that thing scoots! what is your engine/ pump set up?

for your viewing enjoyment....the bottle works like a champ...

this kit has the hardware you need...

http://www.ebay.com/itm/AED-Holley-41601-Rebuild-Kit-Vacuum-Sec-Carbs-650-750-/330523147681?hash=item4cf4b6fda1&item=330523147681&pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr

Intake manifold/Engine vac draws the secs open.
They basically open automaticlly, they kind of a b to see if they are opening all the way because u need to watch them while going full speed...
 when I went to oriellys in escondido, they a have a rebuild kit for 25-30 bucks, where are u located? Ill rebuild it for 40 and teach u everything u need to know.

push or pull? pics? will you ship 'em?

Success! took out the boat this weekend with the light silver spings in the distributor. +16 base timing and 21 advance bushing. So a total advance of 37. Gained gained 200 rpm and maxed at 5100 rpm. Didn't get any MPH readings though, too many fisherman out there and the speed limit is 35.

Swapped over to a piece of shit Ebay 850 Holley knock off mainbody and base plate. Don't buy 'em!! The float bowl screws weren't tapped right, down leg boosters are crooked and the accelerator pump nozzles squirt so wide the fuel doesn't go directly in the carb.  Total Junk!! Either way I Gained 100 rpm, peaked at 5200! Vac looks like it dropped down to 1-1.5.

Think I'm going to get the timing up another degree or 2 and lighter on the advance springs. Stickin' with the 750 holley for now, savin' up for a better 850 and the torker intake.

....all in at 2k, wow that's quick, I'm not going to run that curve first, my compression is too high to try that right off the bat.

Well your starting to talk me out of going for the higher rpm when you said its eaiser to go for speed.  Since the olds motor doesn't quite do so hot up in the higher rpm range and its got gobs of torque i figure the double A will be a safer way to go. RPM wise. Swapping the impeller will be the last thing I do.  I'll try the can't miss setup first.

I should be there at 3/4 to 1" with the 850

based getting the pump in the water more and a bit more roost.  It seems like the droop snoot is the hot set up, but i don't wanna screw around with cable and linkage BS. I figured a mini droop would be a good comparmise.  if it ain't gonna do jack, well thats why I'm here, to figure out what works.

Well, im getting the message that tunnels suck, you ain't hurting my feelings but thats what i'm runnin' at the moment.

It's cheaper to change the manifold then to F around with dual carbs, linkage, finding a dual quad top, blah blah blah.

Ray, the idea i'm planning is using the vac gauge is see how the changes effect the motor. You had mentioned throttle response, plugs and performance. The vac gauge should tell this, since we all know an engine is a big air pump. If I make a change that for example increases manifold vac at wide open throttle then I know it was a change for the better.  Vac also helps for sizing power valves.

I asked before if the guys who had tunnel rams and dual carb about there secondaries being vac or mech because IMO 1260 cfm is way over carbed for the volume of air/fuel one cylinder can process. But maybe i don't know shit.  If they were vac then the secondarys only open when there is enough vac to do so.  Since his boat idled better and better throttle reponse, I was thinking the secondaries where not opening or only at the top end... When the 1 to 1 linkage came into play that but the kabaash on vac seconday theory.  Gt mentioned an 850 and a victor doing about the same rpm. Shit i'd rather change a manifold stuff a double A in the pump and rip.

 I foundnthis article
http://www.jpmagazine.com/projectbuild/154_0711_455_bigblock_project_murderous_overkill_part_vi/index.html

Although we pushed Welfringer for specifics, we were unable to learn much more than the Edelbrock Torker manifold (PN 2730) underwent Mondello's proprietary blueprinting process. In a nutshell, the intake was port-matched to the cylinder heads using Mondello's gaskets and the plenum and ports were reworked to increase flow-a lot. Mondello also port-matched the Edelbrock Victor manifold (PN 2810) that we tested on Westech's dyno. The Victor was too macho for our engine, proving it needed even more compression, camshaft, and rpm to be happy. The Mondello-modded Torker proved to be an absolutely perfect match for the rest of the combo.


Displacement: 468ci
Bore x stroke: 4.185 x 4.250 inches
Compression ratio: 10.75:1
Rod length, center to center: 6.735 inches
Piston deck height: 0.002-inch
Chamber volume: 77cc
Rod bearing clearance: 0.025-inch
Crank endplay: 0.004-inch
Piston-ring end gap: 0.014-inch (top), 0.018-inch (middle), 0.025-inch (bottom)
Piston-to-wall clearance: 0.005-inch
Camshaft type: Comp Cams solid roller
Valve lift: 0.640-inch (int.), 0.649-inch (exh.)
Duration at 0.050: 268/276 degrees
Lash (hot): 0.020-inch
Lobe separation: 110 degrees
Valve spring (seat): 250 pounds at 1.750-inch

They have a monster cam in this thing and i they say victor is too much and the torker is the way to go.  Anyone run a torker and see better results?

for the guys with dual carbs, are the mech or vac secondaries?

its a dual plane upper manifold so that sux.  Maybe I'll get my precision sawsall out.

Checked the plugs and they all looked pretty close in color but the ones in the back looked more rich. Definitley not what i was expecting according to what was said.

New vac gauge on the way.  So when I run this sumbitch, I should be looking for the lowest amount of vacuum when i romp on it from dead stop or cruz on the primarys then floor it? Obviously its not vac at max rpm. Or do both say something about engine performance?  I'm diggin into a holley carb book tonite to find out more on manifold vac.

double D
(   .   )  (   .   )

ha! they probably had the tach switched to 6 cylinder

i picked 6k because that is what the cam is rated to.

yup single carb tunnel ram. I don't know why people frown on 'em, it's pulling good vac, other then they have no bottom end on the street, on a boat that doesn't matter.
offys carb selector says the manifold only needs a 650-700 with single carb, they don't specify displacement though.

GT so are you saying to go dual carbs? do you know what cam your buddy has? I would be happy with 5200 @ 70! it would be cheaper to change the cam.

here's an article i found, looks like an 850 is the min.

http://www.popularhotrodding.com/tech/0302phr_oldsmobile_455ci_engine_build/index.html


Dyno Results
STOCK REBUILD

With an Edelbrock Performer manifold,
 a Demon 850-cfm carb, MSD ignition,
and Hooker headers

RPM TORQUE HP
3,000 525 300
3,100 522 308
3,200 522 318
3,300 521 328
3,400 525 340
3,500 529 352
3,600 533 365
3,700 532 375
3,800 528 382
3,900 522 388
4,000 516 393
4,100 507 396
4,200 500 400
4,300 492 403
4,400 481 403
4,500 471 404
4,600 459 402
4,700 447 400
4,800 433 395
4,900 424 395
5,000 413 393
5,100 404 393
UPGRADED LEVEL 1- Same as the
 stock rebuild, but with COMP cam,
 rockers, springs, and pushrods

RPM TORQUE HP
3,000 490 280
3,100 490 290
3,200 494 301
3,300 496 312
3,400 507 328
3,500 527 351
3,600 531 364
3,700 536 377
3,800 538 389
3,900 538 400
4,000 536 408
4,100 526 411
4,200 520 416
4,300 513 420
4,400 507 425
4,500 501 429
4,600 494 433
4,700 485 434
4,800 474 433
4,900 465 434
5,000 456 434
5,100 449 436
5,200 442 438
5,300 435 438
5,400 422 434

UPGRADED LEVEL 2- Same as upgraded level 1,
 except for the Offenhauser
 Tunnel Ram, and dual Holley 750-cfm carbs

RPM TORQUE HP
3,000 512 292
3,100 514 304
3,200 518 316
3,300 520 327
3,400 526 341
3,500 535 356
3,600 538 369
3,700 541 381
3,800 537 389
3,900 531 394
4,000 526 401
4,100 518 404
4,200 510 408
4,300 505 413
4,400 498 418
4,500 493 423
4,600 488 427
4,700 481 430
4,800 473 432
4,900 464 433
5,000 456 436
5,100 455 442
5,200 450 445
5,300 447 452
5,400 440 452

Ok, here's the american turbine impellar chart

H.P. 9.5   9.25  AA     A     B       C
150 2900 3050 3200 3600 3800 4050
200 3200 3350 3500 4000 4200 4450
250 3450 3600 3700 4300 4500 4800
300 3800 3950 4050 4550 4800 5100
350 4050 4200 4300 4750 5100 5350
400 4250 4400 4500 5050 5300 5600
450 4450 4600 4700 5250 5500 5850
500 4650 4800 4950 5400 5700 6050
550 4800 4950 5100 5550 5850 N/A

ok 6k is probably too high of an expectation. I think I should at least be able to get it to 5400. 

around 72" wide

please send dimensions,

 make some room in your garage, let me know what you got, and lets make a deal.

located in escondido.