79buLS

I am looking at building a 6.0 motor that will be an NA combination, and basically it is a max effort. This is a drag car and only a drag car set up. The Rules I have to follow are factory stock crankshaft, factory untouched heads, 950 max carb, weight of the car will be minimum of 3200 pounds.

I am looking at running 10.20's. a little background on previous set up. I took out a LS1 that was stock bottom end with untouched 241 heads (besides the 660 springs) the camshaft was 232/238 595/605 @110 the motor was on Alcohol with a 650 (yes a 650) QFT, packed all the lead and weights I had to get the car to weight 3167. Car went 10.87@122. This was with a Powerglide 1.76 first gear, 5200 stall, 4.56. Car had a 1.51 60ft.

So I am looking to pick up around 6 tenths.

At this time I have the following parts laying around that could be used.

2005 6.0 std bore block with good stock crank and floating rods.

243 heads untouched/with 660 springs

BTR Stage 4 camshaft that is 235/242 621/592 @111 +3

Victor Jr. cathedral intake


I was mulling it over about swapping out the heads to a square port style, I would have to buy the heads and intake.

I will buy a different camshaft if needed.

I will be running the motor on Alcohol with a 950 QFT.

The headers are 1.75" tube

Trans will be a TH400 with brake (switching out from the glide)

Converter is a PTC 5200 (well it flashed at 5200 with the LS1)

Rear gear is 4.56

28x10.5 slick

Car will weigh a minimum of 3200. (I'll have to pack weight on the car to get it there but that is life).


Can 10.20's be accomplished with cathedral untouched heads or is it money well spent to go square port heads and buy a new intake?

Anyone out there running the low 10's on ALL motor weighing in the neighborhood of 3200 pounds?


I am open to suggestions, BUT I have to follow the rules above.

tech@WS6store

iTrader: (2)

That cam would be fine either way on cathedral or rec port.
Can the heads have stainless valves or a valve job?
What pistons are you lookin for forged or hyper e?
We have both.
Let me know a little more and we can get you set up.

79buLS

I could run stainless valves and yes I could do a valve job on the heads.
I was going to just run a hyper flattop since this won't see a bottle or boost.

tech@WS6store

iTrader: (2)

We have some very nice floating pin hyper e pistons WITH hard anodized top. Made for a stock rod gen3 or gen4 either one. And our LEADFOOT stainless valves would work well too and keep a good budget.
Economical and easy to get.

79buLS

shoot me a price on the pistons if you don't mind.

tech@WS6store

iTrader: (2)

Pistons and rings are $330 shipped.

fast89stang

iTrader: (2)

My car is lighter for sure, but I've had a few combos. !st combo was 6.0, 823 milled 020 heads, vic jr, 950 carb, 5500 stall ,pump gas @2935 lbs. When the car was running VERY bad with junk carb problems, it went 6.54 in the 1/8 and 10.08 in the 1/4. I had a aluminum 6.2 after that with milled 050 heads, custom cam that went 5.97 in the 1/8, never ran the 1/4, but I think you see the potential. That was at about 2800 lbs. Now, we swapped in my buddies 5.3 with 13.5-1 comp, 243 heads custom cam, on alcohol with super vic, everything else was the same, weight was down to 2755.It ran 6.13 to the 1/8. The heads on his 5.3 are untouched(it is bored to a 5.7, still less cubes than your 6.0) although they were milled. But I think you should achieve that 10.20 goal easily. The right cam will make it. I love my 823 heads, but after running his 5.3/5.7 motor, I believe that cathedrals can be a strong performer.

fast89stang

iTrader: (2)

side note tho, that's a awful lot of str for that tire and the power you should make. Hope track prep is good and suspension is set up well. I have 4.30, and a radial. I have to stay on top of my suspension to make good passes.

79buLS

Thanks for the info, I appreciate it.

I was hoping I could get to around 10.20 with my LS1 with a 243 head on alcohol. I get a weight break, have to weigh 3100.
I have the 6.0 together already unran, BUT it is a dish piston motor with a set of 243's (untouched) and a BTR stage 4 camshaft.
I hated to pull it apart just to put a flat top in it.
I have another 6.0 I was looking at building with square ports.

How did you get the 13.5 compression on the 5.7 set up? were you running a dome piston?

fast89stang

iTrader: (2)

Big dome and milled to 56cc heads.

helicoil

iTrader: (104)

I am doing a 365 right now (iron LQ9) with a Nascar truck series 799 spec cathedral port CNC'd 229cc heads. These have Ti valves. Running a 9cc dome Wiseco with the 62cc head and positive deck clearance.

Cam is a solid roller roller Cam Motion LLSR 249/257 .680" 108lsa. Super Victor with an ethanol 850 QFT carb. Comp ratio is 13.5:1

Car weight is 3300#. TH400, 5200 stall, 4.11 with a 275 radial. I am hoping for 10.20's-10.30's and 625HP-640HP @ 7400RPM and go and get some ice cream from time to time. :-)


Did one of these once before with a smaller cam (upper 230's LLSR), 243 heads, pump gas, Vic Jr. 11.1 and dynoed 588HP. Ran 10.7 in a 3300# 8.5" tired Nova with a tight 3200 stall with 1.49 60'

Bowtiedford

iTrader: (9)

I would go LS3 heads and a lot bigger cam then what you mentioned 79buLS, like what helicoil mentioned. I also run a LLSR from Cam motion, and it's only about 650 lift and my new cam will be 680ish lift goal is 9's NA in a 3100 car with ac

Nickelndime

I have a 3020 lb Camaro that runs 6.50's in an 1/8 mile, never ran 1/4 mile but calculator shows 10.30 fwiw. Combo is a completely stock long block Lq9 6.0 with 10:1 compression on alcohol, 950 cfm carb, cam motion junkyard dog cam, super Vic intake, btr springs, glide trans w/ ptc converter and 4.88 gear.