Hey everyone, I am going to the dyno with my fresh engine on Monday, and I just thought that I would post up and see who can guess the closest to the actual numbers. Here is a bunch of info on the car:

It will have 1000 miles on it at the time of the dyno.
Forged Eagle 3.75" stroke crank
Forged Eagle ESP 6.000" connecting rods with L19 ARP bolts
Forged JE/SRP pistons with floating pins, -16cc dish
SRP ring set
Clevite 77H rod, main, and cam bearings
Pro Gram Splayed caps with ARP studs
Deck block (pistons .020 in the hole)
Overbore and hone (4.030")
LE2 cam
LE2 Heads
LE Ported Intake manifold
Ferrea 6000 2.00/1.56 valves
Comp 987 double springs
Titanium retainers
10* super locks
CSI (CSR) electric water pump
March 2 pulley underdrive kit with proper belt
FMS 30# Injectors
TPiS Adjustable Fuel Pressure Regulator
DMH Electric cutout
TPiS 52mm throttle body
TPiS Air Foil
Comp Cams 1.6 Pro Magnum full roller rockers NSA, 7/16" stud
ARP 7/16" rocker studs
GMPP guideplates
Custom length hardened pushrods
GM Impala Headgaskets
New GMPP lifter kit
EX Components double roller timing chain
Jet-Hot Longtubes
Custom 3" into a straight through magnaflow
BMR Boxed Subframe Connectors
BMR Weld in Relocation Brackets
HALL MOTORSPORTS dual adjustable rod end Lower Control Arms
HALL MOTORSPORTS Panhard Bar
MadZ28 OBD-I conversion
Taylor OVC wires
NGK Tr55's
160 thermo
LT4 KM
K&N
!airbox fins
!AIR
!EGR

Head flow numbers are as follows:
Lift....Intake.Exhaust..E/I ratio
0.050.....36.4....27.6......75.8%
0.100.....65.8....54.6......83.0%
0.150...100.0....80.1......80.1%
0.200...136.6..103.4......75.7%
0.250...163.5..123.9......75.8%
0.300...193.0..140.4......72.7%
0.350...220.3..154.9......70.3%
0.400...240.8..171.4......71.2%
0.450...253.8..177.2......69.8%
0.500...263.9..181.7......68.9%
0.550...269.9..187.7......69.5%
0.600...272.7..189.6......69.5%
0.650...273.9..191.0......69.7%
0.700...271.0..192.0......70.8%

Static compression is 10.9:1 and dynamic compression is 8.94:1

The car is an M6 and it has a 10 bolt with 3.42s. It will dyno on the stock 17x9 WS.6 rims and 275/40-17 tires.

I think that about covers it.

I will post results by 9pm CST on Monday.

For pics of the car/engine buildup click the link in my sig.

Chris

EDIT: Results:
408.8 RWHP 395.7 RWTQ SAE
417.6 RWHP 404.3 RWTQ STD
EDIT 2: The rest of the graphs
Run 1 HP and AFR
Run 2 HP and AFR
Run 2 compared to 3 HP and AFR
Run 3 HP and AFR
Run 3 compared to 4 HP and AFR
Run 4 compared to 5 HP and AFR
Run 5 SAE TQ and HP
Run 5 STD TQ and HP

 

Sounds like a nice set up. I mailed llyod for some prices. I should have asked for flow numbers also!! I am building a 383 also and just need to decide on the heads but with flow numbers like that I guess my mind has been made up!!! Where in Wisconsin are you? I live closer to Madison. What shop are you taking it to? I was considering spped inc, in Schaumberg,IL. Those guys have been really good to me, for 500 they'll do the dyno tune so that'll be cool to get some rwhp numbers. Hope ya get what your!

 

Your set up sounds very similar to mine, except I have the AFR 195's and the comp 306. I don't know the specs on your lloyd elliot cam so I am taking a stab in the dark here but I will guess 412 RWHP. With the head flow #s you posted you should have a real good set up.

BTW what are you cam specs?

 

I say 478rwhp and 489rwtq

The LE2 cam is similar to the GM 847 i hear but it supposed to give more power up top.

"LE2 cam pulls from 2200 to 6500 RPM and should make 400-420 RWHP with matching heads, 30-36 lb injectors, 52-58 mm TB, 1 3/4 LT's, no cats, GOOD tuning, etc. The heads are ported and machined for larger Ferrea 2.00/1.56 valves, matching springs (Comp 987/977 springs and Ti retainers or Bee Hive springs and CM retainers depending on lifter type and EXACT cam specs), locks, locators, milling, cleaning and assembly. These will flow about 270/190 with a 205 cc intake port."


Heads and cam are $1650 (plus shipping) and will need GOOD tuning. This has the RPM range of the CC 306 cam but will make more HP and TQ at peak and across the board. The REAL difference will be the LE2 cam will make TQ in the 2500 RPM range and the cc 306 doesn't start until way past this.

 

With a 10.9 static and a LE2 cam you are not at almost 9:1 DCR, that's a bad calculator you are using for that.

Other than that it looks good.

Bret

 

i say 435rwhp

 

so a 383 only adds 15hp over a 350?

 

Bret,

The calculator I used to attain that info is here:
http://www.kb-silvolite.com/calc.php?action=comp

Do you suggest a different calculator?

BTW Port dimensions at the pushrod pinch are 1.910 x 1.110

I really doubt it will make it that far power wise, but who knows.

Sorry, can't give you specifics, but its similar to the 847 cam.

When I am in Wisconsin, it is in Menomonie at UW Stout, but right now I am working in the Twin Cities.

I will be dynoing at Elite Autosport in the Twin Cities, but a good friend of mine from my car club will be doing the tuning.

Chris

 

Using that program I came up with similar numbers, The static is correct for sure, not sure about the dynamic, for Intake Closing Point (degrees)
ABDC @ 0.050 lift plus 15 degre am I just suposed to take the valve timing @ .050 ABDC number (43) and add 15 to it (43+15=58)? because thats what I did just wan't sure if it was right. Aslo what head gasket are you using? I am using a .050 stock felpro it looks like you are running a little thiner head gasket because we are using the same -16cc SRP pistons.

STATIC COMPRESSION RATIO 10.744

DYNAMIC EFFECTIVE COMPRESSION RATIO 09.011

 

I actually don't know much power a 383 will make. I was under the impression that 383's gave a huge power boost. But thinking about it now, 33 cubes isn't really that much if a difference. With that setup you should get around 400-420rwhp NA with a 350. So just going by a basic rule of thumb 1.14-1.2hp per cubic inch gives you 436.62h-459.6hp. But that's just like 3rd grader thinking If you make 478rwhp that would be awsome!

 

ed wright here in tulsa 383 dyno 474hp he got lt4 heads ported polished not sure on the cam size he drives it on the street occasionally it runs a bes 10.74

 

Do you not have them??
If not how did you calculate the dynamic comp?

 

I do have them, but part of paying extra for a custom cam is not giving all the little details out. I have said enough about it to get an idea or the general size, and that is all that I am at liberty to say.

Chris

 

I had an idea what the pinch was anyways..... Doesn't really have anything to do with DCR.

A LE2 cam on a 383 with 10.9:1 should have about 8.0-8.2:1 DCR.

I really wish at some point I never said that 9:1 was doable on pump gas, because it really is a detail oriented thing and it's not entirely safe. Low 8's is about perfect for DCR on most LT1 street motors on pump gas.

It is good to see that guys are looking at DCR. This has to be about the only forum on the net where DCR is a normal word. I think LS1tech.com just figured out DCR about a month or two ago.

Bret

 

it'll have a good amount more tq, but just a little more horsepower than a 350...