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Old 01-20-2010, 10:30 PM   #1
jgh64pkup
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Talking desktop dyno please!!!

will someone do a desktop dyno for a combo that im going to do
350
3.48 stroke
4.06 bore
5cc flat tops
5.7 rods
stock gapped rings
im guessing .02 below deck on the piston
.04 gasket thickness and 4.1 bore
487 heads bowl blended with 1.94 1.50 valves 75cc chamber heads
i think these are the same castings as double humps
crane energizer cam 480 lift 284 adv duration
performer rpm intake gasket matched to heads
650 mighty demon
70mm turbo .80 ar 10 psi boost
thanks
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Last edited by jgh64pkup; 01-20-2010 at 11:23 PM.
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Old 01-20-2010, 11:18 PM   #2
ripdog28
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Re: desktop dyno please!!!

Desk Top Dyno is crap. Usually way off. Contact Super73 or look at the link in my sig. Super has an excellent program that has proven to be within a few ponies. If i were to guess on it, 275-300.
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462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.
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Old 01-20-2010, 11:24 PM   #3
jgh64pkup
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Re: desktop dyno please!!!

i changed it some
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Old 01-20-2010, 11:28 PM   #4
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Re: desktop dyno please!!!

Oh, didnt see the turbo. I would still try to get some 2.02 heads.
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69 c-10 BBC
462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.

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Old 01-20-2010, 11:35 PM   #5
jgh64pkup
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Re: desktop dyno please!!!

will they cut to that big
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Old 01-21-2010, 01:04 AM   #6
ripdog28
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Re: desktop dyno please!!!

Yea almost all 350 heads will and im sure those will. You will probly be better off getting a $500 set of vortech heads then spending the money on those old heads.
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69 c-10 BBC
462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.
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Old 01-21-2010, 02:11 AM   #7
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Re: desktop dyno please!!!

kinda hard to run boost when you're already at like 10.51:1 on iron heads =/
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Old 01-21-2010, 05:42 PM   #8
jgh64pkup
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Re: desktop dyno please!!!

they have 75cc chambers shouldnt that bring me down to about 9 to 1
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Old 01-21-2010, 07:41 PM   #9
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Re: desktop dyno please!!!

I started building a engine profile for you, but, garbage in = garbage out.. Please take a look at this thread. I need all the info listed or it won't be near right..

http://67-72chevytrucks.com/vboard/s...d.php?t=317628
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 01-21-2010, 08:20 PM   #10
jgh64pkup
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Re: desktop dyno please!!!

Engine info
Bore -
4.060
Stroke - 3.480
Factory tolerances or set up more as a race motor? - factory tolerances
Electric Water pump? - no
Electric Fan? - yes


Head data:
*----* Intake and Exhaust Valve size -
1.94 1.50
*----* Head flow numbers (Please provide them or a link to MFG's website, I don't want to have to search for info. If these are stock heads, try to give me a casting or something) - 487 heads
Compression ratio - 9 to 1

Type of intake (Single plain, dual plane, again link if you can find it). - edelbrock performer rpm dual plane http://www.edelbrock.com/automotive_...lds_main.shtml
Carb or TB (Is it a vacum carb?) - 650 mighty demon blow through http://www.barrygrant.com/demon/default.aspx?page=14

Header Data:
*----* Tube Diameter -
1 3/4
*----* Tube length to collector (this can be your best guess, but the more accurate, the better) - 30 in

cam info:
Link to MFG's web page or cam card would be best but..
Duration at .050"
Total Lift and based on what rocker ratio
Intake centerline
LSA -
i cant find anything on the cam so ill go with a diff one
heres a lunati voodoo
Advertised Duration (Int/Exh): 284/292
Duration @ .050 (Int/Exh): 241/249
Gross Valve Lift (Int/Exh): .525/.546
LSA/ICL: 110/106
Valve Lash (Int/Exh): Hyd/Hyd
RPM Range: 2500-6600
What rocker are you using? -1.5 harland sharp

Blower/turbo? - 70mm .80 ar 10 psi
I need to know size and PSI you are running.
Intercooler? Air to Air or Air to water? -
no intercooler


Vehicle Data (I am going to try to keep this simple and use my aero for the most part). - 1964 c10 short fleet
Total weight - guessing 3800
Front/Rear weight bias - ?
What trans you are running (Gear ratio if different than stock) - th 350 stock
Size converter (STR if you have it) - 2700 b & m 12 inch
Gear ratio - 3.73
Differential (Open, production posi, spool) - gov lock
Tire size (height, width and type, again if you have a link to the MFG's page, even better). - 275 60r15 mickey thompson et street radial http://www.mickeythompsontires.com/s...ETStreetRadial
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Last edited by jgh64pkup; 01-21-2010 at 08:25 PM.
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Old 01-21-2010, 08:47 PM   #11
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Re: desktop dyno please!!!

I'll see what i can come up with, but you sure your headers are going to be 30" length? Where are you mounting the turbo?

487 heads? Sorry, not a big old school guy. Do you know any factory flow data? Are they similar to a 462 casting? 441? 882? These are heads that are preloaded. If not, I'll need flow numbers for .300 .500 and .600
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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Old 01-21-2010, 08:53 PM   #12
jgh64pkup
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Re: desktop dyno please!!!

umm i forgot about them being turbo headers i guess around 18
-at .100"-.200"-.300"-.400"-.500"-.600" valve lift

-int-52-103-155-177-185-193
-exh-44-81-111-128-128-128
plus a little bowl work and a little combustion chamber smoothing
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Last edited by jgh64pkup; 01-21-2010 at 08:54 PM.
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Old 01-23-2010, 12:08 AM   #13
Super73
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Re: desktop dyno please!!!

I'll be gone for a couple weeks and will finish up when i get back.. sorry for the delay...
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------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
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