Deemax

iTrader: (1)

I'd appreciate it if someone who has Dyno2000 could run my engine and let me know what kind of power I'm making. The mods are in my sig. The cam duration is at .050 lift (gross duration 288 and 284) and the lobe centers are 110 degrees. The heads are stock 350 castings..I'm not sure of the combustion chamber volume, but it's about 9.4 compression with the .030 over flat top pistons (4 valve relief)..I'm guessing the heads are 64CC? Stock 350 TBI on an Edelbrock dual plane, with Edelbrock shortie headers...1 5/8 primaries, thru a hi-flow cat and 2 1/2 inch single exhaust...an Ed Wright chip and low-temp thermostat...open element air cleaner and cowl induction. Thanks...I appreciate this!!
Dave

Dolph88sc350TPI

Hey check your email

Sitting Bull

Here you go.

Dolph88sc350TPI

Hey sitting bull is that litestep in xp?

Ricktpi

More like this:

Sitting Bull

No, it is just plain old XP. That is WinAmp running in the corner of the screen capture. I was listening to some Molly Hatchet at the time--"Gator Country"

wingnut

Those HP/TQ numbers look to be a bit high. I'm not familiar with Dyno2000, but from that screen dump, the input factors seem to be very vague - correct me if I'm wrong.

I use bootleg copy of a program called Engine Analyzer v2.5. It was purchased through Summit several years ago. There is a large parts library to choose from when "building" the engine. But more importantly, you can input exact specs from your desired engine. If you have actual flow numbers for your heads, you can input them. You can also input the height/width of your ports. It is very detailed.

I ran your specs through EA25 and here's what I came up with:

RPM/TQ/HP
1500/336/95.9
2000/357/136
2500/371/177
3000/382/218
3500/387/258
4000/382/291
4500/366/313
5000/332/316
5500/295/308
6000/258/295

These numbers reflect dyno conditions (no accessories). Installed in a street car, the numbers would be slightly lower.

The limiting factor in your combination is the low CFM throttle body and the restrictive cylinder heads.

I'm not claiming that these numbers are exact, but they seem a bit more realistic than the Dyno2000 numbers, in my opinion.

Ricktpi

Or this:

gtabadboy

350 block bored .030, zero deck block, 383 stroker with a Eagle 4130 forged steel 400 crank, JE forged pistons 11.5:1 CR,
Lunati Hydraulic flat tappit Camshaft
adv in/ex 281°/285°
dur @ 050 248°252°
Lift at valve .606".585"
Lift at lobe .404".390"
Lobe sep 110° Sep 106° Int C/L
Opens/Closes @ .050 18°BTC 52°ABC /60°BBC 12°ATC
PART # 50169
Valve lash .020".022" Specs on http://www.holley.com/HiOctn/ProdLin...CC/Chevy4.html MODEL IS 50169

Dart Pro 1 aluminum heads, dont know the runners probably 215cc or 230cc whichever produces more HP can u check both??
Valves 2.05/1.60
Victor JR intake w/ holley mechanical 850 double pumper carb
1.6 roller tip rockers
Eagle 5140 forged steel I beam 6" Rods
head gasket .035 thick
THANKS MUCH

Ricktpi

One more time for the original post. The airflow data is wrong for his heads. This is a little more accurate:

wingnut

Ok, here goes...

Firstly, using the cam timing specs that you supplied, your cam actually has a duration of 250/252 @ .050".

Secondly, the only flow numbers for Dart Pro 1's that I could find were for the 230cc intake port version w\ 2.08"/1.6" valves - that's what I used (so the numbers may be a little on the high side).

The results:

RPM/TQ/HP
2500/435/207
3000/463/264
3500/476/317
4000/479/365
4500/496/425
5000/506/481
5500/498/521
6000/478/546
6500/448/554
7000/400/533

If you can give me flow numbers for your heads, I can make the adjustment and post the corrected numbers (I saved your engine file).

[Edit]
Your intake manifold isn't port-matched (to your heads) by chance is it? The ports on an "out of the box" Victor Jr intake are considerably smaller than the ports on the 230cc heads. With port-matching, that raises your peak HP to 582, while dropping your peak TQ to 496 (a worthwhile exchange).

Sitting Bull

I put in what the program will accept. I used the largest Lunati cam file I had and then plugged in your lift numbers. After checking the Lunati website I see that the cam is actually a roller, so I have changed that too. These curves are, as previously mentioned, at the flywheel with no accessories. To compensate, subtract 30 hp for parasitic accessories drag and then 15 to 20% of what remains in order to allow for drivetrain loss. It should come in at somewhere around 420 to 450 hp at the wheels.

You have a MONSTER smallblock here :hail: :rockon:

PS Didn't it work for you?

Sitting Bull

Here are your tables.

Sitting Bull

Yes, I was wrong. I used the L98 head flow file. It was from a workup I did the day before for someone else

RedFirebird

I already built my motor up for my corvette (stock L98 bit the dust so to speak) but i never ran a desktop dyno on it. I decided on all these parts after searching around these boards and talking to people and the machine shop. If someone could run a desktop dyno on it that would rock just for *hits and gigles. Here it is

377 (new 350 block w/383 crank)
10.6:1 compression
AFR 195 heads
Superram
LT4 Hot cam and matching LT4 roller rockers
1 5/8" headers
new exhaust

Thanks

:rockon:

CamaroFreak87

I thought a 377 was a 400 block with a 350 crank? And a 383 was a 350 block bored .030 with a 400 crank? As in ... a 350 with a 383 crank = 383

RedFirebird

ummm ok. I have a completely new block, so i didn't bore it over. And a 350 with a 383 crank=377. A "383" crank has the same 3.75" stroke as a 400 crank.........

Sitting Bull

Whoa-hoa!!! This is a wicked combination :hail:

Who did you get this from?

Sitting Bull

And here are the tables. This ought to be 300 rear wheel hp. And look at that torque!!! If this is a road racer and you choose a rear end ratio that keeps you in the torque sweet spot, that car will be VERY hard to keep up with coming out of the corners

Very sweet

RedFirebird

As i said, i searched these boards and talked to people and i stopped being a tight-@$$ money-wise . My old L98 in my vette ate a few valves when this lube-jock took it for a joy ride when i dropped the car off to be smogged , but i ended up getting a little $$$ to work with and i just ordered all the parts. I have another TPI base sitting in my garage from an '88 IROC (i bought the 23 degree heads) that i'm going to use. I'm definately going to be "removing material" from the base and the superram itself so i can tap into that 450-500 lbs of torque for a little more top end. I noticed on the screen you showed that that dyno sheet is with AFR 190s, the heads i have are 195's with 2.02/1.60 valves. I don't know how much of difference that'll make....

Sitting Bull

Yeah, I don't have the 195 flow file but I plugged in the larger valve sizes for you here. It helps in both hp and torque

Sitting Bull

And here is the chart.

Deemax

iTrader: (1)

Guys....thanks for your help on this! I really appreciate your responses, and your taking the time to do this. After the post, I got a copy of the program (and thanks also for that!) and ran it myself. I don't have have the exact info on my heads, so I just used the low performance/stock ports and valve choice..figuring this would be accurate, if not conservative. I do, however, have the seat to seat specs on my cam, so I input that, and know that thats accurate. My figures came up pretty close to wingnut's, actually a little lower...max 297 HP @5000, 345 FtLbs @ 4000, so I"ll call it somewhere around 300 HP and be happy with that. That's still better than we were guesstimating when we built it. It's a street cruiser, so 300 should be plenty (actually it's wifey's car, and as far as she knows, its only out to be repainted...hehehe). I just want to get the thing back at this point...it's been almost 3 months since we started building it...and I've still got another couple of weeks to go. Although, with any luck, I'll go down to see it in a few hours, and the first coat of red should be on...
Thanks again for the help and generosity guys...I'll be back to ask for help on how to post some pics when its done!
Dave
PS...gtabadboy...that IS one kickaz little motor you have there!

84 Z-28 350

can sombody run mine through my engin specs are in my sig, and I have flattop pistons w/2 valve relefs each(dont rember the cc but they are small

pennylessz28

WOW, some else running litestep? Damn, haven;t used that since the glory days of LiteStep.net when me and comrade ran ****

Sitting Bull

Here you go. It should be pretty close.

Sitting Bull

And the hp and torque tables. I think you don't need anywhere near that size of FI for the size of this engine.

Sitting Bull

No, this isn't Litestep. It is just the default XP style.

84 Z-28 350

I was looking at the #'s on the graph sidebar and I have 2.02/1.60 intake/exaust valves (came with heads) not 1.94/1.50 valves, I'm not sure if that would make a diffrence, but my car pulls allot harder then 385hp, I can smoke the tires in all 5 gears., Thanks for running it through, I was thinking about getting dyno 2000 but I'm saving for my back home.

Sitting Bull

The head specs are just what the flow file has fed into them. The larger valves would give you about 15 or 20 hp on the top end. So you have, according to DD2000, around 400 hp.

You know, that is a lot and the parts you use are not really radical, at least compared to some of the other workups we've done here.

gtabadboy

I think you used the wrong cam specs on my combo. I talked to someone who gave me the program and tried it myself. You used the right lift but BTC is 18, ABC 52, BBC 60, ATC 12 this is my chart now. I hope this is accurate, this engine will move! Does any one know how accurate this is?? Also how much HP will I lose through the drivetrain with a 700r4 tranny and stock flywheel?
HP TQ
4500 441 515
5000 501 526
5500 541 516
6000 568 497
6500 579 468
7000 571 429
7500 556 389

Sitting Bull

Subtract 30 hp for your water pump, alternator, power stering, etc., and then subtract 20% of what is left and that should leave you with your rear wheel hp.

Thus 579-30=549 hp
549-20%(110)=439 hp

You should have right on to 440 hp at the rear wheels. That is a dynomite small block :hail: :hail: :hail:

gtabadboy

Thanks for all your help everyone. I am picking the machinest this week, I narrowed it down to two guys I'm just gonna see how much they will charge. One guy includes a lifetime labor warrantee but i do not know him, the other machinest built my last engine and I know him but my last engine only ran a 14.8 ET. So we will have to see what their prices are. Ill keep everyone posted.