gotta call a little BS on this... :icon_bs: how did you get the dyno to pull that low accurately?
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- Thread starter johnlomant
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Bad Idea Baja
Charter Member
How do you think they dyno diesel motors there tough guy?
customtouch
New member
I don't claim to be a motor builder or know all about dyno's but here is what I was given. However I did notice I misread the hp. It is only "579" but I was not as interested in the hp when I was looking at it. Either way, if the motor does this "I" will be happy!
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a pump gas towing 454 that makes that TQ at 2,000 and that much HP at 6,000???
what cam and heads and intake?
if you told me 3,000 rpm on the TQ i'd probably start to believe it, but 2,000.... nope.. not with a natural aspirated pump gas 454 with ANY head...
a 454 with a Whipple is hard pressed to do that..
look at the 572/620 dyno charts for comparison... 118 more cubes, alum heads... BIG carb and intake.. headers... before and after mod's...
sorry, and totally respectfully here, I think it's just not gonna happen.. those numbers don't make sense.... why carry it out to 11,000 rpm? where are the A/F charts?
Happy Holidays,
GM Performance Parts ZZ572 Power Curve - Power Moves
Test 1 Test 2 Test 3
RPM TQ HP TQ HP TQ HP
2,000 469 179 534 203 595 228
2,100 476 190 533 213 582 233
2,200 481 201 534 224 578 242
2,300 492 216 535 234 587 257
2,400 498 228 538 246 593 271
2,500 507 241 548 261 597 284
2,600 507 251 553 274 605 300
2,700 518 266 560 288 612 315
2,800 531 283 564 301 622 332
2,900 537 297 565 312 629 347
3,000 542 309 568 325 640 365
3,100 551 325 576 340 648 382
3,200 557 340 585 357 652 398
3,300 565 355 597 375 656 412
3,400 569 369 605 391 656 425
3,500 574 383 616 410 661 440
3,600 579 397 621 426 663 454
3,700 582 410 626 441 663 467
3,800 591 428 633 458 661 479
3,900 596 443 635 471 659 489
4,000 608 463 635 484 653 498
4,100 616 481 637 497 648 506
4,200 626 501 640 512 641 512
4,300 634 519 640 524 634 519
4,400 639 535 642 538 628 526
4,500 645 553 641 550 619 530
4,600 648 567 641 562 612 536
4,700 648 580 640 573 604 540
4,800 649 593 638 582 594 543
4,900 648 605 636 593 588 548
5,000 646 615 631 601 577 549
5,100 643 624 628 610 564 548
5,200 637 630 624 618 552 546
5,300 630 636 619 625 536 541
5,400 624 642 610 628 522 537
5,500 615 644 603 632 509 533
5,600 607 647 593 633 492 525
5,700 597 648 581 631 468 509
5,800 585 646 568 627 452 499
5,900 568 638 553 621 431 484
6,000 551 629 533 609 412 470
what cam and heads and intake?
if you told me 3,000 rpm on the TQ i'd probably start to believe it, but 2,000.... nope.. not with a natural aspirated pump gas 454 with ANY head...
a 454 with a Whipple is hard pressed to do that..
look at the 572/620 dyno charts for comparison... 118 more cubes, alum heads... BIG carb and intake.. headers... before and after mod's...
sorry, and totally respectfully here, I think it's just not gonna happen.. those numbers don't make sense.... why carry it out to 11,000 rpm? where are the A/F charts?
Happy Holidays,
GM Performance Parts ZZ572 Power Curve - Power Moves
Test 1 Test 2 Test 3
RPM TQ HP TQ HP TQ HP
2,000 469 179 534 203 595 228
2,100 476 190 533 213 582 233
2,200 481 201 534 224 578 242
2,300 492 216 535 234 587 257
2,400 498 228 538 246 593 271
2,500 507 241 548 261 597 284
2,600 507 251 553 274 605 300
2,700 518 266 560 288 612 315
2,800 531 283 564 301 622 332
2,900 537 297 565 312 629 347
3,000 542 309 568 325 640 365
3,100 551 325 576 340 648 382
3,200 557 340 585 357 652 398
3,300 565 355 597 375 656 412
3,400 569 369 605 391 656 425
3,500 574 383 616 410 661 440
3,600 579 397 621 426 663 454
3,700 582 410 626 441 663 467
3,800 591 428 633 458 661 479
3,900 596 443 635 471 659 489
4,000 608 463 635 484 653 498
4,100 616 481 637 497 648 506
4,200 626 501 640 512 641 512
4,300 634 519 640 524 634 519
4,400 639 535 642 538 628 526
4,500 645 553 641 550 619 530
4,600 648 567 641 562 612 536
4,700 648 580 640 573 604 540
4,800 649 593 638 582 594 543
4,900 648 605 636 593 588 548
5,000 646 615 631 601 577 549
5,100 643 624 628 610 564 548
5,200 637 630 624 618 552 546
5,300 630 636 619 625 536 541
5,400 624 642 610 628 522 537
5,500 615 644 603 632 509 533
5,600 607 647 593 633 492 525
5,700 597 648 581 631 468 509
5,800 585 646 568 627 452 499
5,900 568 638 553 621 431 484
6,000 551 629 533 609 412 470
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Bill
New member
No, I really do not have any noise, but have had to replace Tie rods, 3 intermediate steering shats, control arms, steering gear boat, power steering pump, Hydro boost pump, tranny cooler lines sever times...and so on...
GM says my steering issues are from those monster 33" tires I have...yeah right! I think that GM built the front ends OK for gas trucks, but can't handle the weight of the Dmax/Allison combo...
imco offshore
Competitor / Charter Member
IMCO OFFSHORE RACE TEAM,,, http://www.imcooffshoreracing.com/media/IMCO_I-75_0001.wmv
customtouch
New member
In all fairness, that seems like an incredibly high amount of torque at a very low rpm. As I said, I am not an engine builder or an expert on Dyno's or their operation so I can not answer your questions, defend these results, or will I even try. You obviously must have a lifetime of experience as a professional custom engine builder to possess the knowledge of all combinations and all things possible. I will just stay within the realm of what I know. I know that I have no idea what combination of pistons, cam, heads, porting, boring, stroking or any other means of achieving these results he uses. I know I don't care. I know that just because one person can't do something does not mean another is not "smart enough" to make it happen. I know that he is a good friend of mine and a talented professional engine builder that has no reason to bull**** me or create a bogus Dyno report. I know that trying to compare specs from a production built crate race motor to a "purpose built" custom engine does not make any sense to me. I know that if his combination can produce ANYWHERE NEAR what that Dyno says, I will be a HAPPY CAMPER. I know that I am not the type to post B.S. just to try to impress people. With that being said, I know that I (very respectfully) really don't care what you think. I know how these types of "pizzing match" discussions always end up and I have no intention of doing that, so, I also know that I am done & it was nice chatting with you.:seeya: MERRY CHRISTMAS and HAPPY NEW YEAR!!!!
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hotjava66
New member
i had to replace ball joints etc. on my old duramax at 30000miles when i ran 33's. the ball joints are the same as the ones used on buick passenger cars if that explains anything. that was an 03 2500HD. dont know if the new ones are different or not.
Bill
New member
Mine is an 06, had the same running gear as your 03. I have some friends with 08's and 09's, all appear to be the same. And gov't motors wonders why they are not doing so good!!! Don't get me wrong, I love my truck, but these rediculous mexican parts are unexcuseable...
TxHawk
New member
Another blank canvas David.
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customtouch
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imco offshore
Competitor / Charter Member
welcome to SOS ,,nice rig,,looks great
Thanks. just found this site a couple days ago. seems pretty good.:cheers2:
4mulafastech
New member
Wow Bill, that sux. I have had only one issue with my 2005. It was a clunking noise coming from the steering column. The intermediate shaft was replaced under warranty (see link) and all has been good ever since. I guess the front ends must be sensitive to any changes (taller tires / lift kits). I have stock tires/height (I know, boring) and it seems to handle the Dmax/Allison combo just fine.
http://ww2.justanswer.com/uploads/Bluegorilla/2009-01-11_230548_Steering_shaft.pdf
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Team Tsunami
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