Biggus

ursus,

Thanks for your input. I have two 750 Holleys on the blower. Could you run it again?

Thanks,

Kurt

ursus

oops I missed the s on holley(s)

using 1500 cfm I get

2000 172.996201 454.115021
2500 248.455521 521.756592
3000 317.859802 556.254639
3500 389.035797 583.553711
4000 454.539612 596.583252
4500 514.184937 599.882446
5000 559.387329 587.356689
5500 567.363281 541.574036
6000 528.250244 462.218994
6500 505.860962 408.579987
7000 461.778625 346.333984
7500 407.747681 285.423370

Crazyhorse

Ursus, did you run it as a hydraulic roller cam?

Crazyhorse

I changed to the street blower, ran some different airflow numbers and went with a .7 underdrive on the blower and still came up with 683hp@6000, 658tq@4500

RickR

How about a
Gen VI 502
9.4 CR
Stock Rectangular port heads
Dart Single Plane
Holley 800
Gil Mag Choice w/diverters
Crane 169611 576 intake @ 105 CL and .598 exhaust

And could you run it again for 109 intake CL

Head Flow

http://www.chevyhiperformance.com/techarticles/41598/

Cam Card for 169611 http://dab7.cranecams.com/SpecCard/D...1=Display+Card
Thanks!

ursus

With a hydralic roller

2000 185.641800 487.309723
2500 267.919342 562.630615
3000 343.757019 601.574829
3500 421.436676 632.155029
4000 496.125671 651.164917
4500 564.624573 658.728638
5000 618.878601 649.822510
5500 634.452454 605.613708
6000 594.186096 519.912842
6500 572.758362 462.612549
7000 526.272583 394.704437
7500 470.137360 329.096130

p.s.
Head flow #'s I used for gm990's off chevperfmag site
.1 69 53
.2 125 101
.3 183 134
.4 233 163
.5 264 180
.6 292 185

ursus

Note DD's prediction of what a combo will produce can be fairly accurate or is sometimes off quite a bit, it is best at comparing what happens when you change one parameter like the CL

@105
2000 202.067566 530.427368
2500 268.073578 562.954529
3000 330.330231 578.077942
3500 392.854523 589.281799
4000 445.697266 584.977661
4500 476.648682 556.090149
5000 479.300690 503.265717
5500 460.536438 439.602966
6000 415.056854 363.174744
6500 378.486206 305.700378

@109
2000 200.219589 525.576416
2500 263.437439 553.218628
3000 324.747437 568.307983
3500 388.253876 582.380798
4000 443.560852 582.173645
4500 480.268860 560.313660
5000 493.868500 518.561951
5500 472.292175 450.824371
6000 440.366516 385.320709
6500 403.910522 326.235413

John B

I got 830 hp at 5500 on 116 octane with a 85 % eff intercooler! All on "Engine analyzer v3.0".

ursus

Why would you run 116 octane with a CR of 8.25:1 and 8 psi of boost, that would prob run on 87, but certainly 91 would be enough, it would make less power with 116

John B

My program uses correction factors for air temp, humidity and barometric pressure. At the SAE 60o air etc. it detonated on 93 octane. It will run fine with 90 degree air and 80% humidity with 93 octane, but horsepower was down 100.

BTW, 800 hp is a better number, I made a mistake on the input data. John B