Calling Desktop Dyno Operators....
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Calling Desktop Dyno Operators....
I need someone to do a run on my 427 with 3 different cam profiles.
Comp Cams LS-6 Plus
239/246 @ .050 and .544/.539 lift on 112 deg LSA
Comp Cams Xtreme Energy solid
230/236 @ .050 and .553/.568 lift on 114 deg LSA
Crane F-304-2
238/248 @ .050 and .533/.567 lift on 114 deg LSA
The motor is basically a stock 427/435 so it has rect port heads (I can get you some basic flow info from the http://www.chevyhiperformance.com website), 0.030 over, stock stroke, with the factory low-rise tripower, but with Hooker Supercomp headers.
Let me know what other info you need for inputs and I'll hunt it down.
I'm very anxious to see what the torque/power curves look like.
Comp Cams LS-6 Plus
239/246 @ .050 and .544/.539 lift on 112 deg LSA
Comp Cams Xtreme Energy solid
230/236 @ .050 and .553/.568 lift on 114 deg LSA
Crane F-304-2
238/248 @ .050 and .533/.567 lift on 114 deg LSA
The motor is basically a stock 427/435 so it has rect port heads (I can get you some basic flow info from the http://www.chevyhiperformance.com website), 0.030 over, stock stroke, with the factory low-rise tripower, but with Hooker Supercomp headers.
Let me know what other info you need for inputs and I'll hunt it down.
I'm very anxious to see what the torque/power curves look like.
Drifting
Joined: Oct 2001
Posts: 1,699
Likes: 1
From: Westampton NJ
Re: Calling Desktop Dyno Operators.... (69L71)
Let me load up my laptop with Desktop Dyno 2000 and I'll get some graphs real quick. I should be able to make a good estimate.
I need your rated CFM, compression ratio, and intake/exhaust valve size. Also, I need to know what type of cam the 1st and 3rd are. I'm assuming hydraulic flat tappet.
Also, remember, DD is a little over excited in most cases...Oh, and I can run drag simulations as well... :D
[Modified by rainman69, 1:41 PM 10/22/2001]
[Modified by rainman69, 1:52 PM 10/22/2001]
I need your rated CFM, compression ratio, and intake/exhaust valve size. Also, I need to know what type of cam the 1st and 3rd are. I'm assuming hydraulic flat tappet.
Also, remember, DD is a little over excited in most cases...Oh, and I can run drag simulations as well... :D
[Modified by rainman69, 1:41 PM 10/22/2001]
[Modified by rainman69, 1:52 PM 10/22/2001]
Former Vendor
Joined: Apr 1999
Posts: 7,607
Likes: 1
From: ECS Sales & Service Advisor
Cruise-In III Veteran
Cruise-In V Veteran
Re: Calling Desktop Dyno Operators.... (69L71)
If I could find your damn phone # I'd give you the answer right now! (for some unknown reason I have your name programed in my cell... but with no phone #~~~!!!!)
Call me on my cell or at home and we can plug in the #'s!
Call me on my cell or at home and we can plug in the #'s!
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Re: Calling Desktop Dyno Operators.... (rainman69)
Tripower intakes are rated at around 1200CFM wide open. The compression is around 9.7:1, the valve sizes are 2.19/1.88. All 3 cams are mechanical flat tappet.
I can get approximate head flow numbers is you need em
Might want to run the Factory mechanical too just for comparisons:
Stock L71:
242/242 @ .050 and .520/.520 lift on 114 deg LSA
Mike: email me at mausc@erols.com
[Modified by 69L71, 3:40 PM 10/22/2001]
I can get approximate head flow numbers is you need em
Might want to run the Factory mechanical too just for comparisons:
Stock L71:
242/242 @ .050 and .520/.520 lift on 114 deg LSA
Mike: email me at mausc@erols.com
[Modified by 69L71, 3:40 PM 10/22/2001]
Former Vendor
Joined: Apr 1999
Posts: 7,607
Likes: 1
From: ECS Sales & Service Advisor
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Cruise-In V Veteran
Re: Calling Desktop Dyno Operators.... (69L71)
They all look really close to me....
EDIT..... they were all wrong tryin to remember how to use this program right!....... :crazy:
[Modified by Mike69, 6:10 PM 10/22/2001]
EDIT..... they were all wrong tryin to remember how to use this program right!....... :crazy:
[Modified by Mike69, 6:10 PM 10/22/2001]
Former Vendor
Joined: Apr 1999
Posts: 7,607
Likes: 1
From: ECS Sales & Service Advisor
Cruise-In III Veteran
Cruise-In V Veteran
Re: Calling Desktop Dyno Operators.... (69L71)
Wait a minute I think those curves are wrong...... those curves are too sharp.... let me play with it a little more
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Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
Re: Calling Desktop Dyno Operators.... (69L71)
Rainman,
When you get the numbers sorted out could you please post them here? There may be a cam change in my future & I'd sure like to see how they compare. Thanks.
When you get the numbers sorted out could you please post them here? There may be a cam change in my future & I'd sure like to see how they compare. Thanks.
Drifting
Joined: Oct 2001
Posts: 1,699
Likes: 1
From: Westampton NJ
Re: Calling Desktop Dyno Operators.... (Les)
Here's what I have :cool::
Stock
518 HP @ 5500, 531 lbft @ 4500
Comp Cams LS-6 Plus
529 HP @ 6000, 535 lbft @ 4500
Comp Cams Xtreme Energy
509 HP @ 5500, 542 lbft @ 4000
Crane F-304-2
532 HP @ 6000, 535 lbft @ 4500
They're all about the same...
[Modified by rainman69, 4:37 PM 10/22/2001]
Stock
518 HP @ 5500, 531 lbft @ 4500
Comp Cams LS-6 Plus
529 HP @ 6000, 535 lbft @ 4500
Comp Cams Xtreme Energy
509 HP @ 5500, 542 lbft @ 4000
Crane F-304-2
532 HP @ 6000, 535 lbft @ 4500
They're all about the same...
[Modified by rainman69, 4:37 PM 10/22/2001]
Le Mans Master
Joined: Dec 2000
Posts: 7,245
Likes: 4
Re: Calling Desktop Dyno Operators.... (69L71)
Yes... The stock CR on the L71 is 10.25. I dropped it a hair when I ordered parts to offset crappy 93 octane.
I must be missing something here. The stock CR on 1967-69 L71s is 11:1.
:confused: What's this 10.25:1?
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Re: Calling Desktop Dyno Operators.... (67HEAVEN)
My mistake. You're right. I was looking in the book under 427/390. The 435c is indeed 11.0:1. I still have mine around 9.7.
Rainman: Great curves man! Thanks. Yeah, they are similar, but the shapes are a bit interesting.
Rainman: Great curves man! Thanks. Yeah, they are similar, but the shapes are a bit interesting.
Former Vendor
Joined: Apr 1999
Posts: 7,607
Likes: 1
From: ECS Sales & Service Advisor
Cruise-In III Veteran
Cruise-In V Veteran
Re: Calling Desktop Dyno Operators.... (rainman69)
:cool: It's been a while since I used Dyno.... and aparently I forgot how to use it! Damn! Now I'll have to waste the whole night trying to get it right!
:cool:
:cool:
Instructor
Joined: Jun 2000
Posts: 198
Likes: 0
From: Buffalo, NY
Re: Calling Desktop Dyno Operators.... (69L71)
Rainman, boy I hate to even ask, but I just gotta know, could you run L71's spcs with the Comp 288AR solid roller? Duration@0.050 is 246, lift is .623, on a 110LSA. I'm just wondering how much HP the solid roller is worth above 5000 rpm.
BTW, what does the software show for the Crane F304-2 with 10.85:1 CR? ( now, I;m pushing it so you dont have to check). reason I ask is that my engine is similar to L71's ex the alum heads and 11:1 CR. I know if dont do 550hp, more like 520.
BTW, what does the software show for the Crane F304-2 with 10.85:1 CR? ( now, I;m pushing it so you dont have to check). reason I ask is that my engine is similar to L71's ex the alum heads and 11:1 CR. I know if dont do 550hp, more like 520.
Thread Starter
Drifting
Joined: Mar 1999
Posts: 1,381
Likes: 15
From: Lusby MD
Re: Calling Desktop Dyno Operators.... (427TRI)
Man, rainman. You just come on the board and already you're the resident Desktop Dyno genius! You should charge for your services (now that you've run mine that is). You could, at least get a couple bucks for beers!