Dyno sheets for 427 big blocks??????
Thread Starter
Drifting
Joined: Jan 2002
Posts: 1,484
Likes: 0
From: Northampton Ma
Re: Dyno sheets for 427 big blocks?????? (Corey 68)
I finally bought Desktop Dyno, and ran the 496 with the AFR 305's, Crane roller cam with .587/.610 lift, 10.8:1 compression, 850 cfm carb, dual plane manifold, large tube headers, and sidepipes. Here is what it came up with:
HP TQ
235 616@2000rpm
306 643@2500
371 650@3000
434 651@3500
496 651@4000
554 646@4500
599 629@5000
626 597@5500
632 553@6000
614 496@6500
With a 200hp shot of nitrous (track use only), it gave me this:
1141ft/lbs@2000rpm
832hp@6000rpm
:eek: :eek: :eek: :eek: :eek: :eek:
[Modified by Ryan77, 7:46 PM 3/17/2003]
HP TQ
235 616@2000rpm
306 643@2500
371 650@3000
434 651@3500
496 651@4000
554 646@4500
599 629@5000
626 597@5500
632 553@6000
614 496@6500
With a 200hp shot of nitrous (track use only), it gave me this:
1141ft/lbs@2000rpm
832hp@6000rpm
:eek: :eek: :eek: :eek: :eek: :eek:
[Modified by Ryan77, 7:46 PM 3/17/2003]
Safety Car
Joined: Aug 2001
Posts: 3,892
Likes: 13
From: Pettis Performance 565 with two stages of Nitrous Supply nitrous 1.082, 4.61 at 155, 7.17 at 192
Re: Dyno sheets for 427 big blocks?????? (Ryan77)
Do not hit the N20 at 2000 rpms or you will be picking up pieces that used to be your crank, rods, rings, etc. Best to keep a shot that big above 3500, at least.
Le Mans Master
Joined: Mar 2001
Posts: 6,240
Likes: 1,013
From: Watkinsville, GA and Glen Cove, NY
Re: Dyno sheets for 427 big blocks?????? (69 N.O.X. RATT)
If you haven't bought the Hooker's yet check out Stahl Headers as they have a sidemount specifically for raised port heads and from research I have found many of the fitting issues of Hookers are nonexistant with Stahl's. I will probably be going this route when I get mine together. Their header has shorter, equal length primaries with the collecter invisible under the car. Then the 4 inch tube comes out under the frame and runs he length of the car. Alot of the old Midyear and Shark racers used these headers as well as the pretty Red late C3 on the forum from Finland I believe (cant recall the name).
Thread Starter
Drifting
Joined: Jan 2002
Posts: 1,484
Likes: 0
From: Northampton Ma
Re: Dyno sheets for 427 big blocks?????? (69 N.O.X. RATT)
Do not hit the N20 at 2000 rpms or you will be picking up pieces that used to be your crank, rods, rings, etc. Best to keep a shot that big above 3500, at least.
[Modified by Ryan77, 2:26 PM 3/18/2003]
