Desktop Dyno2000 question?
Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Desktop Dyno2000 question?
I'm setting up a 383 on DD2000 for my cousin's GTA. I'm not 100% positive what to use for the manifold type. I plan on going with Victor EFI or Stealth Ram (since it will fit under the GTA's hood). I currently have it set at single plane manifold and 1000cfm induction flow. Here are the numbers...
Do these sound good?
383, AFR210, 9.5:1, 1000cfm, Single Plane, lg tube headers,
custom roller (.572/.584, 238/250 @.50 - 111.5 lobe center)
DD2000 shows 526hp @ 6000
498tq @ 5000 (476tq @4000) --will be using 3800 stall
(only using 9.5:1 because will eventually SC or use lots of NOS)
So, does this sound right?
[Modified by HC4-Vette, 3:03 PM 1/7/2004]
Do these sound good?
383, AFR210, 9.5:1, 1000cfm, Single Plane, lg tube headers,
custom roller (.572/.584, 238/250 @.50 - 111.5 lobe center)
DD2000 shows 526hp @ 6000
498tq @ 5000 (476tq @4000) --will be using 3800 stall
(only using 9.5:1 because will eventually SC or use lots of NOS)
So, does this sound right?
[Modified by HC4-Vette, 3:03 PM 1/7/2004]
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Desktop Dyno2000 question? (scorp508)
I have to agree with Brian, though you can do some components comparisons with DD2000, absolute numbers are very questionable.
Now if you use Motion Software's Drag2000 drag strip sumulation package I've found that you can do some good tuning of drive train components for optimum 1/4 mile performance.
Now if you use Motion Software's Drag2000 drag strip sumulation package I've found that you can do some good tuning of drive train components for optimum 1/4 mile performance.
Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Re: Desktop Dyno2000 question? (65Z01)
Ya, I've read that the numbers are usually off by 15-20hp--- I'm just looking for ball park figures. Even if they are off by 20+hp it doesn't look too bad for a 9.5:1 motor. It's nice to play with different cams and heads to find the best match.
Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Re: Desktop Dyno2000 question? (HC4-Vette)
Hey,
It looks like DD2000 is pretty accurate. I just found a very similar modded 383 in a Chevy HP magazine that dynoed very close numbers to what I was coming up with.
Scorp, did you somehow enter in the wrong flow numbers for your heads?
It looks like DD2000 is pretty accurate. I just found a very similar modded 383 in a Chevy HP magazine that dynoed very close numbers to what I was coming up with.
Scorp, did you somehow enter in the wrong flow numbers for your heads?
Team Owner
Joined: Mar 2000
Posts: 83,381
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From: Boston, MA
Re: Desktop Dyno2000 question? (HC4-Vette)
Hey sorry I'm back now. I'm at work so I'll have to go home and check, but I actually believe I used stock flow #s for the D-port heads and mine have been ported/polished/larger valves/etc.
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Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Re: Desktop Dyno2000 question? (scorp508)
No problem.....
When I plug in the Dports, the HP drops 80+hp.
The article had a Big Cammed Solid Roller 383, with ported Dart Pro 1 215cc heads, 1-3/4" Headers, Super Victor Jr single plane and was dynoed at 524hp @ 6200rpm.
Is your current setup the one in your signature?
I notice that you used the Superram which seems to make more TQ vs HP.
(what manifold type did you choose in DD2000?---the superram would seem to fall between TPI and Dual Plane)
Thanks for the info
When I plug in the Dports, the HP drops 80+hp.
The article had a Big Cammed Solid Roller 383, with ported Dart Pro 1 215cc heads, 1-3/4" Headers, Super Victor Jr single plane and was dynoed at 524hp @ 6200rpm.
Is your current setup the one in your signature?
I notice that you used the Superram which seems to make more TQ vs HP.
(what manifold type did you choose in DD2000?---the superram would seem to fall between TPI and Dual Plane)
Thanks for the info
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Desktop Dyno2000 question? (HC4-Vette)
Modeling the GM EFI manifolds properly seems to be a big problem with DD2000 though they do give some instructions on which of the available choices to use depending on stock TPI or short runner intakes.
Plus they cannot (IMHO) model important head parameters such as swirl and variations in valve jobs, i.e. 30deg seats vs std 45deg seats.
Plus they cannot (IMHO) model important head parameters such as swirl and variations in valve jobs, i.e. 30deg seats vs std 45deg seats.
Thread Starter
Racer
Joined: Sep 2003
Posts: 260
Likes: 0
From: Indianapolis IN
Re: Desktop Dyno2000 question? (65Z01)
Agree.. I looked at the runner lengths to determine which manifold type.
As far as the heads, doesn't having the true flow(cfm) of the heads take care of valve jobs, etc... ?
As far as the heads, doesn't having the true flow(cfm) of the heads take care of valve jobs, etc... ?
Team Owner
Joined: Dec 2000
Posts: 90,675
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From: SE NY
Cruise-In II Veteran
Re: Desktop Dyno2000 question? (HC4-Vette)
For chuckles I just plugged in ported #113 heads with large valves, LT headers, and ZZ-9 cam with stock TPI and the numbers came out rather close to expected from some track data I have on my site.
Since I'm running a siamese intake base I haven't yet come with a good intake model though.
Since I'm running a siamese intake base I haven't yet come with a good intake model though.