AU N EGL

Seems like a well built 430 fwhp / 370 rwhp LS6 or LS2 motor would be a good option for many guys.

LS6 blocks are almost if not history but LS2 engines with 243 or 799 heads, light wt valves, better valves springs.

Accu-sump or Dry sump Ready.

No real fancy parts just good solid reliable parts and build.

Could be a market ( hint hint )



IF LPE can build ASA engines . . .

RAFTRACER

Inverting your hp/tq #'s would be better

mgarfias

He said flywheel and rear wheel. Not hp/torque

Jaymz

I think Danny meant to say that the new standard will be 370 hp and 430 tq

travisnd

Great... now a stock LS6 won't cut it... more reason for me to stay in TTA/PTA

redtopz

Cam swap.

travisnd

A nice torquer cam and some long-tubes would help, but won't hold a candle to the detuned strokers some well funded camps are beginning to run

throwit

Are the ones that are still around in higher demand and in turn more valuable than an LS2/3?

drivinhard

with a close ratio box, it won't matter THAT much IMHO. The min RPM the engine sees will be much higher than our crappy boxes, and it would be in the range that you'd be pulling the throttle blade back on a big motor anyway.

sperkins

I sure hope so.

L98Terror

We haven't seen it yet, a stock LS6 does a pretty damn good job, now a new crate LS6 has had some issues. I think Alex blew his at Nats and Brownlows car was being pulled by AI cars down the back straight.

LS6 with 15k track miles= +5 MPH on the back straight vs brand new Crate LS6 engine. or maybe it was do to the fact we bounced the car off a concrete wall

PCHDrive

Hi,
If you would be kind enough to provide specifications for the motor you want I will pass it along to a machine shop/engine builder that I consult for. Perhaps he'll take you up on the suggestion to build some. He is a stand-up guy. He has built very reliable LS motors for a local drift car racer. His car is Blu808, google him to check him out if you like.
Thank you.

AU N EGL

Jaymz and Danny are right on.


We know the Approx HP and TQ levels desired.

RWHP is limited to HP:WT ratio of the Race class. 8.7:1

The base wt of the car is 3250 lbs with driver and fuel after a race.

Then build the motor to suit.

SO General thoughts are:

Lots of torque early on the curve from 2200 rpms on
7000 rpm ( maybe 7200 depending on parts) redline

LS6 block or LS2 block.
243 heads. Light wt valves ( Hollow and Sodium) SS valves are also not lasting for high RPM use.
Great Beehive springs ( double springs may have too much seat pressure )

LS6 Intake with a PP 75mm TB.

Coated bearings
Light wt but not overly expensive rotating assembly

Set up for Dry sump or Accu-sump.


Beyond that I can not say Use this Crank or that piston. Many great ones on the market.
Or use Cam X or Cam Y.

We do know that the LS3 block without the dry sump may not be the best option
or the LS3 block with dry sump may produce too much HP.

We know there are many great heads and Cams on the market and produce lots of HP. But again may be Too much HP for the race class.

For example:
Trick Flow 215 heads and right cam or AFR 210 heads and the right cam could push 500+ rwhp out of a 5.7 with good reliability. Sexy as all hell, and Great for sales and drag races but not NASA ST2 class racing. Too much HP.

Detunded stokers to get crazy torque numbers. with a TB plate and hole the size of a dime, to choke down the air for HP


Specific parts TBD

If Chevy could build 50 LS6 crates engines, they might be scooped up like a hand full of M&Ms


the Speed World GT race engines, the old LS6 or LS2 blocks. great race engines but still $15K each.

varkwso

A solid, relaiable and affordable 370/370 motor spinning 7000 rpm would be bought like LS6 crate engines were!

Jason

I'd take 2.

Falcon

According to the GM brass at VIR this summer, the LS6 isn't dead. They will build more when the demand gets to 60 or so units. From what I was told, that was the point where it becomes economical enough for them to build more and put them in the pipeline.

Is there someway we can gather enough orders through one dealer to trip that magic bar?

AU N EGL

I can twist some arms again. Getting one of the head honcho engineers to come to Raleigh in Jan for a seminar / talk for my local club.

0Louis @ LG Motorsports

whats the price point? 8k with LS3 drysump?

making 370 rwhp in anything today, is a chore. Stock Manual LS3 stuff makes 380-395 stock.

varkwso

Most of us do not want the weight and complexity (in comparison) of dry sump for an ST2 or PTA motor. An LS6 motor with headers can meet the 370/370. My last.crate LS6 was ~$3600 shipped. My last forged bottom end motor was ~$3600 plus my core heads, rods, crank, and block. So I think a forged LS6 would be in the range of $4000-5000 to sell well.

The LS3 and road courses do not seem to work without dry sump so it would be needed.

AU N EGL

Louis

That is why I mentioned the LS2 or LS6 block.

Dont think NASA is going to change the HP:WT ratio for the Super Touring classes.

and as Vark Mentioned LS3s dont seem to work well unless it has a dry sump, However, the HP levels are too high for ST2 / PTA classes.

Do have one other vender looking into this build. with a price cap of $4 to $6 K



Depending on parts that are available

LS2 short block, ( since LS6 short blocks are
243 heads, hollow and sodium valves with better valve springs then used in the LS6 ( 7000 rpm red line)
a torque type cam.
LS6 Intake with 75mm PPTB
strong timing chain with dampener