Tuskyz28

If you look.at the intake/exhaust relationship on a LS3 head youll see why it suffers. People just talk/look at peak flow numbers when the real "sweet spot" on cylinder heads is 300-500 lift areas.... look how strong those numbers are on a aftermarket cathedral and you'll clearly see what im saying.
A motor doesnt stay at peak rpm for a long time (600-650) lift vs midrange (300-500) lift areas. Thats why when i see a AFR/TFS headed stroker with a cam to match in a properly setup F body.... 10s on motor is a walk in the park with a hydraulic roller. Not easily did with LS3 head.....

speedtigger

iTrader: (16)

I have seen you making these statements a lot lately. However there are many guys running into the 10s in stock bottom end LS3 and L99 powered 5th gens with bolt-ons and a cam. Those are fairly heavy cars too.

Tuskyz28

Okay.... they are fairly heavy. Is you talking 376ci or 416ci? Auto or manuel?
Its plenty run 10.7-10.9s with 6 speeds. I have yet to see one run 10.3s or lower without a solid roller, single plane intake, or a power adder? Not saying not none out there but im telling you from what i have saw/seen already.
Its one i know of on board here thats run 9.99 on the juice and 10.7s @ 126 mph on motor with the help of aftermarket LS3 heads and a Tony Mamo intake.....

speedtigger

iTrader: (16)

They are all stock bottom end cars. Most all automatics. Have a look at the Gwatney Performance stable. Several have come out of their shop. I think Pro Stock John keeps a list of 10 second Gen 5 guys if you want look into the combos.

JakeFusion

iTrader: (7)

As long as you have 4.065" bore for an LS3 head, it performs pretty well.

The issue is a lot of the 402, 408, 370 stuff is shrouding the valve and not getting the flow the LS3 architecture provides.

There's a reason a head/cam LS3 can do 500-530rwhp and 450-460/tq and a 402 with an LS3 doesn't hit the same number. Heads aren't breathing good and the cam in the 402 is probably way too big for the combo.

In fact, I bet if a lot of guys just did a 416 with a heads/cam packaged designed for the 376, they'd make the same 520-530rwhp, just at a lower RPM, but gain 40ft-lbs of torque. For most folks, that's a pretty fun street car.

I think LG did a few 416s with the G6X3 and AI LS3 Heads and it was like 530-540/510 or something. G6X3 is pretty tame in a 416 as well.

Tuskyz28

Yeap . Ive looked.... its cake to get a automatice car down the track due to the 60ft being critical period.
Here is what i guess you are referring too.

https://ls1tech.com/forums/gen-5-camaro-racing-tech-results/1809394-10-90-125-1-47-h-c-i-gear-converter-slicks.html

speedtigger

iTrader: (16)

Johns car is one example, but he is not the fastest.

SoFla01SSLookinstok

For the op. Looking at the wheel speed on the chart I'd say you have 28"-29" wheels with 2.73 gears? Or it was done in overdrive? Wheel speed gets up to 220mph. What wheel size/gears do you have?

SoFla01SSLookinstok

Ah, I see kph down there.

Tuskyz28

Here is what I digged up...

Naturally Aspirated-Only List (Heads, cam, stroker, plus bolt-ons)

1. DietCoke- 10.47@133.35 mph, (430ci LS3, 4l80, Converter, LS7 Heads), (430ci LS3 based, 4l80)
2. Rhino79- 10.75@126.33 mph, (Cam, LT, UDP, Converter, Gears, ported Int/TB)(L99, A6)
3.TEKHOMBRE- 10.83 @ 128.48(Heads, cam, Underdrive, CAI, 90mm tb, Fast 102, Slicks,4:10s)
4. trw427ssrs- 10.93 @ 126.86 mph (LT, CAI, U/D Pulley,Ported TB, Cam, Ported Heads, 3200 Converter

speedtigger

iTrader: (16)

I am not sure where you got the "low 10s" statement. I never said "low 10s". I merely said "10s". Specifically, I said 10s with cam and bolt-ons.

64post

iTrader: (5)

And the Cathederal vs. square battle rages on. All good stuff though.

Bowtiejoni

Driveability is everything, cant wait to get my cam from you.