carvz

I start this thread in the wrong place,

I just finish my l92 based engine, is a stroke 416, 4.07 bore x 4 stroke, ported l92 heads with stock size valves, carburated with a gmpp intake, patrik g custom hydraulic roller cam spec, and old proform body 750 carb, and step 1 3/4 to 1 7/8 headers, running the dyno with accessories water pump and alternator, because don´t have the electric water pump,

engspd - stptrq - stppwr
rpm ---- clb-ft -- chp
5100 --- 594.7 -- 577.5
5200 --- 588.4 -- 582.6
5300 --- 580.9 -- 586.2
5400 --- 584.6 -- 601.1
5500 --- 593.2 -- 621.2
5600 --- 580.3 -- 618.7
5700 --- 567.8 -- 616.2
5800 --- 562.5 -- 621.2
5900 --- 567.3 -- 637.3
6000 --- 558.2 -- 637.7
6100 --- 542.1 -- 529.7
6200 --- 533.2 -- 629.4
6300 --- 524.2 -- 628.8
6400 --- 530.2 -- 646.1
6500 --- 521.3 -- 645.1
6600 --- 515.6 -- 647.9
6700 --- 509.3 -- 649.8
6800 --- 491.0 -- 635.7
6900 --- 482.7 -- 634.1
7000 --- 468.2 -- 624.0

avg: 544.8 trq, 623.5 hp
max 594.7 trq, 649.8 hp

Pwebbz28

iTrader: (31)

Very nice powerband! What's it going in?

danf1000

iTrader: (2)

that's big time. running a 416 here. whats the cam specs? 230 deg plus??

carvz

is going in a all steel 1974 nova with a transbrake powerglide, 4500 coan converter, dana44 rearend with 4.27 gear, 28x11.5 slicks,

the cam is 239/251 .624”/.624” 111LSA

LS6

First of all it is impressive

That means 552 rwhp....


Congratulation

Can you share with us the detail if it permits...

Thanks...

87silverbullet

iTrader: (11)

That is close to what Texas-Speed did here with EFI.

https://ls1tech.com/forums/dynamomet...o-results.html

carvz

sure, what did you want to know??????

L92 bases engine, high ported heads with the stock size valves, patriot gold springs, retainers, locks(have to upgrade that) heads flow:
- lift ---- int --- exh
0.199 - 184.5 - 138.1
0.300 - 247.4 - 168.8
0.400 - 319.5 - 196.0
0.500 - 347.8 - 217.2
0.550 - 366.5 - 226.0
0.600 - 378.6 - 233.1
0.650 - 388.2 - 237.7
rotary is compstar 4" stroke crank, scat 6.125 h rods, srp flat pistons, custom cam specs from patrick g, gmpp intake, msd 6012 control,

L92 engine $1,000.00
block work just hone to 4.070 $100.00
heads (port, valves, springs, retainers, locks,) $1,000.00
rotary (pistons, rings, crank, rods, bearings) $1,850.00
balance $150.00
ls2 timing cover with sensor $100.00
gmpp intake $350.00
msd control $350.00
intake and heads gaskets $250.00
custom cam $450.00
gmpp lifters $250.00
timing chain $150.00
its about $ 6,000.00 dls + the build is doing in home

Jimbo1367

If this head porter did this with a CNC program (repeatability) he could have a killer head package. How big did he have to open up the heads though? (combusion/intake-exhaustport)

Any dyno numbers lower in the RPM range?

87silverbullet

iTrader: (11)

Need an update on this. Did you get it in the car?

I am building a setup similar and Geoff at EPS spec'd me a cam close to yours.

Cliff

iTrader: (19)

You have some crazy flow numbers for a set of stock valves. Are the heads CNC'd or hand ported? I really have a hard time believing you can reach those numbers.

topbrent

iTrader: (1)

Impressive combo.

Did you get any dyno numbers at lower RPM's?

Any more details on the heads?

TurboAv

iTrader: (6)

He's using a 4500 converter. It's not going to matter much.