big hammer

Anyway I took it for a few mile drive, and made a 1/4 pass on a "closed road". Still having return to idle issues but darth is helping me get that worked out. Other than that, it cruises like stock even with 28's and 3.90's. Grab 6th and it chugs along at 60 mph like nothing has changed.

At WOT it's retarded. Handful on the street. I thought I was shortshifting it (because it was a new engine) but The logs showed I was shifting between 7500-7700. The powerband feels very broad and is boner inspiring. IMO this engine could easily swallow up more cam yet and still be relatively docile

64post

iTrader: (5)

Interesting take, Hammer. Most guys that build them realize half way through, or sooner, that it's not the best combination and will have some limitations.

Darth_V8r

iTrader: (4)

100% agreed!! Too many 383 where they took their LS1 top end and slapped it on

Dark Energy

I'll take you Young'ens back to Tony's old build 383. The hold point is getting the engine BUILT Correct and Having the Chassis Setup properly for what ever you do.

https://ls1tech.com/forums/dynamomet...-included.html

Or a basic as 346 that made over 510 rwhp Gotta build it Correctly is the whole point for the entire build not just the engine. If we're talking 1/4 mile or a drag setup,Corner carver...etc

https://ls1tech.com/forums/dynamomet...p-442rwtq.html

I also know of G. Good doing a set of Factory Ls6 heads on a smaller cubic inch stroker and it made power and was fast @ the track. Thing is: Being Properly Built and Setup. Or how about the guy with the Stang stock 6.0 370 with Ls3 heads running mid 9's with a hyd roller and pump gas N/a. It's all in the Details.

big hammer

"All in the details" is spot on

big hammer

There's a guy who made almost 800 hp with a stock cube 6.2 and ported stock ls3 castings. I think it PEAKED around 8300. 12.5:1 compression. Likely not something you'd want to drive around though

Dark Energy

Yea: ERracing. I built my FRH stage1 heads off ER racing with a solid roller just a 408. Good Friend & Guy! Got Darin Morgan to build me a set of custom ProComp castings Ls7 heads too High compression for that setup. Buying parts this month for it along with other things needed. It's all about what your wanting and who you deal with in any build.

I can say this: **** gets Expensive and I'm not rich. No 401k to take out just Hard earned Cash. Looking back I would have just built a simple hyd roller 408 with 600+ at the flywheel. Not this Crazy **** I got now, I figure you only live once and I'd be left Wondering what if I had done it this way.

big hammer

Darin Morgan knows his stuff.

Dark Energy

The young who asked what will it make? Compare your build to Navy's build both are basically the same. Add or Subtract depending on Cam diff. and Compression around 10 to 25 maybe even 30 hp. Ported intakes and vacuum pumps also help boost numbers. I'm thinking 680 to 710 and I don't have the basic spec's for either build. I'll take a look kinda busy right now.

big hammer

Lol when I seen navy's build I had to laugh. His build is quite similar. He had good results so that was reassuring. The two builds are completely unrelated though

Dark Energy

My mistake it made 727 with the Carb style intake and 690 with the Fast intake Ok so.Here's what we have:

Navy's 396" Details and it made 690fwhp

GM LSX Iron Block, Bored & HOT Honed to 4.175"
Callies Magnum Crank 3.600" with small 1.88" Rod Journals
Callies Ultra Billet I Beam Rods 6.35" with small 1.88" Journal.
CP Pistons with a 2.5 CC Dome, 1.10 Comp Ht.
(11.7:1 Comp) with Cometic .051 Head Gaskets.
.9mm,.9mm,2.0mm rings.
TFS LS3 Heads MAMOFIED
LLSR Cam Motion Cam 243*/249* (large bore lifters add ~2*) HR ~ 237*/243*
115* LSA + 3* Advanced, .679"/.645" Lift.
T&D 1.7 Rockers (measured @ 1.72)
Isky Red Zone Lifters with Bushing, NO needle roller bearings!.
(MAMOFIED FAST LSX 102 with Mid Length Runners to be installed
for next Dyno & in car) (C5, 1999)
Dailey Engineering Dry Sump System.
AMSOIL, Assembly Lube,Break-In Oil, & DOMINATOR 10W/30 Racing Oil.


And here's what the owner of the thread has.
4.125" x 3.622 bottom end

11.3:1 compression

Mast medium bore ls3 heads

Cam motion LLSR cam, 239/253, .680 lift on a 112

Fast mid runner intake

2" TSP headers and 3" duals

I'm thinking at the flywheel you'd make 650 to 630. The dry-sump and ported intake are what helps make more hp. The couple of degrees on duration may add a little but the parts listed was the thing that helps. You should make over 550 rwhp with a manual.

Navy there's nothing like a pair of $1k lifters LOL! I used Morels same style lifter.

big hammer

I wonder if navy has flow numbers for his heads

NAVYBLUE210

But off course! LOL
Flowed by Tony on 4.155 Bore Fixture.

.300" 238 185
.400" 302 228
.500" 350 243
.600" 386 255
.650" 389 260

big hammer

That's some badass hardware right there! Do you know where your port CC ended up?

NAVYBLUE210

To quote the Late, Great, John Lingenfelter
"Great Cylinder Heads with a so so Cam
Will still produce good engine results,
So so Heads and a great cam will provide
So so Engine results."

I am NOT saying Hammers cam is so so by the
Way. Both of us have GREAT Cylinder Heads
Which on a 4.125" or larger Bore combined
With LLSR and the ability to spin 7500-8000
RPM provide phenomenal power over a
4000 RPM range. I would estimate
650-660 HP @ Crankshaft, 590-610 RWHP
Depending on driveline efficiency and the
Little details.
Enough Power for low 10s maybe top 9s
With suspension, tire, and practice.

NAVYBLUE210

Just under 260 CCs

SoFla01SSLookinstok

Just checking things out on the calc it looks like more gear may be needed. Which of coarse are not exact. On that 28" tire, revving to 8000, it looks like 4th gear will pull to over 150mph. My guess is 135+mph in the 1/4. Smaller tires may help a bit but you may not want a smaller tire. Still. A new ball game.

NAVYBLUE210

Our Heads on a 4.125" Bore or larger with LLSR 239-247*Intake Dutation
With a + 6-14* Exhaust Split .650-.700" Lift (112-115LSAs) and the
FAST Mid-Length Runners will provide excellent results. On the larger end
Or bigger the short race runners will peak 600-800+ RPM Higher if you
Want to spin 8500-9000 RPM LOL (with 3.625" strokes) 4.00" strokes
Subtract 800-1000 ish RPMs for peaks.
Spit ballin with the strokers lol.

big hammer

I'm hoping for 600+ with broad hp across the top

big hammer

Oh yeah I have a 9" coming with 4.56's. With the 3.90's and 28's it's geared for 160+ mph lol