 317 heads,same cam you have and an AED 750 carb took it out to the track and made 3 passes and spun and had to get out of it each time then hit it again and ran 11.61,11.64.11.90 my 60' was so bad so i have it in my shop pinion shims will be intoday and insatlled tonight,oh and i have a 4000 stall with a turbo 350 trans will run 11.00 or teens when i get it to hook,so i would no worry about other heads and thats on regular pump gas

the_merv

iTrader: (88)

I would bolt a LS6 Intake on it and make it EFI..alot easier to work with and you will keep the clearances in the Engine Bay. Just my opinion though..

ramdaspadhye

iTrader: (3)

Can always go with 5.3 heads and have em milled to 59cc chambers and CNC'ed at TSP... They flow as good as the CNC'ed 243's then

stangbeaterz28

iTrader: (6)

I already have a ls1 set up with a ls6 and FI, the whole point ofd this would be to go to CARB for something different. I have a 4 inch cowl hood on now, i think i should have good clearance.

So with the 317 heads my scr wont be too low? I know i bleed of compression now with my cam so i cant imagine what i would lose with 10.5.

As far as wiring goes, im assuming ill delete my AC (!EGR !AIR already done) but where do end the wiring? The harness leads into the interioir behind the PCM. what stays and waht goes??

ramdaspadhye

iTrader: (3)

Again, compression makes a huge difference on these motors. I would seriously consider ditching the 317 heads since you have an LQ4 and bump your compression. Either get 243 heads and have them milled or get you some 5.3 heads, have them milled to 59cc chambers, and cnc'ed... Contact TSP, but I think it's around the 600 dollar mark to have them cleaned, milled, CNC'ed, and reassembled to spec.

stangbeaterz28

iTrader: (6)

If i were to go through all that trouble i would call up Tony at AFR and get a set of 205, milled and ported for the cam spec. That or the 225 which i believe are better on the larger bore lq4.

Im trying to spend as little money as possible, my budget is tapped on the motor i just built. So i think buying a set of heads is out of the question.

IF I COULD TRADE THE GUY HEADS... would my 241 casting be better than the 317. Basically is the compression gain worth the flow loss.

the_merv

iTrader: (88)

Ya..sounds like it will work..

stangbeaterz28

iTrader: (6)

how streetable will the carb set up be, and how would it fair on say a 2-3 hour trip? (college buddies)